- xml
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
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:orientation="vertical"
>
<com.guyulei.myqq50.DragLayout
android:background="@mipmap/bk"
android:id="@+id/dl_dragLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="vertical"
android:background="#f00"
android:layout_width="200dp"
android:layout_height="match_parent">
<RelativeLayout
android:background="#0ff"
android:layout_width="match_parent"
android:layout_height="150dp">
<ImageView
android:layout_marginLeft="15dp"
android:layout_centerVertical="true"
android:src="@mipmap/qq4"
android:layout_width="135dp"
android:layout_height="135dp"/>
</RelativeLayout>
<ListView
android:id="@+id/left_listView"
android:layout_width="match_parent"
android:layout_height="match_parent">
</ListView>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:background="#0f0"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:background="#f0f"
android:layout_width="match_parent"
android:layout_height="88dp">
<ImageView
android:id="@+id/iv_head"
android:layout_marginLeft="15dp"
android:layout_centerVertical="true"
android:src="@mipmap/qq4"
android:layout_width="77dp"
android:layout_height="77dp"/>
</RelativeLayout>
<ListView
android:id="@+id/main_listView"
android:layout_width="match_parent"
android:layout_height="match_parent">
</ListView>
</LinearLayout>
</com.guyulei.myqq50.DragLayout>
</LinearLayout>
2.自定义view
public class DragLayout extends FrameLayout
package com.guyulei.myqq50;
import android.content.Context;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.support.v4.view.ViewCompat;
import android.support.v4.widget.ViewDragHelper;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
/**
* Created by Administrator on 2016/6/30 0030.
* 1、为什么不继承 ViewGroup,因为继承 ViewGroup 需要重写 onMeasure()和实现 onLayout()方法，自己
* 实现子 view 的测量和摆放，在这里我们不需要自己去做测量和摆放，而 FrameLayout 已经对这两个方法进
* 行了具体实现，所以继承 FrameLayout 更加简单省事
* 2、为什么不继承 RelativeLayout,因为这里我们只需要层级关系，不需要相对关系，继承 RelativeLayout
* 界面效果是一样的，但 RelativeLayout 对 FrameLayout 多了相对关系的计算，效率会低一些，所以选择继
* 承 FrameLayout
*/
public class DragLayout extends FrameLayout {
private ViewDragHelper mViewDragHelper;
private LinearLayout mLeftContent;
private LinearLayout mMainContent;
private int mWidth;
private int mHeight;
private int mRange;
private int mLeftWidth;
//状态值
public enum Status {
Open,
Close,
Draging;
}
//默认状态值
private Status status = Status.Close;
//监听对象声明
private OnUpdataDragStateListener mOnUpdataDragStateListener;
//对外接口
public interface OnUpdataDragStateListener {
void onOpen();
void onClose();
void onDragging(float percent);
}
//对外接口回调方法
public void setOnUpdataDragStateListener(OnUpdataDragStateListener onUpdataDragStateListener) {
this.mOnUpdataDragStateListener = onUpdataDragStateListener;
}
//串联构造方法
/**
* 我们可以通过串连三个构造方法的方式实现只调用一次 init()方法
* 这样无论是代码创建还是布局在 xml 中都能调用到我们的初始化代码
*
* @param context
*/
//代码创建时调用
public DragLayout(Context context) {
this(context, null);
}
//布局在 xml 中，实例化时调用
public DragLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public DragLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
//初始化
//1.辅助类ViewDragHelper forparent 2个拖拽控件的父控件 ,sensitivity子控件拖拽的敏感度
//callback:事件回调
mViewDragHelper = ViewDragHelper.create(this, 1.0f, new ViewDragHelper.Callback() {
@Override
// tryCaptureView俘获; 夺取; 夺得（尝试夺取子控件）
//返回值代表 子控件 是否可以被夺取
public boolean tryCaptureView(View child, int pointerId) {
return true;
}
//可通过计算测量水平或者垂直方向拖拽的范围 返回>0即可
@Override
public int getViewHorizontalDragRange(View child) {
return mRange;
}
@Override
//clamp紧紧抓住; 紧夹住(紧抓着俘获的view(child)水平或者垂直移动位置)
//dx 变化量(移动的差值 newleft-oldleft)
public int clampViewPositionHorizontal(View child, int left, int dx) {
//dx累加 是 left
if (child == mMainContent) {
//拖拽为主面板时
left = fixleft(left);
}
return left;
}
@Override
//松手时 回调(Released释放)
public void onViewReleased(View releasedChild, float xvel, float yvel) {
// xvel水平方向上的速度 左为- 右为+
if (xvel == 0 && mMainContent.getLeft() > mRange / 2) {
open();
} else if (xvel > 0) {
//有向右的速度
open();
} else {
close();
}
}
//位置发生移动 调用
@Override
public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) {
if (changedView == mLeftContent) {
//控制底下的子控件不能移动(左面板)
mLeftWidth = mLeftContent.getMeasuredWidth();
mLeftContent.layout(0, 0, mLeftWidth, mHeight);
//左面板移动的距离 累加给主面板(移动左面板)
int oldLeft = mMainContent.getLeft();
int newLeft = oldLeft + dx;
//修正左边的位置
newLeft = fixleft(newLeft);
mMainContent.layout(newLeft, 0, newLeft + mWidth, mHeight);
}
// dispatch派遣，调度; （迅速地）发出; 迅速处理
dispatchEvent();
invalidate();
}
});
}
//2 mViewDragHelper抢过触摸事件自己决定应该怎么处理
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
return mViewDragHelper.shouldInterceptTouchEvent(ev);
}
//3.mViewDragHelper抢过触摸事件后，进行处理，返回值true
@Override
public boolean onTouchEvent(MotionEvent event) {
mViewDragHelper.processTouchEvent(event);
return true;
}
//4.onFinishInflate()在控件 inflate 完成时会被调用查找子控件
//可以通过 findViewById()的方式查找子控件 getChildAt(0)
@Override
protected void onFinishInflate() {
super.onFinishInflate();
mLeftContent = (LinearLayout) getChildAt(0);
mMainContent = (LinearLayout) getChildAt(1);
}
// 5.onSizeChanged()调用的次数比 onMeasure()少，在这里我们在 onSizeChanged()方法中去获取宽高
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
//获取整个控件的宽度和高度
mWidth = getMeasuredWidth();
mHeight = getMeasuredHeight();
//主界面拖拽的范围（自定义）（0-mRange）(0 < left <mRange)
mRange = (int) (mWidth * 0.6f);
}
//6.修正左边的距离
private int fixleft(int left) {
if (left < 0) {
left = 0;
} else if (left > mRange) {
left = mRange;
}
return left;
}
//7.打开 smooth变平和，变缓和;Slide Mountain 斯来得山（凯次克来最高峰）
//View child, int finalLeft, int finalTop
private void open() {
open(true);
}
private void open(boolean isSmooth) {
int finalLeft = mRange;
if (isSmooth) {
//开启平滑
if (mViewDragHelper.smoothSlideViewTo(mMainContent, finalLeft, 0)) {
//重绘界面 Compat兼容性; postInvalidateOnAnimation 动画结束之后再重绘 防止丢帧
ViewCompat.postInvalidateOnAnimation(this);
} else {
mMainContent.layout(finalLeft, 0, finalLeft + mWidth, mHeight);
}
}
}
//8. 关闭
private void close() {
close(true);
}
private void close(boolean isSmooth) {
int finalLeft = 0;
if (isSmooth) {
//开启平滑
if (mViewDragHelper.smoothSlideViewTo(mMainContent, finalLeft, 0)) {
//重绘界面
//invalidate();
ViewCompat.postInvalidateOnAnimation(this);
} else {
mMainContent.layout(finalLeft, 0, finalLeft + mWidth, mHeight);
}
}
}
@Override
public void computeScroll() {
super.computeScroll();
//维持动画
if (mViewDragHelper.continueSettling(true)) {
//重绘
ViewCompat.postInvalidateOnAnimation(this);
}
}
//9.加动画 回调
private void dispatchEvent() {
//获取 百分百 0.0f - 1.0f
float percent = mMainContent.getLeft() * 1.0f / mRange;
Status lastStatus = status;
//状态更新
if (percent == 0) {
status = Status.Close;
} else if (percent == 1) {
status = Status.Open;
} else {
status = Status.Draging;
}
//接口回调
if (mOnUpdataDragStateListener != null) {
mOnUpdataDragStateListener.onDragging(percent);
}
//
if (lastStatus != status && mOnUpdataDragStateListener != null) {
if (status == Status.Open) {
mOnUpdataDragStateListener.onOpen();
} else if (status == Status.Close) {
mOnUpdataDragStateListener.onClose();
}
}
//左面板 缩放 位移 透明的
//0.0f-1.0f ---0.5f-1.0f
//0.5f + percent * (0.5f);
mLeftContent.setScaleX(0.5f + percent * (0.5f));
mLeftContent.setScaleY(0.5f + percent * (0.5f));
//位移 evaluate(percent,-mw,0)
mLeftContent.setTranslationX(evaluate(percent, -mWidth * 0.5f, 0f));
//透明的evaluate(percent,0.2f,1.0f)
mLeftContent.setAlpha(evaluate(percent, 0.2f, 1.0f));
//主面板 缩放evaluate(percent,0.2f,1.0f)
mMainContent.setScaleY(evaluate(percent, 1.0f, 0.8f));
//背景亮度 滤波器Filter 估价,估值evaluate 门童; 搬运工人Porter欺骗; 把…改头换面;Duff
getBackground().setColorFilter((Integer) evaluateColor(percent, Color.BLACK, Color.TRANSPARENT), PorterDuff.Mode.SRC_OVER);
}
public Object evaluateColor(float fraction, Object startValue, Object endValue) {
int startInt = (Integer) startValue;
int startA = (startInt >> 24) & 0xff;
int startR = (startInt >> 16) & 0xff;
int startG = (startInt >> 8) & 0xff;
int startB = startInt & 0xff;
int endInt = (Integer) endValue;
int endA = (endInt >> 24) & 0xff;
int endR = (endInt >> 16) & 0xff;
int endG = (endInt >> 8) & 0xff;
int endB = endInt & 0xff;
return (int) ((startA + (int) (fraction * (endA - startA))) << 24) |
(int) ((startR + (int) (fraction * (endR - startR))) << 16) |
(int) ((startG + (int) (fraction * (endG - startG))) << 8) |
(int) ((startB + (int) (fraction * (endB - startB))));
}
public Float evaluate(float fraction, Number startValue, Number endValue) {
float startFloat = startValue.floatValue();
return startFloat + fraction * (endValue.floatValue() - startFloat);
}
}
3.MainActivity
public class MainActivity extends Activity
package com.guyulei.myqq50;
import android.animation.ValueAnimator;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.CycleInterpolator;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import java.util.Random;
import utils.MyToast;
public class MainActivity extends Activity {
private DragLayout mDragLayout;
private ListView mMainlistView;
private ListView mLeftlistView;
private ImageView mIvhead;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//主页面imag对象
mIvhead = (ImageView) findViewById(R.id.iv_head);
mDragLayout = (DragLayout) findViewById(R.id.dl_dragLayout);
mDragLayout.setOnUpdataDragStateListener(new DragLayout.OnUpdataDragStateListener() {
@Override
public void onOpen() {
MyToast.showToast(getApplicationContext(), "onOpen");
////面板打开时，左面板上的 listview 随机滑动到 0 到 50 间的某个位置
mLeftlistView.smoothScrollToPosition(new Random().nextInt(20));
}
@Override
public void onClose() {
MyToast.showToast(getApplicationContext(), "onClose");
ValueAnimator valueAnimator = ValueAnimator.ofFloat(0.0f, 10f);
valueAnimator.setDuration(1000);
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
float value = (float) animation.getAnimatedValue();
mIvhead.setTranslationX(value);
}
});
//动画插值器
valueAnimator.setInterpolator(new CycleInterpolator(3));
valueAnimator.start();
}
@Override
public void onDragging(float percent) {
MyToast.showToast(getApplicationContext(), "onDragging" + percent);
//percent 0.0f -> 1.0f => 1.0f -> 0.0f ==> 1-percent
mIvhead.setAlpha(1-percent);
}
});
//
mMainlistView = (ListView) findViewById(R.id.main_listView);
//main数据
String[] str_main = new String[]{"guyulei", "guyulei1", "guyulei2", "guyulei3", "guyulei4"
, "guyulei5", "guyulei6", "guyulei7", "guyulei8", "guyulei9", "guyulei10",
"guyulei", "guyulei1", "guyulei2", "guyulei3", "guyulei4"
, "guyulei5", "guyulei6", "guyulei7", "guyulei8", "guyulei9", "guyulei10",
"guyulei", "guyulei1", "guyulei2", "guyulei3", "guyulei4"
, "guyulei5", "guyulei6", "guyulei7", "guyulei8", "guyulei9", "guyulei10"};
//设置适配器：ArrayAdapter
mMainlistView.setAdapter(new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1, str_main) {
@Override
//重新getView 改变字体颜色
public View getView(int position, View convertView, ViewGroup parent) {
TextView view = (TextView) super.getView(position, convertView, parent);
view.setTextColor(Color.BLUE);
return view;
}
});
//
mLeftlistView = (ListView) findViewById(R.id.left_listView);
String[] str_left = new String[]{"顾雨磊", "顾雨磊1", "顾雨磊2", "顾雨磊3", "顾雨磊4"
, "顾雨磊5", "顾雨磊6", "顾雨磊7", "顾雨磊8", "顾雨磊9", "顾雨磊10", "顾雨磊11"
, "顾雨磊12", "顾雨磊13", "顾雨磊14", "顾雨磊15", "顾雨磊16", "顾雨磊17", "顾雨磊18"
, "顾雨磊19"};
mLeftlistView.setAdapter(new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1, str_left) {
@Override
public View getView(int position, View convertView, ViewGroup parent) {
TextView view = (TextView) super.getView(position, convertView, parent);
view.setTextColor(Color.BLACK);
return view;
}
});
}
}
时间： 2024-10-21 22:46:19