10/30 21:06:27: Launching 'app' on KEYENCE DX-A600. Install successfully finished in 3 s 240 ms. $ adb shell am start -n "com.example.satobtprintertest/com.example.satobtprintertest.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER Connected to process 13469 on device 'keyence-dx_a600-C4AN000990'. Capturing and displaying logcat messages from application. This behavior can be disabled in the "Logcat output" section of the "Debugger" settings page. D/NetworkSecurityConfig: No Network Security Config specified, using platform default D/NetworkSecurityConfig: No Network Security Config specified, using platform default E/libc: Access denied finding property "ro.vendor.pref_scale_resolution" D/AppCompatDelegate: Checking for metadata for AppLocalesMetadataHolderService : Service not found W/tobtprintertes: Accessing hidden method Landroid/view/View;->computeFitSystemWindows(Landroid/graphics/Rect;Landroid/graphics/Rect;)Z (greylist, reflection, allowed) W/tobtprintertes: Accessing hidden method Landroid/view/ViewGroup;->makeOptionalFitsSystemWindows()V (greylist, reflection, allowed) I/LabelPrinter: +++ Label PRINTER +++ I/LabelPrinter: +++ SDK VERSION : V1.0.0 +++ I/SurfaceFactory: [static] sSurfaceFactory = com.mediatek.view.impl.SurfaceFactoryImpl@43a8398 D/ViewRootImpl[MainActivity]: hardware acceleration = true , fakeHwAccelerated = false, sRendererDisabled = false, forceHwAccelerated = false, sSystemRendererDisabled = false I/InputTransport: Create ARC handle: 0xb400007550d37f10 V/PhoneWindow: DecorView setVisiblity: visibility = 0, Parent = android.view.ViewRootImpl@b204144, this = DecorView@f36b22d[MainActivity] E/ion: ioctl c0044901 failed with code -1: Invalid argument I/SatoBTPrinterTest: Bluetooth Device not found ! D/SatoBTPrinterTest: Device is disconnected W/BluetoothAdapter: getBluetoothService() called with no BluetoothManagerCallback I/SatoBTPrinterTest: Device is connecting ! V/PhoneWindow: DecorView setVisiblity: visibility = 0, Parent = android.view.ViewRootImpl@b204144, this = DecorView@f36b22d[MainActivity] I/tobtprintertes: Background concurrent copying GC freed 9898(865KB) AllocSpace objects, 1(20KB) LOS objects, 49% free, 3409KB/6819KB, paused 63us total 425.573ms I/SatoBTPrinterTest: Connection is failed or disconnected ! I/SatoBTPrinterTest: Connection is failed or disconnected ! V/PhoneWindow: DecorView setVisiblity: visibility = 0, Parent = android.view.ViewRootImpl@b204144, this = DecorView@f36b22d[MainActivity] V/PhoneWindow: DecorView setVisiblity: visibility = 0, Parent = android.view.ViewRootImpl@b204144, this = DecorView@f36b22d[MainActivity] I/SatoBTPrinterTest: Bluetooth Device not found ! D/SatoBTPrinterTest: Device is disconnected W/BluetoothAdapter: getBluetoothService() called with no BluetoothManagerCallback I/SatoBTPrinterTest: Device is connecting ! D/BluetoothSocket: close() this: android.bluetooth.BluetoothSocket@c9c3891, channel: -1, mSocketIS: android.net.LocalSocketImpl$SocketInputStream@8e673f6, mSocketOS: android.net.LocalSocketImpl$SocketOutputStream@7b883f7mSocket: android.net.LocalSocket@9cfa264 impl:android.net.LocalSocketImpl@e3acccd fd:java.io.FileDescriptor@cfdd982, mSocketState: INIT I/SatoBTPrinterTest: Connection is failed or disconnected ! I/SatoBTPrinterTest: Connection is failed or disconnected !