Question

对于许多时间回答的问题感到抱歉，但对我来说现在仍在工作： - （

我有以下活动代码：

public class WidgetProvider extends AppWidgetProvider {

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
    final int count = appWidgetIds.length;

    for (int i = 0; i < count; i++) {
        int widgetId = appWidgetIds[i];

        RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
                R.layout.simple_widget);

        Intent intent = new Intent(context, SimpleWidgetProvider.class);
        intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
        intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context,
                0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        new Weather(remoteViews).execute();
        remoteViews.setOnClickPendingIntent(R.id.actionButton, pendingIntent);
        appWidgetManager.updateAppWidget(widgetId, remoteViews);
    }
}

}

使用Async Weather类但这不起作用。 remoteViews中缺少值。

class Weather extends AsyncTask<Void, String, String> {

private RemoteViews remoteViews ;

public Weather(RemoteViews remoteViews) {
    this.remoteViews = remoteViews;
}

@Override
protected String doInBackground(Void... arg0) {
  return "COLD";
}

@Override
protected void onPostExecute(String temp) {
    remoteViews.setTextViewText(R.id.textView, temp);
}

Answer 1

您传递给RemoteViews的{{1}}当时将使用。在您的情况下，updateAppWidget()任务在Weather被使用之前甚至不会开始，因此您对RemoteViews的更改没有意义。

相反：

切换到RemoteViews，因为此处使用Thread没有价值，
在AsyncTask

updateAppWidget()

android小部件作为异步任务

1 个答案: