Question

I am trying to display a dialog in the onClick method of a TextView. I tested the onClick without the dialog box using a log and it works. When I add the dialogbox to it, like this:

Context context = getApplicationContext();
            Dialog d = new Dialog(context);
            d.setTitle("Test");
            TextView testField = new TextView(context);
            testField.setText("Success!");
            d.setContentView(testField);
            d.show();

This is all in a textView’s onClick method. The exception I get says unable to add window — token null is not for an application.

Can someone please explain to me why this isn’t working. I have tons of questions here about getting exceptions in android and the answer always has to do with the order of the code. Is there a reference somewhere about how code should be ordered?!

Thanks!

Answer 1

When you are creating Dialog in onClick() always use

void onClick(View v)
{
    Dialog d = new Dialog(v.getContext());
                          ^^^^^^^^^^^^^^
    TextView testField = new TextView(v.context);
    testField.setText("Success!");
    d.setContentView(testField);
    d.show();
}