Android左右滑动滚屏的实现

现如今主流的Android应用中,都少不了左右滑动滚屏这项功能,(貌似现在好多人使用智能机都习惯性的有事没事的左右滑屏,也不知道在干什么。。。嘿嘿),由于前段时间项目的需要,所以也对其研究了一下,总的来说滑屏实现有三种方式:(至于其他的实现方式目前后还没碰到。。。)

1.ViewPager 2.ViewFlipper 3.ViewFlow

 

一.ViewPager

官方文档介绍:http://developer.android.com/reference/android/support/v4/view/ViewPager.html

 

根据继承关系我们可以看出,ViewPager不在android sdk 自带jar包中,来源google 的补充组件android-support-v4.jar中,所以我们在3.0以前的版本中使用就需要导入该jar包了。

 

1.1 介绍:该类是一个布局管理器,它允许用户通过滑动左、右页的数据。你必须要一个实现了PagerAdapter接口从而生成的页面视图。

 

1.2 使用:

activity_main.xml


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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent" >

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

    <android.support.v4.view.ViewPager

        android:id="@+id/viewpager"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent" />

</RelativeLayout>

 

MainActivity类:


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package comzhf.android_viewpager;

import java.util.ArrayList;

import java.util.List;

import android.os.Bundle;

import android.app.Activity;

import android.support.v4.view.ViewPager;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

import android.widget.Toast;

/**

 * 主界面:ViewPagerViewPager不在android sdk 自带jar包中,来源google 的补充组件android-support-v4.jar

 */

public class ViewPagerActivity extends Activity {

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     

    private ViewPager mViewPager;

    List<View> viewList;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         

        LayoutInflater mInflater = getLayoutInflater().from(this);

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         

        View v1 = mInflater.inflate(R.layout.layout1, null);

        View v2 = mInflater.inflate(R.layout.layout2, null);

        View v3 = mInflater.inflate(R.layout.layout3, null);

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         

        //添加页面数据

        viewList = new ArrayList<View>();

        viewList.add(v1);

        viewList.add(v2);

        viewList.add(v3);

        //实例化适配器

        mViewPager = (ViewPager) findViewById(R.id.viewpager);

        mViewPager.setAdapter(new MyPagerAdapter(viewList));

        mViewPager.setCurrentItem(0); //设置默认当前页

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         

        View view = viewList.get(0);

        TextView textView = (TextView) view.findViewById(R.id.text_1);

        textView.setText("我是第一页");

        Button button = (Button) view.findViewById(R.id.button_1);

        button.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {

                // TODO Auto-generated method stub

                Toast.makeText(getApplicationContext(), "你点击了按钮", Toast.LENGTH_SHORT).show();

                }

        });

    }

}

这里还有三个布局文件:layout1.xml (其余两个类似,略)


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<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical"

    android:background="@drawable/guide01" >

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

    <TextView

        android:id="@+id/text_1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center_horizontal"

        android:text="叶片一"

        android:textSize="25sp" />

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

    <Button

        android:id="@+id/button_1"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="点击我"

        >

    </Button>

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

</LinearLayout>

效果图:

补充说明:

1.这里我们用了Layout作为每个page的填充数据,其实官方文档说ViewPager+Fragment配合使用更好

2.每个页面的响应事件我们可以在OnPageChangeListener监听器类中进行捕获和处理对应事件。

 

二.ViewFlipper

 

官方文档:http://developer.android.com/reference/android/widget/ViewFlipper.html

2.1 介绍:ViewFilpper控件是系统自带控件之一,主要用于在同一个屏幕间的切换及设置动画效果、间隔时间,且可以自动播放。

顺便提及一下,View动画关系图:

2.2 使用:

2.2.1 静态加载:

activity_main.xml:


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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent" >

    <ViewFlipper

        android:id="@+id/body_flipper"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:background="#f0f0f0" >

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        

         <include

            android:id="@+id/layout01"

            layout="@layout/page1" />

        <include

            android:id="@+id/layout02"

            layout="@layout/page2" />

        <include

            android:id="@+id/layout02"

            layout="@layout/page3" />

        <include

            android:id="@+id/layout02"

            layout="@layout/page4" />

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        

    </ViewFlipper>

</RelativeLayout>

MainActivity类:


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package com.zhf.android_viewflipper_view;

import android.os.Bundle;

import android.app.Activity;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnTouchListener;

import android.view.animation.AnimationUtils;

import android.widget.ViewFlipper;

/**

 * ViewFlipper 静态加载

 * @author ZHF

**/

public class MainActivity extends Activity implements OnTouchListener{

    private ViewFlipper viewFlipper;

    private float touchDownX;  // 手指按下的X坐标

    private float touchUpX;  //手指松开的X坐标

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    

        viewFlipper = (ViewFlipper) findViewById(R.id.body_flipper);

        viewFlipper.setOnTouchListener(this);

    }

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    

    @Override

    public boolean onTouch(View v, MotionEvent event) {

        if (event.getAction() == MotionEvent.ACTION_DOWN) {

            // 取得左右滑动时手指按下的X坐标

            touchDownX = event.getX();

            return true;

        else if (event.getAction() == MotionEvent.ACTION_UP) {

            // 取得左右滑动时手指松开的X坐标

            touchUpX = event.getX();

            // 从左往右,看前一个View

            if (touchUpX - touchDownX > 100) {

                // 显示上一屏动画

                viewFlipper.setInAnimation(AnimationUtils.loadAnimation(this,

                       R.anim.push_right_in));

                viewFlipper.setOutAnimation(AnimationUtils.loadAnimation(this,

                        R.anim.push_right_out));

                // 显示上一屏的View

                viewFlipper.showPrevious();

                // 从右往左,看后一个View

            else if (touchDownX - touchUpX > 100) {

                //显示下一屏的动画

                viewFlipper.setInAnimation(AnimationUtils.loadAnimation(this,

                        R.anim.push_left_in));

                viewFlipper.setOutAnimation(AnimationUtils.loadAnimation(this,

                        R.anim.push_left_out));

                // 显示下一屏的View

                viewFlipper.showNext();

            }

            return true;

        }

        return false;

    }

}

动画配置文件(右进右出同理,略):

push_left_in.xml:


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<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android" >

    <translate

        android:duration="500"

        android:fromXDelta="100.0%p"

        android:toXDelta="0.0" />

    <alpha

        android:duration="500"

        android:fromAlpha="0.1"

        android:toAlpha="1.0" />

</set>

push_left_out.xml:


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<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android" >

    <translate

        android:duration="500"

        android:fromXDelta="0.0"

        android:toXDelta="-100.0%p" />

    <alpha

        android:duration="500"

        android:fromAlpha="1.0"

        android:toAlpha="0.1" />

</set>

效果:

向左滑屏 向右滑屏

补充:

上述的page只有4个,而真实项目中的page页面个数是不确定的,所以下面这种方式是项目中经常用到的。

 

2.2.2 动态加载(重要)

参考文章:http://blog.csdn.net/yuzhiboyi/article/details/7702953

activity_main2.xml


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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent" >

    <com.zhf.android_viewflipper_view.MyViewFlipper

        android:id="@+id/body_flipper"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:background="#f0f0f0" >

    </com.zhf.android_viewflipper_view.MyViewFlipper>

</RelativeLayout>

flipper_view.xml:


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<?xml version="1.0" encoding="utf-8"?>

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:scrollbars="none" >

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

    <LinearLayout

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:gravity="center"

        android:orientation="vertical" >

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

        <ImageView

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:src="@drawable/ic_launcher" />

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

        <TextView

            android:id="@+id/textView"

            android:textSize="100dip"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content" />

    </LinearLayout>

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

</ScrollView>

注:这里并不是所有的View都能有onFling回调函数,外部需要加ScrollView !

MyGestureListener类:自定义滑动事件监听器


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package com.zhf.android_viewflipper_view;

import android.view.GestureDetector.SimpleOnGestureListener;

import android.view.MotionEvent;

/**

 * 自定义滑动事件监听器

 * SimpleOnGestureListener已经实现了OnGestureListener接口和OnDoubleTapListener接口,

 * 可以有选择性的复写需要的方法,提供方法onFling()作为滑动事件的回调函数

 * @author ZHF

 *

 */

public class MyGestureListener extends SimpleOnGestureListener{

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

    private OnFlingListener mOnFlingListener;

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              

    /**用户按下触摸屏、快速移动后松开,由1个MotionEvent ACTION_DOWN, 多个ACTION_MOVE, 1个ACTION_UP触发 **/

    @Override

    public final boolean onFling(final MotionEvent e1, final MotionEvent e2,

            final float speedX, final float speedY) {

        if (mOnFlingListener == null) {

            return super.onFling(e1, e2, speedX, speedY);

        }

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              

        float XFrom = e1.getX();  //按下坐标

        float XTo = e2.getX();

        float YFrom = e1.getY();

        float YTo = e2.getY();

        // 左右滑动的X轴幅度大于100,并且X轴方向的速度大于100

        if (Math.abs(XFrom - XTo) > 100.0f && Math.abs(speedX) > 100.0f) {

            // X轴幅度大于Y轴的幅度

            if (Math.abs(XFrom - XTo) >= Math.abs(YFrom - YTo)) {

                if (XFrom > XTo) {

                    // 下一个

                    mOnFlingListener.flingToNext();

                else {

                    // 上一个

                    mOnFlingListener.flingToPrevious();

                }

            }

        else {

            return false;

        }

        return true;

    }

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              

    /**自定义滑动的回调接口**/

    public interface OnFlingListener {

        void flingToNext();  //滑动到下一页

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              

        void flingToPrevious();  //滑动到上一页

    }

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

    public OnFlingListener getOnFlingListener() {

        return mOnFlingListener;

    }

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              

    public void setOnFlingListener(OnFlingListener mOnFlingListener) {

        this.mOnFlingListener = mOnFlingListener;

    }

}

MyViewFlipper类:自定义View滑动类:监听滑动事件,并做切换视图的处理。


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package com.zhf.android_viewflipper_view;

import android.content.Context;

import android.util.AttributeSet;

import android.view.GestureDetector;

import android.view.MotionEvent;

import android.view.View;

import android.widget.ViewFlipper;

import com.zhf.android_viewflipper_view.MyGestureListener.OnFlingListener;

/**

 * 自定义View滑动类:监听滑动事件,并做切换视图的处理。

 * @author ZHF

 *

 */

public class MyViewFlipper extends ViewFlipper implements OnFlingListener {

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    

    //手势监听类

    private GestureDetector mGestureDetector = null;

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

    private OnViewFlipperListener mOnViewFlipperListener = null;

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

    public MyViewFlipper(Context context) {

        super(context);

    }

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

    public MyViewFlipper(Context context, AttributeSet attrs) {

        super(context, attrs);

    }

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

    public void setOnViewFlipperListener(OnViewFlipperListener mOnViewFlipperListener) {

        this.mOnViewFlipperListener = mOnViewFlipperListener;

        //初始化自定义滑动事件监听器

        MyGestureListener myGestureListener = new MyGestureListener();

        //绑定自定义的滑动监听器

        myGestureListener.setOnFlingListener(this);

        mGestureDetector = new GestureDetector(myGestureListener);

    }

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

    @Override

    public boolean onInterceptTouchEvent(MotionEvent ev) {

        if (null != mGestureDetector) {

            return mGestureDetector.onTouchEvent(ev);

        else {

            return super.onInterceptTouchEvent(ev);

        }

    }

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

    /**向下一条滑动事件**/

    @Override

    public void flingToNext() {

        if (null != mOnViewFlipperListener) {

            int childCnt = getChildCount();

            if (childCnt == 2) {

                removeViewAt(1);

            }

            addView(mOnViewFlipperListener.getNextView(), 0);

            if (0 != childCnt) {

                setInAnimation(getContext(), R.anim.push_left_in);

                setOutAnimation(getContext(), R.anim.push_left_out);

                setDisplayedChild(0);

            }

        }

    }

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

    /**向上一条滑动事件**/

    @Override

    public void flingToPrevious() {

        if (null != mOnViewFlipperListener) {

            int childCnt = getChildCount();

            if (childCnt == 2) {

                removeViewAt(1);

            }

            addView(mOnViewFlipperListener.getPreviousView(), 0);

            if (0 != childCnt) {

                setInAnimation(getContext(), R.anim.push_right_in);

                setOutAnimation(getContext(), R.anim.push_right_out);

                setDisplayedChild(0);

            }

        }

    }

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

    /**自定义View变化监听回调接口**/

    public interface OnViewFlipperListener {

        View getNextView();   //获取下一页View

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

        View getPreviousView();  //获取上一页View

    }

}

MainActivity2类:


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package com.zhf.android_viewflipper_view;

import com.zhf.android_viewflipper_view.MyViewFlipper.OnViewFlipperListener;

import android.app.Activity;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.widget.ScrollView;

import android.widget.TextView;

/**

 * ViewFlipper 动态加载

 * @author ZHF

 */

public class MainActivity2 extends Activity implements OnViewFlipperListener{

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 

      private MyViewFlipper myViewFlipper;

      private int currentNumber;

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main2);

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     

        currentNumber = 1;  //默认页号

        myViewFlipper = (MyViewFlipper) findViewById(R.id.body_flipper);

        //给ViewFlipper绑定自定义的滑动监听器

        myViewFlipper.setOnViewFlipperListener(this);

        //初始化页面数据,即View

        myViewFlipper.addView(createView(currentNumber));

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     

    }

    /**获取下一页View**/

    @Override

    public View getNextView() {

        currentNumber = currentNumber == 10 1 : currentNumber + 1;

        return createView(currentNumber);

    }

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

    /**获取上一页View**/

    @Override

    public View getPreviousView() {

        currentNumber = currentNumber == 1 10 : currentNumber - 1;

        return createView(currentNumber);

    }

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

    /**更换View数据:这里是根据页号来更换textView上的文字**/

    private View createView(int currentNumber) {

        LayoutInflater layoutInflater = LayoutInflater.from(this);

        ScrollView resultView = (ScrollView) layoutInflater.inflate(R.layout.flipper_view, null);

        ((TextView) resultView.findViewById(R.id.textView)).setText(currentNumber + "");

        return resultView;

    }

}

效果图:

--向左滑动(渐变过程不好截图)--> 

补充说明:

上述的三个类:

MyGestureListener:继承了SimpleGestureListener手势监听类, 复写了该类onFling()方法,用于监听用户按下滑动事件的处理;还自定义了滑动的回调接口OnFlingListener(包含了两个抽象方法flingToNext(),flingToPrevious)。

 

MyViewFlipper:是一个自定义ViewFlipper,该类首先实现和绑定了上一个类中的滑动的回调接口OnFlingListener,完成了接口中两个重要的方法。同时定义了一个View变化监听回调接口OnViewFlipperListener(包含了两个抽象方法getNextView(),getPreviousView())。

 

MainActivity2:加载布局,实现监听,统一处理页面数据View和滑动事件的绑定。

三.ViewFlow类

 

3.1介绍:

ViewFlow不是google官方的api,它是gethub上的一个开源项目,利用ViewFlow可以产生视图切换的效果。ViewFlow 相当于 Android UI 部件提供水平滚动的 ViewGroup,使用 Adapter 进行条目绑定,例如ViewPager或是ViewFlipper。它提供了三个组件ViewFlow、FlowIndicator和TitleFlowIndicator,一般情况下,当你需要做一个滑动然而不确定view的数目时,可以考虑使用ViewFlow。如果你的view数目确定,使用Fragments 或兼容库里的ViewPager比较好 。

 

3.2使用:

A.首先下载ViewFlow开源库代码:

官方文档:https://github.com/pakerfeldt/android-viewflow

B.下载之后我们解压打开viewflow文件夹:

C.建项目将这三个类直接复制过来放项目中使用即可。

 

 

 

 

 

 

注:这里可能还需要一个styleable文件,直接将value文件夹下的attrs.xml拷入即可。

activity_main.xml


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<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res/com.zhf.android_viewflow"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <FrameLayout

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:orientation="vertical" >

        <RelativeLayout

            android:layout_width="fill_parent"

            android:layout_height="135dp"

            android:orientation="vertical" >

                                                                                                                                                                                                                                                                                                

            <com.zhf.android_viewflow.ViewFlow

                android:id="@+id/viewflow"

                android:layout_width="fill_parent"

                android:layout_height="fill_parent"

                app:sidebuffer="3"/>

        </RelativeLayout>

        <com.zhf.android_viewflow.CircleFlowIndicator

            android:id="@+id/viewflowindic"

            android:layout_width="wrap_content"

            android:layout_height="140dp"

            android:layout_alignParentBottom="true"

            android:layout_gravity="center_horizontal"

            app:fadeOut="0"

            app:inactiveType="fill"

            android:paddingTop="125dp" />

        <!--圆点指示器还支持activeColor、inactiveColor、activeType(填充或描边)、

            inactiveType(填充或描边)、

            fadeOut(设置圆点自动隐藏的秒数,若为0则不会自动隐藏)、

            radius(圆点的半径)等。

        -->

    </FrameLayout>

</LinearLayout>

注:这里需要强调一下,因为使用第三方的库组件,所以要在使用之前引入:

xmlns:app="http://schemas.android.com/apk/res/com.zhf.android_viewflow"

 

main_item.xml


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<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:isScrollContainer="true"

    android:scrollbarAlwaysDrawVerticalTrack="true"

    android:scrollbars="vertical" >

<!-- isScrollContainer   设置当前View为滚动容器

    scrollbarAlwaysDrawVerticalTrack      设置是否始终显示垂直滚动条-->

    <ImageView

        android:id="@+id/imgView"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:layout_gravity="center_vertical|center_horizontal" >

    </ImageView>

</LinearLayout>

MainActivity类


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package com.zhf.android_viewflow;

import android.os.Bundle;

import android.app.Activity;

import android.content.res.Configuration;

public class MainActivity extends Activity {

    private ViewFlow viewFlow;

    private CircleFlowIndicator indic;  //页表指示器

                                                                                                                                                                                                             

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

                                                                                                                                                                                                                 

        viewFlow = (ViewFlow) findViewById(R.id.viewflow);

        //为其绑定适配器

        viewFlow.setAdapter(new ImageAdapter(this),5); //初始位置5

                                                                                                                                                                                                             

        indic = (CircleFlowIndicator) findViewById(R.id.viewflowindic);

        //为viewFlow绑定页表指示器

        viewFlow.setFlowIndicator(indic);

    }

                                                                                                                                                                                                             

    /**处理转屏操作**/

    @Override

    public void onConfigurationChanged(Configuration newConfig) {

        super.onConfigurationChanged(newConfig);

        viewFlow.onConfigurationChanged(newConfig);

    }

}

这里还有一个图片适配器:ImageAdapter


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package com.zhf.android_viewflow;

import com.cjf.ui.R;

import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.ImageView;

public class ImageAdapter extends BaseAdapter{

                                                                                                                                                                             

    private LayoutInflater mInflater;

    //图片资源的id

    private static final int[] ids = { R.drawable.a, R.drawable.b, R.drawable.c, R.drawable.d,

        R.drawable.e, R.drawable.f, R.drawable.g, R.drawable.h};

    public ImageAdapter(Context context) {

        this.mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    }

    @Override

    public int getCount() {

        // TODO Auto-generated method stub

        return ids == null 0 :ids.length;

    }

    @Override

    public Object getItem(int position) {

        // TODO Auto-generated method stub

        return position;

    }

    @Override

    public long getItemId(int position) {

        // TODO Auto-generated method stub

        return position;

    }

    @Override

    public View getView(int position, View convertView, ViewGroup parent) {

                                                                                                                                                                                 

        if (convertView == null) {

            convertView = mInflater.inflate(R.layout.image_item, null);

        }

        ((ImageView) convertView.findViewById(R.id.imgView)).setImageResource(ids[position]);

        return convertView;

    }

}

运行一下吧!效果图:

转屏后 

恩,终于写完了! 希望这篇博客能帮助到大家!好累~~

三个例子的源码我已总结好(独立的三个项目,压缩在一个zip里了)

下载地址:http://down.51cto.com/data/976370

Android左右滑动滚屏的实现,布布扣,bubuko.com

时间: 2024-10-11 05:03:03

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