passing string data from onPostExecute method of AsyncTask to another Activity

Question

How to pass the string data like name,address that we obtained in onPostExecute() method of AsyncTask to another activity that will receive this string data ?

for example

I want to pass string name, url that I got in onPostExecute() method and then transfer these string data to another activity via dosomething() function and start that activity.

package info.androidhive.slidingmenu;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.net.HttpURLConnection;
 import java.net.URL;
 import java.util.HashMap;

  import org.json.JSONObject;



ProgressDialog pDialog;



protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_place_details);

    // Getting reference to WebView ( wv_place_details ) of the layout activity_place_details
    mWvPlaceDetails = (WebView) findViewById(R.id.wv_place_details);

    mWvPlaceDetails.getSettings().setUseWideViewPort(false);

    // Getting place reference from the map
    String reference = getIntent().getStringExtra("reference");

    StringBuilder sb = new StringBuilder("https://maps.googleapis.com/maps/api/place/details/json?");
    sb.append("reference="+reference);
    sb.append("&sensor=true");
    sb.append("&key=AIzaSyChVcy-8fLkAq5-ZJCuNomF1lIf-Gda7s8");

    // Creating a new non-ui thread task to download Google place details
    PlacesTask placesTask = new PlacesTask();

    // Invokes the "doInBackground()" method of the class PlaceTask
    placesTask.execute(sb.toString());

};

/** A method to download json data from url */
private String downloadUrl(String strUrl) throws IOException{
    String data = "";
    InputStream iStream = null;
    HttpURLConnection urlConnection = null;
    try{
        URL url = new URL(strUrl);

        // Creating an http connection to communicate with url
        urlConnection = (HttpURLConnection) url.openConnection();

        // Connecting to url
        urlConnection.connect();

        // Reading data from url
        iStream = urlConnection.getInputStream();

        BufferedReader br = new BufferedReader(new InputStreamReader(iStream));

        StringBuffer sb = new StringBuffer();

        String line = "";
        while( ( line = br.readLine()) != null){
            sb.append(line);
        }

        data = sb.toString();
            br.close();

    }catch(Exception e){
        Log.d("Exception while downloading url", e.toString());
    }finally{
        iStream.close();
        urlConnection.disconnect();
    }
    return data;
}
/** A class, to download Google Place Details */
private class PlacesTask extends AsyncTask<String, Integer, String>{

     /**
     * Before starting background thread Show Progress Dialog
     * */
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(PlaceDetailsActivity.this);
        pDialog.setMessage("Loading Restaurent Details ...");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(false);
        pDialog.show();
    }
    String data = null;

    // Invoked by execute() method of this object
    @Override
    protected String doInBackground(String... url) {
        try{
            data = downloadUrl(url[0]);
        }catch(Exception e){
            Log.d("Background Task",e.toString());
        }
        return data;
    }

    // Executed after the complete execution of doInBackground() method
    @Override
    protected void onPostExecute(String result){
        ParserTask parserTask = new ParserTask();

        // Start parsing the Google place details in JSON format
        // Invokes the "doInBackground()" method of the class ParseTask
        parserTask.execute(result);
    }
}

/** A class to parse the Google Place Details in JSON format */
private class ParserTask extends AsyncTask<String, Integer, HashMap<String,String>>{

    JSONObject jObject;

    // Invoked by execute() method of this object
    @Override
    protected HashMap<String,String> doInBackground(String... jsonData) {

        HashMap<String, String> hPlaceDetails = null;
        PlaceDetailsJSONParser placeDetailsJsonParser = new PlaceDetailsJSONParser();

        try{
            jObject = new JSONObject(jsonData[0]);

            // Start parsing Google place details in JSON format
            hPlaceDetails = placeDetailsJsonParser.parse(jObject);

        }catch(Exception e){
            Log.d("Exception",e.toString());
        }
        return hPlaceDetails;
    }

    // Executed after the complete execution of doInBackground() method
    @Override
    protected void onPostExecute(HashMap<String,String> hPlaceDetails){

        // dismiss the dialog after getting all products
        pDialog.dismiss();

        String name = hPlaceDetails.get("name");
        String icon = hPlaceDetails.get("icon");
        String vicinity = hPlaceDetails.get("vicinity");
        String lat = hPlaceDetails.get("lat");
        String lng = hPlaceDetails.get("lng");
        String formatted_address = hPlaceDetails.get("formatted_address");
        String formatted_phone = hPlaceDetails.get("formatted_phone");
        String website = hPlaceDetails.get("website");
        String rating = hPlaceDetails.get("rating");
        String international_phone_number = hPlaceDetails.get("international_phone_number");
        String url = hPlaceDetails.get("url");





        String mimeType = "text/html";
        String encoding = "utf-8";

        String data = "<html>"+
                      "<body><img style='float:left' src="+icon+" /><h1><center>"+name+"</center></h1>" +
                      "<br style='clear:both' />" +
                      "<hr />"+
                      //"<p>Vicinity : " + vicinity + "</p>" +
                      //"<p>Location : " + lat + "," + lng + "</p>" +
                      "<p>Address : " + formatted_address + "</p>" +
                      "<p>Phone : " + formatted_phone + "</p>" +
                      "<p>Website : " + website + "</p>" +
                      "<p>Rating : " + rating + "</p>" +
                      "<p>International Phone : " + international_phone_number + "</p>" +
                      "<p>Reviews(Please Open in Web browser) : <a href='" + url + "'>" + url + "</p>" +
                      "</body></html>";

        // Setting the data in WebView
        mWvPlaceDetails.loadDataWithBaseURL("", data, mimeType, encoding, "");
    }
}


public void dosomething(View v)
{


 if (v.getId()==R.id.button1)
 {

 }
 else if (v.getId()==R.id.button2)
 {



 }
 else if (v.getId()==R.id.button3)
 {

 }

}
}

Any help is appreciated !

http://stackoverflow.com/questions/8802157/how-to-use-localbroadcastmanager — Rohit Sharma, Aug 16 '14 at 10:08

score 1 · Answer 1 · answered Aug 15 '14 at 22:21

That would really depend on how you implemented the AsyncTask.

My assumption is based in that you probably called task.execute(); from the first activity.

I would suggest you make a constructor for the task that takes the context of your first activity as a parameter.

Then, you call

Intent intent = new Intent(context, NewActivity.class);
intent.putString("SOME_KEY", resultString);
context.startActivity(intent);

In the activity, pull it back out of the bundle and use it.

score 0 · Answer 2 · answered Aug 16 '14 at 09:53

You can do the following: This will start the SecondActivity with all the data provided in the HashMap from your AsyncTask.

public class ParserTask extends AsyncTask<String, Integer, HashMap<String,String>> {

    @Override
    protected HashMap<String,String> doInBackground(Void... jsonData) {
        HashMap<String,String> data = null;
        // TODO get your data
        return data;
    }

    @Override
    protected void onPostExecute(HashMap<String,String> data) {
        super.onPostExecute(data);
        doSomething(data);
    }
}

public void doSomething(HashMap<String,String> data) {
    Intent intent = new Intent(this, SecondActivity.class);
    Bundle bundle = new Bundle();
    Set<Entry<String,String>> entrySet = data.entrySet();
    for (Entry<String, String> entry : entrySet) {
        bundle.putString(entry.getKey(), entry.getValue());
    }
    intent.putExtras(bundle);
    startActivity(intent);
}

heyy simon friend check it :http://stackoverflow.com/questions/25341208/passing-string-data-from-onpostexecute-method-of-asynctask-to-other-activity — user3930098, Aug 16 '14 at 14:39

passing string data from onPostExecute method of AsyncTask to another Activity

2 Answers2