ViewFlipper in app widgets

Question

I\'m playing around building a new widget and was looking at the Android app widget documentation, in particular the section on which widget classes were supported. I notic

Answer 1

Say you have 2 buttons: LEFT and RIGHT. First you would attach pending intent to each (here it's triggered from Service#onStart:

@Override
public void onStart(Intent intent, int startId) {
    AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(this.getApplicationContext());
    int[] allWidgetIds = intent.getIntArrayExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS);
    // add listeners for every widget registered
    for (int widgetId : allWidgetIds) {
        addClickListeners(appWidgetManager, widgetId, root);
    }
    stopSelf();
}

protected void addClickListeners(AppWidgetManager appWidgetManager, int widgetId, RemoteViews root) {
    root.setOnClickPendingIntent(R.id.left, getNavigationIntent(widgetId, R.id.left));
    root.setOnClickPendingIntent(R.id.right, getNavigationIntent(widgetId, R.id.right));
}

protected PendingIntent getNavigationIntent(int widgetId, final int id) {
    Intent clickIntent = new Intent(this, WidgetProvider.class);
    clickIntent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
    clickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, widgetId);
    clickIntent.putExtra(TRIGGER, id);

    PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, clickIntent,
            PendingIntent.FLAG_UPDATE_CURRENT);
    return pendingIntent;
}

Then, in AppWidgetProvider do

@Override
public void onReceive(Context context, Intent intent) {
    String action = intent.getAction();
    Bundle extras = intent.getExtras();
    Integer id = (Integer) (extras == null ? null : extras.get(TRIGGER));
    if (AppWidgetManager.ACTION_APPWIDGET_UPDATE.equals(action) && id != null) {
        int widgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, 0);
        onNavigate(context, widgetId, id); 
    } else {
        super.onReceive(context, intent);
    }
}


protected void onNavigate(Context context, Integer widgetId, Integer id) {  
    AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
    RemoteViews root = new RemoteViews(context.getPackageName(), R.layout.app_widget);
    if (id == R.id.left) {
        root.showPrevious(R.id.scroll);
    } else {
        root.showNext(R.id.scroll);            
    }
    appWidgetManager.updateAppWidget(widgetId, root);
}

This should do it. Now the problem is - this will only work in API 11+ and I just found the hard way that root.setInt(R.id.scroll, "setDisplayedChild", pos) will not work in API 7.