// AsyncTask
package com.test.testing;
//imports 
public class Update_Score extends AsyncTask<Void, Void, Void> {
    String result="vvv",
            name,
            score,
            lastTest,
            maximum;
    ProgressBar loading;
    TextView text;
    Context context;
    @Override
    protected Void doInBackground(Void... voids) {
        String strUrl="http://test.tk/updatesomething.php";
        while (result=="vvv") {
            try {
                URL url = new URL(strUrl);
                HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();
                httpConnection.setRequestMethod("POST");
                httpConnection.setDoOutput(true);
                httpConnection.setDoInput(true);
                //output
                OutputStream output = httpConnection.getOutputStream();
                BufferedWriter writer=new BufferedWriter(new OutputStreamWriter(output,"UTF-8"));
                String post_data= URLEncoder.encode("name","UTF-8")+"="+URLEncoder.encode(name,"UTF-8")+"&"
                        +URLEncoder.encode("score","UTF-8")+"="+URLEncoder.encode(score,"UTF-8")+"&"
                        +URLEncoder.encode("lastTest","UTF-8")+"="+URLEncoder.encode(lastTest,"UTF-8");
                writer.write(post_data);
                writer.flush();
                writer.close();
                output.close();
                //input
                InputStream input = httpConnection.getInputStream();
                BufferedReader reader=new BufferedReader(new InputStreamReader(input,"iso-8859-1"));
                result="";
                String line="";
                while ((line=reader.readLine())!=null){
                    result += line;
                }
                reader.close();
                input.close();
                httpConnection.disconnect();
            } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) {
                e.printStackTrace();
            }
        }
        new AlertDialog.Builder(context).setMessage("updateEnd").create().show();
        return null;
    }
}
// Calling AsyncTask
package com.test.testing;
//imports
public class Final_Score extends AppCompatActivity {
    public TextView score;
    public ProgressBar loading;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_final__score);
        initVar();
        String totalMark =getIntent().getStringExtra("TOTAL_MARKS"),
                name =getIntent().getStringExtra("NAME") ,
                lastTest =getIntent().getStringExtra("TESTNUM"),
                maximum =getIntent().getStringExtra("MAX");
        boolean forced=getIntent().getBooleanExtra("FORCED",false);
        if(forced){
            new AlertDialog.Builder(this).setMessage("Time Up").setTitle("").create().show();
        }
        score.setText(totalMark);
        Update_Score update=new Update_Score(name,totalMark,lastTest,loading,this,score,maximum);
        update.execute();
    }
}

while(!mainActivity.timeNotEnds){
   //some stuff here
   if (time==previouslySpecifiedTime){
       break;
   }