Android Question [Things] B4A Class - BeaconParser

Hypnos · Jul 17, 2017

Hi All,

I want to use a raspberry pi 3 to monitor my beacons instead of an android phone so I use this B4A Class on Android Things Platform but got the following error:

B4X:

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
starter_scan (java line: 208)
java.lang.RuntimeException: Error starting scan.
    at anywheresoftware.b4a.objects.BleManager2.Scan2(BleManager2.java:142)
    at b4a.example.starter._scan(starter.java:208)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
    at anywheresoftware.b4a.keywords.Common.CallSub4(Common.java:1044)
    at anywheresoftware.b4a.keywords.Common.CallSubNew(Common.java:978)
    at b4a.example.main._btnscan_click(main.java:373)
    at b4a.example.main._activity_create(main.java:343)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
    at b4a.example.main.afterFirstLayout(main.java:102)
    at b4a.example.main.access$000(main.java:17)
    at b4a.example.main$WaitForLayout.run(main.java:80)
    at android.os.Handler.handleCallback(Handler.java:751)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6077)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

Anyone have idea? is that because Android things not yet support BLE yet? Thanks!

Erel · Jul 18, 2017

Check the unfiltered logs. There might be more information.

Are you using the latest version (4.1) ?
https://developer.android.com/things/preview/download.html

Hypnos · Jul 18, 2017

Erel said:
Check the unfiltered logs. There might be more information.

Are you using the latest version (4.1) ?
https://developer.android.com/things/preview/download.html

Yes, I'm using the latest version. here is the unfiltered log (full log can be found on the attachment)

B4X:

*** Service (starter) Create ***
Message: 20
Added callback: android.bluetooth.IBluetoothManagerCallback$Stub$Proxy@6a752ca:true
** Service (starter) Start **
Skipped 64 frames!  The application may be doing too much work on its main thread.
Long monitor contention with owner android.display (432) at void com.android.server.wm.WindowAnimator$1.doFrame(long)(WindowAnimator.java:138) waiters=0 in int com.android.server.wm.WindowManagerService.relayoutWindow(com.android.server.wm.Session, android.view.IWindow, int, android.view.WindowManager$LayoutParams, int, int, int, int, android.graphics.Rect, android.graphics.Rect, android.graphics.Rect, android.graphics.Rect, android.graphics.Rect, android.graphics.Rect, android.graphics.Rect, android.content.res.Configuration, android.view.Surface) for 360ms
ignoring event: statechanged
** Activity (main) Create, isFirst = true **
startLeScan(): null
startLeScan: cannot get BluetoothLeScanner
starter_scan (java line: 208)
java.lang.RuntimeException: Error starting scan.
    at anywheresoftware.b4a.objects.BleManager2.Scan2(BleManager2.java:142)
    at b4a.example.starter._scan(starter.java:208)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
    at anywheresoftware.b4a.keywords.Common.CallSub4(Common.java:1044)
    at anywheresoftware.b4a.keywords.Common.CallSubNew(Common.java:978)
    at b4a.example.main._btnscan_click(main.java:373)
    at b4a.example.main._activity_create(main.java:343)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
    at b4a.example.main.afterFirstLayout(main.java:102)
    at b4a.example.main.access$000(main.java:17)
    at b4a.example.main$WaitForLayout.run(main.java:80)
    at android.os.Handler.handleCallback(Handler.java:751)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6077)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
--------- beginning of crash
FATAL EXCEPTION: main
Process: b4a.example, PID: 1349
java.lang.RuntimeException: Error starting scan.
    at anywheresoftware.b4a.objects.BleManager2.Scan2(BleManager2.java:142)
    at b4a.example.starter._scan(starter.java:208)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
    at anywheresoftware.b4a.keywords.Common.CallSub4(Common.java:1044)
    at anywheresoftware.b4a.keywords.Common.CallSubNew(Common.java:978)
    at b4a.example.main._btnscan_click(main.java:373)
    at b4a.example.main._activity_create(main.java:343)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
    at b4a.example.main.afterFirstLayout(main.java:102)
    at b4a.example.main.access$000(main.java:17)
    at b4a.example.main$WaitForLayout.run(main.java:80)
    at android.os.Handler.handleCallback(Handler.java:751)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6077)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
  Force finishing activity b4a.example/.main
Sending signal. PID: 1349 SIG: 9
Error writing /proc/1349/oom_score_adj; errno=22
channel '86e586c b4a.example/b4a.example.main (server)' ~ Consumer closed input channel or an error occurred.  events=0x9
channel '86e586c b4a.example/b4a.example.main (server)' ~ Channel is unrecoverably broken and will be disposed!
WIN DEATH: Window{86e586c u0 b4a.example/b4a.example.main}
Attempted to unregister already unregistered input channel '86e586c b4a.example/b4a.example.main (server)'
Destroying surface Surface(name=b4a.example/b4a.example.main) called by com.android.server.wm.WindowStateAnimator.destroySurface:2014 com.android.server.wm.WindowStateAnimator.destroySurfaceLocked:881 com.android.server.wm.WindowState.removeLocked:1449 com.android.server.wm.WindowManagerService.removeWindowInnerLocked:2478 com.android.server.wm.WindowManagerService.removeWindowLocked:2436 com.android.server.wm.WindowState$DeathRecipient.binderDied:1780 android.os.BinderProxy.sendDeathNotice:688 <bottom of call stack>
Process b4a.example (pid 1349) has died
cleanUpApplicationRecord -- 1349
Scheduling restart of crashed service b4a.example/.starter in 1000ms
Destroying surface Surface(name=Starting b4a.example) called by com.android.server.wm.WindowStateAnimator.destroySurface:2014 com.android.server.wm.WindowStateAnimator.destroySurfaceLocked:881 com.android.server.wm.WindowState.removeLocked:1449 com.android.server.wm.WindowManagerService.removeWindowInnerLocked:2478 com.android.server.wm.WindowManagerService.removeWindowLocked:2436 com.android.server.wm.WindowManagerService.removeWindowLocked:2305 com.android.server.wm.WindowManagerService.removeWindow:2300 com.android.server.wm.Session.remove:193
Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@2f7b7b3 attribute=null, token = android.os.BinderProxy@c229d6b
Compilation of void v.a(i, int, int, int, boolean) took 164.440ms
dex2oat took 2.273s (threads: 4) arena alloc=2MB (3141728B) java alloc=563KB (577176B) native alloc=1934KB (1980960B) free=4MB (4834784B)
Unknown instruction set features for ARM CPU variant (generic) using conservative defaults
/system/bin/dex2oat --dex-file=/data/user_de/0/com.google.android.gms/app_chimera/m/00000000/GoogleCertificates_GmsCore_things_alldpi_release.apk --oat-fd=37 --oat-location=/data/user_de/0/com.google.android.gms/app_chimera/m/00000000/oat/arm/GoogleCertificates_GmsCore_things_alldpi_release.dex --compiler-filter=speed
Error opening trace file: No such file or directory (2)
dex2oat took 579.136ms (threads: 4) arena alloc=635KB (651072B) java alloc=541KB (554136B) native alloc=1381KB (1414416B) free=3MB (3304176B)
File error accessing recents directory (directory doesn't exist?).
ClassLoader referenced unknown path: /system/priv-app/PrebuiltGmsCoreThings/lib/arm
ClassLoader referenced unknown path: /system/priv-app/PrebuiltGmsCoreThings/lib/arm

Erel · Jul 19, 2017

https://stackoverflow.com/questions/31536191/startlescan-cannot-get-bluetoothlescanner

Maybe Bluetooth is off? You can enable it with BluetoothAdmin.

Hypnos · Jul 22, 2017

Erel said:
https://stackoverflow.com/questions/31536191/startlescan-cannot-get-bluetoothlescanner

Maybe Bluetooth is off? You can enable it with BluetoothAdmin.

It's worked after enable Bluetooth with BuletoothAdmin, but I got another problem, I want my pi keep monitor the beacons but the program will stop scanning (no item found in CLV) after around 30-40mins, I have to press the stop scanning button / Scan button again. Do you know what is the problem ?

Erel · Jul 23, 2017

Please start a new thread for this question.

Android Question [Things] B4A Class - BeaconParser

Hypnos

Active Member

Erel

B4X founder

Hypnos

Active Member

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Erel

B4X founder

Hypnos

Active Member

Erel

B4X founder