详谈OnTouchListener与OnGestureListener的区别

public class MainActivity extends Activity implements OnTouchListener {
	public void onCreate(Bundle outState) {
  	super.onCreate(outState);
  	setContentView(R.layout.main);
  	TextView tv = (TextView) findViewById(R.id.tv);
  	tv.setOnTouchListener(this);
  }

  public boolean onTouch(View v, MotionEvent event) {
  	Toast.makeText(this, "Touch Touch", Toast.LENGTH_SHORT).show();
		return false ; 
  }
}

public class MainActivity extends Activity implements OnTouchListener, OnGestureListener {
	private GestureDetector mGestureDetector; 

	public void onCreate(Bundle outState) {
  	super.onCreate(outState);
  	setContentView(R.layout.main);

  	mGestureDetector = new GestureDetector(this);
  	TextView tv = (TextView) findViewById(R.id.tv);
  	tv.setOnTouchListener(this);
  }

  public boolean onTouch(View v, MotionEvent event) {
  	return mGestureDetector.onTouchEvent(event);
  }

  // 用户轻触触摸屏，由1个MotionEvent ACTION_DOWN触发 
  public boolean onDown(MotionEvent arg0) {
		Log.i("MyGesture", "onDown");
		Toast.makeText(this, "onDown", Toast.LENGTH_SHORT).show();   
		return true;
	}

	// 用户轻触触摸屏，尚未松开或拖动，由一个1个MotionEvent ACTION_DOWN触发, 注意和onDown()的区别，强调的是没有松开或者拖动的状态
	public void onShowPress(MotionEvent e) {
		Log.i("MyGesture", "onShowPress");      
		Toast.makeText(this, "onShowPress", Toast.LENGTH_SHORT).show();
	}

	// 用户（轻触触摸屏后）松开，由一个1个MotionEvent ACTION_UP触发

	public  boolean onSingleTapUp(MotionEvent e) {
		Log.i("MyGesture", "onSingleTapUp");
		Toast.makeText(this, "onSingleTapUp", Toast.LENGTH_SHORT).show();
		return true;
	}

	// 用户按下触摸屏、快速移动后松开，由1个MotionEvent ACTION_DOWN, 多个ACTION_MOVE, 1个ACTION_UP触发    

	public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {  
		Log.i("MyGesture", "onFling");
		Toast.makeText(this, "onFling", Toast.LENGTH_LONG).show();   
		return true;
	}

 	// 用户按下触摸屏，并拖动，由1个MotionEvent ACTION_DOWN, 多个ACTION_MOVE触发

	public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {      
		Log.i("MyGesture", "onScroll");
 		Toast.makeText(this, "onScroll", Toast.LENGTH_LONG).show();
		return true;
 	}

 	// 用户长按触摸屏，由多个MotionEvent ACTION_DOWN触发

	public  void onLongPress(MotionEvent e) {
		Log.i("MyGesture", "onLongPress");
		Toast.makeText(this, "onLongPress", Toast.LENGTH_LONG).show();
 	}
}