我正在尝试为我的应用程序实现一个小部件，但我遇到了 PendingIntent 捆绑包的问题。
我的小部件有两个按钮，如果一个被按下，小部件应该更新其内容。但是，如果我无法更新onReceive方法中的小部件，因为捆绑始终是null. 任何想法？
public class StudyWidgetProvider extends AppWidgetProvider {
private static String LOG_TAG = StudyWidgetProvider.class.toString();
private static String BUTTON_BACK = "BUTTON_BACK";
private static String BUTTON_FORWARD = "BUTTON_FORWARD";
private Calendar currentDate = Calendar.getInstance();
private RemoteViews widget;
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
for(int i=0; i<appWidgetIds.length; i++){
Log.i(LOG_TAG, "Update Widget");
Intent intent = new Intent(context, WidgetService.class);
intent.setData(Uri.parse(intent.toUri(Intent.URI_INTENT_SCHEME)));
widget = new RemoteViews(context.getPackageName(), R.layout.widget);
SimpleDateFormat dateFormater = new SimpleDateFormat("EEEE");
widget.setTextViewText(R.id.widget_day, dateFormater.format(currentDate.getTime()));
dateFormater = new SimpleDateFormat("dd.MM.yyyy");
widget.setTextViewText(R.id.widget_date, dateFormater.format(currentDate.getTime()));
//Button-Actions
Intent backIntent = new Intent(context, StudyWidgetProvider.class);
backIntent.setAction(BUTTON_BACK);
Intent forwardIntent = new Intent(context, StudyWidgetProvider.class);
forwardIntent.setAction(BUTTON_FORWARD);
PendingIntent backPendingIntent = PendingIntent.getBroadcast(context, 0, backIntent, PendingIntent.FLAG_UPDATE_CURRENT);
PendingIntent forwardPendingIntent = PendingIntent.getBroadcast(context, 0, forwardIntent, PendingIntent.FLAG_UPDATE_CURRENT);
widget.setOnClickPendingIntent(R.id.widget_but_back, backPendingIntent);
widget.setOnClickPendingIntent(R.id.widget_but_forward, forwardPendingIntent);
widget.setRemoteAdapter(appWidgetIds[i], R.id.words, intent);
appWidgetManager.updateAppWidget(appWidgetIds[i], widget);
}
super.onUpdate(context, appWidgetManager, appWidgetIds);
}
@Override
public void onReceive(Context context, Intent intent) {
super.onReceive(context, intent);
String action = intent.getAction();
if(action.equals(BUTTON_BACK)){
Log.i(LOG_TAG, "Pressed back");
currentDate.set(Calendar.DATE, -1);
}
if(action.equals(BUTTON_FORWARD)){
Log.i(LOG_TAG, "Pressed forward");
currentDate.set(Calendar.DATE, 1);
}
Bundle extras = intent.getExtras();
if(extras != null){
Log.i(LOG_TAG, "Bundle not null");
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
ComponentName thisAppWidget = new ComponentName(context.getPackageName(), StudyWidgetProvider.class.getName());
int[] appWidgetIds = appWidgetManager.getAppWidgetIds(thisAppWidget);
onUpdate(context, appWidgetManager, appWidgetIds);
}
}
}