public class MainActivity extends AppCompatActivity {

    private ViewFlipper flipper;

    //背景图片int[] id

    private int[] resID = {R.drawable.pic1,R.drawable.pic2,R.drawable.pic3,R.drawable.pic4};

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        flipper = (ViewFlipper) findViewById(R.id.flipper);

        //动态导入的方式为ViewFlipper加入子View

        for(int i = 0; i < resID.length ; i++){

            flipper.addView(getimageview(resID[i]));

        }

        //为ViewFlipper去添加动画效果

        flipper.setInAnimation(this,R.anim.right_in);

        flipper.setOutAnimation(this,R.anim.right_out);

        //切换间隔时间

        flipper.setFlipInterval(3000);

        //开始播放

        flipper.startFlipping();

    }

    private ImageView getimageview(int resID){

        ImageView image = new ImageView(this);

        image.setBackgroundResource(resID);

        return image;

    }

public class MainActivity extends AppCompatActivity {

    private ViewFlipper flipper;

    //X横坐标

    private float startX;

    //背景图片int[] id

    private int[] resID = {R.drawable.pic1,R.drawable.pic2,R.drawable.pic3,R.drawable.pic4};

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        flipper = (ViewFlipper) findViewById(R.id.flipper);

        //动态导入的方式为ViewFlipper加入子View

        for(int i = 0; i < resID.length ; i++){

            flipper.addView(getimageview(resID[i]));

        }

    }

    private ImageView getimageview(int resID){

        ImageView image = new ImageView(this);

        image.setBackgroundResource(resID);

        return image;

    }

    //手指滑动

    @Override

    public boolean onTouchEvent(MotionEvent event) {

       switch (event.getAction()){

           case MotionEvent.ACTION_DOWN:{

               startX = event.getX();

               break;

           }

           case MotionEvent.ACTION_MOVE:{

               //向右滑动

               break;

           }

           case MotionEvent.ACTION_UP:{

               if(event.getX() - startX  > 100){

                   flipper.setInAnimation(this,R.anim.left_in);

                   flipper.setOutAnimation(this, R.anim.left_out);

                   flipper.showPrevious();                  //显示前一项

               }

               //向左滑动

               if(startX - event.getX() > 100){

                   flipper.setInAnimation(this,R.anim.right_in);

                   flipper.setOutAnimation(this,R.anim.right_out);

                   flipper.showNext();

               }

               break;

           }

       }

        return super.onTouchEvent(event);

    }