Android Question Auto Discovery [Android 6: ERROR]

[rtek1000]

I'm trying to run the "Autodiscover" example:
https://www.b4x.com/android/forum/threads/mqtt-chat-with-auto-discovery.75713/#content

Problem 1:
Android 6 can not find the server (Android 4.4 as server)

Problem 2:
If Android 6 is a server, Android 4.4 can find and connect to the server, but If Android 6 trying to go back (by pressing the Back key) causes this error (And the app quits and a warning pops up):

[Note: If Android 4.4 is the server, if server trying to go back (pressing the Back key) DOES NOT cause this error]

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
Connected: true
all/connect: asdf
** Activity (main) Pause, UserClosed = false **
** Activity (chat) Create, isFirst = true **
** Activity (chat) Resume **
Discovered server: 192.168.1.30
** Activity (chat) Pause, UserClosed = true **
all/disconnect: asdf
starter_client_messagearrived (java line: 262)
java.lang.NullPointerException: Attempt to invoke virtual method 'org.eclipse.paho.client.mqttv3.IMqttDeliveryToken org.eclipse.paho.client.mqttv3.MqttAsyncClient.publish(java.lang.String, byte[], int, boolean)' on a null object reference
at anywheresoftware.b4j.objects.MqttAsyncClientWrapper.Publish2(MqttAsyncClientWrapper.java:100)
at b4a.example.starter._client_messagearrived(starter.java:262)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
at anywheresoftware.b4a.BA$2.run(BA.java:360)
at android.os.Handler.handleCallback(Handler.java:746)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)

Problem 3:
Android 2.3.6 did not run, got error.
(I understand it is a very old version of Android, so I'm not too worried about it, I'm more concerned about Android 6)

This error occurs when you try to type something in the text box:

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
Discovered server: 192.168.1.32
java.lang.NoClassDefFoundError: android.animation.AnimatorSet
at com.wrapp.floatlabelededittext.FloatLabeledEditText.setShowHint(FloatLabeledEditText.java:161)
at com.wrapp.floatlabelededittext.FloatLabeledEditText.access$0(FloatLabeledEditText.java:153)
at com.wrapp.floatlabelededittext.FloatLabeledEditText$1.afterTextChanged(FloatLabeledEditText.java:116)
at android.widget.TextView.sendAfterTextChanged(TextView.java:6598)
at android.widget.TextView$ChangeWatcher.afterTextChanged(TextView.java:6787)
at android.text.SpannableStringBuilder.sendTextHasChanged(SpannableStringBuilder.java:897)
at android.text.SpannableStringBuilder.change(SpannableStringBuilder.java:353)
at android.text.SpannableStringBuilder.change(SpannableStringBuilder.java:269)
at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:432)
at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:409)
at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:28)
at android.view.inputmethod.BaseInputConnection.replaceText(BaseInputConnection.java:654)
at android.view.inputmethod.BaseInputConnection.commitText(BaseInputConnection.java:180)
at com.android.internal.widget.EditableInputConnection.commitText(EditableInputConnection.java:120)
at com.android.internal.view.IInputConnectionWrapper.executeMessage(IInputConnectionWrapper.java:283)
at com.android.internal.view.IInputConnectionWrapper$MyHandler.handleMessage(IInputConnectionWrapper.java:79)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
at dalvik.system.NativeStart.main(Native Method)

 

[rtek1000]

Ok, I managed to make it work on Android 2, I needed to change the text box, type FloatLabeledEditText, to the common type, EditText

The strange thing is that the same error occurred on Android 6:

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
Connected: true
all/connect: zxv
** Activity (main) Pause, UserClosed = false **
** Activity (chat) Create, isFirst = true **
** Activity (chat) Resume **
Discovered server: 192.168.1.36
** Activity (chat) Pause, UserClosed = true **
Discovered server: 192.168.1.36
all/disconnect: zxv
starter_client_messagearrived (java line: 262)
java.lang.NullPointerException
at anywheresoftware.b4j.objects.MqttAsyncClientWrapper.Publish2(MqttAsyncClientWrapper.java:100)
at b4a.example.starter._client_messagearrived(starter.java:262)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
at anywheresoftware.b4a.BA$2.run(BA.java:360)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
at dalvik.system.NativeStart.main(Native Method)

 

[Erel]

Run it in debug mode and see which line causes this error.

 

[rtek1000]

Android 6 - Debug mode: No erros!

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
Connected: true
all/connect: wert
** Activity (main) Pause, UserClosed = false **
** Activity (chat) Create, isFirst = true **
** Activity (chat) Resume **
Discovered server: 192.168.1.30
** Activity (chat) Pause, UserClosed = true **
** Activity (main) Resume **
Connected: true
all/connect: wert
** Activity (main) Pause, UserClosed = false **
** Activity (chat) Create, isFirst = false **
** Activity (chat) Resume **
Discovered server: 192.168.1.30
** Activity (chat) Pause, UserClosed = true **
** Activity (main) Resume **

Android 6 - Release mode: Error

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
Connected: true
all/connect: ety
** Activity (main) Pause, UserClosed = false **
** Activity (chat) Create, isFirst = true **
** Activity (chat) Resume **
Discovered server: 192.168.1.30
** Activity (chat) Pause, UserClosed = true **
all/disconnect: ety
starter_client_messagearrived (java line: 262)
java.lang.NullPointerException: Attempt to invoke virtual method 'org.eclipse.paho.client.mqttv3.IMqttDeliveryToken org.eclipse.paho.client.mqttv3.MqttAsyncClient.publish(java.lang.String, byte[], int, boolean)' on a null object reference
at anywheresoftware.b4j.objects.MqttAsyncClientWrapper.Publish2(MqttAsyncClientWrapper.java:100)
at b4a.example.starter._client_messagearrived(starter.java:262)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
at anywheresoftware.b4a.BA$2.run(BA.java:360)
at android.os.Handler.handleCallback(Handler.java:746)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)

Android 6 - Release (Obfuscated) mode: Error

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
Connected: true
all/connect: ert
** Activity (main) Pause, UserClosed = false **
** Activity (chat) Create, isFirst = true **
** Activity (chat) Resume **
Discovered server: 192.168.1.30
** Activity (chat) Pause, UserClosed = true **
all/disconnect: ert
starter_client_messagearrived (java line: 262)
java.lang.NullPointerException: Attempt to invoke virtual method 'org.eclipse.paho.client.mqttv3.IMqttDeliveryToken org.eclipse.paho.client.mqttv3.MqttAsyncClient.publish(java.lang.String, byte[], int, boolean)' on a null object reference
at anywheresoftware.b4j.objects.MqttAsyncClientWrapper.Publish2(MqttAsyncClientWrapper.java:100)
at b4a.example.starter._client_messagearrived(starter.java:262)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
at anywheresoftware.b4a.BA$2.run(BA.java:360)
at android.os.Handler.handleCallback(Handler.java:746)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)

Android 2 - Debug mode: [Error occurred on line: 104 (Starter)]
Line 104: "client.Publish2("all/users", serializator.ConvertObjectToBytes(users), 0, False)"

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
Connected: true
all/connect: qwr
** Activity (main) Pause, UserClosed = false **
** Activity (chat) Create, isFirst = true **
** Activity (chat) Resume **
** Activity (chat) Pause, UserClosed = true **
** Activity (main) Resume **
all/disconnect: qwr
Error occurred on line: 104 (Starter)
java.lang.NullPointerException
at anywheresoftware.b4j.objects.MqttAsyncClientWrapper.Publish2(MqttAsyncClientWrapper.java:100)
at b4a.example.starter._client_messagearrived(starter.java:455)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:710)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:342)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:249)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:139)
at anywheresoftware.b4a.BA$2.run(BA.java:360)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
at dalvik.system.NativeStart.main(Native Method)

Android 2 - Release mode:

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
Connected: true
all/connect: qwe
** Activity (main) Pause, UserClosed = false **
** Activity (chat) Create, isFirst = true **
** Activity (chat) Resume **
** Activity (chat) Pause, UserClosed = true **
all/disconnect: qwe
starter_client_messagearrived (java line: 262)
java.lang.NullPointerException
at anywheresoftware.b4j.objects.MqttAsyncClientWrapper.Publish2(MqttAsyncClientWrapper.java:100)
at b4a.example.starter._client_messagearrived(starter.java:262)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
at anywheresoftware.b4a.BA$2.run(BA.java:360)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
at dalvik.system.NativeStart.main(Native Method)

Android 2 - Release (Obfuscated) mode: Error

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
Connected: true
all/connect: qwe
** Activity (main) Pause, UserClosed = false **
** Activity (chat) Create, isFirst = true **
** Activity (chat) Resume **
** Activity (chat) Pause, UserClosed = true **
all/disconnect: qwe
starter_client_messagearrived (java line: 262)
java.lang.NullPointerException
at anywheresoftware.b4j.objects.MqttAsyncClientWrapper.Publish2(MqttAsyncClientWrapper.java:100)
at b4a.example.starter._client_messagearrived(starter.java:262)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
at anywheresoftware.b4a.BA$2.run(BA.java:360)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
at dalvik.system.NativeStart.main(Native Method)

I realized that b4a.exe (7) finds Android 4.4 if b4abridge is active.
I also noticed that b4a.exe (7) does not find Android 6 if b4abridge is active, but it connects to the android if I put the IP manually.
Is this related to the fact that Android 6 does not find the server on Android 4?

 

[Erel]

I also noticed that b4a.exe (7) does not find Android 6 if b4abridge is active

I don't think that it is related to the Android version. The discovery feature should work on all versions.

Can you post the code in Client_MessageArrived and mark line 104?

 

[rtek1000]

Excuse me, do you want me to publish the code made in b4a?

Service module Line 104:
"client.Publish2("all/users", serializator.ConvertObjectToBytes(users), 0, False)"

The code is the use example:

https://www.b4x.com/android/forum/attachments/mqttchatwithautodiscovery-zip.52448/

https://www.b4x.com/android/forum/threads/mqtt-chat-with-auto-discovery.75713/#content

 

[Erel]

It is difficult to follow this thread. Don't post more than a single error.

See the code in Activity_Pause of the Chat activity. It disconnects the connection (closes the client). Don't close it on the server side or modify the code as needed.