I am want to separate the strings incoming from arduino and store it in variables for database purposes but when I try to divide that string using split() after a few moments the exception occurs java.lang.ArrayIndexOutOfBoundsException: length=1; index=1 and the app keeps stopping the error is at Line 203 separated[1]
public class MainActivity extends AppCompatActivity {
private static final String TAG = "Android-Arduino";
Button btnOn, btnOff;
TextView temperatureText, heartbeatText;
Handler h;
final int RECIEVE_MESSAGE = 1;
private BluetoothAdapter btAdapter = null;
private BluetoothSocket btSocket = null;
private StringBuilder sb = new StringBuilder();
private ConnectedThread connectedThread;
// Common service that bluetooth device support
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
// MAC address of the bluetooth module.
private static String address = "00:18:E4:35:75:A6";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
temperatureText = (TextView) findViewById(R.id.temp);
heartbeatText = (TextView)findViewById(R.id.heartbeat);
getDataArduino();
// Bluetooth adapter
btAdapter = BluetoothAdapter.getDefaultAdapter();
// Check whether the bluetooth is enabled / disabled
checkBTState();
}
// Creates the communication chanel
private BluetoothSocket createBluetoothSocket(BluetoothDevice device) throws IOException {
if(Build.VERSION.SDK_INT >= 10){
try {
final Method m = device.getClass().
getMethod("createInsecureRfcommSocketToServiceRecord", new Class[]{UUID.class });
return (BluetoothSocket) m.invoke(device, MY_UUID);
} catch (Exception e) {
Log.e(TAG, "Could not create Insecure RFComm Connection",e);
}
}
return device.createRfcommSocketToServiceRecord(MY_UUID);
}
@Override
public void onResume() {
super.onResume();
// Set up a pointer to the remote node using it's address.
BluetoothDevice device = btAdapter.getRemoteDevice(address);
try {
btSocket = createBluetoothSocket(device);
} catch (IOException e) {
errorExit("Fatal Error", "In onResume() and socket create failed: "
+ e.getMessage() + ".");
}
btAdapter.cancelDiscovery();
try {
btSocket.connect();
} catch (IOException e) {
try {
btSocket.close();
} catch (IOException ex) {
errorExit("Fatal Error", "In onResume() and unable to close socket during " +
"connection failure" + ex.getMessage() + ".");
}
}
// Creates the data stream with the server
connectedThread = new ConnectedThread(btSocket);
connectedThread.start();
}
@Override
public void onPause() {
super.onPause();
try {
btSocket.close();
} catch (IOException ex) {
errorExit("Fatal Error", "In onPause() and failed to close socket." +
ex.getMessage() + ".");
}
}
private void checkBTState() {
// Checks if the devices has bluetooth functionalities
if(btAdapter==null) {
errorExit("Fatal Error", "Bluetooth not support");
} else {
// Checks if the bluetooth is on
if (btAdapter.isEnabled()) {
} else {
// Prompt user to turn on Bluetooth
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, 1);
}
}
}
private void errorExit(String title, String message){
Toast.makeText(getBaseContext(), title + " - " + message, Toast.LENGTH_LONG).show();
finish();
}
private class ConnectedThread extends Thread {
private final InputStream mmInStream;
private final OutputStream mmOutStream;
public ConnectedThread(BluetoothSocket socket) {
InputStream tmpIn = null;
OutputStream tmpOut = null;
// Get the input and output streams, using temp objects because
// member streams are final
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) { }
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
public void run() {
byte[] buffer = new byte[256]; // buffer store for the stream
int bytes; // bytes returned from read()
// Keep listening to the InputStream until an exception occurs
while (true) {
try {
// Read from the InputStream
// Get number of bytes and message in "buffer"
bytes = mmInStream.read(buffer);
// Send to message queue Handler
h.obtainMessage(RECIEVE_MESSAGE, bytes, -1, buffer).sendToTarget();
} catch (IOException e) {
break;
}
}
}
//Call this from the main activity to send data to the remote device
public void write(String message) {
byte[] msgBuffer = message.getBytes();
try {
mmOutStream.write(msgBuffer);
} catch (IOException e) {
Log.d(TAG, "...Error data send: " + e.getMessage() + "...");
}
}
}
public void getDataArduino() {
temperatureText.clearComposingText();
h = new Handler() {
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case RECIEVE_MESSAGE:
byte[] readBuf = (byte[]) msg.obj;
String strIncom = new String(readBuf, 0, msg.arg1);
sb.append(strIncom);
int endOfLineIndex = sb.indexOf("\n");
if (endOfLineIndex > 0) {
String sbprint = sb.substring(0, endOfLineIndex);
sb.delete(0, sb.length());
String[] separated = sbprint.split(":");
heartbeatText.setText(separated[0]+ "");
temperatureText.setText(separated[1]+ "");
}
Log.d(TAG, "...String:"+ sb.toString() + "Byte:" + msg.arg1 + "...");
break;
}
}
};
}
}
I need the temperature to display differently and heartrate to be displayed individually.
