Question

I have an Activity which is resumed with

@Override
protected void onResume() {
            Log.v(TAG, " onResume() disables the OK button");
    // onAuthentificated will re-enable it
    findViewById(android.R.id.button1).setEnabled(false);
    super.onResume();
}

Later, the authentification is successful, and my callback is called

@Override
public void onAuthenticated(String username) {
    Log.v(TAG, "user can press button");
    findViewById(android.R.id.button1).setEnabled(true);
    super.onAuthenticated(username);
}

I know that the setEnabled(true) is called last.

My problem is that the button remains greyed out. What’s happening and how can I fix this?

The layout(but it won’t help)

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    style="@style/VerticalLayout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <!-- other stuff --> 
    <Button
        android:id="@android:id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:text="@android:string/ok" />

</LinearLayout>

Here are the last lines of logcat

08-30 13:00:45.182: V/ReportActivity(344): onResume() disables the OK button
8-30 13:00:45.382: I/ReportActivity(344): Authentification token callback
08-30 13:00:45.477: D/dalvikvm(344): GC_CONCURRENT freed 324K, 5% free 9960K/10375K, paused 2ms+3ms
08-30 13:00:45.567: D/NetworkService(344): Broadcast the fact user is authenticated
08-30 13:00:45.567: D/ReportActivity(344): user can press button

Answer 1

The solution is to store the result of findViewById(android.R.id.button1) in a field that is initialized by the onResume() method.