java - 无法让 Android 应用程序退出

Question

我正在努力让我的 Android 应用程序通过警报对话框退出。

点击"is"再次播放效果很好，因为它会重新启动应用程序，您可以再次播放。

不幸的是，当我点击“否”时，它只是删除了对话框警告框，我不知道为什么。

非常感谢任何帮助。

谢谢

@Override
       public void onClick(View v) {
           AlertDialog.Builder alert = new    AlertDialog.Builder(Task1Activity.this);
           alert.setMessage("You have guessed incorrectly three times. " +
               "The answer was " + ranNum + ". " + "Would you like to play again?")
                   .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
    public void onClick(DialogInterface dialog, int which) {

    Intent i = new Intent(Task1Activity.this, Task1Activity.class);
    startActivity(i);

    }
});

alert
.setCancelable(false)
.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Task1Activity.this.finish();
};
)
    .setTitle("Unlucky!")
    .create();

Answer 1

您正在创建 Activity Intent i = new Intent(Task1Activity.this, Task1Activity.class);，它将 Activity 添加到堆栈上。

试试这段代码:

 final AlertDialog.Builder alertDialog = new AlertDialog.Builder(
        Task1Activity.this);
alertDialog.setTitle("Unlucky!");
alertDialog.setCancelable(false)
alertDialog.setMessage("You have guessed incorrectly three times. " +
           "The answer was " + ranNum + ". " + "Would you like to play again?");
alertDialog.setPositiveButton("YES",
        new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i)        {
                 Intent i = new Intent(Task1Activity.this, Task1Activity.class);
                 i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
                startActivity(i);
            }
        });
alertDialog.setNegativeButton("NO",
        new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                alertDialog.dismiss();   
                //getActivity().finish();
                finishAffinity();   //finish all previous activity on stack
            }
        });
alertDialog.show();