I've read about 10 posts now about onclick events and Widgets and I understand they are implemented differently. However, despite the success other people are having I seem to be finding it impossible to get it to work. I'm using Android Studio 2.2 and have created a simple test app. I have a button called button. I want a toast to display when I press the button.
I've copied the code as suggested in the other posts. Can someone take a look and see if I am doing anything wrong?
public class NewAppWidget extends AppWidgetProvider {
private static final String MyOnClick = "myOnClickTag";
protected PendingIntent getPendingSelfIntent(Context context, String action) {
Intent intent = new Intent(context, getClass());
intent.setAction(action);
return PendingIntent.getBroadcast(context, 0, intent, 0);
}
void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
int appWidgetId) {
CharSequence widgetText = context.getString(R.string.appwidget_text);
// Construct the RemoteViews object
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.new_app_widget);
views.setOnClickPendingIntent(R.id.button, getPendingSelfIntent(context, MyOnClick));
views.setTextViewText(R.id.appwidget_text, widgetText);
// Instruct the widget manager to update the widget
appWidgetManager.updateAppWidget(appWidgetId, views);
}
//RemoteViews.setOnClickPendingIntent(R.id.button, getPendingSelfIntent(context, MyOnClick));
#Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
// There may be multiple widgets active, so update all of them
for (int appWidgetId : appWidgetIds) {
updateAppWidget(context, appWidgetManager, appWidgetId);
}
}
#Override
public void onEnabled(Context context) {
// Enter relevant functionality for when the first widget is created
}
#Override
public void onDisabled(Context context) {
// Enter relevant functionality for when the last widget is disabled
}
#Override
public void onReceive(Context context, Intent intent) {
super.onReceive(context, intent);//add this line
if (MyOnClick.equals(intent.getAction())){
//your onClick action is here
//display in short period of time
Toast.makeText(context, "msg msgasdasd", Toast.LENGTH_SHORT).show();
}
};
}
OK - really weird. Restarted the android emulator and it started working.
Mmmmm.
Cheers
Related
I am trying to create a button in my app's widget. I expect it to open a dialog box when clicked. I am unsure of how to implement this.
Here is the widget's code:
public class IncompleteTodosWidget extends AppWidgetProvider {
static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
int appWidgetId) {
Intent intent = new Intent(context, timeTypeSelector.class);
PendingIntent pendingIntent = PendingIntent.getActivity(
/* context = */ context,
/* requestCode = */ 0,
/* intent = */ intent,
/* flags = */ PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE
);
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.incomplete_todos_widget);
views.setOnClickPendingIntent(R.id.appwidget_text, pendingIntent);
appWidgetManager.updateAppWidget(appWidgetId, views);
}
#Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
// There may be multiple widgets active, so update all of them
for (int appWidgetId : appWidgetIds) {
updateAppWidget(context, appWidgetManager, appWidgetId);
}
}
}
Here is the code of the dialog box:
public class timeTypeSelector extends DialogFragment {
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage("Demo message")
.setPositiveButton("Perform miracles", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Log.d("Bitcoin has reached 69,42,000");
}
})
.setNegativeButton("Close", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Log.d("Bitcoin would have reached 69,42,000 if you had clicked the other button");
}
});
// Create the AlertDialog object and return it
return builder.create();
}
}
When I try clicking the view with id appwidget_text, my app gets opened instead of the dialog box. Where am I going wrong?
Hej Pro,
a PendingIntent cannot target a DialogFragment directly - only Activity, Service or Broadcast.
You have to set an action on your Intent to identify the click on the view with id (R.id.appwidget_text). When your app is opened and check the received Intent if it is the action for displaying your DialogFragment and navigate to it.
I have a calendar widget and I'm updating it myself everyday at 12:01AM as well when the size is changed so I don't have a need for automatic update. I also set the updatePeriodMillis to 0. The problem I'm having is that the App Widget calls onAppWidgetOptionsChanged():
Every time the screen unlocks
Every time you're brought home
It wouldn't be an issue for me, but the problem is you can see for a split second the App Widget updating. Anyone know of any way I can prevent that from happening?
For reference here is part of my WidgetProvider class
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action != null) {
if (action.equals(ACTION_REFRESH) || action.equals(ACTION_NEXT) || action.equals(ACTION_PREVIOUS)) {
context.sendBroadcast(new Intent(action));
}
}
Bundle extra = intent.getExtras();
if (extra != null && extra.containsKey(KEY_APP_WIDGET_ID)) {
updateAppWidget(context, AppWidgetManager.getInstance(context), extra.getInt(KEY_APP_WIDGET_ID));
}
super.onReceive(context, intent);
}
#Override
public void onAppWidgetOptionsChanged(Context context, AppWidgetManager appWidgetManager, int appWidgetId, Bundle newOptions) {
int width = Util.dp2px(newOptions.getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_WIDTH));
Intent broadcastIntent = new Intent(ACTION_REFRESH);
broadcastIntent.putExtra(KEY_SIZE_CHANGE, width);
context.sendBroadcast(broadcastIntent);
updateAppWidget(context, appWidgetManager, appWidgetId);
super.onAppWidgetOptionsChanged(context, appWidgetManager, appWidgetId, newOptions);
}
private static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
int appWidgetId) {
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget);
Intent intent = new Intent(context, WidgetService.class);
views.setRemoteAdapter(R.id.widget_calendar_container, intent);
// Buttons on widget click handlers
views.setOnClickPendingIntent(R.id.widget_refresh, getPendingSelfIntent(context, ACTION_REFRESH, appWidgetId));
views.setOnClickPendingIntent(R.id.widget_next, getPendingSelfIntent(context, ACTION_NEXT, appWidgetId));
views.setOnClickPendingIntent(R.id.widget_previous, getPendingSelfIntent(context, ACTION_PREVIOUS, appWidgetId));
// Widget Container click handler
Intent homeIntent = new Intent(Intent.ACTION_MAIN);
homeIntent.addCategory(Intent.CATEGORY_LAUNCHER);
homeIntent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
homeIntent.setComponent(new ComponentName(context.getPackageName(), Home.class.getName()));
PendingIntent homePendingIntent = PendingIntent.getActivity(context, 0, homeIntent, 0);
views.setPendingIntentTemplate(R.id.widget_calendar_container, homePendingIntent);
// Instruct the widget manager to update the widget
appWidgetManager.updateAppWidget(appWidgetId, views);
appWidgetManager.notifyAppWidgetViewDataChanged(appWidgetId, R.id.widget_calendar_container);
}
I prefer another answer, but this is what I got so far.
#Override
public void onAppWidgetOptionsChanged(Context context, AppWidgetManager appWidgetManager, int appWidgetId, Bundle newOptions) {
int width = Util.dp2px(newOptions.getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_WIDTH));
if (width != WidgetRemoteViewsFactory.width) {
Intent broadcastIntent = new Intent(ACTION_REFRESH);
broadcastIntent.putExtra(KEY_SIZE_CHANGE, width);
LocalBroadcastManager.getInstance(context).sendBroadcast(broadcastIntent);
updateAppWidget(context, appWidgetManager, appWidgetId);
super.onAppWidgetOptionsChanged(context, appWidgetManager, appWidgetId, newOptions);
}
}
I made the field I am interested in width static on WidgetRemoteViewsFactory and I am only broadcasting when that field changes. I can't seem to prevent onAppWidgetOptionsChanged() from being called because AppWidgetManager.ACTION_APPWIDGET_OPTIONS_CHANGED is being broadcasted and received every time the screen is awaken.
Android Documentation says
Called in response to the AppWidgetManager.ACTION_APPWIDGET_OPTIONS_CHANGED broadcast when this widget has been layed out at a new size. -
AppWidgetProvider#onAppWidgetOptionsChanged
But that action is being broadcasted every time the screen awakens.
If anyone has a better solution, please feel free to post it. There has to be a better solution or this is a bug on Android's side.
I know this has been asked for many times but I went through the documentation from top to bottom, read all answers here and none of them helped.
To be honest, each answer says something different about how to aproach this.
Now back to my question. I want to update the widget list view from some activity and I created WidgetProvider#sendUpdateBroadcastToAllWidgets() for this purpose which I call from the activity.
It eventually calls the onUpdate() so the broadcast is received correctly. But the views are not refreshed.
I also tried to call AppWidgetManager#notifyAppWidgetViewDataChanged() and refreshed the data in WidgetFactory#onDataSetChanged() but the method has never been called.
So I guess this all does not work because the remote views factory is cached but I don't know how to reliably overcome this. Any thoughts?
And what about contexts? I always have to supply one but I don't really care much which one. Does it matter?
Thanks
PROVIDER
public class WidgetProvider extends AppWidgetProvider {
public static void sendUpdateBroadcastToAllWidgets(Context context) {
int allWidgetIds[] = AppWidgetManager.getInstance(context).getAppWidgetIds(new ComponentName(context, WidgetProvider.class));
Intent intent = new Intent(context, WidgetProvider.class);
intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, allWidgetIds);
context.sendBroadcast(intent);
}
#Override
public void onUpdate(Context context, AppWidgetManager widgetManager, int[] widgetIds) {
for (int id : widgetIds) {
updateWidget(context, widgetManager, id);
}
super.onUpdate(context, widgetManager, widgetIds);
}
#Override
public void onDeleted(Context context, int[] widgetIds) {
WidgetPreferences prefs = new WidgetPreferences(context);
for (int widgetId : widgetIds) {
prefs.getWidgetPreferences(widgetId).edit().clear().commit();
}
super.onDeleted(context, widgetIds);
}
private static void updateWidget(Context context, AppWidgetManager widgetManager, int widgetId) {
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget);
// set list adapter
Intent serviceIntent = new Intent(context, WidgetService.class);
serviceIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, widgetId);
serviceIntent.setData(Uri.parse(serviceIntent.toUri(Intent.URI_INTENT_SCHEME)));
views.setRemoteAdapter(android.R.id.list, serviceIntent);
views.setEmptyView(android.R.id.list, android.R.id.empty);
// set widget title
WidgetDataCategory category = new WidgetPreferences(context).getSavedCategory(widgetId);
views.setTextViewText(R.id.titleText, context.getString(category.titleResourceId()));
// set onclick listener - we create a pending intent template and when an items is clicked
// the intent is filled with missing data and sent
Intent startActivityIntent = new Intent(context, SimplePersonDetailActivity.class);
startActivityIntent.setData(Uri.parse(startActivityIntent.toUri(Intent.URI_INTENT_SCHEME)));
startActivityIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);
startActivityIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, widgetId);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, startActivityIntent, PendingIntent.FLAG_UPDATE_CURRENT);
views.setPendingIntentTemplate(android.R.id.list, pendingIntent);
// all hail to Google
widgetManager.updateAppWidget(widgetId, views);
}
}
FACTORY
public class WidgetFactory implements RemoteViewsService.RemoteViewsFactory {
private Context context;
private List<Person> people = new ArrayList<>();
public WidgetFactory(Context context, Intent intent) {
this.context = context;
int widgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
if (widgetId != AppWidgetManager.INVALID_APPWIDGET_ID) {
WidgetPreferences prefs = new WidgetPreferences(context);
WidgetDataCategory category = prefs.getSavedCategory(widgetId);
int numberOfItemsToShow = prefs.getSavedLimit(widgetId);
people = category.filterAndSlice(new PersonDao(context).getAllForGroup(Constants.SIMPLE_GROUP_ID), numberOfItemsToShow);
}
}
#Override
public void onCreate() {}
#Override
public void onDataSetChanged() {}
#Override
public void onDestroy() {}
#Override
public int getCount() {
return people.size();
}
#Override
public RemoteViews getViewAt(int position) {
Person person = people.get(position);
BigDecimal amount = ListViewUtil.sumTransactions(new TransactionDao(context).getAllForPerson(person));
RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.item_widget);
remoteViews.setTextViewText(R.id.nameText, person.getName());
remoteViews.setTextViewText(R.id.amountText, MoneyFormatter.withoutPlusPrefix().format(amount));
// fill details for the onclick listener (updating the pending intent template
// set in the WidgetProvider)
Intent listenerIntent = new Intent();
listenerIntent.putExtra(Constants.PERSON_ID, people.get(position).getId());
remoteViews.setOnClickFillInIntent(R.id.widgetItem, listenerIntent);
return remoteViews;
}
#Override
public RemoteViews getLoadingView() {
return null;
}
#Override
public int getViewTypeCount() {
return 1;
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public boolean hasStableIds() {
return true;
}
}
I would say that notifyAppWidgetViewDataChanged method should work for you.
You have to build AppWidgetManager and get appWidgetIds and then just call notifyAppWidgetViewDataChanged on your AppWidgetManager.
Pseudo Code,
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
int appWidgetIds[] = appWidgetManager.getAppWidgetIds(
new ComponentName(context, WidgetProvider.class));
appWidgetManager.notifyAppWidgetViewDataChanged(appWidgetIds, R.id.listview);
For more, you can checkout my answer here which contains demo on github.
I had a widget implementation in my project. I have modified the below code so that data in widget can be changed from one of my Activity in application. Only showing the essential code for your specific use case. Here I am having a button with text in my widget. Through login button click in my Activity , I am modifying the button text in my widget
Below is my AppWidgetProvider.java class
public class AppWidgetTrackAsset extends AppWidgetProvider{
#Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
// Perform this loop procedure for each App Widget that belongs to this provider
final int N = appWidgetIds.length;
for (int i=0; i<N; i++) {
int appWidgetId = appWidgetIds[i];
// Create an Intent to launch Activity
Intent intent = new Intent(context, WidgetAlertActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
// Get the layout for the App Widget and attach an on-click listener
// to the button
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.app_widget_track_asset);
views.setOnClickPendingIntent(R.id.sosButton, pendingIntent);
// Tell the AppWidgetManager to perform an update on the current app widget
appWidgetManager.updateAppWidget(appWidgetId, views);
}
}
#Override
public void onReceive(Context context, Intent intent) {
super.onReceive(context, intent);
Log.v(Constants.WIDGET_LOG, "onReceive called with " + intent.getAction());
if (intent.getAction().equals("update_widget")) {
// widget update started
RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
R.layout.app_widget_track_asset);
// Update text , images etc
remoteViews.setTextViewText(R.id.sosButton, "My updated text");
// Trigger widget layout update
AppWidgetManager.getInstance(context).updateAppWidget(
new ComponentName(context, AppWidgetTrackAsset.class), remoteViews);
}
}
#Override
public void onEnabled(Context context) {
// Enter relevant functionality for when the first widget is created
}
#Override
public void onDisabled(Context context) {
// Enter relevant functionality for when the last widget is disabled
}
}
Below is my Activity where I am updating the widget button text on click of my login button
LoginActivity.java
public class LoginActivity extends AppCompatActivity implements View.OnClickListener{
Button loginButton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
loginButton=(Button)findViewById(R.id.loginButton);
loginButton.setOnClickListener(this);
}
#Override
public void onClick(View v) {
if(v.getId() == R.id.loginButton){
updateWidget();
}
}
private void updateWidget(){
try {
Intent updateWidget = new Intent(this, AppWidgetTrackAsset.class);
updateWidget.setAction("update_widget");
PendingIntent pending = PendingIntent.getBroadcast(this, 0, updateWidget, PendingIntent.FLAG_CANCEL_CURRENT);
pending.send();
} catch (PendingIntent.CanceledException e) {
Log.e(Constants.UI_LOG,"Error widgetTrial()="+e.toString());
}
}
}
Layout for app widget goes like this
app_widget_track_asset.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/widgetbackground"
android:padding="#dimen/widget_margin">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/sosButton"
android:text="SOS"
android:textSize="20sp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
/>
</RelativeLayout>
Below is the manifest file essential part for widget
<receiver android:name=".appwidget.AppWidgetTrackAsset">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="#xml/app_widget_track_asset_info" />
</receiver>
I have a method in a plain class file (not an activity) that I run from my main activity, and I also want to run it from my home screen widget.
The button in the widget works perfectly as long as the app is open in the background. If I close the app from recent tasks the button stops working.
I think I need to start the app with the button click as well, but I don't want it to open the main activity, just run the method. How can I do this?
Here is my code for the widget:
public class PanicWidget extends AppWidgetProvider {
public static final String CLICK_PANIC = "PANIC";
#Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.panic_widget);
Intent intent = new Intent(context, PanicWidget.class);
intent.setAction(CLICK_PANIC);
PendingIntent actionPendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
remoteViews.setOnClickPendingIntent(R.id.panicbutton, actionPendingIntent);
appWidgetManager.updateAppWidget(appWidgetIds, remoteViews);
}
#Override
public void onReceive(Context context, Intent intent){
super.onReceive(context, intent);
if (CLICK_PANIC.equals(intent.getAction())){
Methods.countdown();
}
}
}
I'm working on an android widget and it works great in API Level 5 or greater. It's not supported at all in API Level 1 or 2. It should work absolutely fine in 3 and 4 but for some reason the widget doesn't update.
The onUpdate method gets called and executes without errors; however, in 3 and 4 it doesn't change the text of the widget. I'm pretty much at a loss. Any thoughts?
#Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget);
DataAccess helper = new DataAccess(context);
String text = helper.getCurrentText();
helper.close();
if (text != null)
views.setTextViewText(R.id.widget_text, text);
Intent intent = new Intent(context, WidgetDetailsActivity.class);
PendingIntent pending = PendingIntent.getActivity(context, 0, intent, 0);
views.setOnClickPendingIntent(R.id.widget, pending);
appWidgetManager.updateAppWidget(appWidgetIds, views);
}
Try this:
At the end of your update method you need to call the super.
#Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget);
DataAccess helper = new DataAccess(context);
String text = helper.getCurrentText();
helper.close();
if (text != null)
views.setTextViewText(R.id.widget_text, text);
Intent intent = new Intent(context, WidgetDetailsActivity.class);
PendingIntent pending = PendingIntent.getActivity(context, 0, intent, 0);
views.setOnClickPendingIntent(R.id.widget, pending);
appWidgetManager.updateAppWidget(appWidgetIds, views);
super.onUpdate(context, appWidgetManager, appWidgetIds);
}
You need to start service on update method and put your all code in service also,here I give onReceive and service demo
context.startService(new Intent(context, UpdateService.class));
public static class UpdateService extends Service {
#Override
public void onStart(Intent intent, int startId) {
// Build the widget update for today
RemoteViews updateViews = buildUpdate(this);
// Push update for this widget to the home screen
ComponentName thisWidget = new ComponentName(this,
Widget.class);
AppWidgetManager manager = AppWidgetManager.getInstance(this);
manager.updateAppWidget(thisWidget, updateViews);
}
#Override
public IBinder onBind(Intent intent) {
return null;
}
}
#Override
public void onReceive(Context context, Intent intent) {
final RemoteViews remoteViews = buildUpdate(context);
ComponentName cn = new ComponentName(context, Widget.class);
AppWidgetManager.getInstance(context).updateAppWidget(cn, remoteViews);
super.onReceive(context, intent);
}
where buildUpdate is method for your widget updating code