效果

1.activity加implements

implements GestureDetector.OnGestureListener

2.

<ViewFlipperandroid:id="@+id/mars_bg"android:layout_width="match_parent"android:layout_height="match_parent" />

3.

private GestureDetector gestureDetector = null; private ViewFlipper marsBg; private int[] imageID = {R.drawable.bg_ast1, R.drawable.bg_main, R.drawable.bg_home};

4.oncreat中

// 生成GestureDetector對象，用于檢測手勢事件gestureDetector = new GestureDetector(this);// 添加用于切換的圖片for (int value : imageID) {// 定義一個(gè)ImageView對象ImageView image = new ImageView(this);image.setImageResource(value);// 充滿父控件image.setScaleType(ImageView.ScaleType.FIT_XY);// 添加到viewFlipper中marsBg.addView(image, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));}

5.重寫繼承的方法

@Overridepublic boolean onTouchEvent(MotionEvent event) {return this.gestureDetector.onTouchEvent(event);}@Overridepublic boolean onFling(MotionEvent arg0, MotionEvent arg1, float arg2, float arg3) {//對手指滑動的距離進(jìn)行了計(jì)算，如果滑動距離大于120像素，就做切換動作，否則不做任何切換動作。// 從左向右滑動if (arg0.getX() - arg1.getX() > 120) {// 添加動畫this.marsBg.setInAnimation(AnimationUtils.loadAnimation(this,R.anim.push_left_in));this.marsBg.setOutAnimation(AnimationUtils.loadAnimation(this,R.anim.push_left_out));this.marsBg.showNext();return true;}// 從右向左滑動else if (arg0.getX() - arg1.getX() < -120) {this.marsBg.setInAnimation(AnimationUtils.loadAnimation(this,R.anim.push_right_in));this.marsBg.setOutAnimation(AnimationUtils.loadAnimation(this,R.anim.push_right_out));this.marsBg.showPrevious();return true;}return true;}@Overridepublic boolean onDown(MotionEvent e) {return false;}@Overridepublic void onShowPress(MotionEvent e) {}@Overridepublic boolean onSingleTapUp(MotionEvent e) {return false;}@Overridepublic boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {return false;}@Overridepublic void onLongPress(MotionEvent e) {}

6.anim

push_left_in.xml

<set xmlns:android="http://schemas.android.com/apk/res/android"><translate android:fromXDelta="100%p" android:toXDelta="0"android:duration="500" /><alpha android:fromAlpha="0.1" android:toAlpha="1.0"android:duration="500" /> </set>

push_left_out.xml

<set xmlns:android="http://schemas.android.com/apk/res/android"><translate android:fromXDelta="0" android:toXDelta="-100%p"android:duration="500" /><alpha android:fromAlpha="1.0" android:toAlpha="0.1"android:duration="500" /> </set>

push_right_in.xml

<set xmlns:android="http://schemas.android.com/apk/res/android"><translate android:fromXDelta="-100%p" android:toXDelta="0"android:duration="500" /><alpha android:fromAlpha="0.1" android:toAlpha="1.0"android:duration="500" /> </set>

push_right_out.xml

<set xmlns:android="http://schemas.android.com/apk/res/android"><translate android:fromXDelta="0" android:toXDelta="100%p"android:duration="500" /><alpha android:fromAlpha="1.0" android:toAlpha="0.1"android:duration="500" /> </set>

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