如何设置 dialog 中的 setView？

Question

我使用下面的代码在 dialog 中设置 setView：

LayoutInflater inflater = LayoutInflater.from(this);
View layout = inflater.inflate(R.layout.mylayout, null);
TextView MyTextView = (TextView)findViewById(R.id.my_tv);
MyTextView.setText("test");
AlertDialog MyDialog;
AlertDialog.Builder MyBuilder = new AlertDialog.Builder(this);
MyBuilder.setTitle("title");
MyBuilder.setView(layout);
MyDialog = MyBuilder.create();
MyDialog.show();

my_tv 在mylayout.xml中是一个TextView。

但是在MyTextView.setText("test");这一行有 NullPointer错误。
如何修改？

Answer 1

LayoutInflater inflater = LayoutInflater.from(this);
View layout = inflater.inflate(R.layout.mylayout, null);
TextView MyTextView = (TextView)layout.findViewById(R.id.my_tv);//注意这一句
MyTextView.setText("test");
AlertDialog MyDialog;
AlertDialog.Builder MyBuilder = new AlertDialog.Builder(this);
MyBuilder.setTitle("title");
MyBuilder.setView(layout);
MyDialog = MyBuilder.create();
MyDialog.show();