以编程方式从活动/服务/接收器更新小部件

Question

我知道这是可能的,但我无法找到一种方法来触发主要活动的小部件更新.我可以播放一些一般意图吗？

Answer 1

如果您正在使用AppWidgetProvider,您可以更新这样说:

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())
    .getAppWidgetI??ds(new ComponentName(getApplication(), MyAppWidgetProvider.class));
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, ids);
sendBroadcast(intent);

Answer 2

当我搜索如何从服务/或动作更新小部件时(这可能来自每个上下文),这有助于:

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);

Answer 3

因此,要从活动更新窗口小部件,您可以这样做:

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);

适合我:)

Answer 4

试试这个:

int[] ids = AppWidgetManager.getInstance(getApplication()).getAppWidgetIds(new ComponentName(getApplication(), MyWidget.class));
        MyWidget myWidget = new MyWidget();
        myWidget.onUpdate(this, AppWidgetManager.getInstance(this),ids);

Answer 5

如果您正在使用使用ListView,GridView或StackView等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目实时获取任何新数据.

Answer 6

int widgetIDs[] = AppWidgetManager.getInstance(getApplication()).getAppWidgetIds(new ComponentName(getApplication(), WidgetProvider.class));

for (int id : widgetIDs)
    AppWidgetManager.getInstance(getApplication()).notifyAppWidgetViewDataChanged(id, R.id.widget_view);
}

Answer 7

只需获取一个AppWidgetManager实例并直接更新它.或者,如果您使用的是IntentService做更新,调用startService()上IntentService.这AppWidgetProvider是一种更新app小部件的方法,但这不是唯一的方法.

Answer 8

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 派生自 AppWidgetProvider：

MyAppWidgetProvider : AppWidgetProvider() {

Answer 9

如果您尝试以编程方式更新无法显式访问 YourWidgetProvider.class 的小部件（例如从另一个模块或库），您可以捕获 YourWidgetProvider.class.getName() 输出并创建一个常量：

val WIDGET_CLASS_NAME = "com.example.yourapplication.YourWidgetProvider"

然后您就可以隐式地使用它：

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)