返回键退出事件

返回退出事件确认

/**
     * 退出程序
     * 
     * @param context
     */
    public static void QuitHintDialog(final Context context)
    {
        new AlertDialog.Builder(context).setMessage("确定退出当前程序？").setTitle("当前程序").setIcon(R.drawable.ic_launcher).setPositiveButton("退出", new DialogInterface.OnClickListener()
        {

            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                try
                {
                    ((Activity) context).finish();
                }
                catch (Exception e)
                {
                    Log.e("close", "close error");
                }
            }
        }).setNegativeButton("取消", new DialogInterface.OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
            }
        }).create().show();
    }