如何更新依赖于AsyncTask的小部件

Question

I am creating a widget that needs to make a network connection to update its information.

I'm pretty much using Android Studio boilerplate template for Widgets, and its onUpdate method comes with this:

public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
    // There may be multiple widgets active, so update all of them
    final int N = appWidgetIds.length;
    for (int i = 0; i < N; i++) {
        updateAppWidget(context, appWidgetManager, appWidgetIds[i]);
    }
}

where updateAppWidget is a static function.

The problem is that I'm making use of AsyncTask to make a network connection, retrieve some data and update the widget's its values:

private class APIQuery extends AsyncTask<Connection, Integer, String> {

    @Override
    protected String doInBackground(Connection... params) {
     // ...
    }
}

The problem is inside updateAppWidget because if I try to instantiate APIQuery from within updateAppWidget , Android Studio says that I cannot call a non-static method from a static method.

Based on this answer:

calling non-static method in static method in Java

The only way to call a non-static method is by instantiating the class, but if I instantiate APIQuery, then Android says that I have to either make updateAppWidget non-static, or APIQuery static.

What is the right way to approach this situation? I'm new to Java and Android development, and learning as I go.

Answer 1

您可以尝试从异步任务的onPostExecute方法更新窗口小部件，也可以使用广播接收器向托管活动发送信号以更新窗口小部件