Verify Loader Behavior

add log message to
initLoader(), onCreateLoader() callback, Loader startLoading()method
onLoadFinished() callback, Loader loadInBackground() method
onLoaderReset() callback, queryUtils fetchEarthquakeData() method

<RelativeLayout
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_width="match_parent"
	android:layout_height="match_parent">

	<ListView
		android:id="@+id/list"
		android:orientation="vertical"
		android:layout_width="match_parent"
		android:layout_height="match_parent"
		android:divider="@null"
		android:dividerHeight="0dp"/>

	<TextView
		android:id="@+id/empty_view"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_centerInParent="true"
		android:textAppearance="?android:textAppearanceMedium"/>

</RelativeLayout>

private TextView mEmptyStateTextView;

@Override
protected void onCreate(Bundle savedInstanceState){
	mEmptyStateTextView = (TextView) findViewById(R.id.empty_view);
	earthquakeListView.setEmptyView(mEmptyStateTextView);
}

@Override
public void onLoadFinished(Loader<List<Earthquake>> loader, List<Earthquake> earthquakes){
	mEmptyStateTextView.setText(R.string.no_earthquakes);
}