Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trialMilos Ribera
9,633 PointsI don't know why it is not working. Anyone can help me?
I'm stuck on stopping the service, but I don't know what I'm doing wrong. If I put stopSelf() method with no arg it returns NullPointerExeption, so I put startId value for Message.arg1 to handle it into the Handler but it's not working. Anyone want to help me, can explain the reasons in order to clarify me the concept. Thank you in advance!
public class TwitterService extends Service {
TwitterClient twitterClient = new TwitterClient();
TwitterThread thread;
@Override
public void onCreate(){
thread = new TwitterThread();
thread.start();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId){
Message message = Message.obtain();
message.arg1 = startId;
thread.twitterHandler.sendMessage(message);
return Service.START_REDELIVER_INTENT;
}
@Override
public IBinder onBind(Intent intent){
return null;
}
class TwitterThread extends Thread {
TwitterHandler twitterHandler;
@Override
public void run() {
Looper.prepare();
twitterHandler = new TwitterHandler();
Looper.loop();
}
}
class TwitterHandler extends Handler {
TwitterService service;
@Override
public void handleMessage(Message msg) {
twitterClient.update();
service.stopSelf(msg.arg1);
}
}
}
public class MainActivity extends Activity {
Button button;
@Override
public void onCreate(Bundle savedInstanceState) {
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.update_button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v){
Intent intent = new Intent(MainActivity.this, TwitterService.class);
startService(intent);
}
});
}
}