AndroidViewFlipper的详解及实例

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  <！--渐入动画 和 渐出动画定义-->
  

    

    


    

  

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;
  }
}