问题描述

更新 AlertDialog的 TextView结果

每次在对话框中设置textView的结果，应用会崩溃。对话框是通过链接包含textView的xml，并且这个textView就是需要更新的。

AlertDialog.Builder alert = new AlertDialog.Builder(this);
    LayoutInflater factory = LayoutInflater.from(this);
    resultOne=(TextView)findViewById(R.id.resultOne); //resultone is a textview in xml dialog

    resultOne.setText("hello");  //this code is making the app close

    final View textEntryView = factory.inflate(R.layout.dialog, null);
    alert.setView(textEntryView);
    alert.show();

解决方案

改变一下顺序可以访问View的子view，可能要用到textEntryView查询id

LayoutInflater factory = LayoutInflater.from(this);
final View textEntryView = factory.inflate(R.layout.dialog, null);

resultOne=(TextView)textEntryView.findViewById(R.id.resultOne); //resultone is a textview in xml dialog

resultOne.setText("hello");
alert.setView(textEntryView);

alert.show();