Android ViewFlipper的简单使用

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:background="@android:color/holo_red_light"
 android:layout_width="match_parent"
 android:layout_height="match_parent">
</LinearLayout>

 //要添加的页面布局ID
 private int viewIds[] = {R.layout.item_view1, R.layout.item_view2, R.layout.item_view3, R.layout.item_view4};
 /**
 * 将页面添加进ViewFlipper
 */
 private void addViews() {
 View itemView;
 for (int viewId : viewIds) {
  itemView = View.inflate(this,viewId,null);
  viewFlipper.addView(itemView);
 }
 }

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
 <translate
 android:duration="500"
 android:fromXDelta="-100%p"
 android:toXDelta="0"/>
</set>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
 <translate
 android:duration="500"
 android:fromXDelta="0"
 android:toXDelta="-100%p"/>
</set>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
 <translate
 android:duration="500"
 android:fromXDelta="100%p"
 android:toXDelta="0"/>
</set>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
 <translate
 android:duration="500"
 android:fromXDelta="0"
 android:toXDelta="100%p"/>
</set>

android:inAnimation="@anim/left_in"
android:outAnimation="@anim/right_out"

 private float startX; //手指按下时的x坐标
 private float endX; //手指抬起时的x坐标
 private float moveX = 100f; //判断是否切换页面的标准值
 /**
 * 触摸监听事件
 * @param v
 * @param event
 * @return
 */
 @Override
 public boolean onTouch(View v, MotionEvent event) {
 switch (event.getAction()) {
  case MotionEvent.ACTION_DOWN:
  //手指按下时获取起始点坐标
  startX = event.getX();
  break;
  case MotionEvent.ACTION_UP:
  //手指抬起时获取结束点坐标
  endX = event.getX();
  //比较startX和endX，判断手指的滑动方向
  if (endX - startX > moveX) { //手指从左向右滑动
   viewFlipper.setInAnimation(this, R.anim.left_in);
   viewFlipper.setOutAnimation(this, R.anim.right_out);
   viewFlipper.showPrevious();
  } else if (startX - endX > moveX) { //手指向右向左滑动
   viewFlipper.setInAnimation(this, R.anim.right_in);
   viewFlipper.setOutAnimation(this, R.anim.left_out);
   viewFlipper.showNext();
  }
  break;
 }
 return true;
 }

 //创建手势监听器
 GestureDetector gestureDetector = new GestureDetector(this, new MyGestureListener());

 /**
 * 自定义手势监听类
 */
 class MyGestureListener extends GestureDetector.SimpleOnGestureListener{
 @Override
 public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
  if (e2.getX() - e1.getX() > moveX){
  viewFlipper.setInAnimation(MainActivity.this, R.anim.left_in);
  viewFlipper.setOutAnimation(MainActivity.this, R.anim.right_out);
  viewFlipper.showPrevious();
  } else if (e2.getX() - e1.getX() < moveX){
  viewFlipper.setInAnimation(MainActivity.this, R.anim.right_in);
  viewFlipper.setOutAnimation(MainActivity.this, R.anim.left_out);
  viewFlipper.showNext();
  }
  return true;
 }
 }

 @Override
 public boolean onTouch(View v, MotionEvent event) {
 gestureDetector.onTouchEvent(event);
 return true;
 }