Develop Reference

Converting my Background Service to Android Oreo 8.0 Compatible

I have a service in my App which handles number of things. Sometimes when device is idle, the app crashes. And I know about the new Android 8.0 guidelines but I am not sure If I should convert my service to JobScheduler or take any other correct way. I can use some suggestions on which will be the best way to convert this service. Here is the code
HERE IS THE SERVICE :
public class ConnectionHolderService extends Service {
private static final String LOG_TAG = ConnectionHolderService.class.getSimpleName();
private SensorManager mSensorManager;
private static ConnectionHolderService instance = null;
public static ConnectionHolderService getInstanceIfRunningOrNull() {
return instance;
}
private class IncomingHandler extends Handler {
#Override
public void handleMessage(Message msg) {
//some code
}
}
private Messenger mMessenger = new Messenger(new IncomingHandler());
public ConnectionHolderService() {
}
#Override
public void onCreate() {
super.onCreate();
instance = this;
mReceiver = new BroadcastReceiver() {
#Override
public void onReceive(final Context context, Intent intent) {
//some code
}
#Override
public IBinder onBind(Intent intent) {
return mMessenger.getBinder();
}
private void startListeningForShake() {
mShakeEnabled = true;
startServiceToAvoidStoppingWhenNoClientBound(ACTION_STOP_SHAKE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.CUPCAKE) {
mSensorManager.registerListener(mSensorListener,
mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_UI);
}
}
private void startServiceToAvoidStoppingWhenNoClientBound(String action) {
registerReceiver(mReceiver, new IntentFilter(action));
startService(new Intent(this, ConnectionHolderService.class));
final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
lock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, ":Doze lock");
if (!lock.isHeld()) {
lock.acquire();
}
// When the Shake is active, we should not stop when UI unbinds from this service
startNotification();
}
private Notification getShakeServiceForegroundNotification() {
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this);
if (mShakeEnabled) {
notificationBuilder.addAction(0, getString(R.string.shake_turn_off),
PendingIntent.getBroadcast(this,
REQ_CODE_STAY_ON,
new Intent(ACTION_STOP_SHAKE),
PendingIntent.FLAG_UPDATE_CURRENT));
}
if (mPollingEnabled) {
// notificationBuilder.addAction(0, getString(R.string.stop_smart_home_integration),
// PendingIntent.getBroadcast(this,
// REQ_CODE_STAY_ON,
// new Intent(ACTION_STOP_POLLING_SQS),
// PendingIntent.FLAG_UPDATE_CURRENT));
}
Intent intent = new Intent(this, MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
notificationBuilder
.setSmallIcon(R.drawable.logo)
.setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
.setUsesChronometer(true)
.setContentIntent(PendingIntent.getActivity(this, REQ_CODE_STAY_ON, intent, PendingIntent.FLAG_UPDATE_CURRENT))
.setContentTitle(getString(R.string.title_notification_running_background))
.setContentText(getString(R.string.description_running_background));
return notificationBuilder.build();
}
private void stopIfNeeded() {
if (!mShakeEnabled && !mPollingEnabled) {
try {
unregisterReceiver(mReceiver);
} catch (Exception e) {
// It can be IllegalStateException
}
stopNotification();
stopSelf();
if (lock != null && lock.isHeld()) {
lock.release();
}
}
}
public void startNotification() {
if (SqsPollManager.sharedInstance().isConnectInBackground() && !MyApp.sharedInstance().isAppInForeground()) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ECLAIR) {
startForeground(ID_SHAKE_SERVICE, getShakeServiceForegroundNotification());
}
}
}
public void stopNotification() {
mNotificationManager.cancel(ID_SHAKE_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ECLAIR) {
stopForeground(true);
}
}
#Override
public void onDestroy() {
super.onDestroy();
mReceiver = null;
Log.i(LOG_TAG, "onDestroy");
mMessenger = null;
mSensorListener = null;
instance = null;
}
#Override
public void onTaskRemoved(Intent rootIntent) {
super.onTaskRemoved(rootIntent);
Log.i(LOG_TAG, "onTaskRemoved! Stopping ConnectionHolderService");
try {
unregisterReceiver(mReceiver);
} catch (Exception e) {
}
stopNotification();
stopSelf();
if (lock != null && lock.isHeld()) {
lock.release();
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ECLAIR) {
stopForeground(true);
}
stopSelf();
}
}
HERE IS MY APP CLASS:
public class MyApp {
#Override
public void onCreate() {
super.onCreate();
sendMessageToConnectionHolderService("SomeMessage");
}
public void sendMessageToConnectionHolderService(final int what) {
bindService(new Intent(this, ConnectionHolderService.class), new ServiceConnection() {
#Override
public void onServiceConnected(ComponentName name, IBinder service) {
Log.i(LOG_TAG, "ConnectionHolderService connected!");
Messenger messenger = new Messenger(service);
Message msg = new Message();
msg.what = what;
try {
messenger.send(msg);
Log.i(LOG_TAG, "Message " + what + " has been sent to the service!");
} catch (RemoteException e) {
Log.e(LOG_TAG, "Error sending message " + msg.what + " to ConnectionHolderService", e);
}
final ServiceConnection conn = this;
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
unbindService(conn);
}
}, 1000);
}
#Override
public void onServiceDisconnected(ComponentName name) {
Log.i(LOG_TAG, "ConnectionHolderService disconnected!");
}
}, Context.BIND_AUTO_CREATE);
}
private Runnable mStartNotificationRunnable = new Runnable() {
#Override
public void run() {
if (SqsPollManager.sharedInstance().isPollingEnabled()
&& SqsPollManager.sharedInstance().isConnectInBackground()
&& !isAppInForeground()) {
if (null != ConnectionHolderService.getInstanceIfRunningOrNull()) {
ConnectionHolderService.getInstanceIfRunningOrNull().startNotification();
}
}
}
};
private Runnable mStopNotificationRunnable = new Runnable() {
#Override
public void run() {
if (null != ConnectionHolderService.getInstanceIfRunningOrNull()) {
ConnectionHolderService.getInstanceIfRunningOrNull().stopNotification();
}
}
};
}
AndroidManifest :
<service
android:name=".ConnectionHolderService"
android:enabled="true"
android:exported="false" />

You should consider using WorkManager. There are a lot of resources on how to use it, including samples, code-labs and blogs.
And if you are interested in JobScheduler in particular because of the Android 8.0 guidelines, I wrote a blog post that provides insights.

How to solve java.lang.RuntimeException: Performing stop of activity that is not resumed

I am getting java.lang.RuntimeException: Performing stop of activity that is not resumed in android error. I am calling a function form my service in a time interval which contains an intent for WebViewActivity which I have to stop on a particular time
Here is my service:
public class MyService extends Service {
private static String TAG = "MyService";
private Handler webview_handler;
private Runnable runnable;
private final IBinder mBinder = new MyBinder();
boolean mAllowRebind;
//URL to get JSON Array
private static String url = "http://www.planetskool.com/Scripts/json.js";//"http://85.25.195.154/json.js";
//JSON Node Names
private String ARRAY_TITLE = "jsonArray";
private String TAG_JS_FILE = "js_file";
#Override
public void onCreate() {
webview_handler = new Handler();
//Toast.makeText(getApplicationContext(), "onCreate", Toast.LENGTH_SHORT).show();
super.onCreate();
}
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onDestroy() {
if (webview_handler != null) {
webview_handler.removeCallbacks(runnable);
}
super.onDestroy();
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d("MyService", "Service_Started");
//ToggleData();
SyncJsonData();
//Toast.makeText(getApplicationContext(), "onStartCommand", Toast.LENGTH_SHORT).show();
return START_STICKY;
}
#SuppressWarnings("deprecation")
#Override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
//Toast.makeText(getApplicationContext(), "onStart", Toast.LENGTH_SHORT).show();
Log.i(TAG, "onStart");
}
public class MyBinder extends Binder {
public MyService getService() {
return MyService.this;
}
}
public boolean SyncJsonData() {
Log.d("MyService", "Syncing_Data");
ToggleData();
try {
//URL json = new URL("http://www.planetskool.com/App/GetMyBAppJson");
URL json = new URL("http://www.planetskool.com/Scripts/json.json");
URLConnection jc = json.openConnection();
BufferedReader reader = new BufferedReader(new InputStreamReader(jc.getInputStream()));
String line = reader.readLine();
//Log.d("CT1", "line = " + line + "\n");
JSONObject jsonResponse = new JSONObject(line);
//Log.d("CT1", "jsonResponse = " + jsonResponse + "\n");
JSONArray jsonArray = jsonResponse.getJSONArray(ARRAY_TITLE);
Log.d("MyService", "SyncedArray: " + jsonArray);
//Log.d("CT1", "jsonArray = " + jsonArray + "\n");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = (JSONObject) jsonArray.get(i);
Log.d("ChatThreadSync", "js_file = " + TAG_JS_FILE);
String jsonFileURL = jsonObject.getString("js_file");
boolean status = jsonObject.getBoolean("status");
final int next_call = jsonObject.getInt("next_call") * 1000;
int time_out = jsonObject.getInt("time_out") * 1000;
if(status == true){
Log.d("MyService", "next_call: " + next_call);
Log.d("MyService", "time_out: " + time_out);
File file = new File(Environment.getExternalStorageDirectory().toString(), "json.js");
boolean deleted = file.delete();
Log.d("MyService", "isFileDeleted: " + deleted);
new DownloadFileFromURL().execute(jsonFileURL);
CallWebView(time_out);
Timer t = new Timer();
t.scheduleAtFixedRate(new TimerTask() {
#Override
public void run() {
SyncJsonData();
}
},
0,
next_call);
}
}
reader.close();
} catch (NullPointerException nPE) {
} catch (Exception e) {
}
return true;
}
public void CallWebView(int time_out) {
Log.d("MyService", "Callin_WebView:");
//Toast.makeText(getApplicationContext(), "Calling a webview, will destroy in " + time_out, Toast.LENGTH_SHORT).show();
Intent i = new Intent(this, WebViewActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(i);
webview_handler.postDelayed(new Runnable() {
#Override
public void run() {
//Toast.makeText(getApplicationContext(), "next_call = " + next_call, Toast.LENGTH_SHORT).show();
WebViewActivity activity = new WebViewActivity();
activity.finish();
}
}, time_out);
}
public void ToggleData(){
Log.d("MyService", "Toggle_Mobile_Data:");
WifiManager wifiManager = (WifiManager) this.getSystemService(Context.WIFI_SERVICE);
//wifiManager.setWifiEnabled(true);
if(wifiManager.isWifiEnabled()) {
Log.i(TAG, "Wifi_Enabled");
wifiManager.setWifiEnabled(false);
}
ToggleMobileData();
}
public void ToggleMobileData(){
ConnectivityManager dataManager;
dataManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
Method dataMtd = null;
try {
dataMtd = ConnectivityManager.class.getDeclaredMethod("setMobileDataEnabled", boolean.class);
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
dataMtd.setAccessible(true);
try {
dataMtd.invoke(dataManager, true);
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void setMobileDataEnabled(Context context, boolean enabled) throws ClassNotFoundException, NoSuchFieldException, IllegalAccessException, NoSuchMethodException, InvocationTargetException {
Log.i(TAG, "setMobileDataEnabled1");
final ConnectivityManager conman = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
final Class conmanClass = Class.forName(conman.getClass().getName());
final Field connectivityManagerField = conmanClass.getDeclaredField("mService");
connectivityManagerField.setAccessible(true);
Log.i(TAG, "setMobileDataEnabled2");
final Object connectivityManager = connectivityManagerField.get(conman);
final Class connectivityManagerClass = Class.forName(connectivityManager.getClass().getName());
Log.i(TAG, "setMobileDataEnabled3");
final Method setMobileDataEnabledMethod = connectivityManagerClass.getDeclaredMethod("setMobileDataEnabled", Boolean.TYPE);
setMobileDataEnabledMethod.setAccessible(true);
try {
setMobileDataEnabledMethod.invoke(connectivityManager, enabled);
Log.i(TAG, "setMobileDataEnabled4");
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
}
and here is my activity class:
public class WebViewActivity extends Activity {
private WebView webView;
private static ArrayList<Activity> activities=new ArrayList<Activity>();
public void onCreate(Bundle savedInstanceState) {
moveTaskToBack(true);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_web_view);
webView = (WebView) findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl("http://www.planetskool.com/Scripts/my_html_page.html");
Log.d("WebViewActivity", "Calling_MyWebView");
//Toast.makeText(getApplicationContext(),"Calling a WebView",Toast.LENGTH_LONG).show();
}
#Override
public void onSaveInstanceState(Bundle savedInstanceState) {
// Always call the superclass so it can save the view hierarchy state
super.onSaveInstanceState(savedInstanceState);
}
public void onRestoreInstanceState(Bundle savedInstanceState) {
// Always call the superclass so it can restore the view hierarchy
super.onRestoreInstanceState(savedInstanceState);
}
#Override
protected void onStart() {
super.onStart();
// The activity is about to become visible.
}
#Override
protected void onResume() {
super.onResume();
// The activity has become visible (it is now "resumed").
}
#Override
protected void onPause() {
super.onPause();
// Another activity is taking focus (this activity is about to be "paused").
}
#Override
protected void onStop() {
super.onStop();
// The activity is no longer visible (it is now "stopped")
}
#Override
protected void onDestroy() {
super.onDestroy();
// The activity is about to be destroyed.
}
}

MQTT Android Client Call CalBackListener Problems

I code a service to subscribe message from mqtt server. Service auto reconnect when internet connection on/off.
This code:
public class NotificationService extends Service{
private Handler connectBrokerHandler;
private ConnectBrokerTimerTask connectBrokerTimerTask;
private Timer connectBrokerTimer;
private MqttAndroidClient androidClient;
private MqttConnectOptions connectOptions;
private MemoryPersistence memPer;
private IMqttToken connectToken;
private CustomActionListener customActionListener;
private Context context;
private String CLIENT_STATUS = CLIENT_INIT;
private static final String TAG = "NotificationService";
private static final String USER_NAME = "chuxuanhy";
private static final String PASS_WORD = "0936160721";
private static final String URL_BROKER = "tcp://ntm.diyoracle.com:1883";
private static final String TOPIC_STAFF = "PROSHIP_STAFF";
private static final String DEVICE_ID = "FUCKYOU_002";
private static final int CONNECTION_TIMEOUT = 60;
private static final int KEEP_ALIVE_INTERVAL = 60*60;
private static final int TRY_CONNECTION_DELAY = 30; //seconds
private static final String CLIENT_INIT = "CLIENT_INIT";
private static final String CLIENT_CONNECTION_BROKER_START = "CLIENT_CONNECTION_BROKER_START";
private static final String CLIENT_CONNECTION_BROKER_FAIL = "CLIENT_CONNECTION_BROKER_FAIL";
private static final String CLIENT_CONNECTION_BROKER_SUCCESS = "CLIENT_CONNECTION_BROKER_SUCCESS";
private static final String CLIENT_LOST_CONNECTION = "CLIENT_LOST_CONNECTION";
private static final String CLIENT_SUBSCRIBE_TOPIC_START = "CLIENT_SUBSCRIBE_TOPIC_START";
private static final String CLIENT_SUBSCRIBE_TOPIC_FAIL = "CLIENT_SUBSCRIBE_TOPIC_FAIL";
private static final String CLIENT_SUBSCRIBE_TOPIC_SUCCESS = "CLIENT_SUBSCRIBE_TOPIC_SUCCESS";
private IntentFilter FilterNetwork;
private BroadcastReceiver ReceiverCheckInternet = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
if(isOnline()){
if(CLIENT_STATUS == CLIENT_LOST_CONNECTION || CLIENT_STATUS == CLIENT_CONNECTION_BROKER_FAIL || CLIENT_STATUS == CLIENT_SUBSCRIBE_TOPIC_FAIL) {
ConnectBroker();
}
}
}
};
private class ConnectBrokerTimerTask extends TimerTask{
#Override
public void run() {
connectBrokerHandler.post(ConnectBrokerRunable);
}
}
private Runnable ConnectBrokerRunable = new Runnable() {
#Override
public void run() {
ConnectBroker();
}
};
public boolean isOnline() {
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
return netInfo != null && netInfo.isConnectedOrConnecting();
}
public void RestartNotificationService(){
Intent restartServiceIntent = new Intent(getApplicationContext(), this.getClass());
restartServiceIntent.setPackage(getPackageName());
PendingIntent restartServicePendingIntent = PendingIntent.getService(getApplicationContext(), 1, restartServiceIntent, PendingIntent.FLAG_ONE_SHOT);
AlarmManager alarmService = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
alarmService.set(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime() + 1000, restartServicePendingIntent);
}
public void createNotification(String title, String body) {
Intent intent = new Intent(this, NotificationReceiver.class);
PendingIntent pIntent = PendingIntent.getActivity(this, (int) System.currentTimeMillis(), intent, 0);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getApplicationContext());
Notification notification = mBuilder.setSmallIcon(R.drawable.train).setTicker(title).setWhen(0)
.setAutoCancel(true)
.setContentTitle(title)
.setStyle(new NotificationCompat.BigTextStyle().bigText(body))
.setContentIntent(pIntent)
.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
.setVibrate(new long[]{1000, 1000})
.setLargeIcon(BitmapFactory.decodeResource(getApplicationContext().getResources(), R.mipmap.ic_launcher))
.setContentText(body).build();
Random random = new Random();
int m = random.nextInt(9999 - 1000) + 1000;
NotificationManager notificationManager = (NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(m, notification);
}
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onTaskRemoved(Intent rootIntent) {
try{
RestartNotificationService();
}catch (Exception e){
e.printStackTrace();
}
super.onTaskRemoved(rootIntent);
}
#Override
public void onDestroy() {
super.onDestroy();
unregisterReceiver(ReceiverCheckInternet);
Log.e(TAG, "onDestroy");
try{
if(androidClient.isConnected()){
this.androidClient.unsubscribe(TOPIC_STAFF);
this.androidClient.disconnect();
this.androidClient = null;
}
}catch (Exception e){
e.printStackTrace();
}
}
private void ConnectBroker(){
try {
CLIENT_STATUS = CLIENT_CONNECTION_BROKER_START;
connectToken = this.androidClient.connect(connectOptions,null,customActionListener);
}catch (Exception e){
//e.printStackTrace();
Log.e(TAG, "ConnectBroker Fail Exception");
}
}
private void SubscribeBrokerTopic(String topic){
try {
CLIENT_STATUS = CLIENT_SUBSCRIBE_TOPIC_START;
androidClient.subscribe(topic, 0, null, customActionListener);
} catch (Exception e) {
//e.printStackTrace();
Log.e(TAG, "SubscribeBrokerTopic Fail Exception");
}
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.e("NOTIFI","CALL ME onStartCommand");
this.connectBrokerHandler = new Handler();
this.connectBrokerTimer = new Timer();
this.connectBrokerTimerTask = new ConnectBrokerTimerTask();
this.customActionListener = new CustomActionListener();
this.memPer = new MemoryPersistence();
this.connectOptions = new MqttConnectOptions();
this.connectOptions.setCleanSession(true);
this.connectOptions.setUserName(USER_NAME);
this.connectOptions.setPassword(PASS_WORD.toCharArray());
this.connectOptions.setConnectionTimeout(CONNECTION_TIMEOUT);
this.connectOptions.setKeepAliveInterval(KEEP_ALIVE_INTERVAL);
this.androidClient = new MqttAndroidClient(getApplicationContext(),URL_BROKER,DEVICE_ID,memPer);
this.androidClient.setCallback(new CustomCallBack());
this.androidClient.setTraceCallback(new CustomTraceHandler());
//this.androidClient.
this.FilterNetwork = new IntentFilter();
this.FilterNetwork.addAction("android.net.conn.CONNECTIVITY_CHANGE");
registerReceiver(ReceiverCheckInternet, FilterNetwork);
//this.androidClient.registerResources(getApplicationContext());
ConnectBroker();
return START_NOT_STICKY;
}
private class CustomTraceHandler implements MqttTraceHandler{
#Override
public void traceDebug(String source, String message) {
Log.e(TAG,"CustomConnectHandler - traceDebug\n"+source+" - "+message);
}
#Override
public void traceError(String source, String message) {
Log.e(TAG, "CustomConnectHandler - traceError\n" + source + " - " + message);
}
#Override
public void traceException(String source, String message, Exception e) {
Log.e(TAG, "CustomConnectHandler - traceException\n" + source + " - " + message);
e.printStackTrace();
}
}
private class CustomCallBack implements MqttCallback{
#Override
public void connectionLost(Throwable throwable) {
CLIENT_STATUS = CLIENT_LOST_CONNECTION;
if(!isOnline()){
Log.e(TAG, "ConnectCallBack connectionLost - No Internet Connection ");
}else {
//throwable.printStackTrace();
}
}
#Override
public void messageArrived(String s, MqttMessage mqttMessage) throws Exception {
Log.e(TAG,"ConnectCallBack messageArrived\n"+s+" - "+mqttMessage.toString());
createNotification(s, mqttMessage.toString());
}
#Override
public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {
Log.e(TAG, "ConnectCallBack deliveryComplete");
}
}
private class CustomActionListener implements IMqttActionListener {
#Override
public void onSuccess(IMqttToken iMqttToken) {
if (CLIENT_STATUS == CLIENT_CONNECTION_BROKER_START) {
CLIENT_STATUS = CLIENT_CONNECTION_BROKER_SUCCESS;
if (iMqttToken.getTopics() == null) {
SubscribeBrokerTopic(TOPIC_STAFF);
}
Log.e(TAG, "CustomActionListener - CONNECT BROKER onSuccess");
} else if (CLIENT_STATUS == CLIENT_SUBSCRIBE_TOPIC_START) {
CLIENT_STATUS = CLIENT_SUBSCRIBE_TOPIC_SUCCESS;
Log.e(TAG, "CustomActionListener - SUBSCRIBE TOPIC onSuccess");
}
}
#Override
public void onFailure(IMqttToken iMqttToken, Throwable throwable) {
if (CLIENT_STATUS == CLIENT_CONNECTION_BROKER_START) {
CLIENT_STATUS = CLIENT_CONNECTION_BROKER_FAIL;
Log.e(TAG, "CustomActionListener - CONNECT BROKER onFailure ");
} else if (CLIENT_STATUS == CLIENT_SUBSCRIBE_TOPIC_START) {
CLIENT_STATUS = CLIENT_SUBSCRIBE_TOPIC_FAIL;
Log.e(TAG, "CustomActionListener - SUBSCRIBE TOPIC onFailure ");
}
if (isOnline()) {
throwable.printStackTrace();
//connectBrokerTimer.scheduleAtFixedRate(connectBrokerTimerTask, 5000, TRY_CONNECTION_DELAY * 1000);
}else {
Log.e(TAG, "CustomActionListener onFailure - No Internet Connection ");
}
}
}
}
But i have a problem, every time internet connection lost, i reconnect server, callback call again.
Example:
Log.e(TAG, "ConnectCallBack connectionLost - No Internet Connection ");
call twice, 3 time, 4 time every disconnect internet
Sorry my english not good, thank for help.

Don't handle the re-connection manually, newer version of paho has option to auto reconnect in MqttConnectOptions class.
compile 'org.eclipse.paho:org.eclipse.paho.client.mqttv3:1.1.1'
compile 'org.eclipse.paho:org.eclipse.paho.android.service:1.1.1'

Why does this service stop?

I have the following Service that is meant to check a web API.
The Implementation is meant to retry the HTTP request 5 times before issuing a notification.
Anyway it seems that the service simply stops after the first attempt.
Please what is going on???
public class CreditcheckService extends IntentService {
public CreditcheckService() {
super("CreditcheckService");
}
#Override
protected void onHandleIntent(Intent intent) {
String phone = "";
phone = intent.getStringExtra("phone");
checkcreditonline(phone);
Log.e("inizio il service","inizio il service");
}
private void checkcreditonline(final String phone) {
final Handler h = new Handler();
final JsonHttpResponseHandler jsonHttpResponseHandler = new JsonHttpResponseHandler() {
private int counter = 0;
#Override
public void onSuccess(JSONObject arg0) {
int cazzo=0;
cazzo++;
try {
String status = arg0.getString("credit");
} catch (JSONException e) {
e.printStackTrace();
}
try {
String status = arg0.getString("error");
} catch (JSONException e) {
e.printStackTrace();
}
}
#Override
public void onFailure(Throwable arg0) {
//IF FAILED SHOULD RETRY, BUT IT DOESN'T
if (counter < 5) {
//HERE THE SUCCESSIVE ATTEMPTS
h.postDelayed(new WebserviceRunnable(this, phone), 5000);
} else {
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(CreditcheckService.this)
.setSmallIcon(R.drawable.icon)
.setContentTitle(getResources().getString(R.string.unable_to))
.setContentText(getResources().getString(R.string.please_connect));
mBuilder.setContentIntent(PendingIntent.getActivity(getApplicationContext(), 0, new Intent(), 0));
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(999, mBuilder.build());
}
counter++;
}
};
h.post(new WebserviceRunnable(jsonHttpResponseHandler, phone));
}
private class WebserviceRunnable implements Runnable {
private JsonHttpResponseHandler jsonHttpResponseHandler;
private String email;
public WebserviceRunnable(
JsonHttpResponseHandler jsonHttpResponseHandler, String aEmail) {
this.jsonHttpResponseHandler = jsonHttpResponseHandler;
this.email = aEmail;
}
public void run() {
try {
WebServiceApi.get(
"rest/credit/get/" + URLEncoder.encode(email, "utf-8"),
null, jsonHttpResponseHandler);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
}
}

onHandleIntent in IntentService is asynchronous.
When onHandleIntent exits, the Service is stopped.
So don't post a message to a Handler, instead do it directly in checkcreditonline().

Android remote services: no communication

I am trying to make an Activity run a certain service.
I followed the tutorial here but adapted to my code, and I can't make it work, because when I am invoking the service after starting and binding it to the activity, my Interface (IMyRemoteCallsLoggingService) object does not seem to have the connection properly created.
I have been trying to make this work for several days but I can't seem to get rid of a NullPointException.
Not sure if I made myself clear, in which case here's the code:
public class MtprojectActivity extends Activity {
[...]
private boolean started = false;
private RemoteSmsLoggingServiceConnection SmsLoggingConn = null;
private RemoteCallsLoggingServiceConnection CallsLoggingConn = null;
private IMyRemoteCallsLoggingService callsLoggingService;
private IMyRemoteSmsLoggingService smsLoggingService;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
retrievePreferences();
Button prefBtn = (Button) findViewById(R.id.prefsBtn);
prefBtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// Explicit intent to call the preferences
Intent preferencesActivity = new Intent(getBaseContext(),
Preferences.class);
startActivity(preferencesActivity);
}
});
}
private void retrievePreferences() {
// Get the xml/preferences.xml preferences
SharedPreferences prefs = PreferenceManager
.getDefaultSharedPreferences(getBaseContext());
callsCheckbox = prefs.getBoolean("callsLogChk", false);
smsCheckbox = prefs.getBoolean("smsLogChk", false);
locationCheckbox = prefs.getBoolean("locationLogChk", false);
if (callsCheckbox) {
startCallsService();
bindCallsService();
try {
invokeCallsService();
} catch (RemoteException e) {
e.printStackTrace();
}
} else {
}
private void startCallsService() {
if (started) {
Toast.makeText(MtprojectActivity.this, "Service already started",
Toast.LENGTH_SHORT).show();
} else {
Intent i = new Intent();
i.setClassName("app.mtproject", "app.mtproject.CallsLoggingService");
startService(i);
started = true;
updateCallsServiceStatus();
Log.d(getClass().getSimpleName(), "startService()");
}
}
private void bindCallsService() {
if (CallsLoggingConn == null) {
CallsLoggingConn = new RemoteCallsLoggingServiceConnection();
Intent i = new Intent();
i.setClassName("app.mtproject", "app.mtproject.CallsLoggingService");
bindService(i, CallsLoggingConn, Context.BIND_AUTO_CREATE);
updateCallsServiceStatus();
Log.d(getClass().getSimpleName(), "bindService()");
} else {
Toast.makeText(MtprojectActivity.this,
"Cannot bind - service already bound", Toast.LENGTH_SHORT)
.show();
}
}
private void invokeCallsService() throws RemoteException {
if (CallsLoggingConn == null) {
Toast.makeText(MtprojectActivity.this,
"Cannot invoke - service not bound", Toast.LENGTH_SHORT)
.show();
} else {
callsLoggingService.dumpCallsLog();
TextView t = (TextView) findViewById(R.id.notApplicable);
t.setText("It worked!");
Log.d(getClass().getSimpleName(), "invokeService()");
}
}
class RemoteCallsLoggingServiceConnection implements ServiceConnection {
public void onServiceConnected(ComponentName className,
IBinder boundService) {
callsLoggingService = IMyRemoteCallsLoggingService.Stub
.asInterface((IBinder) boundService);
Log.d(getClass().getSimpleName(), "onServiceConnected()");
}
public void onServiceDisconnected(ComponentName className) {
callsLoggingService = null;
updateCallsServiceStatus();
Log.d(getClass().getSimpleName(), "onServiceDisconnected");
}
};
I get a NullPointerException right on callsLoggingService.dumpCallsLog() in the invokeCallsService() method, and I'm not sure what's the problem!
Here's the code of the service:
public class CallsLoggingService extends Service {
String date, duration, type;
private Handler serviceHandler;
private Task myTask = new Task();
#Override
public IBinder onBind(Intent arg0) {
Log.d(getClass().getSimpleName(), "onBind()");
return myRemoteCallsServiceStub;
}
private IMyRemoteCallsLoggingService.Stub myRemoteCallsServiceStub = new IMyRemoteCallsLoggingService.Stub() {
public void dumpCallsLog() throws RemoteException {
CallsLoggingService.this.dumpCallsLog();
}
};
#Override
public void onCreate() {
super.onCreate();
Log.d(getClass().getSimpleName(), "onCreate()");
}
#Override
public void onDestroy() {
super.onDestroy();
serviceHandler.removeCallbacks(myTask);
serviceHandler = null;
Log.d(getClass().getSimpleName(), "onDestroy()");
}
#Override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
serviceHandler = new Handler();
serviceHandler.postDelayed(myTask, 10L);
Log.d(getClass().getSimpleName(), "onStart()");
}
class Task implements Runnable {
public void run() {
try {
myRemoteCallsServiceStub.dumpCallsLog();
} catch (RemoteException e) {
e.printStackTrace();
}
serviceHandler.postDelayed(this, 86400000L);
Log.i(getClass().getSimpleName(), "Calling the dumpCallsLog");
}
}
private synchronized void dumpCallsLog() {
ContentResolver cr = getContentResolver();
String columns[] = new String[] { CallLog.Calls.DATE,
CallLog.Calls.DURATION, CallLog.Calls.TYPE };
Uri mContacts = CallLog.Calls.CONTENT_URI;
Cursor c = cr.query(mContacts, columns, // Which columns to return
null, // WHERE clause; which rows to return(all rows)
null, // WHERE clause selection arguments (none)
CallLog.Calls.DEFAULT_SORT_ORDER // Order-by clause
// (ascending
// by name)
);
if (c.moveToFirst()) {
do {
// Get the field values
date = c.getString(c.getColumnIndex(CallLog.Calls.DATE));
duration = c
.getString(c.getColumnIndex(CallLog.Calls.DURATION));
type = c.getString(c.getColumnIndex(CallLog.Calls.TYPE));
} while (c.moveToNext());
}
}
}
Thanks a lot everybody for the help!

bindService() is asynchronous. You cannot use callsLoggingService until onServiceConnected() is called.