我有一个小部件(appwidgetprovider + 服务)
这个服务基本上通过以下方式更新UI:
一切正常工作,没有使用我的静态方法设置PendingIntent到id,setPendingIntentForAllWidgetSubView。以下是代码:
如果我使用它,这是我得到的NPE:(第283行与manager.updateAppWidget(widget, views);有关)
此文段为英语,大意为:
此外,我确定在 manager.updateAppWidget(widget, views) 指令中 widget 和 views 不为空。那么我在设置 pendingIntent 时做错了什么???
任何帮助都将不胜感激!!!CD。
根据作者的说法,下面是可行的解决方案。
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget);
//doing some stuff like which works without any errors :
views.setTextViewText(R.id.Time, time);
// Here I'm calling a static method that set pendingIntent on different ID :
// With it : Null Pointer Exception, without not.
views = HomeWidgetUtils.setPendingIntentForAllWidgetSubView(context, views);
//update AppWidgetProvider :
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
ComponentName thisAppWidget = new ComponentName(context, WDWidgetProvider.class);
manager.updateAppWidget(widget, views);
一切正常工作,没有使用我的静态方法设置PendingIntent到id,setPendingIntentForAllWidgetSubView。以下是代码:
public static RemoteViews setPendingIntentForAllWidgetSubView(Context context,RemoteViews rv){
rv.setOnClickPendingIntent(R.id.Widget, HomeWidgetUtils.getPendingIntentonActivity(context, WeatherForecast.class));
rv.setOnClickPendingIntent(R.id.globallayout, HomeWidgetUtils.getPendingIntentonActivity(context, TabActivity01.class));
return rv;
}
public static PendingIntent getPendingIntentonActivity(Context context,Class C) {
Intent intentleft = new Intent(context, C);
intentleft.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
return PendingIntent.getActivity(context, 1, intentleft,PendingIntent.FLAG_UPDATE_CURRENT);
}
如果我使用它,这是我得到的NPE:(第283行与manager.updateAppWidget(widget, views);有关)
java.lang.NullPointerException
at android.widget.RemoteViews$SetOnClickPendingIntent.writeToParcel(RemoteViews.java:131)
at android.widget.RemoteViews.writeToParcel(RemoteViews.java:1003)
at com.android.internal.appwidget.IAppWidgetService$Stub$Proxy.updateAppWidgetIds(IAppWidgetService.java:374)
at android.appwidget.AppWidgetManager.updateAppWidget(AppWidgetManager.java:246)
at fr.cdcorp.homewidget.clock.ClockWidgetService.update(ClockWidgetService.java:283)
at fr.cdcorp.homewidget.clock.ClockWidgetService$1.onReceive(ClockWidgetService.java:312)
at android.app.ActivityThread$PackageInfo$ReceiverDispatcher$Args.run(ActivityThread.java:892)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4627)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
at dalvik.system.NativeStart.main(Native Method)
此文段为英语,大意为:
此外,我确定在 manager.updateAppWidget(widget, views) 指令中 widget 和 views 不为空。那么我在设置 pendingIntent 时做错了什么???
任何帮助都将不胜感激!!!CD。
根据作者的说法,下面是可行的解决方案。
public static PendingIntent getPendingIntentonActivity(Context context,Class C) {
PendingIntent mPendingIntent = null;
Intent mIntent = new Intent(Intent.ACTION_MAIN).addCategory(
Intent.CATEGORY_LAUNCHER);
ComponentName cn = new ComponentName(context, C);
mIntent.setComponent(cn);
return PendingIntent.getActivity(context, 0, mIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
}