blocks|key|1173978|text|int+widgetIDs[]+=+AppWidgetManager.getInstance(getApplication()).getAppWidgetIds(new+ComponentName(getApplication(),+WidgetProvider.class));

for+(int+id+:+widgetIDs)
++++AppWidgetManager.getInstance(getApplication()).notifyAppWidgetViewDataChanged(id,+R.id.widget_view);
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1173979|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

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

for (int id : widgetIDs)
 AppWidgetManager.getInstance(getApplication()).notifyAppWidgetViewDataChanged(id, R.id.widget_view);
}
</code></pre>

blocks|key|959739|text|因此，要从活动中更新小部件，您可以这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|959740|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);|code-block|syntax|javascript|959741|适用于我:)|959742|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

So to update an widget from an activity, you can do it like this:

<pre><code>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);
</code></pre>

Works for me :)

blocks|key|959786|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|959787|int[]+ids+=+AppWidgetManager.getInstance(getApplication()).getAppWidgetIds(new+ComponentName(getApplication(),+MyWidget.class));
++++++++MyWidget+myWidget+=+new+MyWidget();
++++++++myWidget.onUpdate(this,+AppWidgetManager.getInstance(this),ids);|code-block|syntax|javascript|959788|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try this:

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

blocks|key|1174115|text|如果您正在使用使用ListView、GridView或StackView等集合的小部件来更新小部件的项，请执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1174116|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);|code-block|syntax|javascript|1174117|使用此方法notifyAppWidgetViewDataChanged()，您可以强制小部件项实时获取任何新数据。|1174118|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

In case you are working with a widget that uses a collection such as ListView, GridView, or StackView, to update the widget's items, do as follow:

<pre><code>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);
</code></pre>

With this method notifyAppWidgetViewDataChanged(), you can force the widget items to fetch any new data in real time.

blocks|key|959873|text|Phaethon在Kotlin中接受的解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|959874|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)|code-block|syntax|javascript|959875|其中MyAppWidgetProvider是从AppWidgetProvider派生的：|959876|MyAppWidgetProvider+:+AppWidgetProvider()+{|959877|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Phaethon's accepted solution in Kotlin:
<pre><code>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)
</code></pre>
Where MyAppWidgetProvider is derived from AppWidgetProvider:
<pre><code>MyAppWidgetProvider : AppWidgetProvider() {
</code></pre>

blocks|key|1174212|text|如果您试图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，则可以捕获YourWidgetProvider.class.getName()的输出并创建一个常量：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1174213|val+WIDGET_CLASS_NAME+=+"com.example.yourapplication.YourWidgetProvider"|code-block|syntax|javascript|1174214|然后，您将能够隐式地使用它：|1174215|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)|1174216|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

If you are trying to programmatically update the widget where you do not have access to YourWidgetProvider.class explicitly, e.g. from another module or library, you can capture what YourWidgetProvider.class.getName() outputs and create a constant:

<pre><code>val WIDGET_CLASS_NAME = "com.example.yourapplication.YourWidgetProvider"
</code></pre>

You would then be able to use this implicitly:

<pre><code>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)
</code></pre>

blocks|key|1174273|text|作为参考，我必须在片段中这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1174274|Application+app+=+getActivity().getApplication();
Intent+intent+=+new+Intent(context,+RQWidget.class);
intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);

int[]+ids+=+AppWidgetManager.getInstance(app).getAppWidgetIds(new+ComponentName(app,+RQWidget.class));
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS,+ids);
context.sendBroadcast(intent);|code-block|syntax|javascript|1174275|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For reference, I had to do like this in a fragment:
<pre><code>Application app = getActivity().getApplication();
Intent intent = new Intent(context, RQWidget.class);
intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);

int[] ids = AppWidgetManager.getInstance(app).getAppWidgetIds(new ComponentName(app, RQWidget.class));
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, ids);
context.sendBroadcast(intent);
</code></pre>

blocks|key|960011|text|我的待办事项列表中的示例：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|960012|Intent+intent+=+new+Intent(this,+TodosAppWidget.class);
intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
int[]+ids+=+AppWidgetManager.getInstance(getApplication()).getAppWidgetIds(new+ComponentName(getApplication(),+TodosAppWidget.class));
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS,+ids);
sendBroadcast(intent);|code-block|syntax|javascript|960013|sendBrodcast(Intent(this,+TodosAppWidget::class.java).apply+{
++action+=+AppWidgetManager.ACTION_APPWIDGET_UPDATE
++val+ids+=+AppWidgetManager.getInstance(application).getAppWidgetIds(ComponentName(application,+TodosAppWidget::class.java))
++putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS,+ids)
})|960014|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|D|7|M|8|@]|9|@]|A|$E|F]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Example from my to-do list:
<pre class="lang-java prettyprint-override"><code>Intent intent = new Intent(this, TodosAppWidget.class);
intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
int[] ids = AppWidgetManager.getInstance(getApplication()).getAppWidgetIds(new ComponentName(getApplication(), TodosAppWidget.class));
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, ids);
sendBroadcast(intent);
</code></pre>
<pre><code>sendBrodcast(Intent(this, TodosAppWidget::class.java).apply {
 action = AppWidgetManager.ACTION_APPWIDGET_UPDATE
 val ids = AppWidgetManager.getInstance(application).getAppWidgetIds(ComponentName(application, TodosAppWidget::class.java))
 putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, ids)
})
</code></pre>

I know it's possible, but I can't figure out a way to trigger an update of my widget from the main activity. Isn't there some general intent I can broadcast?

Programmatically update widget from activity/service/receiver

Kotlin

我知道这是可能的，但我想不出一种方法来从主活动中触发我的小部件的更新。有没有一些我可以广播的一般意图？

问从活动/服务/接收方以编程方式更新小部件
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