Android programming to achieve the left and right sliding switch background method

This article describes the Android programming to achieve the left and right sliding switch background method. To share with you for your reference, as follows:

Recently I want to do a sliding switch background image application, especially to share their own research 1:

This needs to inherit two listening interfaces, OnGestureListener, OnTouchListener

About these 2 interfaces you can check 1 on the Internet

Two properties need to be set at the same time

bgLayout.setOnTouchListener(this);
bgLayout.setLongClickable(true);

And in this function there are the following sentences

public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
return this.mGesture.onTouchEvent(event);
}

Attached code:

public class SwitcherActivity extends Activity implements OnGestureListener,
    OnTouchListener {
  /** Called when the activity is first created. */
  LinearLayout bgLayout = null;
  private GestureDetector mGesture = null;
  private int flag = 3;
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    mGesture = new GestureDetector(this);
    bgLayout = (LinearLayout) findViewById(R.id.bg);
    bgLayout.setBackgroundResource(R.drawable.bg3);
    bgLayout.setOnTouchListener(this);
    bgLayout.setLongClickable(true);
  }
  public boolean onDown(MotionEvent e) {
    // TODO Auto-generated method stub
    return false;
  }
  public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
      float velocityY) {
    //  Handling left and right sliding 
    if (e1.getX() - e2.getX() > 100) { //  Scroll left 
      if (flag == 3) {
        bgLayout.setBackgroundResource(R.drawable.bg4);
        flag = 4;
        return true;
      }
      if (flag == 4) {
        bgLayout.setBackgroundResource(R.drawable.bg5);
        flag = 5;
        return true;
      }
      if (flag == 1) {
        bgLayout.setBackgroundResource(R.drawable.bg2);
        flag = 2;
        return true;
      }
      if (flag == 2) {
        bgLayout.setBackgroundResource(R.drawable.bg3);
        flag = 3;
        return true;
      }
    } else if (e1.getX() - e2.getX() < -100) { //  Slide to the right 
      if (flag == 3) {
        bgLayout.setBackgroundResource(R.drawable.bg2);
        flag = 2;
        return true;
      }
      if (flag == 2) {
        bgLayout.setBackgroundResource(R.drawable.bg1);
        flag = 1;
        return true;
      }
      if (flag == 5) {
        bgLayout.setBackgroundResource(R.drawable.bg4);
        flag = 4;
        return true;
      }
      if (flag == 4) {
        bgLayout.setBackgroundResource(R.drawable.bg3);
        flag = 3;
        return true;
      }
    }
    return false;
  }
  public void onLongPress(MotionEvent e) {
    // TODO Auto-generated method stub
  }
  public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
      float distanceY) {
    // TODO Auto-generated method stub
    return false;
  }
  public void onShowPress(MotionEvent e) {
    // TODO Auto-generated method stub
  }
  public boolean onSingleTapUp(MotionEvent e) {
    // TODO Auto-generated method stub
    return false;
  }
  public boolean onTouch(View v, MotionEvent event) {
    // TODO Auto-generated method stub
    return this.mGesture.onTouchEvent(event);
  }
}

For more information on Android graphics and special effects, you can check out Android Animation Development Tips and Android Graphics and Image Processing Tips.

I hope this article is helpful to Android program design.