Exiting cleanly after a crash on the UI thread

Question

I've implemented an UncaughtExceptionHandler in my Android code. If an error occurs, it first logs some diagnostic data, then it attempts to exit. I've followed the recipe in How to kill an application with all its activities? so that Activities cascade in closing.

This works when the error is in a non-UI thread, or when the main activity is active. However, if the error occurred on the UI thread on a subordinate Activity, the calling Activity never wakes up. onActivityResult() never gets called, and the application hangs. Is there any way to exit cleanly after the UI thread crashes?

Here's a simplified version:

public void uncaughtException( final Thread t, final Throwable e )
{
    Activity ac = currentActivity();
    ac.setResult( 99 );
    ac.finish();
}

in the main activity:

public boolean onOptionsItemSelected(MenuItem item)
{
    Intent intent = new Intent( getApplicationContext(), SettingsActivity.class );
    startActivityForResult( intent, 0 );
}

protected void onActivityResult( int rqC, int resultCode, Intent data )
{
    if ( resultCode == 99 )
    {
        setResult( 99 );
        finish();
    }
    super.onActivityResult( rqC, resultCode, data );
}