Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices();
ArrayList<String> deviceNames = new ArrayList<>();
final ArrayList<BluetoothDevice> devices = new ArrayList<>();
if (pairedDevices.size() > 0) {
for (BluetoothDevice device : pairedDevices) {
deviceNames.add(device.getName() + "\n" + device.getAddress());
devices.add(device);
}
} else {
Toast.makeText(this, "No paired devices found", Toast.LENGTH_SHORT).show();
return;
}
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Select Bluetooth Device");
builder.setItems(deviceNames.toArray(new CharSequence[deviceNames.size()]), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
BluetoothDevice device = devices.get(which);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.BLUETOOTH_CONNECT, Manifest.permission.BLUETOOTH_SCAN}, REQUEST_PERMISSIONS);
return;
}
}
ConnectThread connectThread = new ConnectThread(device);
connectThread.start();
}
});
builder.show();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_ENABLE_BT) {
if (resultCode == RESULT_OK) {
showPairedDevices();
} else {
Toast.makeText(this, "Bluetooth is required to run this application", Toast.LENGTH_LONG).show();
finish();
}
}
super.onActivityResult(requestCode, resultCode, data);
}
private class ConnectThread extends Thread {
private final BluetoothDevice device;
public ConnectThread(BluetoothDevice device) {
BluetoothSocket tmp = null;
this.device = device;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.BLUETOOTH_CONNECT, Manifest.permission.BLUETOOTH_SCAN}, REQUEST_PERMISSIONS);
return;
}
}
try {
tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {
Log.e(TAG, "Socket's create() method failed", e);
}
bluetoothSocket = tmp;
}
public void run() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.BLUETOOTH_CONNECT, Manifest.permission.BLUETOOTH_SCAN}, REQUEST_PERMISSIONS);
return;
}
}
bluetoothAdapter.cancelDiscovery();
try {
bluetoothSocket.connect();
manageConnectedSocket();
} catch (IOException e) {
try {
bluetoothSocket.close();
} catch (IOException closeException) {
Log.e(TAG, "Could not close the client socket", closeException);
}
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this, "Unable to connect to device. Please try again.", Toast.LENGTH_LONG).show();
}
});
}
}
}
private void manageConnectedSocket() {
try {
inputStream = bluetoothSocket.getInputStream();
final byte[] buffer = new byte[1024];
int bytes;
while (true) {
try {
bytes = inputStream.read(buffer);
String readMessage = new String(buffer, 0, bytes).trim();
if (readMessage.isEmpty()) {
continue;
}
Log.d(TAG, "Received message: " + readMessage);
Message msg = handler.obtainMessage();
Bundle bundle = new Bundle();
bundle.putString("posture", readMessage);
msg.setData(bundle);
handler.sendMessage(msg);
} catch (IOException e) {
Log.e(TAG, "Error occurred when reading input stream", e);
runOnUiThread(() ->
Toast.makeText(MainActivity.this, "Error occurred during communication. Please try again.", Toast.LENGTH_LONG).show());
break;
}
}
} catch (IOException e) {
Log.e(TAG, "Error occurred when creating input stream", e);
runOnUiThread(() ->
Toast.makeText(MainActivity.this, "Error occurred during communication setup. Please try again.", Toast.LENGTH_LONG).show());
}
}
private void showStretchingImages(String posture) {
int[] stretchImages = getStretchImagesForPosture(posture);
if (stretchImages == null) {
return;
}
new CountDownTimer(270000, 30000) {
int index = 0;
@Override
public void onTick(long millisUntilFinished) {
if (index < stretchImages.length) {
stretchImageView.setImageResource(stretchImages[index]);
index++;
}
}
@Override
public void onFinish() {
}
}.start();
}
private int[] getStretchImagesForPosture(String posture) {
int[] images = null;
switch (posture) {
case "GOOD":
images = new int[]{R.drawable.p1, R.drawable.w1, R.drawable.w2, R.drawable.w3, R.drawable.w4,
R.drawable.w5, R.drawable.w6, R.drawable.w7, R.drawable.w8};
break;
case "SLIGHT":
images = new int[]{R.drawable.p2, R.drawable.w9, R.drawable.w10, R.drawable.w11, R.drawable.w12,
R.drawable.w13, R.drawable.w14, R.drawable.w15, R.drawable.w16};
break;
case "BAD":
images = new int[]{R.drawable.p3, R.drawable.w17, R.drawable.w18, R.drawable.w19, R.drawable.w20,
R.drawable.w21, R.drawable.w22, R.drawable.w23, R.drawable.w24};
break;
}
return images;
}
}
