我怎么能把＆＃34;你确定要退出吗？＆＃34;当我按下按钮android

Question

我想发一条消息＆＃34;你确定要退出吗？＆＃34;和＆＃34;是＆＃34; - ＆＃34;不＆＃34;从我的应用程序中按下＆＃34; BACK＆＃34;按钮......有可能吗？我怎么办呢？感谢

Answer 1

是的，通过反击您的活动，可以通过alertdialog

@Override
public void onBackPressed() {
    new AlertDialog.Builder(this)
           .setMessage("Are you sure you want to exit?")
           .setCancelable(false)
           .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int id) {
                    ExampleActivity.this.finish();
               }
           })
           .setNegativeButton("No", null)
           .show();
}

Answer 2

@Override
public void onBackPressed() {
    new AlertDialog.Builder(this)
        .setTitle("Really Exit?")
        .setMessage("Are you sure you want to exit?")
        .setNegativeButton(android.R.string.no, null)
        .setPositiveButton(android.R.string.yes, new OnClickListener() {

            public void onClick(DialogInterface arg0, int arg1) {
                WelcomeActivity.super.onBackPressed();
            }
        }).create().show();
}

取自this回答。

Answer 3

在

中添加用于提醒对话的代码段

@Override
    public void onBackPressed() {
    final AlertDialog alert = new AlertDialog.Builder(new ContextThemeWrapper(contextForAlert,R.style.CustomAlertDialogue)).create();
    alert.setTitle(title);
    alert.setMessage(message);
    alert.setIcon(R.drawable.warning_icon);
    alert.setCancelable(false);
    alert.setCanceledOnTouchOutside(false);
    alert.setButton(DialogInterface.BUTTON_POSITIVE, "OK", new DialogInterface.OnClickListener() {

    public void onClick(DialogInterface dialog, int which) {



    }
    });


    alert.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {

            alert.dismiss();    

         }
        });



    alert.setOnCancelListener(new DialogInterface.OnCancelListener() {

            @Override
            public void onCancel(DialogInterface dialog) {


            }
        });

    alert.show();
    }