[android] Passing arguments to AsyncTask, and returning results

Change your method to look like this:

String curloc = current.toString();
String itemdesc = item.mDescription;
ArrayList<String> passing = new ArrayList<String>();
passing.add(itemdesc);
passing.add(curloc);
new calc_stanica().execute(passing); //no need to pass in result list

And change your async task implementation

public class calc_stanica extends AsyncTask<ArrayList<String>, Void, ArrayList<String>> {
ProgressDialog dialog;

    @Override
    protected void onPreExecute() {
        dialog = new ProgressDialog(baraj_mapa.this);
        dialog.setTitle("Calculating...");
        dialog.setMessage("Please wait...");
        dialog.setIndeterminate(true);
        dialog.show();
    }

    protected ArrayList<String> doInBackground(ArrayList<String>... passing) {
        ArrayList<String> result = new ArrayList<String>();
        ArrayList<String> passed = passing[0]; //get passed arraylist

        //Some calculations...

        return result; //return result
    }

    protected void onPostExecute(ArrayList<String> result) {
        dialog.dismiss();
        String minim = result.get(0);
        int min = Integer.parseInt(minim);
        String glons = result.get(1);
        String glats = result.get(2);
        double glon = Double.parseDouble(glons);
        double glat = Double.parseDouble(glats);
        GeoPoint g = new GeoPoint(glon, glat);
        String korisni_linii = result.get(3);
    }

UPD:

If you want to have access to the task starting context, the easiest way would be to override onPostExecute in place:

new calc_stanica() {
    protected void onPostExecute(ArrayList<String> result) {
      // here you have access to the context in which execute was called in first place. 
      // You'll have to mark all the local variables final though..
     }
}.execute(passing);

Examples related to android

Under what circumstances can I call findViewById with an Options Menu / Action Bar item? How to implement a simple scenario the OO way My eclipse won't open, i download the bundle pack it keeps saying error log getting " (1) no such column: _id10 " error java doesn't run if structure inside of onclick listener Cannot retrieve string(s) from preferences (settings) strange error in my Animation Drawable how to put image in a bundle and pass it to another activity FragmentActivity to Fragment A failure occurred while executing com.android.build.gradle.internal.tasks

Examples related to return

Method Call Chaining; returning a pointer vs a reference? How does Python return multiple values from a function? Return multiple values from a function in swift Python Function to test ping Returning string from C function "Missing return statement" within if / for / while Difference between return 1, return 0, return -1 and exit? C# compiler error: "not all code paths return a value" How to return a struct from a function in C++? Print raw string from variable? (not getting the answers)

Examples related to android-asynctask

Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference Android check null or empty string in Android java.net.UnknownHostException: Unable to resolve host "<url>": No address associated with hostname and End of input at character 0 of java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState Android basics: running code in the UI thread How to get the result of OnPostExecute() to main activity because AsyncTask is a separate class? Android. Fragment getActivity() sometimes returns null android asynctask sending callbacks to ui AsyncTask Android example Return a value from AsyncTask in Android

Examples related to progressdialog

ProgressDialog is deprecated.What is the alternate one to use? How to show progress dialog in Android? Show ProgressDialog Android ProgressDialog in AsyncTask Add a Progress Bar in WebView Passing arguments to AsyncTask, and returning results Can't create handler inside thread that has not called Looper.prepare() inside AsyncTask for ProgressDialog Custom Drawable for ProgressBar/ProgressDialog Android: ProgressDialog.show() crashes with getApplicationContext