Android實現平滑翻動效果

本文實例為大家分享了Android實現平滑翻動效果的具體代碼，供大家參考，具體內容如下

效果

1.activity加implements

implements GestureDetector.OnGestureListener

2.

<ViewFlipperandroid: 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

@Override public boolean onTouchEvent(MotionEvent event) {return this.gestureDetector.onTouchEvent(event); } @Override public boolean onFling(MotionEvent arg0, MotionEvent arg1, float arg2, float arg3) {//對手指滑動的距離進行了計算，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; } @Override public boolean onDown(MotionEvent e) {return false; } @Override public void onShowPress(MotionEvent e) { } @Override public boolean onSingleTapUp(MotionEvent e) {return false; } @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {return false; } @Override public 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>

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持好吧啦網。