android - 在自定义对话框中设置 TextView

Question

我已经创建了一个自定义对话框，但我无法将文本设置到 java 对话框布局中的 TextView 中，我的程序崩溃了。我的错误是什么？

public class Total_CBC extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.total_cbc);
    final TextView RBC_T = (TextView) findViewById(R.id.total_cbc_text_rbc);

    Button RBC_B = (Button) findViewById(R.id.total_cbc_btn_rbc);

    //

    RBC_B.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            showCustomDialog(RBC_T);
        }
    });
}


protected void showCustomDialog(final TextView _RBC_T) {
    final Dialog dialog = new Dialog(Total_CBC.this);
    dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
    dialog.setContentView(R.layout.dialog_edit);
    final EditText editText = (EditText) dialog.findViewById(R.id.dialog_edit_edittext);
    Button button = (Button) dialog.findViewById(R.id.dialog_edit_btn);
    TextView titel = (TextView) findViewById(R.id.dialog_edit_text_title);
    titel.setText("RBC");
    button.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            _RBC_T.setText(editText.getText().toString());
            dialog.dismiss();
        }
    });
    dialog.show();
}

} 当我删除这行程序时，我需要设置文本

titel.setText("RBC");

Answer 1

改变

 TextView titel = (TextView) findViewById(R.id.dialog_edit_text_title);

到

 TextView titel = (TextView) dialog.findViewById(R.id.dialog_edit_text_title);