Android Question My thread was shut down while getting USB temporary permissions.

[MomoWen]

Sub thread2_start
    Dim args(0) As Object
    If TestRunningTime.Running Then       
        TestRunningTime.Interrupt               
    End If

    If TestRunningTime.IsInitialized Then
        TestRunningTimeLock.Initialize(True)
        TestRunningTime.Name = "B4A Thread 2"
        TestRunningTime.Start(Null,"thread2Start", args)
    End If
End Sub
Sub thread2Start
    Dim args(0) As Object
         Do While SubDown
        Log("thread2Start")
        TestRunningTime.Sleep(2000)
    Loop
'    TestRunningTime.RunOnGuiThread("Update2",args)
End Sub

Sub SelectedDevice
    
    For i=0 To UsbManager.GetDevices.Length-1
        Dim dev As UsbDevice=UsbManager.GetDevices(i)
        If dev.VendorId=6790 And dev.ProductId=29987 Then
        If UsbManager.HasPermission(dev) = False Then
                Debug.DebugLog(Debug.LogTypes.System,"HasPermission")
                UsbManager.RequestPermission(dev)
        End If
            If Uusbdev.IsInitialized And Uusbdev.DeviceName.CompareTo(dev.DeviceName)=0 Then
                PreserveUSBDeviceLock.Unlock
                Return
            End If
            Log("authorization!")
            Uusbdev=dev
            IsusbReset=True
            If IsRecord Then
                xml.tabe1.UpdateCell(UsbSetRow.Col,UsbSetRow.Row,Uusbdev.DeviceName.SubString(Uusbdev.DeviceName.LastIndexOf("/")+1))
            End If
            PreserveUSBDeviceLock.Unlock
            Log("PreserveUSBDeviceLock.Unlock")
            Return
        End If
    Next
    Uusbdev=Null
    PreserveUSBDeviceLock.Unlock
End Sub

 

[MomoWen]

Note: Getting the USB device function is done in a thread through a call to RunOnGuiThread ().However, any thread that Thread.sleep () will exit with an exception when the USB permission pop-up box appears ( English is not my first language. )

 

[MomoWen]

Data obtained from write buffer: *IDN?

Raw data from write buffer: 0x2A 0x49 0x44 0x4E 0x3F 0x0D 0x0A
Number of bytes obtained from write buffer: 7
[5]·[20:16:42]·[33938]·[System]·[HasPermission]
authorization!
PreserveUSBDeviceLock.Unlock
** Activity (main) Pause, UserClosed = false **
thread2Start
sending message to waiting queue (testrunningtime_ended)
sending message to waiting queue (sleep)
sending message to waiting queue (testrunning_ended)
running waiting messages (3)
java.lang.reflect.InvocationTargetException
Exception : null----------TestRunningTime_Ended=false
java.lang.reflect.InvocationTargetException
Exception : null----------TestRunning_Ended=false
** Activity (main) Resume **
-1 received
writer error
java.lang.InterruptedException
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.reportInterruptAfterWait(AbstractQueuedSynchronizer.java:1992)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2026)
    at java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:373)
    at anywheresoftware.b4a.remotelogger.Connector$Writer.run(Connector.java:160)
    at java.lang.Thread.run(Thread.java:841)
Starting remote logger. Port: 35352
After accept
Uusbdev.IsInitialized
Not(isTesting)
Getusb=
Buffer size: 16384

 

[Erel]

Why do you need this strange code?

No need to use the Threading library with USB.

 

[MomoWen]

This is my test of the problem
EN~I have solved the problem .
But I was curious, when I clicked on the USB permissions TAB, the screen turned black and quickly recovered.
Threads that call the thread.sleep() function will also close because of an exception

 

[MomoWen]

This is my test of the problem
EN~I have solved the problem .
But I was curious, when I clicked on the USB permissions TAB, the screen turned black and quickly recovered.
Threads that call the thread.sleep() function will also close because of an exception

It seems to be related to an Android activity, ondestruction-onCreate
Activities were destroyed and rebuilt.(This is my guess, English is not my native language.)