Updating Textview in an Activity with Local Service

android, service, textview

Solution

please see this flow.

1.in your LocationService class when you want to update UI. in your case it should be called every 30 seconds.

Intent i = new Intent("LOCATION_UPDATED");
i.putExtra("<Key>","text");

sendBroadcast(i);

2.in your UI (HomeActivity) class

in onCreate()

registerReceiver(uiUpdated, new IntentFilter("LOCATION_UPDATED"));

in class

private BroadcastReceiver uiUpdated= new BroadcastReceiver() {

    @Override
    public void onReceive(Context context, Intent intent) {

        TextView.setText(intent.getExtras().getString("<KEY>"))

    }
};

in onDestroy()

unregisterReceiver(uiUpdated);

Problem

I have an Activity with R.id.eventDistance and R.id.eventTime to display the distance & travel time based on current location. I calculate these values every 30 seconds using my Location Service class. My question is: how do I update the TextView in Activity? I've tried looking up the question and found some possible solutions such as using a BroadcastReceiver and call TextView.setText() in the onReceive() method. I'm not sure how this is done. Am I supposed to pass in the Activity class like this: ``` public class MyReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { Intent i = new Intent(context, HomeActivity.class); } } ``` I'm not sure what to do after that. Any help is appreciated.

Original source