android 使用viewflipper实现左右滑动的效果

public class MainActivity extends Activity implements OnGestureListener {
    
    private static final String TAG = "MainActivity";
    
    private ViewFlipper viewFlipper;
    private GestureDetector detector; //手势检测

    Animation leftInAnimation;
    Animation leftOutAnimation;
    Animation rightInAnimation;
    Animation rightOutAnimation;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_main);
        
        viewFlipper = (ViewFlipper)findViewById(R.id.viewFlipper);
        detector = new GestureDetector(this);
        
        //往viewFlipper添加View
        viewFlipper.addView(getImageView(R.drawable.new_feature_1));
        viewFlipper.addView(getImageView(R.drawable.new_feature_2));
        viewFlipper.addView(getImageView(R.drawable.new_feature_3));
        viewFlipper.addView(getImageView(R.drawable.new_feature_4));
        viewFlipper.addView(getImageView(R.drawable.new_feature_5));
        viewFlipper.addView(getImageView(R.drawable.new_feature_6));
        
        //动画效果
        leftInAnimation = AnimationUtils.loadAnimation(this, R.anim.left_in);
        leftOutAnimation = AnimationUtils.loadAnimation(this, R.anim.left_out);
        rightInAnimation = AnimationUtils.loadAnimation(this, R.anim.right_in);
        rightOutAnimation = AnimationUtils.loadAnimation(this, R.anim.right_out);
    }

    private ImageView getImageView(int id){
        ImageView imageView = new ImageView(this);
        imageView.setImageResource(id);
        return imageView;
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        return this.detector.onTouchEvent(event); //touch事件交给手势处理。
    }
    
    @Override
    public boolean onDown(MotionEvent e) {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
            float velocityY) {
        Log.i(TAG, "e1="+e1.getX()+" e2="+e2.getX()+" e1-e2="+(e1.getX()-e2.getX()));
        
        if(e1.getX()-e2.getX()>120){
            viewFlipper.setInAnimation(leftInAnimation);
            viewFlipper.setOutAnimation(leftOutAnimation);
            viewFlipper.showNext();//向右滑动
            return true;
        }else if(e1.getX()-e2.getY()<-120){
            viewFlipper.setInAnimation(rightInAnimation);
            viewFlipper.setOutAnimation(rightOutAnimation);
            viewFlipper.showPrevious();//向左滑动
            return true;
        }
        return false;
    }

    @Override
    public void onLongPress(MotionEvent e) {
        // TODO Auto-generated method stub
        
    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
            float distanceY) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public void onShowPress(MotionEvent e) {
        // TODO Auto-generated method stub
        
    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        // TODO Auto-generated method stub
        return false;
    }
    
    
}

布局文件如下：

<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/viewFlipper"
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       ></ViewFlipper>

</RelativeLayout>

效果图如下：

总体上效果和viewpager一致，好处是不用考虑viewpager的预加载情况，不好的一点是没有viewpager页面切换过程中的动画效果

动画效果布局如下：

 left_in.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate 
        android:fromXDelta="100%p"
        android:toXDelta="0"
        android:duration="600"
        />
    <alpha 
        android:fromAlpha="0.1"
        android:toAlpha="1.0"
        android:duration="600"
        />

</set>

left_out.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate 
        android:fromXDelta="0"
        android:toXDelta="-100%p"
        android:duration="600"
        />
    <alpha 
        android:fromAlpha="1.0"
        android:toAlpha="0.1"
        android:duration="600"
        />

</set>

right_in.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate 
        android:fromXDelta="-100%p"
        android:toXDelta="0"
        android:duration="600"
        />
    <alpha 
        android:fromAlpha="0.1"
        android:toAlpha="1.0"
        android:duration="600"
        />

</set>

right_out.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate 
        android:fromXDelta="0"
        android:toXDelta="100%p"
        android:duration="600"
        />
    <alpha 
        android:fromAlpha="1.0"
        android:toAlpha="0.1"
        android:duration="600"
        />

</set>