How can I get reference on TextView from XML layout in AlertDialog?

Question

I have a curious problem with getting reference on TextView, SeekBar and other widgets. My AlertDialog looks like this:

public class LineDialog extends AlertDialog {
private static SeekBar seekBar1, seekBar2, seekBar3;
private static TextView textView1, textview2, textView3;

protected LineDialog(final Context context, final DrawView drawView) {
    super(context);

    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View dialogLayout = inflater.inflate(R.layout.line_dialog, null);

    setView(dialogLayout);
    setTitle("Line properties");
    textView1 = (TextView) findViewById(R.id.textView1); // TODO Code crash here :(
    setButton("Ok", new DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which) {
            seekBar1 = (SeekBar) findViewById(R.id.seek1);
            // some other code...
        }
    });
}

When I want get reference in Line where is

textView1 = (TextView) findViewById(R.id.textView1);

Logcat send me an Error

requestFeature() must be called before adding content

But when I get reference in onClick() method in LineDiealog(AlertDialog) everything works fine. Unfortunately this is too late, because I need this reference before LineDialog.show() is called...

what is there to down-vote, i dont get why -3 ? – MKJParekh May 08 '12 at 09:12 — MKJParekh, May 08 '12 at 09:12

score 4 · Answer 1 · edited Jul 01 '14 at 01:10

4

You almost had it there in your original code. You saved the View returned by LayoutInflater, so that's the one you should use when calling findViewById() so it must be dialogLayout.findViewById(...). I was having the same issue myself and works like charm now.

edited Jul 01 '14 at 01:10

rayryeng

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answered Jul 01 '14 at 00:49

M_Mendoza

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excellent answer. I just missed that as well – Umair Jul 10 '22 at 19:37

score 1 · Answer 2 · edited May 23 '17 at 12:22

1

Here is an example of the custom AlertDialogbox and How to implement a custom AlertDialog View you can see how to add the view to the alertdialogbox.

edited May 23 '17 at 12:22

Community

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answered May 08 '12 at 09:17

V.J.

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Thanks for link, but its little different situation. They have Dialog like inner class and they can call ' TextView text = (TextView) dialog.findViewById(R.id.TextView01)'. In my case doesnt exist any dialog instance because its in her constructor.. – west44 May 08 '12 at 09:26

Rilcon42 · Answer 3 · 2016-09-14T14:42:07.023

You must either reference your textView by LinearLayout or by android:id in the xml file.

LinearLayout example:

LinearLayout mainLinear = new LinearLayout(this);
mainLinear.addView(textBox);

the add text to the box:

textBox.addText("This is the text to add to the text box");

xml reference (you must create the text box in xml first!!!!):

TextView text1=(TextView) findViewById(R.id.NAME);
text1.setText("Hello please pick an option below");

The NAME portion must be replaced with the android:id name in the .xml file

How can I get reference on TextView from XML layout in AlertDialog?

3 Answers3