问后退按钮的确定/取消对话框

EN

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {



    if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {  
           AlertDialog.Builder alt_bld = new AlertDialog.Builder(this);
            alt_bld.setMessage("Are you sure you want to exit?")
            .setCancelable(false)
            .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                // Action for 'Yes' Button



                }
            })
            .setNegativeButton("No", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                //  Action for 'NO' Button

                    dialog.cancel();
                }
            });
            AlertDialog alert = alt_bld.create();
            // Title for AlertDialog
            alert.setTitle("Exit Game?");
            // Icon for AlertDialog
            alert.setIcon(R.drawable.icon);
            alert.show();


    return true;
    }

    return super.onKeyDown(keyCode, event);
}