模仿去哪儿的磁贴效果

感觉去哪儿的页面做的非常不错，非常好看，于是想模仿一下，其实实现还是很简单的，就是按下去的执行缩小动画，抬起的恢复正常状态，这种效果叫磁贴效果，顾名思义感觉就磁贴一样。下面我们来看看效果图：

下面我们来看看最重要的自定义代码：

package com.zqy.qunertext;

import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.animation.Animation;
import android.view.animation.ScaleAnimation;
import android.widget.FrameLayout;

/**
 *
 *
 * @author zqy
 *
 */
public class HomeMenuButton extends FrameLayout {
	private boolean isPressed;
	private ScaleAnimation zoomInAnimation;
	private ScaleAnimation zoomOutAnimation;

	public HomeMenuButton(Context context) {
		this(context,null);
	}

	public HomeMenuButton(Context context, AttributeSet attrs) {
		super(context, attrs);
		init();
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		super.onMeasure(widthMeasureSpec, heightMeasureSpec);
	}

	private void init() {
		/**
		 * 初始化动画
		 */
		zoomInAnimation = new ScaleAnimation(1f, 0.95f, 1f, 0.95f,Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,0.5f);
		zoomInAnimation.setFillAfter(true);
		zoomInAnimation.setDuration(200);
		zoomOutAnimation = new ScaleAnimation(0.95f, 1f, 0.95f, 1f,Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,0.5f);
		zoomOutAnimation.setFillAfter(true);
		zoomOutAnimation.setDuration(200);

	}

	@Override
	protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);
	}

	private void toNormalState() {
		isPressed = false;
		invalidate();
		startAnimation(zoomOutAnimation);
	}

	private boolean pointInView(float localX, float localY, float slop) {
		return localX >= -slop && localY >= -slop && localX < getWidth() + slop
				&& localY < getHeight() + slop;
	}

	@Override
	public boolean onTouchEvent(MotionEvent event) {
		switch (event.getAction()) {
		case MotionEvent.ACTION_DOWN:
			isPressed = true;//设置true
			invalidate();//重绘
			this.startAnimation(zoomInAnimation);//执行动画
			break;
		case MotionEvent.ACTION_UP:
			boolean needPerformClick = isPressed;
			toNormalState();//正常
			if (needPerformClick) {
				performClick();
			}
			break;

		case MotionEvent.ACTION_MOVE:
			final int x = (int) event.getX();
			final int y = (int) event.getY();
			if (!pointInView(x, y, 20)) {
				toNormalState();
			}
			break;

		case MotionEvent.ACTION_CANCEL:
		case MotionEvent.ACTION_OUTSIDE:
			toNormalState();
			break;
		}

		return true;

	}
}

上面代码晚上几乎就已经完成了：只有把自定义的代码写在XML里面就可以了：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:baselineAligned="false"
        android:orientation="horizontal" >

        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginBottom="8dp"
            android:layout_marginLeft="8dp"
            android:layout_marginTop="8dp"
            android:layout_weight="1"
            android:orientation="vertical" >

            <com.zqy.qunertext.HomeMenuButton
                android:id="@+id/hb_ad"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_weight="2"
                android:background="@drawable/icon_favoable" >
            </com.zqy.qunertext.HomeMenuButton>

            <com.zqy.qunertext.HomeMenuButton
                android:id="@+id/hb_order"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_marginTop="8dp"
                android:layout_weight="2"
                android:background="@drawable/icon_order" >
            </com.zqy.qunertext.HomeMenuButton>

            <com.zqy.qunertext.HomeMenuButton
                android:id="@+id/hb_cloud_manger"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_marginTop="8dp"
                android:layout_weight="1"
                android:background="@drawable/icon_favorable_manger" >
            </com.zqy.qunertext.HomeMenuButton>

            <com.zqy.qunertext.HomeMenuButton
                android:id="@+id/hb_setting"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_marginTop="8dp"
                android:layout_weight="1"
                android:background="@drawable/icon_setting" >
            </com.zqy.qunertext.HomeMenuButton>
        </LinearLayout>

        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginBottom="8dp"
            android:layout_marginLeft="8dp"
            android:layout_marginRight="8dp"
            android:layout_marginTop="8dp"
            android:layout_weight="1"
            android:orientation="vertical" >

            <com.zqy.qunertext.HomeMenuButton
                android:id="@+id/hb_goods_manager"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_weight="1"
                android:background="@drawable/icon_goods" >
            </com.zqy.qunertext.HomeMenuButton>

            <com.zqy.qunertext.HomeMenuButton
                android:id="@+id/hb_store_net"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_marginTop="8dp"
                android:layout_weight="2"
                android:background="@drawable/icon_store" >
            </com.zqy.qunertext.HomeMenuButton>

            <com.zqy.qunertext.HomeMenuButton
                android:id="@+id/hb_incoming"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_marginTop="8dp"
                android:layout_weight="2"
                android:background="@drawable/icon_money" >
            </com.zqy.qunertext.HomeMenuButton>

            <com.zqy.qunertext.HomeMenuButton
                android:id="@+id/hb_employee_manager"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_marginTop="8dp"
                android:layout_weight="1"
                android:background="@drawable/icon_manage" >
            </com.zqy.qunertext.HomeMenuButton>
        </LinearLayout>
    </LinearLayout>

</LinearLayout>

OK.大功告成。效果还可以：呵呵

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