java - Chronometer doesnt work in background - android studio

Question

package com.morrmat.radiowl;

import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.os.SystemClock;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.text.TextUtils;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Chronometer;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.morrmat.radiowl.player.PlaybackStatus;
import com.morrmat.radiowl.player.RadioManager;
import com.morrmat.radiowl.util.Shoutcast;
import com.morrmat.radiowl.util.ShoutcastHelper;
import com.morrmat.radiowl.util.ShoutcastListAdapter;

import org.greenrobot.eventbus.EventBus;
import org.greenrobot.eventbus.Subscribe;

import java.util.concurrent.TimeUnit;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;
import butterknife.OnItemClick;


public class MainActivity extends AppCompatActivity {

    //@BindView(R.id.toolbar)
    Toolbar toolbar;

    @BindView(R.id.playTrigger)
    ImageButton trigger;

   @BindView(R.id.listview)
    ListView listView;

    //@BindView(R.id.name)
    TextView textView;

    //@BindView(R.id.timertext)
   // TextView timerText;


   // @BindView(R.id.sub_player)
    View subPlayer;

    RadioManager radioManager;

    //fix start missing subplayer
    public static String radioName = null;
    String streamURL;
    int flag = 0;
    boolean isTimer;
    String oldurl = null;



    private long backPressedTime;
    private Toast backToast;
    int time=0;
    //CountDownTimer texttimer;
    boolean playingcheck;
    int set = 0;

    private Chronometer chronometer;
    private long pauseOffset;
    private boolean running;


    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        ButterKnife.bind(this);



        toolbar = findViewById(R.id.toolbar);
        textView = findViewById(R.id.name);
        subPlayer = findViewById(R.id.sub_player);

        setSupportActionBar(toolbar);

        radioManager = RadioManager.with(this);

        listView.setAdapter(new ShoutcastListAdapter(this, ShoutcastHelper.retrieveShoutcasts(this)));


/*
        texttimer = new  CountDownTimer (1000000000 * 10000, 1000) {


            public void onTick(long millisUntilFinished) {
                String hms = String.format("%02d:%02d:%02d", TimeUnit.SECONDS.toHours(time),
                        TimeUnit.SECONDS.toMinutes(time) - TimeUnit.HOURS.toMinutes(TimeUnit.SECONDS.toHours(time)),
                        TimeUnit.SECONDS.toSeconds(time) - TimeUnit.MINUTES.toSeconds(TimeUnit.SECONDS.toMinutes(time)));
                timerText.setText(hms);
                time++;

            }

            public void onFinish() {

            }
            public void stoptimer (){
                texttimer.cancel();
            }



        }; */

        chronometer = findViewById(R.id.chronometer);
        chronometer.setFormat("%s");
        chronometer.setBase(SystemClock.elapsedRealtime());
        chronometer.setOnChronometerTickListener(new Chronometer.OnChronometerTickListener() {
            @Override
            public void onChronometerTick(Chronometer chronometer) {
               /* if ((SystemClock.elapsedRealtime() - chronometer.getBase()) >= 100000000) {
                    chronometer.setBase(SystemClock.elapsedRealtime());
                    //Toast.makeText(MainActivity.this, "Bing!", Toast.LENGTH_SHORT).show();
                }*/
            }
        });
    }
    public void startChronometer() {
        if (!running) {
            chronometer.setBase(SystemClock.elapsedRealtime() - pauseOffset);
            chronometer.start();
            running = true;
        }
    }
    public void pauseChronometer() {
        if (running) {
            chronometer.stop();
            pauseOffset = SystemClock.elapsedRealtime() - chronometer.getBase();
            running = false;
        }
    }
    public void resetChronometer() {
        chronometer.setBase(SystemClock.elapsedRealtime());
        pauseOffset = 0;
    }






    public String checkDigit(int number) {
        return number <= 9 ? "0" + number : String.valueOf(number);
    }

    public void open(View view) {
        Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("https://www.morrmat.com"));
        startActivity(browserIntent);
    }

//craig's code for 3 dots
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();

        if (id == R.id.action_settings) {
            Intent browser = new Intent(Intent.ACTION_VIEW, Uri.parse("https://www.morrmat.com"));
            startActivity(browser);
        }
        return true;
    }

    //craig's code for 3 dots ends
    @Override
    public void onStart() {

        super.onStart();

        EventBus.getDefault().register(this);
        
    }

    @Override
    public void onPause() {
        startChronometer();
        super.onPause();
    }

    @Override
    public void onStop() {

        EventBus.getDefault().unregister(this);

        super.onStop();
        //texttimer.cancel();
        pauseChronometer();

    }

    @Override
    protected void onDestroy() {

        radioManager.unbind();
        super.onDestroy();
        Runtime.getRuntime().gc();
        finish();
        finishAffinity();
        System.exit(0);


    }

    @Override
    protected void onResume() {
        super.onResume();


        radioManager.bind();

    }

    @Override
    public void onBackPressed() {

        //finish();
        if (backPressedTime + 2000 > System.currentTimeMillis()) {
            backToast.cancel();
            super.onBackPressed();
            finish();
            return;
        } else {
            backToast = Toast.makeText(getBaseContext(), "Press BACK again to exit", Toast.LENGTH_SHORT);
            backToast.show();
        }
        backPressedTime = System.currentTimeMillis();
    }


    @Subscribe
    public void onEvent(String status){

        switch (status){

            case PlaybackStatus.LOADING:
                //texttimer.cancel();
                pauseChronometer();
                playingcheck = false;

                // loading

                break;

            case PlaybackStatus.PLAYING:
                //texttimer.cancel();
                pauseChronometer();
                playingcheck =true;
                set =1;
                startChronometer();
               // texttimer.start();
                break;

            case PlaybackStatus.ERROR:
                //texttimer.cancel();
                pauseChronometer();
                Toast.makeText(this, "-UNABLE TO STREAM-" + "
"+" STATION DOWN or NO INTERNET", Toast.LENGTH_LONG).show();

                playingcheck = false;
                time = 0;
                resetChronometer();
                break;
            case PlaybackStatus.STOPPED:
                //texttimer.cancel();
                pauseChronometer();
                playingcheck = false;
                 break;

            case PlaybackStatus.PAUSED:
                //texttimer.cancel();
                pauseChronometer();
                playingcheck =false;
                break;
            case PlaybackStatus.IDLE:
                //texttimer.cancel();
                pauseChronometer();
                playingcheck =false;
                break;



        }

        trigger.setImageResource(status.equals(PlaybackStatus.PLAYING)
                ? R.drawable.ic_pause_black
                : R.drawable.ic_play_arrow_black);

    }

    @OnClick(R.id.playTrigger)
    public void onClicked(){

        if(TextUtils.isEmpty(streamURL)) return;

        radioManager.playOrPause(streamURL);

        if(set==1){
        if (playingcheck =true){
            if (oldurl == streamURL){
                //texttimer.cancel();
                pauseChronometer();
                playingcheck = false;

            } else {
                //texttimer.cancel();
                pauseChronometer();
                time = 0;
                resetChronometer();
                //texttimer.start();
                startChronometer();
                playingcheck = true;

            }


        } else {
            if (!(oldurl == streamURL)){
                //texttimer.cancel();
                pauseChronometer();
                time = 0;
                resetChronometer();
                //texttimer.start();
                startChronometer();
                playingcheck = true;
                set =0;

            } else {
                //texttimer.cancel();
                pauseChronometer();
                //texttimer.start();
                startChronometer();
                playingcheck = true;

            }
        }}


    }



    @RequiresApi(api = Build.VERSION_CODES.M)
    @OnItemClick(R.id.listview)
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

        Shoutcast shoutcast = (Shoutcast) parent.getItemAtPosition(position);
        if (shoutcast == null) {

            return;

        }


        view.setPressed(true);

        radioName = shoutcast.getName();


        textView.setText(shoutcast.getName());
        trigger.setVisibility(View.VISIBLE);

        if (streamURL==null) {playingcheck=false; }
        streamURL = shoutcast.getUrl();

        if (oldurl != streamURL){Toast.makeText(this, "Loading " + radioName + "
" + " please wait.", Toast.LENGTH_SHORT).show();}


        radioManager.playOrPause(streamURL);

        if(set==1){
            if (playingcheck =true){
                if (oldurl == streamURL){
                    //texttimer.cancel();
                    pauseChronometer();
                    playingcheck = false;

                } else {
                    //texttimer.cancel();
                    pauseChronometer();
                    time = 0;
                    resetChronometer();
                    //texttimer.start();
                    startChronometer();
                    playingcheck = true;

                }


            } else {
                if (!(oldurl == streamURL)){
                    //texttimer.cancel();
                    pauseChronometer();
                    time = 0;
                    resetChronometer();
                    //texttimer.start();
                    startChronometer();
                    playingcheck = true;
                    set =0;

                } else {
                    //texttimer.cancel();
                    pauseChronometer();
                    //texttimer.start();
                    startChronometer();
                    playingcheck = true;

                }
            }}





       oldurl = streamURL;

    }


}

Answer 1

Waitting for answers