Android編程實現左右滑動切換背景的方法

本文實例講述了Android編程實現左右滑動切換背景的方法。分享給大家供大家參考，具體如下：

最近想做一個左右滑動切換背景圖片的應用，特地將自己的研究分享一下：

這個需要繼承2個監聽接口 OnGestureListener,  OnTouchListener

關於這2個接口大家可以在網上查一下

同時需要設置2個屬性

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

並且在這個函數中有如下這幾句話

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

附送代碼：

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) {
    // 處理左右滑動
    if (e1.getX() - e2.getX() > 100) { // 向左滑動
      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) { // 向右滑動
      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);
  }
}

更多關於Android圖片與特效相關內容感興趣的讀者可查看本站專題：《Android開發動畫技巧匯總》和《Android圖形與圖像處理技巧總結》

希望本文所述對大家Android程序設計有所幫助。