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我在更新服务中的AppWidget时遇到问题。这个问题对我来说似乎完全不合逻辑,所以我做了一个TestService来查找错误。 这是我testlayout我使用:为什么SystemClock.sleep(x)阻止更新AppWidget?
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView android:id="@+id/testText"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Hello World"/>
</LinearLayout>
onStart(Intent, startid)
被如下实施:
@Override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
Log.d(TAG, "onStart Service with StartId: " + startId);
mStartId = startId;
int widgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
if (intent != null && intent.hasExtra(AppWidgetManager.EXTRA_APPWIDGET_ID)){
widgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
AppWidgetManager.INVALID_APPWIDGET_ID);
}
if (widgetId == AppWidgetManager.INVALID_APPWIDGET_ID){
Log.d(TAG, "invalif AppWidgetId");
stopSelf();
}
RemoteViews mRemoteViews = new RemoteViews(getPackageName(), R.layout.testlayout);
mRemoteViews.setTextViewText(R.id.testText, "someText");
AppWidgetManager.getInstance(this).updateAppWidget(widgetId, mRemoteViews);
SystemClock.sleep(1000);
mRemoteViews.setTextViewText(R.id.testText, "text after delay");
AppWidgetManager.getInstance(this).updateAppWidget(widgetId, mRemoteViews);
}
在此实现,由此产生的Widget始终文字: “SomeText” 则会,但它应该是“文本延迟后“在我的观点。如果我删除那条线SystemClock.sleep(1000)
,我会得到“延迟后的文本”。为什么是这样? (已测试)Samsung Galaxy Nexus(4.1.1)