Android Robotium test multi application with one test apk

I would test a lot of applications with one Test application. Currently I use Robotium, this is my code (the sample of Robotium) :

public class NotePadTest extends ActivityInstrumentationTestCase2<NotesList>{

private Solo solo;
private ArrayList<String> mesActivites = new ArrayList<String>();

public NotePadTest() {
    super(NotesList.class);

}

@Override
public void setUp() throws Exception {
    //setUp() is run before a test case is started. 
    //This is where the solo object is created.
    solo = new Solo(getInstrumentation(), getActivity());
    InputStream instream = null;
    try {
        File sdcard = Environment.getExternalStorageDirectory();
        File file = new File(sdcard,"activity.txt");
        instream = new FileInputStream(file);
        if (instream != null) {
            InputStreamReader inputreader = new InputStreamReader(instream);
            BufferedReader buffreader = new BufferedReader(inputreader);
            String line;
            do {
                line = buffreader.readLine();
                mesActivites.add(line);
            } while (line != null);
        }
    } catch (Exception ex) {
    } finally {
        instream.close();
    }
}

@Override
public void tearDown() throws Exception {
    //tearDown() is run after a test case has finished. 
    //finishOpenedActivities() will finish all the activities that have been opened during the test execution.
    solo.finishOpenedActivities();
}

public void testClasse() throws Exception {
    for(int i=0;i<mesActivites.size();i++){
        System.out.println(mesActivites.get(i));
        solo.waitForActivity(mesActivites.get(i));
    }

}

I have try to load the package name into a textfile but it doesn't work.. My activity.txt contain for example :

com.example.application.MyActivity

I would write in the same test application every test method for my applications..

For example :

I would like test MyBluetooth.class, MyWifi.class, MyGSM.class in the same Test Application but each class is in different package.

How I can process ?