Jeg bruker ikke Json enda, men det fungerer :)



    //Fra MainActivity
    public void loginPost(View view){
        String test = "test";
        TextView helloText = (TextView)findViewById(R.id.helloText);
        //method.setText("Post Method");
        new DBActivity(this,helloText,1).execute(test);
    }
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package no.mosern.testapp;

/**
 * Created by Andreas E. Mosvoll on 28.05.2015.
 */
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URI;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import android.content.Context;
import android.os.AsyncTask;
import android.widget.TextView;

public class DBActivity  extends AsyncTask<String,Void,String> {
    private TextView test;
    private Context context;

    //flag 0 means get and 1 means post.(By default it is get.)
    public DBActivity(Context context, TextView test) {
        this.context = context;
        this.test = test;
    }

    protected void onPreExecute() {

    }

    @Override
    protected String doInBackground(String... arg0) {

            try {
                String test = (String) arg0[0];

                String link = "http://kark.hin.no/~530324/androidTest/androidTest.php";
                String data = URLEncoder.encode("testString", "UTF-8") + "=" + URLEncoder.encode(test, "UTF-8");

                URL url = new URL(link);
                URLConnection conn = url.openConnection();

                conn.setDoOutput(true);
                OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());

                wr.write(data);
                wr.flush();

                BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));

                StringBuilder sb = new StringBuilder();
                String line = null;

                // Read Server Response
                while ((line = reader.readLine()) != null) {
                    sb.append(line);
                    break;
                }
                return sb.toString();
            } catch (Exception e) {
                return new String("Exception: " + e.getMessage());
            }
    }

    @Override
    protected void onPostExecute(String result) {
        this.test.setText(result);
    }
}