/** Reads the device info characteristics and updates the UI components */
private void readDeviceInfoCharacteristics() {
// Get all readable characteristics and descriptors of interest and add
// request to a request queue
BluetoothGattCharacteristic characteristic = null;
// Get model number
characteristic =
GattUtils.getCharacteristic(
mPickedDeviceGatt, Constants.DEVICE_INFO_SERVICE_UUID, Constants.MODEL_NUMBER_UUID);
mRequestQueue.addReadCharacteristic(mPickedDeviceGatt, characteristic);
// Get manufacturer name
characteristic =
GattUtils.getCharacteristic(
mPickedDeviceGatt,
Constants.DEVICE_INFO_SERVICE_UUID,
Constants.MANUFACTURER_NAME_UUID);
mRequestQueue.addReadCharacteristic(mPickedDeviceGatt, characteristic);
// Get system Id
characteristic =
GattUtils.getCharacteristic(
mPickedDeviceGatt, Constants.DEVICE_INFO_SERVICE_UUID, Constants.SYSTEM_ID_UUID);
mRequestQueue.addReadCharacteristic(mPickedDeviceGatt, characteristic);
mRequestQueue.execute();
}
/** Write the hello input descriptor to the device */
private void writeHelloInputCharacteristic() {
// Set the enable/disable notification settings
BluetoothGattCharacteristic notifyCharacteristic =
GattUtils.getCharacteristic(
mPickedDeviceGatt,
Constants.HELLO_SERVICE_UUID,
Constants.HELLO_CHARACTERISTIC_INPUT_UUID);
int notificationState = mSpinnerHelloInput.getSelectedItemPosition();
if (notificationState >= 0 && notificationState <= 2) {
BluetoothGattDescriptor descriptor =
GattUtils.getDescriptor(
mPickedDeviceGatt,
Constants.HELLO_SERVICE_UUID,
Constants.HELLO_CHARACTERISTIC_INPUT_UUID,
Constants.CLIENT_CONFIG_DESCRIPTOR_UUID);
if (notificationState > 0) {
mPickedDeviceGatt.setCharacteristicNotification(notifyCharacteristic, true);
if (notificationState == 1) {
descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
} else if (notificationState == 2) {
descriptor.setValue(BluetoothGattDescriptor.ENABLE_INDICATION_VALUE);
}
} else {
mPickedDeviceGatt.setCharacteristicNotification(notifyCharacteristic, false);
descriptor.setValue(BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE);
}
mRequestQueue.addWriteDescriptor(mPickedDeviceGatt, descriptor);
mRequestQueue.execute();
}
}
/**
* Reads the manufacturer name, model number, system id, battery level from the device and updates
* the UI
*/
private void readHelloConfigurationCharacteristic() {
BluetoothGattCharacteristic characteristic = null;
characteristic =
GattUtils.getCharacteristic(
mPickedDeviceGatt,
Constants.HELLO_SERVICE_UUID,
Constants.HELLO_CHARACTERISTIC_CONFIGURATION_UUID);
mRequestQueue.addReadCharacteristic(mPickedDeviceGatt, characteristic);
mRequestQueue.execute();
}
/** Reads the battery characteristics and updates the UI components */
private void readBatteryCharacteristic() {
// Get all readable characteristics and descriptors of interest and add
// request to a request queue
BluetoothGattCharacteristic characteristic = null;
// Get battery level
characteristic =
GattUtils.getCharacteristic(
mPickedDeviceGatt, Constants.BATTERY_SERVICE_UUID, Constants.BATTERY_LEVEL_UUID);
mRequestQueue.addReadCharacteristic(mPickedDeviceGatt, characteristic);
mRequestQueue.execute();
}
/** Reads the hello input characteristic and updates the UI components */
private void readHelloInputCharacteristic() {
// Get all readable characteristics and descriptors of interest and add
// request to a request queue
BluetoothGattDescriptor descriptor = null;
// Get client config descriptor: enable/disable notification
descriptor =
GattUtils.getDescriptor(
mPickedDeviceGatt,
Constants.HELLO_SERVICE_UUID,
Constants.HELLO_CHARACTERISTIC_INPUT_UUID,
Constants.CLIENT_CONFIG_DESCRIPTOR_UUID);
mRequestQueue.addReadDescriptor(mPickedDeviceGatt, descriptor);
mRequestQueue.execute();
}
/** Write the hello configuration characteristic to the device */
private void writeHelloConfigurationCharacteristic() {
BluetoothGattCharacteristic characteristic = null;
int blinks = 0;
try {
blinks = Integer.parseInt(mEditTextHelloConfiguration.getText().toString());
characteristic =
GattUtils.getCharacteristic(
mPickedDeviceGatt,
Constants.HELLO_SERVICE_UUID,
Constants.HELLO_CHARACTERISTIC_CONFIGURATION_UUID);
characteristic.setValue(blinks, BluetoothGattCharacteristic.FORMAT_UINT8, 0);
mRequestQueue.addWriteCharacteristic(mPickedDeviceGatt, characteristic);
} catch (Throwable t) {
Log.w(TAG, "invalid number of notifications");
mEditTextHelloConfiguration.setText("0");
}
mRequestQueue.addWriteCharacteristic(mPickedDeviceGatt, characteristic);
mRequestQueue.execute();
}
/** Main activity for the the Hello Client application */
public class MainActivity extends Activity
implements OnClickListener, Callback, OnItemSelectedListener {
private static final String TAG = Constants.TAG_PREFIX + "MainActivity";
private static final String FRAGMENT_DEVICE_PICKER = "DevicePickerDialog";
// Used to format timestamp for notification entries in the notification
// view
private static final SimpleDateFormat mFormatter =
new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
/**
* Callback object that the LE Gatt service calls to report callback events that occur
*
* @author fredc
*/
private class GattCallback extends BluetoothGattCallback {
/** Callback invoked by Android framework and a LE connection state change occurs */
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
Log.d(
MainActivity.TAG,
"onConnectionStateChange(): address=="
+ gatt.getDevice().getAddress()
+ ", status = "
+ status
+ ", state="
+ newState);
boolean isConnected = (newState == BluetoothAdapter.STATE_CONNECTED);
boolean isOk = (status == 0);
if (isConnected && isOk) {
// Discover services, and return connection state = connected
// after services discovered
isOk = gatt.discoverServices();
if (isOk) {
return;
}
}
// If we got here, this is a disconnect with or without error
// close gatt connection
if (!isOk) {
gatt.close();
}
processConnectionStateChanged(false, !isOk);
}
/** Callback invoked by Android framework when LE service discovery completes */
@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
if (status != 0) {
// Error occurred. close the ocnnection and return a
// disconnected status
gatt.close();
try {
processConnectionStateChanged(false, true);
} catch (Throwable t) {
Log.e(TAG, "error", t);
}
} else {
try {
processConnectionStateChanged(true, false);
} catch (Throwable t) {
Log.e(TAG, "error", t);
}
}
}
/** Callback invoked by Android framework when a characteristic read completes */
@Override
public void onCharacteristicRead(
BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
if (status == 0) {
try {
processCharacteristicRead(characteristic);
} catch (Throwable t) {
Log.e(TAG, "error", t);
}
}
mRequestQueue.next(); // Execute the next queued request, if
// any
}
/** Callback invoked by Android framework when a descriptor read completes */
@Override
public void onDescriptorRead(
BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) {
if (status == 0) {
try {
processDescriptorRead(descriptor);
} catch (Throwable t) {
Log.e(TAG, "error", t);
}
}
mRequestQueue.next(); // Execute the next queued request, if
// any
}
/** Callback invoked by Android framework when a characteristic notification occurs */
@Override
public void onCharacteristicChanged(
BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) {
try {
processCharacteristicNotification(characteristic);
} catch (Throwable t) {
Log.e(TAG, "error", t);
}
}
/** Callback invoked by Android framework when a descriptor write completes */
@Override
public void onDescriptorWrite(
BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) {
if (status == 0) {
try {
processDescriptorWrite(descriptor);
} catch (Throwable t) {
Log.e(TAG, "error", t);
}
}
mRequestQueue.next(); // Execute the next queued request, if any
}
/** Callback invoked by Android framework when a characteristic write completes */
@Override
public void onCharacteristicWrite(
BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
super.onCharacteristicWrite(gatt, characteristic, status);
if (status == 0) {
try {
processCharacteristicWrite(characteristic);
} catch (Throwable t) {
Log.e(TAG, "error", t);
}
}
mRequestQueue.next(); // Execute the next queued request, if any
}
}
// UI Components
// Device picker components
private LinearLayout mButtonSelectDevice; // Button to start device picker
private DevicePickerFragment mDevicePicker;
private TextView mTextDeviceName; // Displays device's name
private TextView mTextDeviceAddress; // Displays device's address
// Connection components
private Button mButtonConnect; // Button to connect to a device
private Button mButtonDisconnect; // Button to connect from a device
private TextView mTextConnectionState; // Displays current connection state
// Hello service components
private TextView mLabelHelloInput;
private Spinner mSpinnerHelloInput;
private Button mButtonReadHelloInput;
private TextView mLabelHelloConfiguration;
private EditText mEditTextHelloConfiguration;
private Button mButtonReadHelloConfiguration;
private Button mButtonWriteHelloConfiguration;
// Device info service components
private TextView mTextManufacturerName; // Displays the manufacterer name
private TextView mTextModelNumber; // Displays the model number
private TextView mTextSystemId; // Displays the system id
private Button mButtonReadDeviceInfo; // Button to refresh the device
// information
// Battery service components
private TextView mTextBatteryLevel; // Displays the battery level
private Button mButtonReadBatteryInfo; // Button to refresh the device
// information
// Notification components
private TextView mTextAreaNotification; // Displays notifications
private Button mButtonClear; // Button to clear the notifications
private final GattCallback mGattCallback = new GattCallback();
private final RequestQueue mRequestQueue = GattUtils.createRequestQueue();
private BluetoothAdapter mBtAdapter;
private BluetoothDevice mPickedDevice;
private BluetoothGatt mPickedDeviceGatt;
private boolean mPickedDeviceIsConnected;
private boolean mSyncNotificationSetting;
/**
* Helper function to show a toast notification message
*
* @param msg
*/
private void showMessage(String msg) {
Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
}
/**
* Check Bluetooth is available and enabled, and initialize Bluetooth adapter
*
* @return
*/
private boolean checkAndInitBluetooth() {
mBtAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBtAdapter == null || !mBtAdapter.isEnabled()) {
return false;
}
return true;
}
/**
* Initialize the device picker
*
* @return
*/
private void initDevicePicker() {
mDevicePicker = DevicePickerFragment.createDialog(this, null, true);
}
/** Cleanup the device picker */
private void cleanupDevicePicker() {
if (mDevicePicker != null) {
mDevicePicker = null;
}
}
private void closeDevice() {
if (mPickedDeviceGatt != null) {
mPickedDeviceGatt.close();
mPickedDeviceGatt = null;
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Check bluetooth is available. If not, exit
if (!checkAndInitBluetooth()) {
showMessage(getString(R.string.error_bluetooth_not_available));
finish();
return;
}
// Initialize the UI components, and register a listeners
setContentView(R.layout.main);
// Load device picker components
mButtonSelectDevice = (LinearLayout) findViewById(R.id.btn_selectdevice);
mButtonSelectDevice.setOnClickListener(this);
mTextDeviceName = (TextView) findViewById(R.id.deviceName);
mTextDeviceAddress = (TextView) findViewById(R.id.deviceAddress);
// Load connection components
mButtonConnect = (Button) findViewById(R.id.btn_connect);
mButtonConnect.setOnClickListener(this);
mButtonDisconnect = (Button) findViewById(R.id.btn_disconnect);
mButtonDisconnect.setOnClickListener(this);
mTextConnectionState = (TextView) findViewById(R.id.connectionState);
// Load hello service components
mLabelHelloInput = (TextView) findViewById(R.id.label_hello_input);
mLabelHelloInput.setText(
getString(R.string.label_hello_input, Constants.HELLO_CHARACTERISTIC_INPUT_UUID));
mSpinnerHelloInput = (Spinner) findViewById(R.id.sp_hello_input);
mSpinnerHelloInput.setEnabled(false);
mButtonReadHelloInput = (Button) findViewById(R.id.btn_read_hello_input);
mButtonReadHelloInput.setOnClickListener(this);
mLabelHelloConfiguration = (TextView) findViewById(R.id.label_hello_configuration);
mLabelHelloConfiguration.setText(
getString(
R.string.label_hello_configuration, Constants.HELLO_CHARACTERISTIC_CONFIGURATION_UUID));
mEditTextHelloConfiguration = (EditText) findViewById(R.id.value_hello_configuration);
mButtonReadHelloConfiguration = (Button) findViewById(R.id.btn_read_hello_configuration);
mButtonReadHelloConfiguration.setOnClickListener(this);
mButtonWriteHelloConfiguration = (Button) findViewById(R.id.btn_write_hello_configuration);
mButtonWriteHelloConfiguration.setOnClickListener(this);
// Load device info components
mTextManufacturerName = (TextView) findViewById(R.id.value_manufacturer_name);
mTextModelNumber = (TextView) findViewById(R.id.value_model_number);
mTextSystemId = (TextView) findViewById(R.id.value_system_id);
mButtonReadDeviceInfo = (Button) findViewById(R.id.btn_read_device_info);
mButtonReadDeviceInfo.setOnClickListener(this);
// Load battery info components
mTextBatteryLevel = (TextView) findViewById(R.id.value_battery_lvel);
mButtonReadBatteryInfo = (Button) findViewById(R.id.btn_read_battery);
mButtonReadBatteryInfo.setOnClickListener(this);
// Load notification components
mTextAreaNotification = (TextView) findViewById(R.id.value_notifications);
mTextAreaNotification.setMovementMethod(ScrollingMovementMethod.getInstance());
mButtonClear = (Button) findViewById(R.id.btn_clear);
mButtonClear.setOnClickListener(this);
// Initialize the device picker UI fragment
initDevicePicker();
// refresh the UI component states
updateWidgets();
}
/** Updates the UI widgets based on the latest connection state */
private void updateWidgets() {
if (mPickedDevice == null) {
// No devices selected: set initial state
mButtonConnect.setEnabled(false);
mButtonDisconnect.setEnabled(false);
mButtonSelectDevice.setEnabled(true);
mTextDeviceName.setText(R.string.no_device);
mTextDeviceAddress.setText("");
} else {
// Device picked, always set the connect/disconnect buttons enabled
mButtonConnect.setEnabled(true);
mButtonDisconnect.setEnabled(true);
if (mPickedDeviceIsConnected) {
// Set resources when connected
// Disable selecting new device when connected
mButtonSelectDevice.setEnabled(false);
// Set the connection state status
mTextConnectionState.setText(getString(R.string.connected));
// Update hello service components
mSpinnerHelloInput.setEnabled(true);
mSpinnerHelloInput.setOnItemSelectedListener(this);
mButtonReadHelloInput.setEnabled(true);
mEditTextHelloConfiguration.setEnabled(true);
mButtonReadHelloConfiguration.setEnabled(true);
mButtonWriteHelloConfiguration.setEnabled(true);
// Update device info components
mButtonReadDeviceInfo.setEnabled(true);
// Update battery components
mButtonReadBatteryInfo.setEnabled(true);
// Update notification components
mTextAreaNotification.setEnabled(true);
mButtonClear.setEnabled(true);
} else {
// Update resources when disconnected
// Enable selecting new device when connected
mButtonSelectDevice.setEnabled(true);
// Set the connection state status
mTextConnectionState.setText(getString(R.string.disconnected));
// Update hello service components
mSpinnerHelloInput.setEnabled(false);
mSpinnerHelloInput.setOnItemSelectedListener(null);
mSpinnerHelloInput.setSelection(0);
mButtonReadHelloInput.setEnabled(false);
mEditTextHelloConfiguration.setEnabled(false);
mEditTextHelloConfiguration.setText("");
mButtonReadHelloConfiguration.setEnabled(false);
mButtonWriteHelloConfiguration.setEnabled(false);
// Update device info components
mButtonReadDeviceInfo.setEnabled(false);
mTextManufacturerName.setText(R.string.no_value);
mTextModelNumber.setText(R.string.no_value);
mTextSystemId.setText(R.string.no_value);
// Update battery components
mButtonReadBatteryInfo.setEnabled(false);
mTextBatteryLevel.setText(R.string.no_value);
// Update notification components
mTextAreaNotification.setEnabled(false);
mTextAreaNotification.setText("");
mButtonClear.setEnabled(false);
}
}
}
@Override
public void onDestroy() {
closeDevice();
cleanupDevicePicker();
super.onDestroy();
}
/** Callback invoked when buttons/switches clicked */
@Override
public void onClick(View v) {
if (v == mButtonSelectDevice) {
// Start the device selector
mDevicePicker.show(getFragmentManager(), FRAGMENT_DEVICE_PICKER);
} else if (v == mButtonConnect) {
// Start device connection
connect();
} else if (v == mButtonDisconnect) {
// Start device disconnect
disconnect();
} else if (v == mButtonReadDeviceInfo) {
// Start reading the device information characteristics
readDeviceInfoCharacteristics();
} else if (v == mButtonReadBatteryInfo) {
// Start reading the battery characteristics
readBatteryCharacteristic();
} else if (v == mButtonReadHelloConfiguration) {
// Start reading the hello configuration characteristics
} else if (v == mButtonWriteHelloConfiguration) {
// Start writing the hello configuration characteristics
writeHelloConfigurationCharacteristic();
} else if (v == mButtonReadHelloInput) {
// Start reading hello input descriptors
readHelloInputCharacteristic();
} else if (v == mButtonClear) {
// Clear the notification area
mTextAreaNotification.setText("");
}
}
/**
* Called when the hello input is selected by user
*
* @param view
* @param view2
* @param pos
* @param id
*/
@Override
public void onItemSelected(AdapterView<?> view, View view2, int pos, long id) {
if (view == mSpinnerHelloInput) {
// Update the input characteristic on the device
writeHelloInputCharacteristic();
}
}
/** Called when no hello input is selected */
@Override
public void onNothingSelected(AdapterView<?> view) {}
/**
* Callback invoked when a device was picked from the device picker
*
* @param device
*/
@Override
public void onDevicePicked(BluetoothDevice device) {
Log.d(TAG, "onDevicePicked: " + device == null ? "" : device.getAddress());
// Close any outstanding connections to remote devices
closeDevice();
// Get the remote device object
String address = device.getAddress();
mPickedDevice = mBtAdapter.getRemoteDevice(address);
// Get the name
String name = mPickedDevice.getName();
if (name == null || name.isEmpty()) {
name = address;
}
// Set UI resources
mTextDeviceName.setText(name);
mTextDeviceAddress.setText(address);
// Update the connect widget
mButtonConnect.setEnabled(true);
mButtonDisconnect.setEnabled(true);
}
/** Callback invoked when a devicepicker was dismissed without a device picked */
@Override
public void onDevicePickError() {
Log.d(TAG, "onDevicePickError");
}
/** Callback invoked when a devicepicker encountered an unexpected error */
@Override
public void onDevicePickCancelled() {
Log.d(TAG, "onDevicePickCancelled");
}
/** Connect to the picked device */
private void connect() {
if (mPickedDevice == null) {
showMessage(
getString(R.string.error_connect, mPickedDevice.getName(), mPickedDevice.getAddress()));
return;
}
mPickedDeviceGatt = mPickedDevice.connectGatt(this, false, mGattCallback);
if (mPickedDeviceGatt == null) {
showMessage(
getString(R.string.error_connect, mPickedDevice.getName(), mPickedDevice.getAddress()));
}
}
/** Disconnects the picked device */
private void disconnect() {
if (mPickedDeviceGatt != null) {
mPickedDeviceGatt.disconnect();
closeDevice();
}
}
/**
* Called when a gatt connection state changes. This function updates the UI
*
* @param gatt
*/
private void processConnectionStateChanged(final boolean isConnected, final boolean hasError) {
runOnUiThread(
new Runnable() {
@Override
public void run() {
if (hasError) {
showMessage(
getString(
R.string.error_connect, mPickedDevice.getName(), mPickedDevice.getAddress()));
}
mPickedDeviceIsConnected = isConnected;
updateWidgets();
// Refresh the device information
if (mPickedDeviceIsConnected) {
mSyncNotificationSetting = true;
readEverything();
}
}
});
}
/** Reads the device info characteristics and updates the UI components */
private void readDeviceInfoCharacteristics() {
// Get all readable characteristics and descriptors of interest and add
// request to a request queue
BluetoothGattCharacteristic characteristic = null;
// Get model number
characteristic =
GattUtils.getCharacteristic(
mPickedDeviceGatt, Constants.DEVICE_INFO_SERVICE_UUID, Constants.MODEL_NUMBER_UUID);
mRequestQueue.addReadCharacteristic(mPickedDeviceGatt, characteristic);
// Get manufacturer name
characteristic =
GattUtils.getCharacteristic(
mPickedDeviceGatt,
Constants.DEVICE_INFO_SERVICE_UUID,
Constants.MANUFACTURER_NAME_UUID);
mRequestQueue.addReadCharacteristic(mPickedDeviceGatt, characteristic);
// Get system Id
characteristic =
GattUtils.getCharacteristic(
mPickedDeviceGatt, Constants.DEVICE_INFO_SERVICE_UUID, Constants.SYSTEM_ID_UUID);
mRequestQueue.addReadCharacteristic(mPickedDeviceGatt, characteristic);
mRequestQueue.execute();
}
/** Reads the battery characteristics and updates the UI components */
private void readBatteryCharacteristic() {
// Get all readable characteristics and descriptors of interest and add
// request to a request queue
BluetoothGattCharacteristic characteristic = null;
// Get battery level
characteristic =
GattUtils.getCharacteristic(
mPickedDeviceGatt, Constants.BATTERY_SERVICE_UUID, Constants.BATTERY_LEVEL_UUID);
mRequestQueue.addReadCharacteristic(mPickedDeviceGatt, characteristic);
mRequestQueue.execute();
}
/** Reads the hello input characteristic and updates the UI components */
private void readHelloInputCharacteristic() {
// Get all readable characteristics and descriptors of interest and add
// request to a request queue
BluetoothGattDescriptor descriptor = null;
// Get client config descriptor: enable/disable notification
descriptor =
GattUtils.getDescriptor(
mPickedDeviceGatt,
Constants.HELLO_SERVICE_UUID,
Constants.HELLO_CHARACTERISTIC_INPUT_UUID,
Constants.CLIENT_CONFIG_DESCRIPTOR_UUID);
mRequestQueue.addReadDescriptor(mPickedDeviceGatt, descriptor);
mRequestQueue.execute();
}
/**
* Reads the manufacturer name, model number, system id, battery level from the device and updates
* the UI
*/
private void readHelloConfigurationCharacteristic() {
BluetoothGattCharacteristic characteristic = null;
characteristic =
GattUtils.getCharacteristic(
mPickedDeviceGatt,
Constants.HELLO_SERVICE_UUID,
Constants.HELLO_CHARACTERISTIC_CONFIGURATION_UUID);
mRequestQueue.addReadCharacteristic(mPickedDeviceGatt, characteristic);
mRequestQueue.execute();
}
/** Read every characteristic on the device */
private void readEverything() {
readDeviceInfoCharacteristics();
readBatteryCharacteristic();
readHelloConfigurationCharacteristic();
readHelloInputCharacteristic();
}
/** Write the hello configuration characteristic to the device */
private void writeHelloConfigurationCharacteristic() {
BluetoothGattCharacteristic characteristic = null;
int blinks = 0;
try {
blinks = Integer.parseInt(mEditTextHelloConfiguration.getText().toString());
characteristic =
GattUtils.getCharacteristic(
mPickedDeviceGatt,
Constants.HELLO_SERVICE_UUID,
Constants.HELLO_CHARACTERISTIC_CONFIGURATION_UUID);
characteristic.setValue(blinks, BluetoothGattCharacteristic.FORMAT_UINT8, 0);
mRequestQueue.addWriteCharacteristic(mPickedDeviceGatt, characteristic);
} catch (Throwable t) {
Log.w(TAG, "invalid number of notifications");
mEditTextHelloConfiguration.setText("0");
}
mRequestQueue.addWriteCharacteristic(mPickedDeviceGatt, characteristic);
mRequestQueue.execute();
}
/** Write the hello input descriptor to the device */
private void writeHelloInputCharacteristic() {
// Set the enable/disable notification settings
BluetoothGattCharacteristic notifyCharacteristic =
GattUtils.getCharacteristic(
mPickedDeviceGatt,
Constants.HELLO_SERVICE_UUID,
Constants.HELLO_CHARACTERISTIC_INPUT_UUID);
int notificationState = mSpinnerHelloInput.getSelectedItemPosition();
if (notificationState >= 0 && notificationState <= 2) {
BluetoothGattDescriptor descriptor =
GattUtils.getDescriptor(
mPickedDeviceGatt,
Constants.HELLO_SERVICE_UUID,
Constants.HELLO_CHARACTERISTIC_INPUT_UUID,
Constants.CLIENT_CONFIG_DESCRIPTOR_UUID);
if (notificationState > 0) {
mPickedDeviceGatt.setCharacteristicNotification(notifyCharacteristic, true);
if (notificationState == 1) {
descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
} else if (notificationState == 2) {
descriptor.setValue(BluetoothGattDescriptor.ENABLE_INDICATION_VALUE);
}
} else {
mPickedDeviceGatt.setCharacteristicNotification(notifyCharacteristic, false);
descriptor.setValue(BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE);
}
mRequestQueue.addWriteDescriptor(mPickedDeviceGatt, descriptor);
mRequestQueue.execute();
}
}
/**
* Callback invoked by the Android framework when a read characteristic successfully completes
*
* @param characteristic
*/
private void processCharacteristicRead(final BluetoothGattCharacteristic characteristic) {
runOnUiThread(
new Runnable() {
@Override
public void run() {
UUID uuid = characteristic.getUuid();
if (Constants.MANUFACTURER_NAME_UUID.equals(uuid)) {
mTextManufacturerName.setText(characteristic.getStringValue(0));
} else if (Constants.MODEL_NUMBER_UUID.equals(uuid)) {
mTextModelNumber.setText(characteristic.getStringValue(0));
} else if (Constants.SYSTEM_ID_UUID.equals(uuid)) {
byte[] systemIdBytes = characteristic.getValue();
long systemIdLong = GattUtils.unsignedBytesToLong(systemIdBytes, 8, 0);
long manuId = 0xFFFFFFFFFFL & systemIdLong; // 40bits
long orgId = 0xFFFFFFL & (systemIdLong >> 40);
String manuIdString = String.format("%010X", manuId);
String orgIdString = String.format("%06X", orgId);
mTextSystemId.setText(orgIdString + " " + manuIdString);
} else if (Constants.BATTERY_LEVEL_UUID.equals(uuid)) {
int batteryLevel =
characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, 0);
mTextBatteryLevel.setText(String.valueOf(batteryLevel));
} else if (Constants.HELLO_CHARACTERISTIC_CONFIGURATION_UUID.equals(uuid)) {
int blinks = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, 0);
mEditTextHelloConfiguration.setText(String.valueOf(blinks));
}
}
});
}
/**
* Callback invoked by the Android framework when a read descriptor successfully completes
*
* @param descriptor
*/
private void processDescriptorRead(final BluetoothGattDescriptor descriptor) {
runOnUiThread(
new Runnable() {
@Override
public void run() {
UUID uuid = descriptor.getUuid();
if (Constants.CLIENT_CONFIG_DESCRIPTOR_UUID.equals(uuid)) {
byte[] descriptorBytes = descriptor.getValue();
int notificationState = (int) GattUtils.unsignedBytesToLong(descriptorBytes, 2, 0);
Log.d(TAG, "notificationState = " + notificationState);
if (notificationState >= 0 && notificationState <= 2) {
// Temporarily disable the spinner listener when we set
// the selection
mSpinnerHelloInput.setOnItemSelectedListener(null);
mSpinnerHelloInput.setSelection(notificationState);
// Re-enable the spinner listener
mSpinnerHelloInput.setOnItemSelectedListener(MainActivity.this);
}
if (mSyncNotificationSetting && notificationState > 0) {
// On initial connection, mSyncNotificationSetting is
// set to indicate that we should set characteristic
// notification if the descriptor is set
mSyncNotificationSetting = false;
BluetoothGattCharacteristic notifyCharacteristic =
GattUtils.getCharacteristic(
mPickedDeviceGatt,
Constants.HELLO_SERVICE_UUID,
Constants.HELLO_CHARACTERISTIC_INPUT_UUID);
mPickedDeviceGatt.setCharacteristicNotification(notifyCharacteristic, true);
}
}
}
});
}
/**
* Callback invoked by the Android framework when a write descriptor successfully completes
*
* @param descriptor
*/
private void processDescriptorWrite(final BluetoothGattDescriptor descriptor) {
runOnUiThread(
new Runnable() {
@Override
public void run() {
readEverything();
}
});
}
/**
* Callback invoked by the Android framework when a write characteristic successfully completes
*
* @param characteristic
*/
private void processCharacteristicWrite(final BluetoothGattCharacteristic characteristic) {
runOnUiThread(
new Runnable() {
@Override
public void run() {
readEverything();
}
});
}
/**
* Callback invoked by the Android framework when a characteristic notification is received
*
* @param characteristic
*/
private void processCharacteristicNotification(final BluetoothGattCharacteristic characteristic) {
runOnUiThread(
new Runnable() {
@Override
public void run() {
String s = characteristic.getStringValue(0);
// Write a entry to the log viewer: "timestamp value"
mTextAreaNotification.append(mFormatter.format(Calendar.getInstance().getTime()));
mTextAreaNotification.append(" ");
mTextAreaNotification.append(s);
mTextAreaNotification.append("\n");
// Auto scroll to the bottom
Layout l = mTextAreaNotification.getLayout();
if (l != null) {
int scrollAmount =
l.getLineTop(mTextAreaNotification.getLineCount())
- mTextAreaNotification.getHeight();
// if there is no need to scroll, scrollAmount will be <=0
if (scrollAmount > 0) mTextAreaNotification.scrollTo(0, scrollAmount);
else mTextAreaNotification.scrollTo(0, 0);
}
}
});
}
}