DeviceScanner (Java)
ru.neuromd.neurosdk
Class DeviceScanner
Contents
Related Classes
ru.neuromd.neurosdk.Device
Classes hierarchy
- java.lang.Object
- ru.neuromd.neurosdk.DeviceScanner
Class definition
public class DeviceScanner
DeviceScanner class provides simple interface for searching or getting by BLE address of Callibri and Brainbit devices and for acquiring Device abstraction for them.
Fields Summary
Modifier and Type | Field and Description |
SubscribersNotifier<Device> | deviceFound
Subscribe this event to receive notifications about found devices |
SubscribersNotifier<Boolean> | scanStateChanged
Notifies about changes in device scanning state |
Constructor Summary
Constructor | Description |
DeviceScanner(Context context) | Creates new instance of DeviceScanner class with current application context |
Methods Summary
Modifier and Type | Method and Description |
void | startScan(int timeout)
Starts scanning for devices |
void | stopScan()
Stops scanning |
Device[] | getDeviceByAddress(String address)
Looks for device with specified address and returns Device object for it if found, otherwise returns null. |
Field Detail
deviceFound
public final SubscribersNotifier<Device> deviceFound
Subscribe this event to receive notifications about found devices
scanStateChanged
public final SubscribersNotifier<Boolean> scanStateChanged
Notifies about changes in device scanning state. True - scanning is in process, false otherwise.
Method Detail
startScan
public void startScan(int timeout)
Starts scanning process. For Android versions 6.0 and higher geolocation module should be enabled due to security requirement of Android OS
- Returns:
- timeout - Duration of scanning process in milliseconds. Zero for infinity
- Throws:
- BluetoothAdapterException - if Bluetooth adapter is disabled, this exeption will be thrown
- BluetoothPermissionsException - is thrown when Bluetooth an Geolocations permissions was not granted
stopScan
public void stopScan()
Stops scanning process
getDeviceByAddress
public Device[] getDeviceByAddress(String address)
Looks for device with specified address and returns Device object for it if found, or null otherwise.
- Returns:
- Device object for device with specified address
Example
This example shows how to find devices and list their features
import com.neuromd.common.INotificationCallback; import com.neuromd.neurosdk.Device; import com.neuromd.neurosdk.DeviceScanner; import com.neuromd.neurosdk.channels.ChannelInfo; import com.neuromd.neurosdk.parameters.Command; import com.neuromd.neurosdk.parameters.Parameter; import com.neuromd.neurosdk.parameters.ParameterName; import com.neuromd.neurosdk.parameters.types.DeviceState; public class DeviceInfoActivity extends AppCompatActivity { private DeviceScanner mScanner; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_device_info); requestPermissions(); enableBtAndGeolocation(); initScanner(); initButtons(); } private void initScanner() { mScanner = new DeviceScanner(getApplicationContext()); mScanner.scanStateChanged.subscribe(new INotificationCallback<Boolean>() { @Override public void onNotify(Object o, final Boolean isScanning) { runOnUiThread(new Runnable() { @Override public void run() { Button startButton = findViewById(R.id.startScanButton); Button stopButton = findViewById(R.id.stopScanButton); startButton.setEnabled(!isScanning); stopButton.setEnabled(isScanning); } }); } }); mScanner.deviceFound.subscribe(new INotificationCallback<Device>() { @Override public void onNotify(Object o, Device device) { onDeviceFound(device); } }); } private void requestPermissions(){ if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1); } } private void enableBtAndGeolocation(){ Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(enableBtIntent, 1); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){ final LocationManager manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE ); if ( !manager.isProviderEnabled( LocationManager.GPS_PROVIDER ) ) { Intent enableGeoIntent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS); startActivityForResult(enableGeoIntent, 1); } } } private void initButtons() { Button startButton = findViewById(R.id.startScanButton); startButton.setEnabled(true); startButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mScanner.startScan(0); //zero is for infinity } }); Button stopButton = findViewById(R.id.stopScanButton); stopButton.setEnabled(false); stopButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mScanner.stopScan(); } }); } private void onDeviceFound(final Device device) { device.parameterChanged.subscribe(new INotificationCallback<ParameterName>() { @Override public void onNotify(Object o, ParameterName parameterName) { if (parameterName == ParameterName.State){ DeviceState state = device.readParam(ParameterName.State); if (state == DeviceState.Connected){ runOnUiThread(new Runnable() { @Override public void run() { onDeviceConnected(device); } }); } } } }); device.connect(); } private void onDeviceConnected(Device device) { EditText deviceInfoText = findViewById(R.id.infoText); String deviceName = device.readParam(ParameterName.Name); String deviceAddress = device.readParam(ParameterName.Address); deviceInfoText.append(String.format("Found device: %s [%s]\n", deviceName, deviceAddress)); deviceInfoText.append("Supported params:\n"); Parameter[] deviceParams = device.parameters(); for (Parameter param : deviceParams) { String paramName = param.getName().toString(); String accessMode = param.getAccess().toString(); deviceInfoText.append(String.format("-%s {%s}\n", paramName, accessMode)); } deviceInfoText.append("\nSupported commands:\n"); Command[] deviceCommands = device.commands(); for (Command cmd : deviceCommands) { deviceInfoText.append(String.format("-%s \n", cmd.toString())); } deviceInfoText.append("\nSupported channels:\n"); ChannelInfo[] deviceChannels = device.channels(); for (ChannelInfo channel : deviceChannels) { String channelName = channel.getName(); deviceInfoText.append(String.format("-%s \n", channelName)); } } }
Possible output: