Android的提示一个AlertDialog onBack pressed [英] Android Prompting an AlertDialog onBackPressed

问题描述

我试图完成了我的主菜单我的应用程序。我认为这将是一个简单的很好的接触在OnBack pressed方法添加一个AlertDialog。但是由于某种原因，我收到各种错误。

I am trying to finish up my main menu in my application. I thought it would be a simple nice touch to add an AlertDialog in the OnBackPressed method. However for some reason I am getting all kinds of errors.

我创建的AlertDialog在pssed的OnBack $ P $，并显示它，但应用程序只是关闭时我preSS后退按钮和我得到的错误说，窗口泄漏。

I created the AlertDialog in the OnBackPressed and show it but the app just closes when I press the back button and I get errors saying that the window is leaking.

不知道如何解决这一问题？我搜索了大约30分钟，但没有找到任何人有这个问题。

Any idea how to fix this? I searched for about 30 minutes and couldn't find anyone else with this problem.

推荐答案

尽量不叫 super.OnBack pressed（），这code建议立即进行删除帮助：

Try to not call super.OnBackPressed(), this code shoul help:

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

}

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