using mqtt for push notification in android with following libs :
implementation 'org.eclipse.paho:org.eclipse.paho.android.service:1.1.1'
implementation 'org.eclipse.paho:org.eclipse.paho.client.mqttv3:1.1.0'
i followed this tutorial , the problem is it works properly when app is open , but when it is swiped from recent apps , it stops working and I can't receive push notifications anymore any help is appreciated
solutions i tried :
first solution : created a service and simply created a mqttclient in it , but after swiping from recent apps didn't work anymore
public class MqttService extends Service {
public MqttService(Context context) {
super();
}
public MqttService() {
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
super.onStartCommand(intent, flags, startId);
PahoDemo paho = new Paho(getApplicationContext(), "myTopic");
return START_STICKY;
}
@Override
public void onTaskRemoved(Intent rootIntent) {
Intent intent = new Intent("com.example.restart");
sendBroadcast(intent);
}
@Override
public void onDestroy() {
super.onDestroy();
Intent intent = new Intent("com.example.restart");
sendBroadcast(intent);
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
}
PahoDemo :
public class Paho implements MqttCallback {
String topic;
MqttClient client;
Context context;
public Paho(Context context, String topic) {
this.context = context;
this.topic = topic;
try {
client = new MqttClient(StaticValue.getBROKER(), MqttClient.generateClientId(), persistence);
MqttConnectOptions connOpts = new MqttConnectOptions();
connOpts.setCleanSession(true);
client.connect(connOpts);
client.setCallback(this);
if (topic != null) {
client.subscribe(topic);
}
} catch (MqttException e) {
System.out.println("error: " + e);
e.printStackTrace();
}
}
@Override
public void connectionLost(Throwable cause) {
}
@Override
public void messageArrived(String topic, MqttMessage message) throws Exception {
Log.i("mqtt", "messageArrived ");
}
@Override
public void deliveryComplete(IMqttDeliveryToken token) {
Log.i("mqtt", token + "");
}
}
second solution:
added the below line to manifest :
<service android:name="org.eclipse.paho.android.service.MqttService" />
called this helper class from mainactivty's Oncreate :
public class MqttHelper {
public MqttAndroidClient mqttAndroidClient;
final String serverUri = "myBrokerUri";
final String clientId = MqttClient.generateClientId();
final String subscriptionTopic = "myTopic";
public MqttHelper(Context context){
mqttAndroidClient = new MqttAndroidClient(context, serverUri, clientId);
mqttAndroidClient.setCallback(new MqttCallbackExtended() {
@Override
public void connectComplete(boolean b, String s) {
Log.w("mqtt", s);
}
@Override
public void connectionLost(Throwable throwable) {
}
@Override
public void messageArrived(String topic, MqttMessage mqttMessage) throws Exception {
Log.w("Mqtt", mqttMessage.toString());
}
@Override
public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {
}
});
connect();
}
public void setCallback(MqttCallbackExtended callback) {
mqttAndroidClient.setCallback(callback);
}
private void connect(){
MqttConnectOptions mqttConnectOptions = new MqttConnectOptions();
mqttConnectOptions.setAutomaticReconnect(true);
mqttConnectOptions.setCleanSession(true);
try {
mqttAndroidClient.connect(mqttConnectOptions, null, new IMqttActionListener() {
@Override
public void onSuccess(IMqttToken asyncActionToken) {
subscribeToTopic();
}
@Override
public void onFailure(IMqttToken asyncActionToken, Throwable exception) {
Log.w("Mqtt", "Failed to connect to: " + serverUri + exception.toString());
}
});
} catch (MqttException ex){
ex.printStackTrace();
}
}
private void subscribeToTopic() {
try {
mqttAndroidClient.subscribe(subscriptionTopic, 0, null, new IMqttActionListener() {
@Override
public void onSuccess(IMqttToken asyncActionToken) {
Log.w("Mqtt","Subscribed!");
}
@Override
public void onFailure(IMqttToken asyncActionToken, Throwable exception) {
Log.w("Mqtt", "Subscribed fail!");
}
});
} catch (MqttException ex) {
System.err.println("Exceptionst subscribing");
ex.printStackTrace();
}
}
}
that's all i did since tow days ago . if someone has any ideas , please mention .
