TextView没有在android应用部件中得到更新
我正在使用asynctask来完成我的功能并获取值。 但我的文本视图没有得到更新,但我的日志语句给了我结果。
我不是在这里使用自定义的意图,只是基本的意图。
这里是我的代码片段:
public class ListViewWidget extends AppWidgetProvider{
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
int[] appWidgetIds) {
super.onUpdate(context, appWidgetManager, appWidgetIds);
updateViews = new RemoteViews(context.getPackageName(), R.layout.list_layout);
thisWidget = new ComponentName(context, ListViewWidget.class);
FetchTask fetchTask=new FetchTask();
AppWidgetManager.getInstance(context.getApplicationContext());
fetchTask.execute();
}
//FetchTask
public static class FetchTask extends AsyncTask<URL,Integer,String> implements ServerRequestEnvironment{
protected String doInBackground(URL... arg0) {
//logic part and stuff not entered
//This is the end part that returns me the result, which is not getting printed to text view.
String name="";
int i = new Random().nextInt(27);
storeObject=store.getStores().getItems().get(i).getStore();
name= storeObject.getName();
resultStuff(name);
Log.i("StoreTag","storeval:"+name); //returns name of the 0th item
return name;
}//end of doInBackground() method
protected void onPostExecute(String name) {
// TODO Auto-generated method stub
Intent intent=new Intent("android.appwidget.action.APPWIDGET_UPDATE");
PendingIntent pendingIntent=PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
updateViews.setTextViewText(R.id.text_view,resultStuff(name));
updateViews.setOnClickPendingIntent(R.id.next, pendingIntent);
AppWidgetManager manager = AppWidgetManager.getInstance(context.getApplicationContext());
manager.updateAppWidget(thisWidget, updateViews);
}//end of PostExecute
}//End of async task class
}//end of ListViewWidget class
我在这里错过了什么? 请指导..
更新:这很好吗? 要在onReceive和onUpdate中调用异步任务?
@Override public void onReceive(Context context,Intent intent){
if(intent.getAction().equals("android.appwidget.action.APPWIDGET_UPDATE")){
fetchTask.execute();
}
}
更新2:
public static String name="New text"
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
int[] appWidgetIds) {
super.onUpdate(context, appWidgetManager, appWidgetIds);
updateViews = new RemoteViews(context.getPackageName(), R.layout.list_layout);
//-----------NEW LINE ADDED-------------
updateViews.setTextViewText(R.id.text_view,name);
thisWidget = new ComponentName(context, ListViewWidget.class);
//Now in onPostExecute()
//AppWidgetManager manager = AppWidgetManager.getInstance(context.getApplicationContext());
//manager.updateAppWidget(thisWidget, updateViews);
fetchTask.execute();
}
protected void onPostExecute(String name) {
// TODO Auto-generated method stub
Intent intent=new Intent("android.appwidget.action.APPWIDGET_UPDATE");
PendingIntent pendingIntent=PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
updateViews.setTextViewText(R.id.text_view,name);
updateViews.setOnClickPendingIntent(R.id.next, pendingIntent);
AppWidgetManager manager = AppWidgetManager.getInstance(context.getApplicationContext());
manager.updateAppWidget(thisWidget, updateViews);
}
@Dororo没有得到你。 请解释。 我在我的课堂上创建了公共变量:
public static Context context;
public static RemoteViews updateViews;
public static ComponentName thisWidget;
FetchTask fetchTask=new FetchTask();
你有没有尝试过使用这个:
TextView textView = (TextView) findViewById(R.id.textView);
textView.setText(toThis);
当你创建new ComponentName(context, ListViewWidget.class);
时,你确定没有覆盖更新的值new ComponentName(context, ListViewWidget.class);
? 当您调用manager.updateAppWidget(thisWidget, updateViews);
时, onUpdate
将被调用manager.updateAppWidget(thisWidget, updateViews);
你不需要使用static
,你只需要一个初始化boolean
,它在你第一次创建对象后被设置为true
。
解决了我的例外和错误。 设置上下文为空。 我为应用程序上下文分配了上下文。
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