Gesturedetector (gesture recognition)

android Provide a for gesture recognition GestureDetector, When creating a GestureDetector.OnGestureListener Listen to the instance

by Activity Or component specific TouchEvent Bind listener

by Activity Bind instance

 public class MainActivity extends Activity implements OnGestureListener{
	GestureDetector detector;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		detector=new GestureDetector(this, this);
		

	}
	@Override
		public boolean onTouchEvent(MotionEvent event) {
			// TODO Auto-generated method stub
			return detector.onTouchEvent(event);
		}
@Override
public boolean onDown(MotionEvent arg0) {
	// TODO Auto-generated method stub
	Toast.makeText(MainActivity.this, "onDown", Toast.LENGTH_SHORT).show();
	return false;
}
@Override
public boolean onFling(MotionEvent arg0, MotionEvent arg1, float arg2,
		float arg3) {
	// TODO Auto-generated method stub
	Toast.makeText(MainActivity.this, "onFling", Toast.LENGTH_SHORT).show();
	return false;
}
@Override
public void onLongPress(MotionEvent arg0) {
	// TODO Auto-generated method stub
	Toast.makeText(MainActivity.this, "onLongPress", Toast.LENGTH_SHORT).show();
}
@Override
public boolean onScroll(MotionEvent arg0, MotionEvent arg1, float arg2,
		float arg3) {
	// TODO Auto-generated method stub
	Toast.makeText(MainActivity.this, "onScroll", Toast.LENGTH_SHORT).show();
	return false;
}
@Override
public void onShowPress(MotionEvent arg0) {
	// TODO Auto-generated method stub
	Toast.makeText(MainActivity.this, "onShowPress", Toast.LENGTH_SHORT).show();
	
}
@Override
public boolean onSingleTapUp(MotionEvent arg0) {
	// TODO Auto-generated method stub
	Toast.makeText(MainActivity.this, "onSingleTapUp", Toast.LENGTH_SHORT).show();
	return false;
}


}

Bind instances for specific components

public class MainActivity extends ActionBarActivity {
	ImageView image;
	GestureDetector detector;
	class myOnGestureListener extends SimpleOnGestureListener{
		@Override
		public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
				float velocityY) {
			// TODO Auto-generated method stub
			//
			if(e1.getX()-e2.getX()>50)
			{
				Toast.makeText(MainActivity.this, " Fingers to the left ", Toast.LENGTH_SHORT).show();
			}else if(e2.getX()-e1.getX()>50)
			{
				Toast.makeText(MainActivity.this, " Fingers to the right ", Toast.LENGTH_SHORT).show();
			}
			return super.onFling(e1, e2, velocityX, velocityY);
		}
	}
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		image=(ImageView) findViewById(R.id.image);
		
		detector=new GestureDetector(new myOnGestureListener());
		image.setOnTouchListener(new OnTouchListener() {
			
			@Override
			// It can be captured that touch is happening Event event 
			public boolean onTouch(View arg0, MotionEvent event) {
				// TODO Auto-generated method stub
				detector.onTouchEvent(event);//detector Put the event event Forward to OnGestureListener Handle 
				return true;
			}
		});
	}

}