When my activity is started it creates a service that acts as a server. The server receives raw data from my python script on my desktop. The Service creates and maintains DataManagers that handle all the data from my python script in a hash map keyed to the DM's name. At any given time I need an activity to bind to the service request some data from the service and process, when the activity pauses, stops or is destroyed it will unbind.
I believe I have the binding correct, but when I start the service the passed ServiceConnection is always returned null. Any idea's whats going on? my code was stolen directly from the RemoteService class from Android Thanks ~Aedon
{Code addendum}
The HomeScreen Activity that binds to the PublicService
@Override public void onCreate(Bundle icicle) {
super.onCreate(icicle);
doBindService();
setContentView(R.layout.homescreen);
initView();
}
public void initView() {
workbenchs = (Gallery)findViewById(R.id.workbenchs);
workbenchs.setMinimumHeight(h/4);
workbenchs.setAdapter(new WorkBenchAdapter(this));
workbenchs.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
Intent it = new Intent(HomeScreen.this, Controller.class);
it.putExtra("workbench", arg2);
startActivity(it);
}
});
}
// Gallery Adapter
public class WorkBenchAdapter extends BaseAdapter {
public WorkBenchAdapter(Context c) { }
public int getCount() {return mBoundService.getNumBenchs();}
public Object getItem(int position) {return position;}
public long getItemId(int position) {return position;}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView i = new ImageView(HomeScreen.this);
i.setImageBitmap(mBoundService.getWorkbench(position).toBitmap());
i.setLayoutParams(new Gallery.LayoutParams(w/4, h/4));
return i;
}
}
// Service Necessities
public boolean m开发者_如何转开发IsBound = false;
private PublicService mBoundService;
private ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
mBoundService = ((PublicService.LocalBinder)service).getService();
}
public void onServiceDisconnected(ComponentName className) {
mBoundService = null;
}
};
void doBindService() {
Log.d(TAG, "Binding...");
bindService(new Intent(this, PublicService.class), mConnection, Context.BIND_AUTO_CREATE);
mIsBound = true;
Log.d(TAG, "Bound.");
}
void doUnbindService() {
if (mIsBound) {
Log.d(TAG, "Unbinding...");
unbindService(mConnection);
mIsBound = false;
Log.d(TAG, "Unbound.");
}
}
My problem comes from the Workbench adapter. When the adapter is created it call get count (which starts as 0), but it keeps saying that the mBoundService is null. I have tried starting the service before binding and that changes nothing...
Did you specify the service tag in your manifest?
In <application>
you need to specify the service like this <service android:name="namespace.ServiceName"/>
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