Received process

 @Override
    public boolean handleMessage(Message msg) {
        switch (msg.what) {
            case Constants.MESSAGE_STATE_CHANGE:
                Log.d(TAG, "Change State");
                switch (msg.arg1) {
                    case BluetoothService.STATE_CONNECTED:
                        Log.d(TAG, "Connected");
                        Toast.makeText(this, R.string.title_connected, Toast.LENGTH_SHORT).show();
                        break;
                    case BluetoothService.STATE_CONNECTING:
                        Log.d(TAG, "Connecting");
                        Toast.makeText(this, R.string.title_connecting, Toast.LENGTH_SHORT).show();
                        break;
                    case BluetoothService.STATE_LISTEN:
                    case BluetoothService.STATE_NONE:
                        Log.d(TAG, "Fail");
                        Toast.makeText(this, R.string.title_not_connected, Toast.LENGTH_SHORT).show();
                        break;
                }
                break;
            case Constants.MESSAGE_READ:
                Log.d(TAG, "Read");
                process((byte[]) msg.obj, msg.arg1);
                break;
            case Constants.MESSAGE_DEVICE_NAME:
                // save the connected device's name
                connectedDeviceName = msg.getData().getString(Constants.DEVICE_NAME);
                Toast.makeText(this, "Connected to "
                        + connectedDeviceName, Toast.LENGTH_SHORT).show();
                break;
        }
        return false;
    }

    private void process(byte[] rxPacket, int bytes) {
        for(int i = 0; i < bytes; i++) {
            switch(rxPacket[i]) {
                case START_POINT:
                    rxFlag = true;
                    break;
                case END_POINT:
                    rxFlag = false;
                    break;
                default:
                    if(rxFlag) {
                        switch(rxPacket[i]) {
                            case 'H':
                                emotionView.setImageResource(R.drawable.figure_happy);
                                break;
                            case 'A':
                                emotionView.setImageResource(R.drawable.figure_angry);
                                break;
                            case 'D':
                                emotionView.setImageResource(R.drawable.figure_depressed);
                                break;
                            case 'R':
                                emotionView.setImageResource(R.drawable.figure_sleeping);
                                break;
                            case 'N':
                                emotionView.setImageResource(R.drawable.figure_standing);
                                break;
                        }
                    }
                    break;
            }
        }
    }
}