package com.finddreams.slidingback.ui;   import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.GestureDetector; import android.view.GestureDetector.OnGestureListener; import android.view.MotionEvent; /**  * 手勢滑動的Activity，只需要繼承就可實現手勢滑動  * Title: GestureBackActivity.java  * @author Angus  * 2016年11月16日  * @version 2.0  */ public class GestureBackActivity extends Activity {  private GestureDetector myDectector;  private static final String TAG = "GestureBackActivity";  boolean flingFinishEnabled = true;   @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);   initGestureDetector();   AppManager.getAppManager().addActivity(this);  }   private void initGestureDetector() {   if (myDectector == null) {    myDectector = new GestureDetector(this, new MyGestureListener());   }   }   @Override  public boolean dispatchTouchEvent(MotionEvent ev) {    if (flingFinishEnabled) {    return myDectector.onTouchEvent(ev) || super.dispatchTouchEvent(ev);   }   return super.dispatchTouchEvent(ev);  }   /**   * 手勢監聽器   *   */  public class MyGestureListener implements OnGestureListener {    @Override   public boolean onDown(MotionEvent e) {    // Toast.makeText(getApplicationContext(),"down",Toast.LENGTH_SHORT).show();    return true;   }    @Override   public void onShowPress(MotionEvent e) {    // TODO Auto-generated method stub    }    @Override   public boolean onSingleTapUp(MotionEvent e) {    // Toast.makeText(getApplicationContext(),"onSingleTapUp",Toast.LENGTH_SHORT).show();    return true;   }    @Override   public boolean onScroll(MotionEvent e1, MotionEvent e2,     float distanceX, float distanceY) {    // TODO Auto-generated method stub    return false;   }    @Override   public void onLongPress(MotionEvent e) {    // TODO Auto-generated method stub    }    @Override   public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,     float velocityY) {    if (e1.getX() - e2.getX() > 100 && Math.abs(velocityX) > 0) {     Log.d(TAG, "向左滑動");    } else if (e2.getX() - e1.getX() > 100 && Math.abs(velocityX) > 0) {     Log.d(TAG, "向右滑動");     AppManager.getAppManager().finishActivity();    }    return false;   }   } }