Android Widget with asynctask

Question

public class MainActivity extends AppWidgetProvider
 {

    TextView tv;
RemoteViews views;
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {

        super.onUpdate(context,appWidgetManager,appWidgetIds);
        for(int i=0; i<appWidgetIds.length; i++){
            int currentWidgetId = appWidgetIds[i];

            views = new RemoteViews(context.getPackageName(),R.layout.activity_main);
            appWidgetManager.updateAppWidget(currentWidgetId,views);
            new PostTask().execute("url");

        }
   }

private class PostTask extends AsyncTask<String, String, String> {


    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    @Override
    protected String doInBackground(String... params) {
        String url = params[0];

        // Dummy code

        OkHttpClient client = new OkHttpClient();
        client.setConnectTimeout(1, TimeUnit.MINUTES); // connect timeout
        client.setReadTimeout(1, TimeUnit.MINUTES);    // socket timeout

        MediaType mediaType = MediaType.parse("application/x-www-form-urlencoded");
        RequestBody body = RequestBody.create(mediaType, "data=something");
        Request request = new Request.Builder()
                .url(url)
                .post(body)
                .addHeader("cache-control", "no-cache")
                .addHeader("postman-token", "7a4d5df8-5aed-19bf-e1fb-c85f821c1d10")
                .addHeader("content-type", "application/x-www-form-urlencoded")
                .build();
        Response response = null;
        try {
            response = client.newCall(request).execute();
            return response.body().string();
        } catch (Exception e1) {
            e1.printStackTrace();
            return e1.toString();
        }
    }

    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);

        String data = "";
        try {
            JSONObject jsonRootObject = new JSONObject(result);

            //Get the instance of JSONArray that contains JSONObjects
            JSONArray jsonArray = jsonRootObject.optJSONArray("response_data");

            //Iterate the jsonArray and print the info of JSONObjects
            for (int i = 0; i < jsonArray.length(); i++) {
                JSONObject jsonObject = jsonArray.getJSONObject(i);

                int id = Integer.parseInt(jsonObject.optString("CDRId").toString());
                String name = jsonObject.optString("Status").toString();

                data += "Agent : " + (i + 1) + "\nCDRId : " + id + " \n Status : " + name + " \n ";
            }
            views.setTextViewText(R.id.tv,data);
        } catch (Exception e) {
            views.setTextViewText(R.id.tv,e.toString());
        }


    }
}

}

I am trying to get a part of JSON(that I have parsed previously) in a widget. I am using AsyncTask to separate it from main thread and I am using OkHttpClient library to get JSON. I have class PostTask that gets me the parsed JSON. But can please anyone tell me how can I display it in the widget. This is the code.

Answer 1

Create a custom event, something like this:

public class MyEvent {
private String text;

public MyEvent(String text) {
    this.text = text;
}

public String getText() {
    return text;
}

public void setText(String text) {
    this.text= text;
}

}

Now at the place where you're posting the Event, simply create this custom Event with the json you want to send to your widget. (put this code in onPostExecute ).

EventBus.getDefault().post(new MyEvent(result);

Now simply wherever your textView is, in Activity or Fragment, register the eventBus in onCreate :

EventBus.getDefault().register(this);

And create a method that listens for the event like this:

@Subscribe
public void onMyEvent(MyEvent myEvent){
    String text = myEvent.getText();
    //Now you can parse this text, if it's JSON, or you can simply set it
    //to your textView or whatever
}