android - Samsung Galaxy Tab S 10.5 および Unity での Android UsbHost の問題

Question

アプリケーションが既に開いていて、USBDevice が接続されている場合、アプリケーションはデバイスと通信できる場合とできない場合があります。私が受け取るエラーは毎回異なります。定数は、Samsung Galaxy 電話、Nexus 7、Nexus 10 で期待どおりに動作することです。接続されているデバイスからアプリケーションを起動すると、ほとんどの場合、すべてが期待どおりに動作します。

マニフェストは次のように設定されます

<uses-feature android:name="android.hardware.usb.host" />
<uses-feature android:name="android.hardware.usb.UsbInterface" />

<activity android:label="@string/app_name"
    android:screenOrientation="fullSensor"  android:launchMode="singleTask"
    android:configChanges="mcc|mnc|locale|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|fontScale"
    android:name="com.realart.Beatmaker.UnityPlayerNativeActivity">

    <intent-filter >
        <action android:name="android.intent.action.MAIN" />              
        <category android:name="android.intent.category.LAUNCHER" />    
    </intent-filter>

    <intent-filter >
        <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
    </intent-filter>

    <!-- USB Connect List -->
    <meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"
        android:resource="@xml/device_filter" />

    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />
    </intent-filter>

    <meta-data android:name="unityplayer.UnityActivity" android:value="true" />
    <meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="false" />    

</activity> 

onCreate では、次の方法で、アプリケーションがインテントから起動されたかどうかを確認します。

// Get the device that woke up the activity
UsbDevice connectedDevice = (UsbDevice)getIntent()
        .getParcelableExtra(UsbManager.EXTRA_DEVICE);

if (connectedDevice != null) {
    UsbManager manager = (UsbManager)getSystemService(Context.USB_SERVICE);
    UsbDevice device = connectedDevice;
    writeDeviceInfo(device);
    initDataTransferThread(manager, device);

}

アプリケーションが既に開かれている場合は、そのためlaunchMode、メソッドを次のようにsingleTaskオーバーライドしましたonNewIntent

@Override
public void onNewIntent(Intent intent) {
    final String DEVICE_CONNECTED = "android.hardware.usb.action.USB_DEVICE_ATTACHED";

    String action = intent.getAction();
    if (action.equals(DEVICE_CONNECTED)) {
        Log.d(TAG, "Device connected");
        final UsbManager manager = (UsbManager)getSystemService(Context.USB_SERVICE);

        try {
            final UsbDevice connectedDevice = (UsbDevice)intent
                    .getParcelableExtra(UsbManager.EXTRA_DEVICE);

            if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
                if (connectedDevice != null) {
                    writeDeviceInfo(connectedDevice);
                    initDataTransferThread(manager, connectedDevice);
                } else {
                    Log.d(TAG, "Device null");
                }
            } else {
                Log.d(TAG, "Permission denied");
                Log.d(TAG, "Asking for permission and trying again...");
                manager.requestPermission(connectedDevice, permissionIntent);
            }
        } catch (Exception e) {
            Log.d(TAG, "Exception throw: " + e.toString());
            e.printStackTrace();
        }
    }
}

そして、ほとんどの場合、そのメソッドで許可が拒否されたelseブロックにヒットするため、次のように設定した許可チェックブロードキャストレシーバーに移動します。

// Attach Events
attachReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.d(TAG, "Permissions receiver hit");
        String action = intent.getAction();
        Log.d(TAG, "Action requested: " + action);
        UsbManager manager = (UsbManager)getSystemService(Context.USB_SERVICE);
        if (intent.getAction().equals("com.realart.Beatmaker.USB_PERMISSION")) {

            // Thread still running?
            if (arduino != null) {
                if (arduino.pipeline != null) {
                    Message msg = Message.obtain();
                    msg.what = Change.USB_DISCONNECTED;
                    arduino.pipeline.sendMessage(msg);
                }
                arduino = null;
            }

            synchronized (this) {
                Log.d(TAG, "Checking permissions from user...");
                UsbDevice device = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
                boolean permissionGranted = intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false);
                Log.d(TAG, "Permissions granted: " + permissionGranted);
                if (permissionGranted) {
                    if (device != null) {
                        writeDeviceInfo(device);
                        initDataTransferThread(manager, device);
                    } else {
                        Log.d(TAG, "Device null");
                    }
                } else {
                    Log.d(TAG, "Permission denied from user");
                }
            }
        }
    }
};

permissionIntent = PendingIntent.getBroadcast(this, 0, new Intent("com.realart.Beatmaker.USB_PERMISSION"), 0);
IntentFilter attachFilter = new IntentFilter("com.realart.Beatmaker.USB_PERMISSION");
registerReceiver(attachReceiver, attachFilter);

そのプロセスはエラーを引き起こしているようには見えず、デバイス情報は毎回書き出されます。ときどき、2 つのインターフェイスがリストされることもあれば、0 のこともあります。

これは私がデバイスを初期化する方法です:

private boolean initSerialBus() {
    try {
        // Open device
        connection = usbManager.openDevice(arduino);
        if (connection == null) {
            Log.d(TAG, "Opening device failed");
            return false;
        }

        // Get serial interface
        usbInterface = arduino.getInterface(1);
        boolean interfaceClaimed = connection.claimInterface(usbInterface, FORCE_CLAIM);
        Log.d(TAG, "USB Interface claimed: " + interfaceClaimed);
        if (!interfaceClaimed) {
            Log.d(TAG, "Trying again with kernel driver");
            interfaceClaimed = connection.claimInterface(usbInterface, false);
            if (!interfaceClaimed) {
                Log.d(TAG, "Unable to claim interface.");
                return false;
            }
        }

        // Arduino USB serial converter setup
        Log.d(TAG, "Data Transfter setup");

        // Line state
        int lineState = connection.controlTransfer(0x21, 0x22, 0, 0, null, 0, 0);
        if (lineState < 0) {
            Log.d(TAG, "Line state control transfer failed.");
            Log.d(TAG, "Return value: " + lineState);
            releaseUsbResources();
            arduinoState.onArduinoError(new Exception("Control frame transfer error"));
            return false;
        }
        Log.d(TAG, "Line state control frame: OK return: " + lineState);

        // Line encoding (9600 Baud)
        final byte[] lineEncoding = {
                (byte) 0x80, 0x25, 0x00, 0x00, 0x00, 0x00, 0x08
        };
        int lineEncode = connection.controlTransfer(0x21, 0x20, 0, 0, lineEncoding, 7, 0);
        if (lineEncode < 0) {
            Log.d(TAG, "Line encoding control transfer failed.");
            Log.d(TAG, "Return value: " + lineEncode);
            releaseUsbResources();
            arduinoState.onArduinoError(new Exception("Control frame transfer error"));
            return false;
        }
        Log.d(TAG, "Line encoding control frame: OK return: " + lineEncode);

        // I/O Endpoints
        for (int i = 0; i < usbInterface.getEndpointCount(); i++) {
            UsbEndpoint endpoint = usbInterface.getEndpoint(i);
            if (endpoint.getType() == UsbConstants.USB_ENDPOINT_XFER_BULK) {
                if (endpoint.getDirection() == UsbConstants.USB_DIR_IN) {
                    arduinoIn = usbInterface.getEndpoint(i);
                } else {
                    arduinoOut = usbInterface.getEndpoint(i);
                }
            }
        }

        // Ensure we found the endpoints
        if (arduinoIn == null || arduinoOut == null) {
            releaseUsbResources();
            arduinoState.onArduinoError(new Exception("No usb endpoints found"));
            return false;
        }
        Log.d(TAG, "I/O Enpoints found");
        arduinoConnected = true;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return arduinoConnected;
}

これは通常の logcat 出力です。

V/UsbHostManager( 2733): USB HOST UEVENT: {SUBSYSTEM=host_notify, STATE=ADD, DEVNAME=usb_otg, DEVPATH=/devices/virtual/host_notify/usb_otg, SEQNUM=18860, ACTION=change}
D/UsbHostManager( 2733): turnOnLcd :: 
D/UsbHostNotification( 2733): setUsbObserverNotification : cancel id = 998563545, device = UsbDevices
D/UsbHostNotification( 2733): setUsbObserverNotification : notify id = 998563545, device = UsbDevices, title = USB connector connected.
D/UsbHostNotification( 2733): send the timeout : current  1413981920804, vailed = -2999, displayed = 1413981920803
D/UsbHostNotification( 2733): setUsbObserverNotification : cancel id = 998563545, device = UsbDevices
D/UsbHostManager( 2733): usbDeviceAdded : device :: /dev/bus/usb/002/077 [2341h:003dh] [02h,00h,00h] (CDC Control)
D/UsbHostManager( 2733): usbDeviceAdded : interface :: /dev/bus/usb/002/077 [2341h:003dh] [02h,02h,01h] (CDC Control)
D/UsbHostManager( 2733): usbDeviceAdded : interface :: /dev/bus/usb/002/077 [2341h:003dh] [0ah,00h,00h] (CDC Data)
D/UsbSettingsManager( 2733): deviceAttached: /dev/bus/usb/002/077 def package com.realart.Beatmaker
D/UsbSettingsManager( 2733): deviceAttached, send intent Intent { act=android.hardware.usb.action.USB_DEVICE_ATTACHED flg=0x10000000 (has extras) }
D/UsbSettingsManager( 2733): deviceAttached, call to resolveActivity started, Intent { act=android.hardware.usb.action.USB_DEVICE_ATTACHED flg=0x10000000 (has extras) }
D/UsbSettingsManager( 2733): resolveActivity : matches count = 1, defaultPackage = com.realart.Beatmaker
D/UsbSettingsManager( 2733): resolveActivity : defaultRI = ResolveInfo{425e9ad0 com.realart.Beatmaker/.UnityPlayerNativeActivity m=0x108000}
D/UsbSettingsManager( 2733): grantDevicePermission: UsbDevice[mName=/dev/bus/usb/002/077,mVendorId=9025,mProductId=61,mClass=2,mSubclass=0,mProtocol=0,mInterfaces=[Landroid.hardware.usb.UsbInterface;@42d33850] for 10212
D/UsbSettingsManager( 2733): grantDevicePermission: mDevicePermissionMap put UsbDevice[mName=/dev/bus/usb/002/077,mVendorId=9025,mProductId=61,mClass=2,mSubclass=0,mProtocol=0,mInterfaces=[Landroid.hardware.usb.UsbInterface;@42d33850] for {}
D/UsbSettingsManager( 2733): resolveActivity : permissionsGranted to ResolveInfo{425e9ad0 com.realart.Beatmaker/.UnityPlayerNativeActivity m=0x108000}
D/UsbSettingsManager( 2733): deviceAttached, call to resolveActivity ended, Intent { act=android.hardware.usb.action.USB_DEVICE_ATTACHED flg=0x10000000 cmp=com.realart.Beatmaker/.UnityPlayerNativeActivity (has extras) }
D/Unity   (30871): Device connected
D/Unity   (30871): Permission denied
D/Unity   (30871): Asking for permission and trying again...
D/UsbSettingsManager( 2733): requestPermission:/dev/bus/usb/002/077 ,pi PendingIntent{42169a08: PendingIntentRecord{42c42748 com.realart.Beatmaker broadcastIntent}}
D/UsbSettingsManager( 2733): Request Permission for Device vendorId: 9025, productId: 61, package: com.realart.Beatmaker
D/UsbSettingsManager( 2733): hasPermission++
D/UsbSettingsManager( 2733): hasPermission: UsbDevice[mName=/dev/bus/usb/002/077,mVendorId=9025,mProductId=61,mClass=2,mSubclass=0,mProtocol=0,mInterfaces=[Landroid.os.Parcelable;@4360cc38]for {10212=true}
D/UsbSettingsManager( 2733): requestPermission:/dev/bus/usb/002/077 has permissions
D/Unity   (30871): Permissions receiver hit
D/Unity   (30871): Action requested: com.realart.Beatmaker.USB_PERMISSION
D/Unity   (30871): Checking permissions from user...
D/Unity   (30871): Permissions granted: true
D/Unity   (30871): Device name: /dev/bus/usb/002/077
D/Unity   (30871): Vender id: 9025
D/Unity   (30871): Product id: 61
D/Unity   (30871): Class: class android.hardware.usb.UsbDevice
D/Unity   (30871): Sub-class: 0
D/Unity   (30871): Protocol: 0
D/Unity   (30871): Num Interfaces: 2
D/Unity   (30871): Device hash: 263427216
D/Arduino (30871): USB Interface claimed: false
D/Arduino (30871): Trying again with kernel driver
D/Arduino (30871): Unable to claim interface.
D/UsbSettingsManager( 2733): checkPermission: /dev/bus/usb/002/077
D/UsbSettingsManager( 2733): hasPermission++
D/UsbSettingsManager( 2733): hasPermission: UsbDevice[mName=/dev/bus/usb/002/077,mVendorId=9025,mProductId=61,mClass=2,mSubclass=0,mProtocol=0,mInterfaces=[Landroid.hardware.usb.UsbInterface;@42d33850]for {10212=true}

次の行がlogcatに出力された後、顕著なタイムアウトがあるようです:

D/UsbHostNotification( 2733): send the timeout : current  1413981920804, vailed = -2999, displayed = 1413981920803
D/UsbHostNotification( 2733): setUsbObserverNotification : cancel id = 998563545, device = UsbDevices

アプリケーションの残りの部分が十分に速く継続する場合、問題は発生しませんが、そのステップで数秒間ハングすると、毎回失敗します。しかし、いつも同じ場所にいるとは限りません。インターフェースを要求しようとするとき、制御転送を送信するとき、失敗メッセージがないのにデータが受信されないことがあります。

アプリケーションが起動されると、logcat の出力は次のようになります。

--------- beginning of /dev/log/system
D/UsbHostNotification( 2733): setUsbObserverNotification : cancel id = 998563545, device = UsbDevices
--------- beginning of /dev/log/main
V/UsbHostManager( 2733): USB HOST UEVENT: {SUBSYSTEM=host_notify, STATE=ADD, DEVNAME=usb_otg, DEVPATH=/devices/virtual/host_notify/usb_otg, SEQNUM=19659, ACTION=change}
D/UsbHostManager( 2733): turnOnLcd :: 
D/UsbHostNotification( 2733): setUsbObserverNotification : cancel id = 998563545, device = UsbDevices
D/UsbHostNotification( 2733): setUsbObserverNotification : notify id = 998563545, device = UsbDevices, title = USB connector connected.
D/UsbHostNotification( 2733): send the timeout : current  1413982261198, vailed = -2991, displayed = 1413982261189
D/UsbHostManager( 2733): usbDeviceAdded : device :: /dev/bus/usb/002/081 [2341h:003dh] [02h,00h,00h] (CDC Control)
D/UsbHostManager( 2733): usbDeviceAdded : interface :: /dev/bus/usb/002/081 [2341h:003dh] [02h,02h,01h] (CDC Control)
D/UsbHostManager( 2733): usbDeviceAdded : interface :: /dev/bus/usb/002/081 [2341h:003dh] [0ah,00h,00h] (CDC Data)
D/UsbSettingsManager( 2733): deviceAttached: /dev/bus/usb/002/081 def package com.realart.Beatmaker
D/UsbSettingsManager( 2733): deviceAttached, send intent Intent { act=android.hardware.usb.action.USB_DEVICE_ATTACHED flg=0x10000000 (has extras) }
D/UsbSettingsManager( 2733): deviceAttached, call to resolveActivity started, Intent { act=android.hardware.usb.action.USB_DEVICE_ATTACHED flg=0x10000000 (has extras) }
D/UsbSettingsManager( 2733): resolveActivity : matches count = 1, defaultPackage = com.realart.Beatmaker
D/UsbSettingsManager( 2733): resolveActivity : defaultRI = ResolveInfo{42458358 com.realart.Beatmaker/.UnityPlayerNativeActivity m=0x108000}
D/UsbSettingsManager( 2733): grantDevicePermission: UsbDevice[mName=/dev/bus/usb/002/081,mVendorId=9025,mProductId=61,mClass=2,mSubclass=0,mProtocol=0,mInterfaces=[Landroid.hardware.usb.UsbInterface;@4259eeb8] for 10212
D/UsbSettingsManager( 2733): grantDevicePermission: mDevicePermissionMap put UsbDevice[mName=/dev/bus/usb/002/081,mVendorId=9025,mProductId=61,mClass=2,mSubclass=0,mProtocol=0,mInterfaces=[Landroid.hardware.usb.UsbInterface;@4259eeb8] for {}
D/UsbSettingsManager( 2733): resolveActivity : permissionsGranted to ResolveInfo{42458358 com.realart.Beatmaker/.UnityPlayerNativeActivity m=0x108000}
D/UsbSettingsManager( 2733): deviceAttached, call to resolveActivity ended, Intent { act=android.hardware.usb.action.USB_DEVICE_ATTACHED flg=0x10000000 cmp=com.realart.Beatmaker/.UnityPlayerNativeActivity (has extras) }
D/UsbHostManager( 2733): onUEvent(device) :: action = add, devtype = usb_interface, device = null, product = 2341/3d/1, type = 2/0/0, interface = 2/2/1, devpath = /devices/platform/exynos-dwc3.0/exynos-xhci.0/usb2/2-1/2-1:1.0
D/UsbHostManager( 2733): onUEvent(device) :: action = add, devtype = usb_interface, device = null, product = 2341/3d/1, type = 2/0/0, interface = 10/0/0, devpath = /devices/platform/exynos-dwc3.0/exynos-xhci.0/usb2/2-1/2-1:1.1
D/Unity   (31983): Device name: /dev/bus/usb/002/081
D/Unity   (31983): Vender id: 9025
D/Unity   (31983): Product id: 61
D/Unity   (31983): Class: class android.hardware.usb.UsbDevice
D/Unity   (31983): Sub-class: 0
D/Unity   (31983): Protocol: 0
D/Unity   (31983): Num Interfaces: 2
D/Unity   (31983): Device hash: 263427241
D/Arduino (31983): USB Interface claimed: true
D/Arduino (31983): Data Transfter setup
D/Arduino (31983): Line state control frame: OK return: 0
D/Arduino (31983): Line encoding control frame: OK return: 7
D/Arduino (31983): I/O Enpoints found
D/Arduino (31983): Arduino bus initialized
D/UsbSettingsManager( 2733): checkPermission: /dev/bus/usb/002/081
D/UsbSettingsManager( 2733): hasPermission++
D/UsbSettingsManager( 2733): hasPermission: UsbDevice[mName=/dev/bus/usb/002/081,mVendorId=9025,mProductId=61,mClass=2,mSubclass=0,mProtocol=0,mInterfaces=[Landroid.hardware.usb.UsbInterface;@4259eeb8]for {10212=true}
D/Arduino (31983): Receiver thread started
D/Unity   (31983): onArduinoReady
D/Arduino (31983): resetArduino
V/Unity   (31983): sending message to unity = reset
V/Unity   (31983): sending message to unity = onArduinoReady

アプリケーションが起動され、デバイスが接続され、onNewIntentメソッドがヒットすると、アクセス許可拒否ブロックが毎回ヒットされますが、アクセス許可を求めるプロンプトは表示されませんか?

このタブレットでこの動作が非常に奇妙である理由を誰か知っていますか?

モデル：SM-T800

Android バージョン:4.4.2

カーネル バージョン:3.4.39-2010469

ビルド番号：KOT49H.T800XXU1ANFB