Android Java Communication over USB

Question

I'd like to send a object/string from Android device to PC in Java over USB. It is possible? Basically a client/server over USB.

Actually, using the emulator, I can access the server socket via the special 10.0.2.2 address. Over Wi-fi, i can access with 192.168.1.X address. And over USB, how it works?

According to this, I guess it's possible but, how I do the sample code in java instead of python? any ideas?

private Byte[] bytes
private static int TIMEOUT = 5000;
private boolean forceClaim = true
UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);
HashMap<String, UsbDevice> deviceList = manager.getDeviceList();
Iterator<UsbDevice> deviceIterator = deviceList.values().iterator();
while(deviceIterator.hasNext()){
    UsbDevice device = deviceIterator.next()
    UsbInterface intf = device.getInterface(0);
    UsbEndpoint endpoint = intf.getEndpoint(0);
    UsbDeviceConnection connection = mUsbManager.openDevice(device); 
    connection.claimInterface(intf, forceClaim);
    bytes = toByteArray("any path");
    connection.bulkTransfer(endpoint, bytes, bytes.length, TIMEOUT); 
}


public static byte[] toByteArray(File file) throws IOException { 
   ByteArrayOutputStream out = new ByteArrayOutputStream(); 
   boolean threw = true; 
   InputStream in = new FileInputStream(file); 
   try { 
     byte[] buf = new byte[BUF_SIZE]; 
     long total = 0; 
     while (true) { 
       int r = in.read(buf); 
       if (r == -1) {
         break; 
       }
       out.write(buf, 0, r); 
     } 
     threw = false; 
   } finally { 
     try { 
       in.close(); 
     } catch (IOException e) { 
       if (threw) { 
         log.warn("IOException thrown while closing", e); 
       } else {
         throw e;
       } 
     } 
   } 
   return out.toByteArray(); 
 }

aandroidtest aandroidtest · Accepted Answer · 2013-03-19T01:32:01

My suggestion is to use text file.

Save the text file in your sdcard. Then in your PC java program, execute adb pull command.

This way if your phone is connected to your PC over USB, the file will be pulled from the phone to the PC upon the adb pull execution.

Of course need to have adb in your PC and USB debugging allowed in you phone.

Hope this helps.

Regards

Android Java Communication over USB

1 Answers