Android for Game Developers - Beginning Android Games - page 120

However, remember that we only have one main activity. So, what does our main activity look
like? We want a convenient way to add new activities, and we want the ability to start a specific
activity easily. With one main activity, it should be clear that that activity will somehow provide
us with a means to start a specific test activity. As discussed earlier, the main activity will be
specified as the main entry point in the manifest file. Each additional activity that we add will be
specified without the <intent-filter> child element. We'll start those programmatically from the
main activity.
The AndroidBasicsStarter Activity
The Android API provides us with a special class called ListActivity , which derives from the
Activity class that we used in the Hello World project. The ListActivity class is a special
type of activity whose single purpose is to display a list of things (for example, strings).
We use it to display the names of our test activities. When we touch one of the list items,
we'll start the corresponding activity programmatically. Listing 4-1 shows the code for our
AndroidBasicsStarter main activity.
Listing 4-1. AndroidBasicsStarter.java, Our Main Activity Responsible for Listing and Starting All Our Tests
package com.badlogic.androidgames;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class AndroidBasicsStarter extends ListActivity {
String tests[] = { "LifeCycleTest", "SingleTouchTest", "MultiTouchTest",
"KeyTest", "AccelerometerTest", "AssetsTest",
"ExternalStorageTest", "SoundPoolTest", "MediaPlayerTest",
"FullScreenTest", "RenderViewTest", "ShapeTest", "BitmapTest",
"FontTest", "SurfaceViewTest" };
public void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
setListAdapter( new ArrayAdapter<String>( this ,
android.R.layout. simple_list_item_1 , tests));
}
@Override
protected void onListItemClick(ListView list, View view, int position,
long id) {
super .onListItemClick(list, view, position, id);
String testName = tests[position];
try {
Class clazz = Class
.forName ("com.badlogic.androidgames." + testName);