Android手勢識別ViewFlipper觸摸動畫

<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></pre>  ViewFlipper中包含了5張圖片  用來手勢切換。

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);
     //注冊一個用于手勢識別的類  
    mGestureDetector = new GestureDetector(this);  
    //給mFlipper設置一個listener  
    flipper.setOnTouchListener(this);  
    mCurrentLayoutState = 0;  
    //允許長按住ViewFlipper,這樣才能識別拖動等手勢  
    flipper.setLongClickable(true);  

}
/**  
 * 此方法在本例中未用到，可以指定跳轉到某個頁面  
 * @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();  
        }  

    }  

} 
/**  
 * 定義從右側進入的動畫效果  
 * @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;  
}  

/**  
 * 定義從左側退出的動畫效果  
 * @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;  
}  

/**  
 * 定義從左側進入的動畫效果  
 * @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;  
}  

/**  
 * 定義從右側退出時的動畫效果  
 * @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;
}
/*  
 * 用戶按下觸摸屏、快速移動后松開即觸發這個事件  
 * e1：第1個ACTION_DOWN MotionEvent  
 * e2：最后一個ACTION_MOVE MotionEvent  
 * velocityX：X軸上的移動速度，像素/秒  
 * velocityY：Y軸上的移動速度，像素/秒  
 * 觸發條件 ：  
 * X軸的坐標位移大于FLING_MIN_DISTANCE，且移動速度大于FLING_MIN_VELOCITY個像素/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) {  
            // 當像左側滑動的時候  
            //設置View進入屏幕時候使用的動畫  
            flipper.setInAnimation(inFromRightAnimation());  
            //設置View退出屏幕時候使用的動畫  
            flipper.setOutAnimation(outToLeftAnimation());  
            flipper.showNext();  
        } else if (e2.getX() - e1.getX() > FLING_MIN_DISTANCE  
                && Math.abs(velocityX) > FLING_MIN_VELOCITY) {  
            // 當像右側滑動的時候  
            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
      // 一定要將觸屏事件交給手勢識別類去處理（自己處理會很麻煩的）  
    return mGestureDetector.onTouchEvent(event);  
}



}</pre>這樣就OK了