CODEWITHSUNDEEP
androidservicemqttpaho
Amrmsmb
Amrmsmb

Reputation: 11416

App crashes when BackButton is pressed

i am using Paho Android Service API and I onnect in onResume and disconnect in onPause. At run time, I can subscribe from the device and see the published messages from the PC through mosquitto Broker. when I press he BackButton the App crahses and shows the below logcat errors.

kindly please let me know how to solve this issue.

to Note:

1_since i am using Paho Android Service API i imported the required libraries into the project. And
within the application element of the manifest file of my project i have added this line

2_i am not registering any receivers in my frament, the receiver in included in the library i imported to use Paho API

<!-- Mqtt Service -->
    <service android:name="org.eclipse.paho.android.service.MqttService" >
    </service>

LogCat:

     Activity com.example.mqtt_test_00.MessaginActivity   
    has leaked IntentReceiver org.eclipse.paho.android.service.MqttAndroidClient@43075698 that was   
    originally registered here. Are you missing a call to unregisterReceiver()?
 android.app.IntentReceiverLeaked: Activity   
    com.example.mqtt_test_00.MessaginActivity has leaked IntentReceiver  
    org.eclipse.paho.android.service.MqttAndroidClient@43075698 that was originally registered here.  
    Are you missing a call to unregisterReceiver()?
    at android.app.LoadedApk$ReceiverDispatcher.
    <init>(LoadedApk.java:814)
    at 
    android.app.LoadedApk.getReceiverDispatcher(LoadedApk.java:610)
    at 
    android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:1762)
    at  
    android.app.ContextImpl.registerReceiver(ContextImpl.java:1742)
    at  
    android.app.ContextImpl.registerReceiver(ContextImpl.java:1736)
    at 
    android.content.ContextWrapper.registerReceiver(ContextWrapper.java:478)
    at org
    .eclipse.paho.android.service.MqttAndroidClient.registerReceiver(MqttAndroidClient.java:410)

    at  
    org.eclipse.paho.android.service.MqttAndroidClient.connect(MqttAndroidClient.java:388)
    at   
    com.example.mqtt_test_00.Sub_Frag$5.onClick(Sub_Frag.java:98)
 android.app.ServiceConnectionLeaked: Activity 
    com.example.mqtt_test_00.MessaginActivity has leaked ServiceConnection 
    org.eclipse.paho.android.service.MqttAndroidClient$MyServiceConnection@430756f0 that was 
    originally bound here
    at android.app.LoadedApk$ServiceDispatcher.<init>
    (LoadedApk.java:988)
    at 
    org.eclipse.paho.android.service.MqttAndroidClient.connect(MqttAndroidClient.java:385)
    at   
    com.example.mqtt_test_00.Sub_Frag$5.onClick(Sub_Frag.java:98 )

Upvotes: 2

Views: 1635

Answers (4)

Henry
Henry

Reputation: 21

MqttAndroidClient has method named unregisterResources which will unregister receiver if any.

The usage is something likes this

MqttConnection connection = MqttConnections.getInstance(this).getConnection(clientHandle); connection.getClient().unregisterResources();

Upvotes: 0

Amrmsmb
Amrmsmb

Reputation: 11416

I would not repeat what aother members have suggested and recommnded, but the only thing I would like to say is that, calling client.disconnect would unregister the service. Have you called disconnect?

Upvotes: 0

prakash
prakash

Reputation: 1413

Your issue is:

11-21 13:26:51.703: E/ActivityThread(28310): android.app.IntentReceiverLeaked: Activity   
com.example.mqtt_test_00.MessaginActivity has leaked IntentReceiver  
org.eclipse.paho.android.service.MqttAndroidClient@43075698 that was originally      registered here.  
Are you missing a call to unregisterReceiver()?

your not unregister service in same class ,so your got this issue,try like this,

@Override
public void onPause() {
    super.onPause();
    try
    {
       unregisterReceiver(this.intentReceiver);
    }
    catch(Exception e)
    {
        e.printStackTrace();
    }
}

Upvotes: 0

Mike
Mike

Reputation: 4570

The logcat is pretty clear about the situation. It seems like you're not unregistering a receiver.

You should do that by calling unregisterReceiver() in one of the life-cycle methods(onPause(), onStop()) your Activity has.

unregisterReceiver(yourReceiver);

Where yourReceiver is most probably an instance of MqttAndroidClient(per logcat output)

Upvotes: 1

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