我知道这是有可能的,但是我找不到从主要活动中触发小部件更新的方法。我没有可以广播的一般意图吗?
如果您are使用AppWidgetProvider
,则可以通过以下方式进行更新:
Intent intent = new Intent(this, MyAppWidgetProvider.class);
intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
// Use an array and EXTRA_APPWIDGET_IDS instead of AppWidgetManager.EXTRA_APPWIDGET_ID,
// since it seems the onUpdate() is only fired on that:
int[] ids = AppWidgetManager.getInstance(getApplication())
.getAppWidgetIds(new ComponentName(getApplication(), MyAppWidgetProvider.class));
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, ids);
sendBroadcast(intent);
当我搜索如何从服务/或操作中更新窗口小部件时(这可能有所帮助(但可能在每个上下文中都可以使用):
Context context = this;
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget_2x1);
ComponentName thisWidget = new ComponentName(context, MyWidget.class);
remoteViews.setTextViewText(R.id.my_text_view, "myText" + System.currentTimeMillis());
appWidgetManager.updateAppWidget(thisWidget, remoteViews);
因此要从活动中更新窗口小部件,您可以这样操作:
Intent intent = new Intent(this, DppWidget.class);
intent.setAction("android.appwidget.action.APPWIDGET_UPDATE");
int ids[] = AppWidgetManager.getInstance(getApplication()).getAppWidgetIds(new ComponentName(getApplication(), DppWidget.class));
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS,ids);
sendBroadcast(intent);
为我工作:)
尝试一下:
int[] ids = AppWidgetManager.getInstance(getApplication()).getAppWidgetIds(new ComponentName(getApplication(), MyWidget.class));
MyWidget myWidget = new MyWidget();
myWidget.onUpdate(this, AppWidgetManager.getInstance(this),ids);
如果您正在使用使用诸如ListView,GridView或StackView之类的集合的窗口小部件来更新窗口小部件的项目,请执行以下操作:
Context context = getApplicationContext();
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
ComponentName thisWidget = new ComponentName(context, StackWidgetProvider.class);
int[] appWidgetIds = appWidgetManager.getAppWidgetIds(thisWidget);
appWidgetManager.notifyAppWidgetViewDataChanged(appWidgetIds, R.id.stack_view);
使用此方法notifyAppWidgetViewDataChanged(),您可以强制窗口小部件项实时获取任何新数据。
int widgetIDs[] = AppWidgetManager.getInstance(getApplication()).getAppWidgetIds(new ComponentName(getApplication(), WidgetProvider.class));
for (int id : widgetIDs)
AppWidgetManager.getInstance(getApplication()).notifyAppWidgetViewDataChanged(id, R.id.widget_view);
}
仅获得一个AppWidgetManager
实例并直接对其进行更新。或者,如果您正在使用IntentService
进行更新,请在startService()
上调用IntentService
。 AppWidgetProvider
是更新应用程序小部件的a方法,但这不是唯一的方法。
Phaethon在Kotlin中接受的解决方案:
val intent = Intent(this, MyAppWidgetProvider::class.java)
intent.action = AppWidgetManager.ACTION_APPWIDGET_UPDATE
val ids = AppWidgetManager.getInstance(application).getAppWidgetIds(ComponentName(getApplicationContext(),MyAppWidgetProvider::class.java!!))
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, ids)
sendBroadcast(intent)
其中MyAppWidgetProvider是从AppWidgetProvider派生的:class MyAppWidgetProvider : AppWidgetProvider() {
如果您试图以编程方式更新您无权显式访问YourWidgetProvider.class的窗口小部件,例如从另一个模块或库中,可以捕获YourWidgetProvider.class.getName()的输出并创建一个常量:
val WIDGET_CLASS_NAME = "com.example.yourapplication.YourWidgetProvider"
您将可以隐式使用它:
val intent = Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE)
val widgetManager = AppWidgetManager.getInstance(context)
val ids = widgetManager.getAppWidgetIds(ComponentName(context, WIDGET_CLASS_NAME))
AppWidgetManager.getInstance(context).notifyAppWidgetViewDataChanged(ids, android.R.id.list)
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, ids)
context.sendBroadcast(intent)