android.appwidget.AppWidgetManager#ACTION_APPWIDGET_UPDATE源码实例Demo

public final void complete(String directory) {
    Intent intent = getIntent();
    Bundle extras = intent.getExtras();
    if (extras != null) {
        mAppWidgetId = extras.getInt(
                AppWidgetManager.EXTRA_APPWIDGET_ID,
                AppWidgetManager.INVALID_APPWIDGET_ID);

        Context context = getApplicationContext();

        // Store widget filter
        SharedPreferences preferences = context.getSharedPreferences("" + mAppWidgetId, MODE_PRIVATE);
        SharedPreferences.Editor editor = preferences.edit();
        editor.putString(Constants.WIDGET_PATH, directory);
        editor.apply();

        Intent resultValue = new Intent(context, FilesWidgetService.class);
        resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId);
        setResult(RESULT_OK, resultValue);

        Intent i = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE, null, this, WriteilyWidgetProvider.class);
        i.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[]{mAppWidgetId});
        sendBroadcast(i);

        finish();
    }
}
 

public static void requestWidgetUpdate(Context context ){
    Intent brIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
    context.getApplicationContext().sendBroadcast(brIntent);

}
 

public static void triggerUpdate(Context context) {
    final Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
    intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, getAppWidgetIds(context));
    context.sendBroadcast(intent);
}
 

@Override
public void onReceive(@NotNull Context context, @NotNull Intent intent) {
    String action = intent.getAction();
    if (intent.getExtras() == null)
        return;
    final int appWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);
    final DilbertPreferences preferences = new DilbertPreferences(context);
    if (action == null || appWidgetId == -1) {
        super.onReceive(context, intent);
        return;
    }
    if (currentToast != null)
        currentToast.cancel();
    switch (action) {
        case INTENT_PREVIOUS:
            preferences.saveDateForWidgetId(appWidgetId, preferences
                    .getDateForWidgetId(appWidgetId).minusDays(1));
            break;
        case INTENT_NEXT:
            preferences.saveDateForWidgetId(appWidgetId, preferences
                    .getDateForWidgetId(appWidgetId).plusDays(1));
            break;
        case INTENT_LATEST:
            preferences.saveDateForWidgetId(appWidgetId,
                    LocalDate.now());
            break;
        case INTENT_RANDOM:
            preferences.saveDateForWidgetId(appWidgetId,
                    DilbertPreferences.getRandomDate());
            break;
        case INTENT_REFRESH:
            preferences
                    .removeCache(preferences.getDateForWidgetId(appWidgetId));
            break;
        case INTENT_DISPLAY:
            preferences.saveCurrentDate(preferences
                    .getDateForWidgetId(appWidgetId));
            Intent display = new Intent(context, DilbertFragmentActivity.class);
            display.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(display);
            break;
        case AppWidgetManager.ACTION_APPWIDGET_UPDATE:
            LocalDate current = preferences.getDateForWidgetId(appWidgetId);
            if (current.equals(LocalDate.now()
                    .minusDays(1))) {
                preferences.saveDateForWidgetId(appWidgetId,
                        LocalDate.now());
            }
            break;
    }
    updateAppWidget(context, AppWidgetManager.getInstance(context),
            appWidgetId);
    if (currentToast != null)
        currentToast.show();
    super.onReceive(context, intent);
}