如何在对话框中处理后退按钮？

Question

我正在开发一个应用程序,当按下按钮时,它会打开一个带有确定和取消按钮的对话框.

它工作正常.

当用户按下后退按钮时,我按如下方式处理

public boolean onKeyDown(int keyCode, KeyEvent event) 
{
    if ((keyCode == KeyEvent.KEYCODE_BACK)) 
    {

    }
 return super.onKeyDown(keyCode, event);
}

但是没有调用上面的方法.我怎么处理这个？

Answer 1

dialog.setOnKeyListener(new Dialog.OnKeyListener() {

            @Override
            public boolean onKey(DialogInterface arg0, int keyCode,
                    KeyEvent event) {
                // TODO Auto-generated method stub
                if (keyCode == KeyEvent.KEYCODE_BACK) {
                    finish();
                    dialog.dismiss();
                }
                return true;
            }
        });

Answer 2

听起来好像你想在创建Dialog时设置OnCancelListener.它看起来像这样:

dialog.setOnCancelListener(new DialogInterface.OnCancelListener() {         
    @Override
    public void onCancel(DialogInterface dialog) {
        //do whatever you want the back key to do
    }
});

Answer 3

你需要覆盖OnCancel方法.此方法调用Back Key按下.这里的代码对我来说很完美.

 AlertDialog alertDialog;

    alertDialog.setOnCancelListener(new OnCancelListener() 
    {                   
           @Override
            public void onCancel(DialogInterface dialog) 
             {
               // TODO Auto-generated method stub

                    dialog.dismiss();                           

            }
}); 

希望这会对你有所帮助,如果对你有帮助就接受它.

谢谢..

Answer 4

试试这个

 new AlertDialog.Builder(this).setOnKeyListener(new DialogInterface.OnKeyListener() {

                        @Override
                        public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {

                            if(keyCode == KeyEvent.KEYCODE_BACK){
                                Logger.d(TAG, "--------- Do Something -----------");
                                return true;
                            }
                            return false;


                        }
                    })