Prova questo:
final int APPWIDGET_HOST_ID = 2048;
final int REQUEST_PICK_APPWIDGET = 0;
final int REQUEST_CREATE_APPWIDGET = 5;
AppWidgetManager appWidgetManager;
AppWidgetHost appWidgetHost;
// Let user pick a widget from the list of intalled AppWidgets
public void selectWidget()
{
int appWidgetId = this.appWidgetHost.allocateAppWidgetId();
Intent pickIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_PICK);
pickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
addEmptyData(pickIntent);
startActivityForResult(pickIntent, REQUEST_PICK_APPWIDGET);
}
// For some reason you have to add this empty data, else it won't work
public void addEmptyData(Intent pickIntent)
{
ArrayList<AppWidgetProviderInfo> customInfo =
new ArrayList<AppWidgetProviderInfo>();
pickIntent.putParcelableArrayListExtra(
AppWidgetManager.EXTRA_CUSTOM_INFO, customInfo);
ArrayList<Bundle> customExtras = new ArrayList<Bundle>();
pickIntent.putParcelableArrayListExtra(
AppWidgetManager.EXTRA_CUSTOM_EXTRAS, customExtras);
};
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == REQUEST_PICK_APPWIDGET) {
configureWidget(data);
}
else if (requestCode == REQUEST_CREATE_APPWIDGET) {
createWidget(data);
}
}
else if (resultCode == RESULT_CANCELED && data != null) {
int appWidgetId =
data.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);
if (appWidgetId != -1) {
appWidgetHost.deleteAppWidgetId(appWidgetId);
}
}
}
// Show configuration activity of the widget picked by the user
private void configureWidget(Intent data) {
Bundle extras = data.getExtras();
int appWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);
AppWidgetProviderInfo appWidgetInfo =
appWidgetManager.getAppWidgetInfo(appWidgetId);
if (appWidgetInfo.configure != null) {
Intent intent =
new Intent(AppWidgetManager.ACTION_APPWIDGET_CONFIGURE);
intent.setComponent(appWidgetInfo.configure);
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
startActivityForResult(intent, REQUEST_CREATE_APPWIDGET);
} else {
createWidget(data);
}
}
// Get an instance of the selected widget as a AppWidgetHostView
public void createWidget(Intent data) {
Bundle extras = data.getExtras();
int appWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);
AppWidgetProviderInfo appWidgetInfo = appWidgetManager.getAppWidgetInfo(appWidgetId);
AppWidgetHostView hostView = appWidgetHost.createView(this, appWidgetId, appWidgetInfo);
hostView.setAppWidget(appWidgetId, appWidgetInfo);
// Add it on the layout you want
myLayout.addView(hostView);
}
// Call this when you want to remove one from your layout
public void removeWidget(AppWidgetHostView hostView) {
appWidgetHost.deleteAppWidgetId(hostView.getAppWidgetId());
// Remove from your layout
myLayout.removeView(hostView);
}
@Override
protected void onStart() {
super.onStart();
appWidgetManager = AppWidgetManager.getInstance(this);
appWidgetHost = new AppWidgetHost(this, APPWIDGET_HOST_ID);
// Start listening to pending intents from the widgets
appWidgetHost.startListening();
}
@Override
protected void onStop() {
super.onStop();
appWidgetHost.stopListening();
}
Tutto quello che devi fare è chiamare il metodo selectWidget()
ogni volta che si desidera visualizzare un elenco di AppWidgets installati sul dispositivo da scegliere.
Questo codice è un po 'una versione modificata del launcher Android di serie.
EDIT:
Per associare gli ID dei widget, cioè rendere aggiornamento widget e rispondere all'interazione dell'utente, vedere la soluzione qui: Widgets don't respond when re-added through code
fonte
2012-07-14 04:17:54
Ecco una buona spiegazione insieme ad un progetto di lavoro completo: http : //leonardofischer.com/hosting-android-widgets-my-appwidgethost-tutorial/ Fonte: http://leonardofischer.com/wp-content/uploads/2012/01/WidgetHostExample.zip Basta applicare questa correzione : http://selvaline.blogspot.it/2015/10/hosting-widgets-and-regurally-update.html – Pascal