We Keep Coding

Why my app shows open ads after closing it

I successfully implemented the code from the google developers guide's, but i got two issues on my app, first, when i show the dialog to the user to be sure to close the app, and he closes it, the ad shows, second how can i set up the ad for don't close after my app load completly
this is the guide:
https://developers.google.com/admob/android/app-open-ads
and this is my code:
MyApplication.java
public class MyApplication extends Application {
private static AppOpenManager appOpenManager;
#Override
public void onCreate() {
super.onCreate();
MobileAds.initialize(
this,
new OnInitializationCompleteListener() {
#Override
public void onInitializationComplete(InitializationStatus initializationStatus) {
}
});
appOpenManager = new AppOpenManager(this);
}
OpenAppOpenManager.java
public class AppOpenManager implements LifecycleObserver, Application.ActivityLifecycleCallbacks {
private static final String LOG_TAG = "AppOpenManager";
private static final String AD_UNIT_ID = "ca-app-pub-3940256099942544/3419835294";
private static boolean isShowingAd = false;
private final MyApplication myApplication;
private AppOpenAd appOpenAd = null;
private AppOpenAd.AppOpenAdLoadCallback loadCallback;
private Activity currentActivity;
private long loadTime = 0;
/**
* Constructor
*/
public AppOpenManager(MyApplication myApplication) {
this.myApplication = myApplication;
this.myApplication.registerActivityLifecycleCallbacks(this);
ProcessLifecycleOwner.get().getLifecycle().addObserver(this);
}
/**
* Shows the ad if one isn't already showing.
*/
public void showAdIfAvailable() {
// Only show ad if there is not already an app open ad currently showing
// and an ad is available.
if (!isShowingAd && isAdAvailable()) {
Log.d(LOG_TAG, "Will show ad.");
FullScreenContentCallback fullScreenContentCallback =
new FullScreenContentCallback() {
#Override
public void onAdDismissedFullScreenContent() {
// Set the reference to null so isAdAvailable() returns false.
AppOpenManager.this.appOpenAd = null;
isShowingAd = false;
fetchAd();
}
#Override
public void onAdFailedToShowFullScreenContent(AdError adError) {
}
#Override
public void onAdShowedFullScreenContent() {
isShowingAd = true;
}
};
appOpenAd.setFullScreenContentCallback(fullScreenContentCallback);
appOpenAd.show(currentActivity);
} else {
Log.d(LOG_TAG, "Can not show ad.");
fetchAd();
}
}
/**
* LifecycleObserver methods
*/
#OnLifecycleEvent(ON_START)
public void onStart() {
showAdIfAvailable();
Log.d(LOG_TAG, "onStart");
}
/**
* Request an ad
*/
public void fetchAd() {
// Have unused ad, no need to fetch another.
if (isAdAvailable()) {
return;
}
loadCallback =
new AppOpenAd.AppOpenAdLoadCallback() {
#Override
public void onAdLoaded(#NonNull AppOpenAd appOpenAd) {
super.onAdLoaded(appOpenAd);
AppOpenManager.this.appOpenAd = appOpenAd;
AppOpenManager.this.loadTime = (new Date()).getTime();
}
#Override
public void onAdFailedToLoad(#NonNull LoadAdError loadAdError) {
super.onAdFailedToLoad(loadAdError);
Log.d(LOG_TAG, "failed to load");
}
};
AdRequest request = getAdRequest();
AppOpenAd.load(
myApplication, AD_UNIT_ID, request,
AppOpenAd.APP_OPEN_AD_ORIENTATION_PORTRAIT, loadCallback);
}
/**
* Creates and returns ad request.
*/
private AdRequest getAdRequest() {
return new AdRequest.Builder().build();
}
/**
* Utility method to check if ad was loaded more than n hours ago.
*/
private boolean wasLoadTimeLessThanNHoursAgo(long numHours) {
long dateDifference = (new Date()).getTime() - this.loadTime;
long numMilliSecondsPerHour = 3600000;
return (dateDifference < (numMilliSecondsPerHour * numHours));
}
/**
* Utility method that checks if ad exists and can be shown.
*/
public boolean isAdAvailable() {
return appOpenAd != null && wasLoadTimeLessThanNHoursAgo(4);
}
#Override
public void onActivityCreated(#NonNull Activity activity, #Nullable Bundle savedInstanceState) {
}
#Override
public void onActivityStarted(Activity activity) {
currentActivity = activity;
}
#Override
public void onActivityResumed(Activity activity) {
currentActivity = activity;
}
#Override
public void onActivityPaused(#NonNull Activity activity) {
}
#Override
public void onActivityStopped(#NonNull Activity activity) {
}
#Override
public void onActivitySaveInstanceState(#NonNull Activity activity, #NonNull Bundle outState) {
}
#Override
public void onActivityDestroyed(Activity activity) {
currentActivity = null;
}

Show a progress Bar when Rewarded video Ads is loading

I want to use Rewarded video ads (Admob) but I want to show a progress bar while the video ads is loading
I already try to did it with async task just to see if the video will load but it didn't work
#SuppressLint("StaticFieldLeak")
public class videoAd extends AsyncTask<Void, Void, Void> {
#Override
protected void doInBackground(Void... voids) {
runOnUiThread(new Runnable() {
#Override
public void run() {
mRewardedVideoAd.loadAd("ca-app-pub-3940256099942544/5224354917", new AdRequest.Builder().build());
}
});
}
#Override
protected void onPostExecute(Integer integer) {
super.onPostExecute(integer);
if (mRewardedVideoAd.isLoaded()){
Toast.makeText(SetFullWallpaper.this, "Video loaded", Toast.LENGTH_SHORT).show();
mRewardedVideoAd.show();
}
}
}
Now I want to load a progress bar if the video is not loaded yet
Thank you

This is how I did it:
I had a button, which when clicked showed the ad, so I had a boolean variable which tracked whether the button has been clicked:
boolean buttonClicked = false
These lines were in my onCreate function:
mRewardedVideoAd = MobileAds.getRewardedVideoAdInstance(getContext());
rewardedVideoAdListener = new RewardedVideoAdListener() {
#Override
public void onRewardedVideoAdLoaded() {
if(buttonClicked) {
showAd();
}
}
#Override
public void onRewardedVideoAdOpened() {
}
#Override
public void onRewardedVideoStarted() {
}
#Override
public void onRewardedVideoAdClosed() {
loadRewardedVideoAd();
}
#Override
public void onRewarded(RewardItem rewardItem) {
}
#Override
public void onRewardedVideoAdLeftApplication() {
}
#Override
public void onRewardedVideoAdFailedToLoad(int i) {
if(buttonClicked) {
progressBar.setVisibility(View.INVISIBLE);
Toast toast = Toast.makeText(getContext(), "Please try again later", Toast.LENGTH_SHORT);
toast.show();
}
}
#Override
public void onRewardedVideoCompleted() {
}
};
mRewardedVideoAd.setRewardedVideoAdListener(rewardedVideoAdListener);
loadRewardedVideoAd();
pointsButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
showAd();
}
});
This was my showAd function:
public void showAd(){
if (mRewardedVideoAd.isLoaded()) {
progressBar.setVisibility(View.GONE);
mRewardedVideoAd.show();
buttonClicked = false;
} else {
loadRewardedVideoAd();
progressBar.setVisibility(View.VISIBLE);
buttonClicked = true;
}
}
How this works is, the app tries to load the ad in the background by calling the loadRewaredVideoAd() function when the activity/fragment is created. Then when the user clicks the button,showAd() function is called and one of two things happen:
1) If the ad was successfully loaded, it shows the ad.
2) If not, it calls loadRewardedVideoAd() again and shows a progressbar this time. It also sets buttonClicked to true. Then if the ad loads, the onRewardedVideoAdLoaded() function is called which calls showAd() again and this time the 1st option happens.
If the ad didn't load this time as well, then onRewardedVideoAdFailedToLoad(int i)is called and it shows a toast saying the user to try again later.

add OnProgressUpdate() in your class that extends AsyncTask and add progress dialog in this.

I am placing an admob video, which is executed when you enter the activity. In my case, I put an executable loop to start the video when it is already loaded.
if (mRewardedVideoAd.isLoaded()) {
mRewardedVideoAd.show();
}else{
loadRewardedVideoAd();
}
This is part of all my code
private boolean started = false;
private Handler handler = new Handler();
private void initializeAdMob() {
mRewardedVideoAd = MobileAds.getRewardedVideoAdInstance(this);
mRewardedVideoAd.setRewardedVideoAdListener(this);
loadRewardedVideoAd();
}
private void loadRewardedVideoAd() {
if (!mRewardedVideoAd.isLoaded()) {
mRewardedVideoAd.loadAd(getString(R.string.id_block_activity), new AdRequest.Builder().build());
}
}
private void showRewardedVideoAd() {
if (BaseInteractor.isNetworkAvailable(this)) {
showProgressBar(true);
start();
}
}
private Runnable runnable = new Runnable() {
#Override
public void run() {
if (mRewardedVideoAd.isLoaded()) {
mRewardedVideoAd.show();
}else{
loadRewardedVideoAd();
}
if (started) {
start();
}
}
};
public void stop() {
started = false;
handler.removeCallbacks(runnable);
}
public void start() {
started = true;
handler.postDelayed(runnable, 2000);
}
finally I stop the runnable in
#Override
public void onRewardedVideoAdOpened() {
showProgressBar(false);
stop();
}
I hope this helps you.

Implementation of onDestroy to close a Billing Client

I am trying to make example of Play Billing application described here
In Last step they have described
To clean all the resources and unregister the observer, you just need to call BillingClient.endConnection. So define a method with this call inside BillingManager and then call it from GamePlayActivity.onDestroy:
according to above information I have made function called destroy like this in BillingManagerjava class.
public void destroy() {
mBillingClient.endConnection();
}
My Full BillingManager Class is like below
public class BillingManager implements PurchasesUpdatedListener {
private final BillingClient mBillingClient;
private final Activity mActivity;
private static final String TAG = "BillingManager";
public BillingManager(Activity activity) {
mActivity = activity;
mBillingClient = BillingClient.newBuilder(mActivity).setListener(this).build();
mBillingClient.startConnection(new BillingClientStateListener() {
#Override
public void onBillingSetupFinished(#BillingClient.BillingResponse int billingResponse) {
if (billingResponse == BillingClient.BillingResponse.OK) {
Log.i(TAG, "onBillingSetupFinished() response: " + billingResponse);
} else {
Log.w(TAG, "onBillingSetupFinished() error code: " + billingResponse);
}
}
#Override
public void onBillingServiceDisconnected() {
Log.w(TAG, "onBillingServiceDisconnected()");
}
});
}
public void startPurchaseFlow(final String skuId, final String billingType) {
// Specify a runnable to start when connection to Billing client is established
Runnable executeOnConnectedService = new Runnable() {
#Override
public void run() {
BillingFlowParams billingFlowParams = BillingFlowParams.newBuilder()
.setType(billingType)
.setSku(skuId)
.build();
mBillingClient.launchBillingFlow(mActivity, billingFlowParams);
}
};
// If Billing client was disconnected, we retry 1 time
// and if success, execute the query
startServiceConnectionIfNeeded(executeOnConnectedService);
}
#Override
public void onPurchasesUpdated(#BillingClient.BillingResponse int responseCode,
List<Purchase> purchases) {
Log.d(TAG, "onPurchasesUpdated() response: " + responseCode);
}
private static final HashMap<String, List<String>> SKUS;
static
{
SKUS = new HashMap<>();
SKUS.put(BillingClient.SkuType.INAPP, Arrays.asList("gas", "premium"));
SKUS.put(BillingClient.SkuType.SUBS, Arrays.asList("gold_monthly", "gold_yearly"));
}
public List<String> getSkus(#BillingClient.SkuType String type) {
return SKUS.get(type);
}
public void querySkuDetailsAsync(#BillingClient.SkuType final String itemType,
final List<String> skuList, final SkuDetailsResponseListener listener) {
// Specify a runnable to start when connection to Billing client is established
Runnable executeOnConnectedService = new Runnable() {
#Override
public void run() {
SkuDetailsParams skuDetailsParams = SkuDetailsParams.newBuilder()
.setSkusList(skuList).setType(itemType).build();
mBillingClient.querySkuDetailsAsync(skuDetailsParams,
new SkuDetailsResponseListener() {
#Override
public void onSkuDetailsResponse(int responseCode,
List<SkuDetails> skuDetailsList) {
listener.onSkuDetailsResponse(responseCode, skuDetailsList);
}
});
}
};
// If Billing client was disconnected, we retry 1 time
// and if success, execute the query
startServiceConnectionIfNeeded(executeOnConnectedService);
}
private void startServiceConnectionIfNeeded(final Runnable executeOnSuccess) {
if (mBillingClient.isReady()) {
if (executeOnSuccess != null) {
executeOnSuccess.run();
}
} else {
mBillingClient.startConnection(new BillingClientStateListener() {
#Override
public void onBillingSetupFinished(#BillingClient.BillingResponse int billingResponse) {
if (billingResponse == BillingClient.BillingResponse.OK) {
Log.i(TAG, "onBillingSetupFinished() response: " + billingResponse);
if (executeOnSuccess != null) {
executeOnSuccess.run();
}
} else {
Log.w(TAG, "onBillingSetupFinished() error code: " + billingResponse);
}
}
#Override
public void onBillingServiceDisconnected() {
Log.w(TAG, "onBillingServiceDisconnected()");
}
});
}
}
public void destroy() {
mBillingClient.endConnection();
}
}
And My GamePlayActivity is like below
public class GamePlayActivity extends FragmentActivity implements BillingProvider {
#Override
protected void onDestroy() {
super.onDestroy();
// I want call method here
}
}
Now I want call above function in my game play activity. I have no idea how to call it.

As it mentioned in documentation
call it from GamePlayActivity.onDestroy
but you defined your own method.
Override onDestroy method of GamePlayActivity and put mBillingClient.endConnection(); into it.
#Override
protected void onDestroy() {
mBillingClient.endConnection();
}

I assume your Activity already has an instance of the BillingManager
public class GamePlayActivity extends FragmentActivity implements BillingProvider {
BillingManager bm; // assign this in onCreate
#Override
protected void onDestroy() {
super.onDestroy();
bm.destroy();
}
}

How do I disconnect from a device when I close my app?

I am working on a project in Android Studio where I am supposed to connect two devices using Wifi-Direct.
I have managed to connect to another device with Wifi-direct. My problem is that when I close the app manually on my phone, the devices do not disconnect. How can I achieve this? I am quite new with Android Studio and java.
Here is my WifiDirectActivity class:
public class WiFiDirectActivity extends Activity implements WifiP2pManager.ChannelListener, DeviceListFragment.DeviceActionListener {
public static final String TAG = "wifidirectdemo";
private WifiP2pManager manager;
private boolean isWifiP2pEnabled = false;
private boolean retryChannel = false;
private final IntentFilter intentFilter = new IntentFilter();
private WifiP2pManager.Channel channel;
private BroadcastReceiver receiver = null;
/**
* #param isWifiP2pEnabled the isWifiP2pEnabled to set
*/
public void setIsWifiP2pEnabled(boolean isWifiP2pEnabled) {
this.isWifiP2pEnabled = isWifiP2pEnabled;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_peers);
// add necessary intent values to be matched.
intentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
intentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
intentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
intentFilter.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION);
manager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
channel = manager.initialize(this, getMainLooper(), null);
}
/** register the BroadcastReceiver with the intent values to be matched */
#Override
public void onResume() {
super.onResume();
receiver = new WiFiDirectBroadcastReceiver(manager, channel, this);
registerReceiver(receiver, intentFilter);
if (!amConnected) {
performSearch();
}
}
#Override
public void onPause() {
super.onPause();
unregisterReceiver(receiver);
}
/**
* Remove all peers and clear all fields. This is called on
* BroadcastReceiver receiving a state change event.
*/
public void resetData() {
DeviceListFragment fragmentList = (DeviceListFragment) getFragmentManager()
.findFragmentById(R.id.frag_list);
DeviceDetailFragment fragmentDetails = (DeviceDetailFragment) getFragmentManager()
.findFragmentById(R.id.frag_detail);
if (fragmentList != null) {
fragmentList.clearPeers();
}
if (fragmentDetails != null) {
fragmentDetails.resetViews();
}
}
#Override
public void showDetails(WifiP2pDevice device) {
DeviceDetailFragment fragment = (DeviceDetailFragment) getFragmentManager()
.findFragmentById(R.id.frag_detail);
fragment.showDetails(device);
}
#Override
public void connect(WifiP2pConfig config) {
manager.connect(channel, config, new WifiP2pManager.ActionListener() {
#Override
public void onSuccess() {
// WiFiDirectBroadcastReceiver will notify us. Ignore for now.
}
#Override
public void onFailure(int reason) {
Toast.makeText(WiFiDirectActivity.this, "Connect failed. Retry.",
Toast.LENGTH_SHORT).show();
}
});
}
#Override
public void disconnect() {
final DeviceDetailFragment fragment = (DeviceDetailFragment) getFragmentManager()
.findFragmentById(R.id.frag_detail);
fragment.resetViews();
manager.removeGroup(channel, new WifiP2pManager.ActionListener() {
#Override
public void onFailure(int reasonCode) {
Log.d(TAG, "Disconnect failed. Reason :" + reasonCode);
}
#Override
public void onSuccess() {
fragment.getView().setVisibility(View.GONE);
}
});
}
#Override
public void onChannelDisconnected() {
// we will try once more
if (manager != null && !retryChannel) {
Toast.makeText(this, "Channel lost. Trying again", Toast.LENGTH_LONG).show();
resetData();
retryChannel = true;
manager.initialize(this, getMainLooper(), this);
} else {
Toast.makeText(this,
"Severe! Channel is probably lost premanently. Try Disable/Re-Enable P2P.",
Toast.LENGTH_LONG).show();
}
}
#Override
public void cancelDisconnect() {
/*
* A cancel abort request by user. Disconnect i.e. removeGroup if
* already connected. Else, request WifiP2pManager to abort the ongoing
* request
*/
if (manager != null) {
final DeviceListFragment fragment = (DeviceListFragment) getFragmentManager()
.findFragmentById(R.id.frag_list);
if (fragment.getDevice() == null
|| fragment.getDevice().status == WifiP2pDevice.CONNECTED) {
disconnect();
} else if (fragment.getDevice().status == WifiP2pDevice.AVAILABLE
|| fragment.getDevice().status == WifiP2pDevice.INVITED) {
manager.cancelConnect(channel, new WifiP2pManager.ActionListener() {
#Override
public void onSuccess() {
Toast.makeText(WiFiDirectActivity.this, "Aborting connection",
Toast.LENGTH_SHORT).show();
}
#Override
public void onFailure(int reasonCode) {
Toast.makeText(WiFiDirectActivity.this,
"Connect abort request failed. Reason Code: " + reasonCode,
Toast.LENGTH_SHORT).show();
}
});
}
}
}
private void performSearch() {
final DeviceListFragment fragment = (DeviceListFragment) getFragmentManager()
.findFragmentById(R.id.frag_list);
fragment.onInitiateDiscovery();
manager.discoverPeers(channel, new WifiP2pManager.ActionListener() {
#Override
public void onSuccess() {
Toast.makeText(WiFiDirectActivity.this, "Discovery Initiated",
Toast.LENGTH_SHORT).show();
}
#Override
public void onFailure(int reasonCode) {
Toast.makeText(WiFiDirectActivity.this, "Discovery Failed : " + reasonCode,
Toast.LENGTH_SHORT).show();
}
});
}
}

When you close the app the execution will run through onPause() callback, there you should call the disconnect() method. However, take 5 minutes of your time to understand Android's life cycle principle: https://developer.android.com/guide/components/activities/activity-lifecycle.html. It's one of the first things to learn before developing an Android app.

How to make a background service?

I need to execute some tasks when my application is closed.
I have made a service for do this and tried many things, but i don't have the good result.
If someone have a tutorial or some path to follow, it would be great
This is my service:
public class TrackersImporter extends Service {
private static TrackersImporter instance;
private static long refreshDelay = 1; // Minutes
private Looper mServiceLooper;
private ServiceHandler mServiceHandler;
private boolean isInit = false;
public ArrayList<Tracker> trackers = new ArrayList<>();
public static TrackersImporter getInstance(){
if (instance == null)
instance = new TrackersImporter();
return instance;
}
#Override
public void onCreate() {
HandlerThread thread = new HandlerThread("TrackersImporter",
Process.THREAD_PRIORITY_BACKGROUND);
thread.start();
mServiceLooper = thread.getLooper();
mServiceHandler = new ServiceHandler(mServiceLooper);
}
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
try {
Toast.makeText(this, "onStartCommand", Toast.LENGTH_SHORT).show();
Message message = mServiceHandler.obtainMessage();
message.arg1 = startId;
mServiceHandler.sendMessage(message);
} catch (Exception e) {
Log.w("TrackersImporter", e.getMessage());
}
return START_STICKY;
}
public void addTracker(Tracker tracker) {
trackers.add(tracker);
}
protected void showToast(final String msg){
Handler handler = new Handler(Looper.getMainLooper());
handler.post(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_SHORT).show();
}
});
}
// Object responsible for
private final class ServiceHandler extends Handler {
public ServiceHandler(Looper looper) {
super(looper);
}
#Override
public void handleMessage(Message msg) {
addTracker(Runkeeper.getInstance(MainActivity.getActivity()));
addTracker(Strava.getInstance(MainActivity.getActivity()));
startImport(MainActivity.getActivity().getBaseContext(), MainActivity.getActivity().getAppUser(), trackers);
stopSelf(msg.arg1);
}
/**
* Perform data imports.
* Imports are performed only 1 time.
* Additional calls to this method are equivalent to no-op.
* Call init() then performImport() for each TrackerImportable
* #param user user receiving the datas
*/
public void startImport(Context context, User user, ArrayList<Tracker> trackers) {
Context ctx = MainActivity.getActivity().getApplicationContext();
LocalDateTime now = new LocalDateTime();
if (Preferences.getPref(ctx, "tracker_import_date") == "")
Preferences.setPref(ctx, "tracker_import_date", now.toString());
LocalDateTime past = LocalDateTime.parse(Preferences.getPref(ctx, "tracker_import_date"));
long duration = new Duration(past.toDateTime(), now.toDateTime()).getStandardMinutes();
if (isInit)
return;
if (duration > refreshDelay) {
Preferences.setPref(ctx, "tracker_import_date", now.toString());
for (Tracker tracker : trackers) {
if (tracker.isEnabled() && Tracker.isUserEnabled(context, tracker.getName())) {
tracker.init();
tracker.performImport(user);
}
}
}
isInit = true;
}
}
}
This is my mainActivity
public class MainActivity extends BaseActivity {
...
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
...
if (ConnectivityUtil.isConnected(this.getApplicationContext())) {
initGoogleFit();
initTrackers(appUser);
}
}
private void initTrackers(User user) {
Intent trackersIntentService = new Intent(this, TrackersImporter.class);
trackersIntentService.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
this.startService(trackersIntentService);
}
#Override
protected void onResume() {
...
if (ConnectivityUtil.isConnected(this.getApplicationContext())) {
initTrackers(appUser);
}
}
}

First Create one launcher Activity which is like your Main Activity.
In Activity "onCreate" Method you need to start Service and Do Some thing if you wont in Service "onStartCommand" Method.
public class MainActivity extends Activity {
ArrayList<Integer> list;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
startService(new Intent(MainActivity.this,TrackersImporter.class);
}
public class TrackersImporter extends Service {
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
// do something
Log.v(TAG ,"Service is started");
}
}
And also Register this Service at manifest.xml like this.
<service android:name=".TrackersImporter"></service>
if you like stop service
stopService(new Intent(MainActivity.this,TrackersImporter.class);