Display List Data: onClick gets a fatal error, class not in manifest?

Got a strange error when I went back to try a list view again (was having trouble with CustomAdapter so switched to using this approach).

My app crashes when I click on click on the Daily Button. Logs says the "DailyActivity" class is not in the manifest (huh?). Didn't seem to have a problem when I built and Grundle found the class.

android.content.ActivityNotFoundException: Unable to find explicit activity class... {com.seattleshinebox.weatherapp/com.seattleshinebox.weatherapp.ui.TestList}; have you declared this activity in your AndroidManifest.xml?

Inside MainActivity I have: @OnClick (R.id.test_button) public void startTestActivity(View view) { Intent intent = new Intent(this,TestList.class); startActivity(intent); }

And in TestList I have: public class TestList extends ListActivity{

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_list);

    String[] day = {"Mon", "Tues", "Wed", "Thus"};
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, day);
    setListAdapter(adapter);

}

}