如何从 AlertDialog 获取结果? [英] How can I get the results from an AlertDialog?

问题描述

我正在使用 AlertDialog.Builder 显示一个对话框以提示用户输入密码，然后我想将该密码保存在首选项中，但是我不知道如何从警报对话框中获取结果输入法.

I am using an AlertDialog.Builder to display a dialog to prompt the user to enter a password, I then want to save that password in a preference, however I can't figure out how to get the result from the alert dialog's input method.

这基本上是我想做的事情:

Here is essentially what I would like to be able to do:

    String result;
    AlertDialog.Builder b = new AlertDialog.Builder(this);
    b.setTitle("Please enter a password");
    final EditText input = new EditText(this);
    b.setView(input);
    b.setPositiveButton("OK", new DialogInterface.OnClickListener()
    {
        @Override
        public void onClick(DialogInterface dialog, int whichButton)
        {
           //I get a compile error here, it wants result to be final.
           result = input.getText().toString();
        }
    });
    b.setNegativeButton("CANCEL", null);
    b.create().show();

但是，我愿意做诸如 showDialog(int); 之类的事情，然后使用 onCreateDialog(int) 方法并以某种方式设置结果并以某种方式接收它其他方法，但我不知道如何进行最后一部分.

However, I am open to doing something such as showDialog(int); then using the onCreateDialog(int) method and somehow setting the result and receiving it in some other method, but I have no idea how to go about the last part.

推荐答案

public class MyActivity extends Activity {
    private String result;

    void showDialog() {
        AlertDialog.Builder b = new AlertDialog.Builder(this);
        b.setTitle("Please enter a password");
        final EditText input = new EditText(this);
        b.setView(input);
        b.setPositiveButton("OK", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int whichButton) {
                result = input.getText().toString();
            }
        });
        b.setNegativeButton("CANCEL", null);
        b.show();
    }
}

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