小部件不会更新/重绘

Posted 2023-04-15

【中文标题】小部件不会更新/重绘

【英文标题】：Widget Wont Update / Redraw

【发布时间】：2020-02-22 12:32:59

【问题描述】：

我有一个从 SQLite 加载图像的小部件。每当我添加或删除项目但图像未更新时，它都会更新。我已经尝试向 AppWidgetProvider 类发送广播，但也没有用。

扩展 AppWidgetProvider 的类

private static void updateAppWidget(Context context, AppWidgetManager appWidgetManager, int appWidgetId) 
    Intent intent = new Intent(context, StackWidgetService.class);
    intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
    intent.setData(Uri.parse(intent.toUri(Intent.URI_INTENT_SCHEME)));

    RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.fav_movie_widget);
    views.setRemoteAdapter(R.id.stack_view, intent);
    views.setEmptyView(R.id.stack_view, R.id.empty_view);

    Intent toastIntent = new Intent(context, FavMovieWidget.class);
    toastIntent.setAction(FavMovieWidget.TOAST_ACTION);
    toastIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);

    intent.setData(Uri.parse(intent.toUri(Intent.URI_INTENT_SCHEME)));
    PendingIntent toastPendingIntent = PendingIntent.getBroadcast(context, 0, toastIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    views.setPendingIntentTemplate(R.id.stack_view, toastPendingIntent);

    appWidgetManager.updateAppWidget(appWidgetId, views);
    Log.e(TAG, "onUpdate2: start" );


    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) 
        Log.e(TAG, "onUpdate: start" );
        for (int appWidgetId : appWidgetIds) 
            updateAppWidget(context, appWidgetManager, appWidgetId);
        
    

更新活动

Context context = getApplicationContext();
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
ComponentName thisWidget = new ComponentName(context, FavMovieWidget.class);
int[] appWidgetIds = appWidgetManager.getAppWidgetIds(thisWidget);
appWidgetManager.notifyAppWidgetViewDataChanged(appWidgetIds, R.id.stack_view);

我已经尝试过的

Intent intent = new Intent(this, FavMovieWidget.class);       
intent.setAction(appWidgetManager.ACTION_APPWIDGET_UPDATE);
int[] ids = appWidgetManager.getAppWidgetIds(new ComponentName(getApplication(), FavMovieWidget.class));
intent.putExtra(appWidgetManager.EXTRA_APPWIDGET_IDS, ids);
sendBroadcast(intent);

小部件图像未更新 preview widget

【参考方案1】：

通过在 updateAppWidget 上添加这个来完成。 这将在我的服务上触发 onGetViewFactory。

Random random = new Random();
intent.setType(String.valueOf(random.nextInt(1000)));

并在我的活动中使用 sendbroadcast

Intent intent = new Intent(this, FavMovieWidget.class);       
intent.setAction(appWidgetManager.ACTION_APPWIDGET_UPDATE);
int[] ids = appWidgetManager.getAppWidgetIds(new ComponentName(getApplication(), FavMovieWidget.class));
intent.putExtra(appWidgetManager.EXTRA_APPWIDGET_IDS, ids);
sendBroadcast(intent);