Hi WoodManEXP,
It turned out in the end I just hadn't binded the service properly to the
activity
Like this:
Intent i = new Intent();
i.setClassName("team.org", "team.org.WIFIService");
bindService(i, this, Context.BIND_AUTO_CREATE);
On Sun, Jan 24, 2010 at 10:51 PM, WoodManEXP <[email protected]> wrote:
> Daffo0,
>
> I would like to know how you solve this because I have a similar need
> with a background service doing a job and the background service would
> like to push updates to an activity (if the activity is running).
>
> What are the preferred communication techniques between Service and
> Activities? You are using IRemoteInterface class. What about IBinder?
> Have you looked at that?
>
>
> On Jan 19, 12:44 pm, "[email protected]" <[email protected]> wrote:
> > I have aservicethat is running fine and I can see the data
> > collecting in the logcat,
> >
> > However after creating an aidl and trying to get the information from
> > theserviceto my main activity I have hit a problem.
> >
> > I just cant seem to get the data to pass across at all, I always get a
> > null pointer exception.
> >
> > Here is myserviceclass, I want to get the connectedLevel int to use
> > in my activity class.
> >
> > Is it because I'm not binding properly or what am I missing but any
> > calls to the remote interface to try and get the data ends up with a
> > null pointer exception.
> >
> > My activity class code is posted underneath.
> >
> > --------------------
> >
> > Serviceclass
> >
> > public class WIFIService extendsService{
> >
> > private static final int WIFI_NOTIFY = 0x2001;
> > public static final String EXTRA_UPDATE_RATE = "update-rate";
> > public static final String WIFI_SERVICE =
> > "cicero.org.WIFIService.SERVICE";
> >
> > private WifiManager mainWifi;
> > private BroadcastReceiver rssiListener = null;
> >
> > private int updateRate = -1;
> > private int connectedLevel;
> >
> > @Override
> > public void onCreate(){
> > super.onCreate();
> > mainWifi = (WifiManager)
> getSystemService(Context.WIFI_SERVICE);
> > notifier = (NotificationManager) getSystemService
> > (Context.NOTIFICATION_SERVICE);
> >
> > }
> >
> > @Override
> > public void onStart(Intent intent, int startId){
> > super.onStart(intent, startId);
> >
> > updateRate = intent.getIntExtra(EXTRA_UPDATE_RATE, -1);
> > if(updateRate == -1){
> >
> > updateRate = 60000;
> >
> > }
> > rssiListener = new BroadcastReceiver(){
> >
> > @Override
> > public void onReceive(Context context, Intent intent) {
> > String action = intent.getAction();
> >
> > if(WifiManager.RSSI_CHANGED_ACTION.equals(action))
> > {
> > WifiInfo data = mainWifi.getConnectionInfo();
> > Log.d("WIFISERVICE", "RSSI has changed");
> > if(mainWifi.getConnectionInfo()!=null){
> > setConnectedLevel(data.getRssi());
> > Log.d("WIFISERVICE", "new RSSI = " +
> > data.getSSID()+ " " + data.getRssi() + "dBm");
> > }
> > }
> > }
> > };
> >
> > }
> >
> > @Override
> > public void onDestroy(){
> >
> > if(rssiListener != null){
> > unregisterReceiver(rssiListener);
> > rssiListener = null;
> > }
> >
> > if(wifiChangeListener != null){
> > unregisterReceiver(wifiChangeListener);
> > wifiChangeListener = null;
> > }
> >
> > if(receiverWifi != null){
> > unregisterReceiver(receiverWifi);
> > receiverWifi = null;
> > }
> > super.onDestroy();
> >
> > }
> > public void setConnectedLevel(int connectedLevel) {
> > this.connectedLevel = connectedLevel;
> >
> > }
> >
> > @Override
> > public IBinder onBind(Intent intent) {
> > // we only have one, so no need to check the intent
> > return mRemoteInterfaceBinder;
> > }
> >
> > // remote interface
> > private final IRemoteInterface.Stub mRemoteInterfaceBinder =
> new
> > IRemoteInterface.Stub() {
> >
> > @Override
> > public int getConnectedLevel() throws
> RemoteException {
> > Log.v("interface", "getConnectedLevel()
> called");
> > return connectedLevel;
> > }
> >
> > };
> >
> > }
> >
> > --------------------
> >
> > Activity class
> >
> > public class TestApp extends Activity implements ServiceConnection{
> >
> > IRemoteInterface mRemoteInterface = null;
> > int connectedLevel;
> >
> > /** Called when the activity is first created. */
> > @Override
> > public void onCreate(Bundle savedInstanceState) {
> > super.onCreate(savedInstanceState);
> > setContentView(R.layout.main);
> >
> > CallMonitor cm = new CallMonitor(this);
> > wifi = new WiFi(this);
> >
> > final Button settings_Button = (Button) findViewById
> > (R.id.settingsButton);
> >
> > settings_Button.setOnClickListener(new
> View.OnClickListener()
> > {
> > public void onClick(View v){
> > final Intent myIntent = new
> Intent(TestApp.this,
> > SettingsApp.class);
> > startActivity(myIntent);
> >
> > //Toast.makeText(GetCallLog.this, nameE,
> Toast.LENGTH_LONG).show
> > ();
> > }
> >
> > });
> >
> > final Button scan_Button = (Button) findViewById
> > (R.id.scanButton);
> >
> > scan_Button.setOnClickListener(new
> View.OnClickListener(){
> > public void onClick(View v){
> >
> > Intentservice= new
> Intent(WIFIService.WIFI_SERVICE);
> > service.putExtra(WIFIService.EXTRA_UPDATE_RATE, 5000);
> > startService(service);
> > getConnectedData();
> >
> > });
> >
> > final Button stop_Scan_Button = (Button) findViewById
> > (R.id.stopScanButton);
> >
> > stop_Scan_Button.setOnClickListener(new
> View.OnClickListener
> > (){
> > public void onClick(View v){
> >
> > Intentservice= new
> Intent(WIFIService.WIFI_SERVICE);
> > stopService(service);
> >
> > }
> >
> > });
> >
> > }
> >
> > public void getConnectedData() {
> >
> > try {
> >
> > int connectedLevel = mRemoteInterface.getConnectedLevel();
> >
> > Log.d("GOT IT!", "connectedLevel = " + connectedLevel);
> >
> > } catch (RemoteException e) {
> > Log.e("ServiceControl", "Call to remote interface
> > failed.", e);
> > }
> > }
> >
> > @Override
> > protected void onResume() {
> > super.onResume();
> > // get a link to our remoteservice
> > bindService(new Intent(IRemoteInterface.class.getName()),
> > this, Context.BIND_AUTO_CREATE);
> > }
> >
> > @Override
> > protected void onPause() {
> > // remove the link to the remoteservice
> > unbindService(this);
> > super.onPause();
> > }
> >
> > public void onServiceConnected(ComponentName className,
> IBinderservice) {
> >
> > mRemoteInterface =
> IRemoteInterface.Stub.asInterface(service);
> > Log.d( "SERVICE" ,"onServiceConnected" );
> > }
> > @Override
> > public void onServiceDisconnected(ComponentName arg0) {
> >
> > mRemoteInterface = null;
> >
> > }
> >
> > }
> >
> > Can anybody spot a mistake or where I'm missing something?
>
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