android/src/com/hoho/android/usbserial/driver/CdcAcmSerialDriver.java

@@ -41,8 +41,8 @@ public class CdcAcmSerialDriver extends CommonUsbSerialDriver {
     private static final int SET_CONTROL_LINE_STATE = 0x22;
     private static final int SEND_BREAK = 0x23;
 
-    public CdcAcmSerialDriver(UsbDevice device, UsbDeviceConnection connection) {
-        super(device, connection);
+    public CdcAcmSerialDriver(UsbDevice device) {
+        super(device);
     }
 
     @Override

android/src/com/hoho/android/usbserial/driver/CommonUsbSerialDriver.java

@@ -36,25 +36,41 @@ abstract class CommonUsbSerialDriver implements UsbSerialDriver {
     public static final int DEFAULT_WRITE_BUFFER_SIZE = 16 * 1024;
 
     protected final UsbDevice   mDevice;
-    protected final UsbDeviceConnection mConnection;
-
     protected final Object      mReadBufferLock = new Object();
     protected final Object      mWriteBufferLock = new Object();
 
+    protected UsbDeviceConnection mConnection = null;
+
+    private int _permissionStatus = permissionStatusRequestRequired;
+
     /** Internal read buffer.  Guarded by {@link #mReadBufferLock}. */
     protected byte[] mReadBuffer;
 
     /** Internal write buffer.  Guarded by {@link #mWriteBufferLock}. */
     protected byte[] mWriteBuffer;
 
-    public CommonUsbSerialDriver(UsbDevice device, UsbDeviceConnection connection) {
+    public CommonUsbSerialDriver(UsbDevice device) {
         mDevice = device;
-        mConnection = connection;
 
         mReadBuffer = new byte[DEFAULT_READ_BUFFER_SIZE];
         mWriteBuffer = new byte[DEFAULT_WRITE_BUFFER_SIZE];
     }
 
+    @Override
+    public void setConnection(UsbDeviceConnection connection) {
+        mConnection = connection;
+    }
+
+    @Override
+    public int permissionStatus() {
+        return _permissionStatus;
+    }
+
+    @Override
+    public void setPermissionStatus(int permissionStatus) {
+        _permissionStatus = permissionStatus;
+    }
+
     /**
      * Returns the currently-bound USB device.
      *

android/src/com/hoho/android/usbserial/driver/Cp2102SerialDriver.java

@@ -61,8 +61,8 @@ public class Cp2102SerialDriver extends CommonUsbSerialDriver {
     private UsbEndpoint mReadEndpoint;
     private UsbEndpoint mWriteEndpoint; 
     
-    public Cp2102SerialDriver(UsbDevice device, UsbDeviceConnection connection) {
-        super(device, connection);
+    public Cp2102SerialDriver(UsbDevice device) {
+        super(device);
     }
     
     private int setConfigSingle(int request, int value) {

android/src/com/hoho/android/usbserial/driver/FtdiSerialDriver.java

@@ -211,8 +211,8 @@ public class FtdiSerialDriver extends CommonUsbSerialDriver {
      * @throws UsbSerialRuntimeException if the given device is incompatible
      *             with this driver
      */
-    public FtdiSerialDriver(UsbDevice usbDevice, UsbDeviceConnection usbConnection) {
-        super(usbDevice, usbConnection);
+    public FtdiSerialDriver(UsbDevice usbDevice) {
+        super(usbDevice);
         mType = null;
     }
 

android/src/com/hoho/android/usbserial/driver/ProlificSerialDriver.java

@@ -231,8 +231,8 @@ public class ProlificSerialDriver extends CommonUsbSerialDriver {
         return ((getStatus() & flag) == flag);
     }
 
-    public ProlificSerialDriver(UsbDevice device, UsbDeviceConnection connection) {
-        super(device, connection);
+    public ProlificSerialDriver(UsbDevice device) {
+        super(device);
     }
 
     @Override

android/src/com/hoho/android/usbserial/driver/UsbSerialDriver.java

@@ -83,6 +83,16 @@ public interface UsbSerialDriver {
     /** 2 stop bits. */
     public static final int STOPBITS_2 = 2;
 
+    public static final int permissionStatusSuccess =           0;
+    public static final int permissionStatusDenied =            1;
+    public static final int permissionStatusRequested =         2;
+    public static final int permissionStatusRequestRequired =   3;
+    public static final int permissionStatusOpen =              4;
+    public int permissionStatus();
+    public void setPermissionStatus(int permissionStatus);
+
+    public void setConnection(UsbDeviceConnection connection);
+
     /**
      * Returns the currently-bound USB device.
      *

android/src/com/hoho/android/usbserial/driver/UsbSerialProber.java

@@ -65,11 +65,7 @@ public enum UsbSerialProber {
             if (!testIfSupported(usbDevice, FtdiSerialDriver.getSupportedDevices())) {
                 return Collections.emptyList();
             }
-            final UsbDeviceConnection connection = manager.openDevice(usbDevice);
-            if (connection == null) {
-                return Collections.emptyList();
-            }
-            final UsbSerialDriver driver = new FtdiSerialDriver(usbDevice, connection);
+            final UsbSerialDriver driver = new FtdiSerialDriver(usbDevice);
             return Collections.singletonList(driver);
         }
     },
@@ -80,11 +76,7 @@ public enum UsbSerialProber {
             if (!testIfSupported(usbDevice, CdcAcmSerialDriver.getSupportedDevices())) {
                return Collections.emptyList();
             }
-            final UsbDeviceConnection connection = manager.openDevice(usbDevice);
-            if (connection == null) {
-                return Collections.emptyList();
-            }
-            final UsbSerialDriver driver = new CdcAcmSerialDriver(usbDevice, connection);
+            final UsbSerialDriver driver = new CdcAcmSerialDriver(usbDevice);
             return Collections.singletonList(driver);
         }
     },
@@ -95,11 +87,7 @@ public enum UsbSerialProber {
             if (!testIfSupported(usbDevice, Cp2102SerialDriver.getSupportedDevices())) {
                 return Collections.emptyList();
             }
-            final UsbDeviceConnection connection = manager.openDevice(usbDevice);
-            if (connection == null) {
-                return Collections.emptyList();
-            }
-            final UsbSerialDriver driver = new Cp2102SerialDriver(usbDevice, connection);
+            final UsbSerialDriver driver = new Cp2102SerialDriver(usbDevice);
             return Collections.singletonList(driver);
         }
     },
@@ -110,11 +98,7 @@ public enum UsbSerialProber {
             if (!testIfSupported(usbDevice, ProlificSerialDriver.getSupportedDevices())) {
                 return Collections.emptyList();
             }
-            final UsbDeviceConnection connection = manager.openDevice(usbDevice);
-            if (connection == null) {
-                return Collections.emptyList();
-            }
-            final UsbSerialDriver driver = new ProlificSerialDriver(usbDevice, connection);
+            final UsbSerialDriver driver = new ProlificSerialDriver(usbDevice);
             return Collections.singletonList(driver);
         }
     };

libs/qtandroidserialport/src/qserialport_android.cpp

@@ -197,7 +197,7 @@ bool QSerialPortPrivate::open(QIODevice::OpenMode mode)
 
     if (deviceId == BAD_PORT)
     {
-        qWarning() << "Error opening %s" << systemLocation.toLatin1().data();
+        qWarning() << "Error opening" << systemLocation.toLatin1().data();
         q_ptr->setError(QSerialPort::DeviceNotFoundError);
         return false;
     }