MyGallery.java

package com.jwzhangjie.videoplayer.share;

import android.content.Context;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.widget.Gallery;

@SuppressWarnings("deprecation")
public class MyGallery extends Gallery {

	public MyGallery(Context context){
		super(context);
	}
	
	public MyGallery(Context context, AttributeSet attrs) {
		super(context, attrs);
	}
	
	private boolean isScrollingLeft(MotionEvent e1, MotionEvent e2) {  
	       return e2.getX() > e1.getX();  
	}  
	
	@Override
	public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
			float velocityY) {
		int keyCode;  
        if (isScrollingLeft(e1, e2)) {        
            keyCode = KeyEvent.KEYCODE_DPAD_LEFT;  
        } else {  
             keyCode = KeyEvent.KEYCODE_DPAD_RIGHT;  
        }  
        onKeyDown(keyCode, null);  
        return true;  
	}

}