MainActivity.java

package com.garagze;

import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import com.garagze.service.EventService;

public class MainActivity extends Activity {

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

		PlaceholderFragment fragment = new PlaceholderFragment();
		if (savedInstanceState == null) {
			getFragmentManager().beginTransaction()
					.add(R.id.container, fragment)
					.commit();
		}
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {

		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		switch (item.getItemId()) {
			case R.id.action_settings:
				return true;
		}
		return super.onOptionsItemSelected(item);
	}

	/**
	 * A placeholder fragment containing a simple view.
	 */
	public static class PlaceholderFragment extends Fragment {

		public PlaceholderFragment() {
		}

		@Override
		public View onCreateView(LayoutInflater inflater, ViewGroup container,
								 Bundle savedInstanceState) {
			View rootView = inflater.inflate(R.layout.fragment_main, container, false);

			assert getActivity() != null;
			int eventCount = ((MainActivity) getActivity()).getEventCount();
			String displayText = "Number of events: " + eventCount;
			// Reference view element and set display text

			View view = getView();
			TextView textField =  (TextView) rootView.findViewById(R.id.textView);
			textField.setText(displayText);
			return rootView;
		}
	}

	private int getEventCount() {
		return EventService.getAllEvents(this).size();
	}

}

MainActivityTest.java

package com.garagze;

import android.content.Intent;
import android.test.ActivityUnitTestCase;
import android.widget.TextView;

/**
 * Created with IntelliJ IDEA.
 * User: josephbass
 * Date: 12/3/13
 * Time: 1:00 PM
 */
public class MainActivityTest extends ActivityUnitTestCase<MainActivity> {

	private MainActivity mainActivity;

	public MainActivityTest() {
		super(MainActivity.class);
	}

	@Override
	protected void setUp() throws Exception {
		super.setUp();
		Intent intent = new Intent(getInstrumentation().getTargetContext(), MainActivity.class);
		startActivity(intent, null, null);
		this.mainActivity = getActivity();
	}

	public void testActivityUI() {
		TextView textView = (TextView) mainActivity.findViewById(R.id.textView);
		assertNotNull(textView);
		assertEquals("Number of events: 15", textView.getText().toString());

	}
}