Read Data From Paired Bluetooth Devices In Android

I am working on an android 4.0 application which reads data from the paired bluetooth device. I am able to search discoverable bluetooth device and pair the devices. However, I am

Solution 1:

Yes there is. The socket you receive can give you an InputStream instance. If the socket is connected, you can then read data (char, String or byte, depending on what reader you will wrap around your InputStream, if you wrap one).

To open a serial port with the device, you have to use the Serial Port Profile in the UUID you use to create your socket. A simple UUID thrown around on the web is

00001101-0000-1000-8000-00805F9B34FB

You can then create your socket, connect to it, get streams and read/write bytes with them. Example :

privatestaticfinalStringUUID_SERIAL_PORT_PROFILE="00001101-0000-1000-8000-00805F9B34FB";

privateBluetoothSocketmSocket=null;
privateBufferedReadermBufferedReader=null;

privatevoidopenDeviceConnection(BluetoothDevice aDevice)throws IOException {
    InputStreamaStream=null;
    InputStreamReaderaReader=null;
    try {
        mSocket = aDevice
                .createRfcommSocketToServiceRecord( getSerialPortUUID() );
        mSocket.connect();
        aStream = mSocket.getInputStream();
        aReader = newInputStreamReader( aStream );
        mBufferedReader = newBufferedReader( aReader );
    } catch ( IOException e ) {
        Log.e( TAG, "Could not connect to device", e );
        close( mBufferedReader );
        close( aReader );
        close( aStream );
        close( mSocket );
        throw e;
    }
}

privatevoidclose(Closeable aConnectedObject) {
    if ( aConnectedObject == null ) return;
    try {
        aConnectedObject.close();
    } catch ( IOException e ) {
    }
    aConnectedObject = null;
}

private UUID getSerialPortUUID() {
    return UUID.fromString( UUID_SERIAL_PORT_PROFILE );
}

And then, somewhere in your code you can read from the reader:

StringaString= mBufferedReader.readLine();

And you can do the same thing in opposite direction using OutputStream and various writers.