@Override
protected void onResume() {
super.onResume();
// Open a Bluetooth serial port and get ready to establish a connection
if (bluetoothSerial.checkBluetooth() && bluetoothSerial.isBluetoothEnabled()) {
if (!bluetoothSerial.isConnected()) {
bluetoothSerial.start();
}
}
}
@Override
protected void onStop() {
super.onStop();
// Disconnect from the remote device and close the serial port
bluetoothSerial.stop();
}
@Override
protected void onStart() {
super.onStart();
// Check Bluetooth availability on the device and set up the Bluetooth adapter
bluetoothSerial.setup();
}
@Override
public void onBluetoothSerialRead(String message) {
// Print the incoming message on the terminal screen
tvTerminal.append(
getString(
R.string.terminal_message_template, bluetoothSerial.getConnectedDeviceName(), message));
svTerminal.post(scrollTerminalToBottom);
}
@Override
public void onBluetoothSerialWrite(String message) {
// Print the outgoing message on the terminal screen
tvTerminal.append(
getString(
R.string.terminal_message_template, bluetoothSerial.getLocalAdapterName(), message));
svTerminal.post(scrollTerminalToBottom);
}
private void showDeviceListDialog() {
// Display dialog for selecting a remote Bluetooth device
BluetoothDeviceListDialog dialog = new BluetoothDeviceListDialog(this);
dialog.setOnDeviceSelectedListener(this);
dialog.setTitle(R.string.paired_devices);
dialog.setDevices(bluetoothSerial.getPairedDevices());
dialog.showAddress(true);
dialog.useDarkTheme(true);
dialog.show();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case REQUEST_ENABLE_BLUETOOTH:
// Set up Bluetooth serial port when Bluetooth adapter is turned on
if (resultCode == Activity.RESULT_OK) {
bluetoothSerial.setup();
}
break;
}
}
@Override
public void invalidateOptionsMenu() {
if (bluetoothSerial == null) return;
// Show or hide the "Connect" and "Disconnect" buttons on the app bar
if (bluetoothSerial.isConnected()) {
if (actionConnect != null) actionConnect.setVisible(false);
if (actionDisconnect != null) actionDisconnect.setVisible(true);
} else {
if (actionConnect != null) actionConnect.setVisible(true);
if (actionDisconnect != null) actionDisconnect.setVisible(false);
}
}
private void updateBluetoothState() {
// Get the current Bluetooth state
final int state;
if (bluetoothSerial != null) state = bluetoothSerial.getState();
else state = BluetoothSerial.STATE_DISCONNECTED;
// Display the current state on the app bar as the subtitle
String subtitle;
switch (state) {
case BluetoothSerial.STATE_CONNECTING:
subtitle = getString(R.string.status_connecting);
break;
case BluetoothSerial.STATE_CONNECTED:
subtitle = getString(R.string.status_connected, bluetoothSerial.getConnectedDeviceName());
break;
default:
subtitle = getString(R.string.status_disconnected);
break;
}
if (getSupportActionBar() != null) {
getSupportActionBar().setSubtitle(subtitle);
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_connect) {
showDeviceListDialog();
return true;
} else if (id == R.id.action_disconnect) {
bluetoothSerial.stop();
return true;
} else if (id == R.id.action_crlf) {
crlf = !item.isChecked();
item.setChecked(crlf);
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onBluetoothDeviceSelected(BluetoothDevice device) {
// Connect to the selected remote Bluetooth device
bluetoothSerial.connect(device);
}