Android手势识别ViewFlipper触摸动画

最近项目中用到了ViewFlipper这个类，感觉效果真的很炫，今天自己也试着做了下，确实还不错。

首先在layout下定义viewflipper.xml

<?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" >

    <ViewFlipper
        android:id="@+id/viewFlipper1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <ImageView
            android:id="@+id/imageView1"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:src="@drawable/b" />
         <ImageView
            android:id="@+id/imageView2"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:src="@drawable/c" />
          <ImageView
            android:id="@+id/imageView3"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:src="@drawable/d" />
          <ImageView
            android:id="@+id/imageView4"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:src="@drawable/f" />
         <ImageView
            android:id="@+id/imageView5"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:src="@drawable/g" />
    </ViewFlipper>

</LinearLayout>

ViewFlipper中包含了5张图片 用来手势切换。

public class ViewFlipperActivity extends Activity implements OnTouchListener, android.view.GestureDetector.OnGestureListener {
    private ViewFlipper flipper;
    GestureDetector mGestureDetector;  
    private int mCurrentLayoutState;  
    private static final int FLING_MIN_DISTANCE = 80;  
    private static final int FLING_MIN_VELOCITY = 150;  
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.viewflipper);
		
		flipper=(ViewFlipper) this.findViewById(R.id.viewFlipper1);
		 //注册一个用于手势识别的类  
        mGestureDetector = new GestureDetector(this);  
        //给mFlipper设置一个listener  
        flipper.setOnTouchListener(this);  
        mCurrentLayoutState = 0;  
        //允许长按住ViewFlipper,这样才能识别拖动等手势  
        flipper.setLongClickable(true);  
        
	}
	/**  
     * 此方法在本例中未用到，可以指定跳转到某个页面  
     * @param switchTo  
     */  
    public void switchLayoutStateTo(int switchTo) {  
        while (mCurrentLayoutState != switchTo)   {  
            if (mCurrentLayoutState > switchTo) {  
                mCurrentLayoutState--;  
                flipper.setInAnimation(inFromLeftAnimation());  
                flipper.setOutAnimation(outToRightAnimation());  
                flipper.showPrevious();  
            } else {  
                mCurrentLayoutState++;  
                flipper.setInAnimation(inFromRightAnimation());  
                flipper.setOutAnimation(outToLeftAnimation());  
                flipper.showNext();  
            }  
   
        }  
 
    } 
    /**  
     * 定义从右侧进入的动画效果  
     * @return  
     */  
    protected Animation inFromRightAnimation() {  
        Animation inFromRight = new TranslateAnimation(  
                Animation.RELATIVE_TO_PARENT, +1.0f,  
                Animation.RELATIVE_TO_PARENT, 0.0f,  
                Animation.RELATIVE_TO_PARENT, 0.0f,  
                Animation.RELATIVE_TO_PARENT, 0.0f);  
        inFromRight.setDuration(200);  
        inFromRight.setInterpolator(new AccelerateInterpolator());  
        return inFromRight;  
    }  
   
    /**  
     * 定义从左侧退出的动画效果  
     * @return  
     */  
    protected Animation outToLeftAnimation() {  
        Animation outtoLeft = new TranslateAnimation(  
                Animation.RELATIVE_TO_PARENT, 0.0f,  
                Animation.RELATIVE_TO_PARENT, -1.0f,  
                Animation.RELATIVE_TO_PARENT, 0.0f,  
                Animation.RELATIVE_TO_PARENT, 0.0f);  
        outtoLeft.setDuration(200);  
        outtoLeft.setInterpolator(new AccelerateInterpolator());  
        return outtoLeft;  
    }  
   
    /**  
     * 定义从左侧进入的动画效果  
     * @return  
     */  
    protected Animation inFromLeftAnimation() {  
        Animation inFromLeft = new TranslateAnimation(  
                Animation.RELATIVE_TO_PARENT, -1.0f,  
                Animation.RELATIVE_TO_PARENT, 0.0f,  
                Animation.RELATIVE_TO_PARENT, 0.0f,  
                Animation.RELATIVE_TO_PARENT, 0.0f);  
        inFromLeft.setDuration(200);  
        inFromLeft.setInterpolator(new AccelerateInterpolator());  
        return inFromLeft;  
    }  
    
    /**  
     * 定义从右侧退出时的动画效果  
     * @return  
     */  
    protected Animation outToRightAnimation() {  
        Animation outtoRight = new TranslateAnimation(  
                Animation.RELATIVE_TO_PARENT, 0.0f,  
                Animation.RELATIVE_TO_PARENT, +1.0f,  
                Animation.RELATIVE_TO_PARENT, 0.0f,  
                Animation.RELATIVE_TO_PARENT, 0.0f);  
        outtoRight.setDuration(200);  
        outtoRight.setInterpolator(new AccelerateInterpolator());  
        return outtoRight;  
    }  
    
	public boolean onDown(MotionEvent e) {
		// TODO Auto-generated method stub
		return false;
	}
	/*  
     * 用户按下触摸屏、快速移动后松开即触发这个事件  
     * e1：第1个ACTION_DOWN MotionEvent  
     * e2：最后一个ACTION_MOVE MotionEvent  
     * velocityX：X轴上的移动速度，像素/秒  
     * velocityY：Y轴上的移动速度，像素/秒  
     * 触发条件 ：  
     * X轴的坐标位移大于FLING_MIN_DISTANCE，且移动速度大于FLING_MIN_VELOCITY个像素/秒  
     */
	public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
			float velocityY) {
		 if (e1.getX() - e2.getX() > FLING_MIN_DISTANCE  
	                && Math.abs(velocityX) > FLING_MIN_VELOCITY) {  
	            // 当像左侧滑动的时候  
	            //设置View进入屏幕时候使用的动画  
	            flipper.setInAnimation(inFromRightAnimation());  
	            //设置View退出屏幕时候使用的动画  
	            flipper.setOutAnimation(outToLeftAnimation());  
	            flipper.showNext();  
	        } else if (e2.getX() - e1.getX() > FLING_MIN_DISTANCE  
	                && Math.abs(velocityX) > FLING_MIN_VELOCITY) {  
	            // 当像右侧滑动的时候  
	            flipper.setInAnimation(inFromLeftAnimation());  
	            flipper.setOutAnimation(outToRightAnimation());  
	            flipper.showPrevious();  
	        }  
	        return false;  
	}
	public void onLongPress(MotionEvent e) {
		// TODO Auto-generated method stub
		
	}
	public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
			float distanceY) {
		// TODO Auto-generated method stub
		return false;
	}
	public void onShowPress(MotionEvent e) {
		// TODO Auto-generated method stub
		
	}
	public boolean onSingleTapUp(MotionEvent e) {
		// TODO Auto-generated method stub
		return false;
	}
	public boolean onTouch(View v, MotionEvent event) {
		// TODO Auto-generated method stub
		  // 一定要将触屏事件交给手势识别类去处理（自己处理会很麻烦的）  
        return mGestureDetector.onTouchEvent(event);  
	}
	
	
}

这样就OK了 看下效果

因为是手势识别效果不太好演示，所以大家自己实现了以后就可以看到效果啦！