要更新Android AppWidget的数据,请按照以下步骤操作:
public class MyAppWidgetProvider extends RemoteViewsService.RemoteViewsFactory {
// ...
}
@Override
public RemoteViews getView(int position, RemoteViews views, int parent) {
// TODO: 创建或更新视图
}
@Override
public int getCount() {
// 返回AppWidget中的视图数量
return 0;
}
@Override
public long getItemId(int position) {
// 返回每个视图的唯一ID
return 0;
}
private List<MyData> getData() {
// 从数据源获取数据并返回
}
private void updateAppWidget(Context context) {
// 获取数据
List<MyData> dataList = getData();
// 创建RemoteViews对象
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.my_appwidget_layout);
// 更新视图
views.setTextViewText(R.id.textView, dataList.get(position).getText());
// 将更新后的RemoteViews对象发送到AppWidgetManager
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
ComponentName componentName = new ComponentName(context, MyAppWidgetProvider.class);
appWidgetManager.updateAppWidget(componentName, views);
}
<receiver android:name=".MyAppWidgetProvider" android:exported="true">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="@xml/my_appwidget_info" />
</receiver>
当您的应用程序收到APPWIDGET_UPDATE动作的广播时,MyAppWidgetProvider类中的updateAppWidget()方法将被调用,从而更新AppWidget中的数据。