<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
  <scale
    android:duration="1000"
    android:fromXScale="0.2"
    android:fromYScale="0.2"
    android:toYScale="1"
    android:toXScale="1"
    android:pivotX="50%"
    android:pivotY="50%"
    >
  </scale>
</set>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
  <scale
    android:duration="1000"
    android:fromXScale="1"
    android:fromYScale="1"
    android:toYScale="0.2"
    android:toXScale="0.2"
    android:pivotX="50%"
    android:pivotY="50%">
  </scale>
</set>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:id="@+id/activity_main"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical"
  tools:context="jzfp.gs.com.animationdemo.MainActivity">

  <android.support.v7.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:background="@color/colorPrimary"></android.support.v7.widget.Toolbar>

  <！--渐入动画 和 渐出动画定义-->
  <ViewFlipper
    android:id="@+id/vf"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:inAnimation="@anim/scalein"
    android:outAnimation="@anim/scaleout">

    <ImageView
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:background="@mipmap/one" />

    <ImageView
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:background="@mipmap/two" />


    <ImageView
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:background="@mipmap/three" />

  </ViewFlipper>

</LinearLayout>

public class MainActivity extends AppCompatActivity {

  private ViewFlipper viewFlipper = null;
  float PosX = 0, CurrentX = 0;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    toolbar.setNavigationIcon(R.drawable.left);
    setSupportActionBar(toolbar);//设置ActionBar

    viewFlipper = (ViewFlipper) findViewById(R.id.vf);
  }

  @Override
  public boolean onTouchEvent(MotionEvent event) {
    switch (event.getAction()) {
      case MotionEvent.ACTION_DOWN:
        PosX = event.getX();
        break;
      case MotionEvent.ACTION_MOVE:
        CurrentX = event.getX();
        break;
      case MotionEvent.ACTION_UP:
        if (CurrentX - PosX > 25.0) {//向右滑动切换到上一页
          viewFlipper.showPrevious();
        } else if (CurrentX - PosX < -25.0) {//向左滑动，切换到下一页
          viewFlipper.showNext();
        }
    }
    return true;
  }
}