Service Implementation:
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Random;
public class LocalWordService extends Service {
private final IBinder mBinder = new MyBinder();
private List<String> resultList = new ArrayList<String>();
private int counter = 1;
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
addResultValues();
return Service.START_NOT_STICKY;
}
@Override
public IBinder onBind(Intent intent) {
addResultValues();
return mBinder;
}
public class MyBinder extends Binder {
LocalWordService getService() {
return LocalWordService.this; //--> This will return the //service handle
}
}
public List<String> getWordList() {
return resultList;
}
private void addResultValues() {
Random random = new Random();
List<String> input = Arrays.asList("Linux", "Android","iPhone","Windows7" );
resultList.add(input.get(random.nextInt(3)) + " " + counter++);
if (counter == Integer.MAX_VALUE) {
counter = 0;
}
}
}
Activity Implementation:
import android.app.ListActivity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends ListActivity implements ServiceConnection {
private LocalWordService s;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
wordList = new ArrayList<String>();
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, wordList);
setListAdapter(adapter);
}
@Override
protected void onResume() {
super.onResume();
Intent intent= new Intent(this, LocalWordService.class);
bindService(intent, this, Context.BIND_AUTO_CREATE);
}
@Override
protected void onPause() {
super.onPause();
unbindService(this);
}
private ArrayAdapter<String> adapter;
private List<String> wordList;
public void onClick(View view) {
switch (view.getId()) {
case R.id.updateList:
if (s != null) {
Toast.makeText(this, "Number of elements" + s.getWordList().size(),
Toast.LENGTH_SHORT).show();
wordList.clear();
wordList.addAll(s.getWordList());
adapter.notifyDataSetChanged();
}
break;
case R.id.triggerServiceUpdate:
Intent service = new Intent(getApplicationContext(), LocalWordService.class);
getApplicationContext().startService(service);
break;
}
}
@Override
public void onServiceConnected(ComponentName name, IBinder binder) {
LocalWordService.MyBinder b = (LocalWordService.MyBinder) binder;
s = b.getService();
Toast.makeText(MainActivity.this, "Connected", Toast.LENGTH_SHORT).show();
}
@Override
public void onServiceDisconnected(ComponentName name) {
s = null;
}
}
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