Android防止按钮连续点击

public class Utils {
    private static long lastClickTime;
    public synchronized static boolean isFastClick() {
        long time = System.currentTimeMillis();   
        if ( time - lastClickTime < 500) {   
            return true;   
        }   
        lastClickTime = time;   
        return false;   
    }
}

@Override
public void onClick(View v) {
    if (Utils.isFastClick()) {
        return ;
    }
}