increment progressDialog from Thread inside service

increment progressDialog from Thread inside service

i want to increment a progress dialog from a thread inside a service, i
have really hard time doing that, this is my code please help me.
I tried many different ways including asyncTask (I had problem with
context) and tried with static functions but its not working properly, I
pretty new with android please explain me the problem here.
the activity
public class MainActivity extends Activity {
ProgressDialog progressBar;
private void showProgrssBar() {
progressBar.show();
}
private void dismissProgressBar() {
progressBar.dismiss();
}
private void increaseProgressBar(int total) {
progressBar.incrementProgressBy(total);
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent n = new Intent(this, myService.class);
startService(n);
}
the service:
public class myService extends Service
{
private myThread myThread;
Handler handler = new Handler()
{
@Override
public void handleMessage(android.os.Message msg)
{
int total = msg.getData().getInt("total");
if (total == -1)
{
dismissProgressBar();
}
else if (total == 0)
{
showProgrssBar();
}
else
{
increaseProgressBar(total);
}
}
};
@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
myThread = new myThread(handler);
myThread.start();
return START_STICKY;
}
the thread
class myThread extends Thread
`{
Handler h;
int numOfLinesToRead = 220;
int line = 0;`
public myThread(Handler h)
{
this.h = h;
}
private void increaseProgressBarOnActivity(int i_MsgType)
{
Message msg = h.obtainMessage();
Bundle b = new Bundle();
b.putInt("total", i_MsgType);
msg.setData(b);
h.sendMessage(msg);
}
@Override
public void run() {
super.run();
int increase;
try
{
Thread.sleep(1);
}
catch (InterruptedException e)
{
e.printStackTrace();
}
for (; line < 220; line++)
{
increase = (line*100/numOfLinesToRead);
if (increase != 0)
{
increaseProgressBarOnActivity(increase);
try
{
Thread.sleep(90);
}
catch (InterruptedException e)
{
e.printStackTrace();
}
}
}
}
}