Example Multipleports

[MaDoeb]

I tested the example multipleports with one USB device (CDC) wich has two serial ports. It works great. But when I disconnect the USB device the system crahes with the following exception:

--------- beginning of crash 01-16 10:58:02.004 2972-2972/? E/AndroidRuntime: FATAL EXCEPTION: main Process: com.felhr.examplemultipleports, PID: 2972 java.lang.RuntimeException: Error receiving broadcast Intent { act=android.hardware.usb.action.USB_DEVICE_DETACHED flg=0x10 (has extras) } in com.felhr.examplemultipleports.UsbService$1@19a0290 at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:891) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) Caused by: java.lang.IllegalStateException: Stream contains more than one element at com.annimon.stream.Stream.findSingle(Stream.java:2005) at com.felhr.usbserial.SerialPortBuilder.disconnectDevice(SerialPortBuilder.java:135) at com.felhr.examplemultipleports.UsbService$1.onReceive(UsbService.java:85) at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:881) at android.os.Handler.handleCallback(Handler.java:739)  at android.os.Handler.dispatchMessage(Handler.java:95)  at android.os.Looper.loop(Looper.java:148)  at android.app.ActivityThread.main(ActivityThread.java:5417)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

Source code in SerialPortBuilder.java where the exception occurs:

public boolean disconnectDevice(UsbDevice usbDevice){ Optional<UsbSerialDevice> optionalDevice = Stream.of(serialDevices) .filter(p -> usbDevice.getDeviceId() == p.getDeviceId()) .findSingle();

The function .findSingle(); seems to produce the error.

Has anyone an idee how to solve this?

Best regards Marc

[felHR85]

@MaDoeb Could you send me more information about the device you are connecting? You can get it with lsusb -l in Linux/OSX or using my free app DroidTerm using the USB serial viewer option

[felHR85]

@MaDoeb Could you try with multiple_ports_fix branch?

[MaDoeb]

@felHR85 Thanks for your help. I tested the fix. There is no exception anymore when I disconnect USB, but when I reconnect USB the device doesn't work. I get lots of messages (10 per ms) in my logcat window: com.felhr.examplemultipleports E/UsbDeviceConnectionJNI: device is closed in native_control_request

When I test your example serialport its works. I can disconnect and reconnect USB-device and it is still working. But with this example I can use only one of the serial ports. Perhaps you also find a solution for multiport example. Thanks a lot Marc

[felHR85]

@MaDoeb What device are you connecting? I dont have any Usb device with two serial ports Also, Does both ports work the first time before disconnecting them?

[MaDoeb]

@felHR85 The device is a digital radio from Motorola. Beforde disconnection, both ports ar working.