android设立当前屏幕能不能锁屏

android设置当前屏幕能不能锁屏
//设置屏幕不能锁屏   
private void setUnlocked()
    {
        Window win = getWindow();
        WindowManager.LayoutParams winParams = win.getAttributes();
        winParams.flags |= (WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD
                | WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
                | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
                | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
        win.setAttributes(winParams);
    }

//设置屏幕可以锁屏，当然默认是也是可以锁屏的
  private void setLocked()
    {
        Window win = getWindow();
        WindowManager.LayoutParams winParams = win.getAttributes();
        winParams.flags &= (~WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD
                & ~WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
                & ~WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
                & ~WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
        win.setAttributes(winParams);
          }