如何更新Android appwidget的UI

public class MyWidgetProvider extends AppWidgetProvider {

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        for (int appWidgetId : appWidgetIds) {
            RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_layout);

            // 更新UI，设置文本、图片等内容
            views.setTextViewText(R.id.widget_text, "Hello, Widget!");
            views.setImageViewResource(R.id.widget_image, R.drawable.widget_icon);

            // 设置点击事件
            Intent intent = new Intent(context, MainActivity.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
            views.setOnClickPendingIntent(R.id.widget_layout, pendingIntent);

            // 更新AppWidget的UI
            appWidgetManager.updateAppWidget(appWidgetId, views);
        }
    }
}

<receiver android:name=".MyWidgetProvider">
    <intent-filter>
        <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
    </intent-filter>
    <meta-data
        android:name="android.appwidget.provider"
        android:resource="@xml/widget_info" />
</receiver>