2019獨角獸企業重金招聘Python工程師標準>>>

android4.4以后支持藍牙4.0BLE，android5.0以后支持作為BLE外部設備peripheral，android5.0之前的版本只能作為BLE的中心設備central。

android的例子BluetoothAdvertisements，可以作為外設被發現，但沒有提供服務，和收發數據。

下面的代碼提供了服務，可以被中心設備發現，和收發數據。

import java.util.UUID; import android.app.Notification; import android.app.Service; import android.bluetooth.BluetoothDevice; import android.bluetooth.BluetoothGatt; import android.bluetooth.BluetoothGattCharacteristic; import android.bluetooth.BluetoothGattDescriptor; import android.bluetooth.BluetoothGattServer; import android.bluetooth.BluetoothGattServerCallback; import android.bluetooth.BluetoothGattService; import android.bluetooth.BluetoothManager; import android.bluetooth.BluetoothProfile; import android.bluetooth.le.AdvertiseCallback; import android.bluetooth.le.AdvertiseData; import android.bluetooth.le.AdvertiseSettings; import android.bluetooth.le.BluetoothLeAdvertiser; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.Handler; import android.os.IBinder; import android.util.Log;public class GattServerService extends Service {private static final String TAG = GattServerService.class.getSimpleName();public static final String START_ADVERTISING = "GattServerService.start.advertising";public static final String ADVERTISING_STATE = "GattServerService.advertising.state";public static final String ADVERTISING_ON = "on";public static final String ADVERTISING_OFF = "off";public static final String BLE_CMD = "GattServerService.ble.cmd";public static final String LOCAL_CMD = "GattServerService.local.cmd";private static final String BLE_ERROR = "ble_error";public static final int MAX_SENDED_VALUE_LEN = 255;private static final long ADVERTISING_TIME = 60 * 1000;private static final UUID CMD_UUID = UUID.fromString("0000b81d-0000-1000-8000-00805f9b34fb");private BluetoothLeAdvertiser mBluetoothLeAdvertiser;private BluetoothGattServer mBluetoothGattServer;private AdvertiseCallback mAdvertiseCallback;private Handler mHandler = new Handler();private Runnable mStopAdvertisingRunnable;private BluetoothDevice mConnectedDevice;private BluetoothGattCharacteristic mCmdCharacteristic;@Overridepublic IBinder onBind(Intent intent) {return null;}@Overridepublic void onCreate() {Log.d(TAG, "onCreate");super.onCreate();startForeground(0, new Notification());initBluetooth();final IntentFilter intentFilter = new IntentFilter();intentFilter.addAction(START_ADVERTISING);intentFilter.addAction(LOCAL_CMD);registerReceiver(mBroadcastReceiver, intentFilter);}@Overridepublic int onStartCommand(Intent intent, int flags, int startId) {Log.d(TAG, "onStartCommand");return super.onStartCommand(intent, flags, startId);}@Overridepublic void onDestroy() {Log.d(TAG, "onDestroy");super.onDestroy();stopAdvertising();mBluetoothLeAdvertiser = null;if (mBluetoothGattServer != null) {if (mConnectedDevice != null) {mBluetoothGattServer.cancelConnection(mConnectedDevice);mConnectedDevice = null;}mBluetoothGattServer.close();mBluetoothGattServer = null;}}private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent) {final String action = intent.getAction();if (START_ADVERTISING.equals(action)) {startAdvertising();} else if (LOCAL_CMD.equals(action)) {byte[] value = intent.getByteArrayExtra(LOCAL_CMD);onLocalCmdReceived(value);}}};private void startAdvertising() {Log.d(TAG, "startAdvertising");if (mAdvertiseCallback == null && mBluetoothLeAdvertiser != null) {mAdvertiseCallback = new AdvertiseCallback() {@Overridepublic void onStartSuccess(AdvertiseSettings settingsInEffect) {super.onStartSuccess(settingsInEffect);Log.d(TAG, "AdvertiseCallback.onStartSuccess");if (mStopAdvertisingRunnable != null) {mHandler.removeCallbacks(mStopAdvertisingRunnable);mStopAdvertisingRunnable = null;}mStopAdvertisingRunnable = new Runnable() {@Overridepublic void run() {mStopAdvertisingRunnable = null;stopAdvertising();}};mHandler.postDelayed(mStopAdvertisingRunnable,ADVERTISING_TIME);onAdvertisingStateChanged();}@Overridepublic void onStartFailure(int errorCode) {super.onStartFailure(errorCode);Log.d(TAG, "AdvertiseCallback.onStartFailure");mAdvertiseCallback = null;onAdvertisingStateChanged();}};AdvertiseSettings.Builder settingsBuilder = new AdvertiseSettings.Builder();settingsBuilder.setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_LOW_POWER);settingsBuilder.setTimeout(0);AdvertiseSettings advertiseSettings = settingsBuilder.build();AdvertiseData.Builder dataBuilder = new AdvertiseData.Builder();// dataBuilder.addServiceUuid(Constants.Service_UUID);dataBuilder.setIncludeDeviceName(true);AdvertiseData advertiseData = dataBuilder.build();mBluetoothLeAdvertiser.startAdvertising(advertiseSettings,advertiseData, mAdvertiseCallback);}}private void stopAdvertising() {Log.d(TAG, "stopAdvertising");if (mStopAdvertisingRunnable != null) {mHandler.removeCallbacks(mStopAdvertisingRunnable);mStopAdvertisingRunnable = null;}if (mAdvertiseCallback != null) {if (mBluetoothLeAdvertiser != null) {mBluetoothLeAdvertiser.stopAdvertising(mAdvertiseCallback);}mAdvertiseCallback = null;onAdvertisingStateChanged();}}private void initBluetooth() {BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);if (mBluetoothLeAdvertiser == null) {mBluetoothLeAdvertiser = bluetoothManager.getAdapter().getBluetoothLeAdvertiser();}if (mBluetoothGattServer == null) {mBluetoothGattServer = bluetoothManager.openGattServer(GattServerService.this, mBluetoothGattServerCallback);BluetoothGattService gattService = new BluetoothGattService(CMD_UUID, BluetoothGattService.SERVICE_TYPE_PRIMARY);BluetoothGattCharacteristic gattCharacteristic = new BluetoothGattCharacteristic(CMD_UUID, BluetoothGattCharacteristic.PROPERTY_READ| BluetoothGattCharacteristic.PROPERTY_WRITE| BluetoothGattCharacteristic.PROPERTY_NOTIFY,BluetoothGattCharacteristic.PERMISSION_READ| BluetoothGattCharacteristic.PERMISSION_WRITE);gattCharacteristic.setValue("");gattService.addCharacteristic(gattCharacteristic);mBluetoothGattServer.addService(gattService);}}private void notifyCmdCharacteristicChanged(byte[] value) {Log.d(TAG, "notifyCmdCharacteristicChanged: ");if (mBluetoothGattServer != null && mConnectedDevice != null&& mCmdCharacteristic != null && value != null&& value.length < MAX_SENDED_VALUE_LEN) {dumpBytes(value);mCmdCharacteristic.setValue(value);boolean rst = mBluetoothGattServer.notifyCharacteristicChanged(mConnectedDevice, mCmdCharacteristic, true);if (!rst) {try {throw new Exception(BLE_ERROR);} catch (Exception e) {e.printStackTrace();}}}}private BluetoothGattServerCallback mBluetoothGattServerCallback = new BluetoothGattServerCallback() {private byte[] cmdBuffer = null;@Overridepublic void onConnectionStateChange(BluetoothDevice device, int status,int newState) {super.onConnectionStateChange(device, status, newState);Log.d(TAG, "onConnectionStateChange: status=" + status+ ", newState=" + newState);if (newState == BluetoothProfile.STATE_CONNECTED) {mConnectedDevice = device;stopAdvertising();} else {mConnectedDevice = null;}}@Overridepublic void onServiceAdded(int status, BluetoothGattService service) {super.onServiceAdded(status, service);Log.d(TAG, "onServiceAdded: status=" + status);if (status == BluetoothGatt.GATT_SUCCESS) {mCmdCharacteristic = service.getCharacteristic(CMD_UUID);}}@Overridepublic void onCharacteristicReadRequest(BluetoothDevice device,int requestId, int offset,BluetoothGattCharacteristic characteristic) {super.onCharacteristicReadRequest(device, requestId, offset,characteristic);Log.d(TAG, "onCharacteristicReadRequest: requestId=" + requestId+ ", offset=" + offset);byte[] value = characteristic.getValue();dumpBytes(value);if (mBluetoothGattServer != null) {mBluetoothGattServer.sendResponse(device, requestId,BluetoothGatt.GATT_SUCCESS, offset, new byte[] { 0 });}}@Overridepublic void onCharacteristicWriteRequest(BluetoothDevice device,int requestId, BluetoothGattCharacteristic characteristic,boolean preparedWrite, boolean responseNeeded, int offset,byte[] value) {super.onCharacteristicWriteRequest(device, requestId,characteristic, preparedWrite, responseNeeded, offset,value);Log.d(TAG, "onCharacteristicWriteRequest: requestId=" + requestId+ ", offset=" + offset + ", preparedWrite=" + preparedWrite+ ", responseNeeded=" + responseNeeded);dumpBytes(value);if (value != null && value.length > 0) {if (preparedWrite) {if (cmdBuffer == null) {cmdBuffer = value;} else {byte[] tmp = new byte[cmdBuffer.length + value.length];System.arraycopy(cmdBuffer, 0, tmp, 0, cmdBuffer.length);System.arraycopy(value, 0, tmp, cmdBuffer.length,value.length);cmdBuffer = tmp;}} else {cmdBuffer = null;onBleCmdReceived(value);}}if (mBluetoothGattServer != null) {mBluetoothGattServer.sendResponse(device, requestId,BluetoothGatt.GATT_SUCCESS, offset, value);}}@Overridepublic void onDescriptorReadRequest(BluetoothDevice device,int requestId, int offset, BluetoothGattDescriptor descriptor) {super.onDescriptorReadRequest(device, requestId, offset, descriptor);Log.d(TAG, "onDescriptorReadRequest: requestId=" + requestId+ ", offset=" + offset);}@Overridepublic void onDescriptorWriteRequest(BluetoothDevice device,int requestId, BluetoothGattDescriptor descriptor,boolean preparedWrite, boolean responseNeeded, int offset,byte[] value) {super.onDescriptorReadRequest(device, requestId, offset, descriptor);Log.d(TAG, "onDescriptorWriteRequest: requestId=" + requestId+ ", offset=" + offset);}@Overridepublic void onExecuteWrite(BluetoothDevice device, int requestId,boolean execute) {super.onExecuteWrite(device, requestId, execute);Log.d(TAG, "onExecuteWrite: requestId=" + requestId + ", execute="+ execute);onBleCmdReceived(cmdBuffer);cmdBuffer = null;if (mBluetoothGattServer != null) {mBluetoothGattServer.sendResponse(device, requestId,BluetoothGatt.GATT_SUCCESS, 0, null);}}@Overridepublic void onNotificationSent(BluetoothDevice device, int status) {super.onNotificationSent(device, status);Log.d(TAG, "onNotificationSent: status=" + status);}@Overridepublic void onMtuChanged(BluetoothDevice device, int mtu) {super.onMtuChanged(device, mtu);Log.d(TAG, "onMtuChanged: mtu=" + mtu);}};private void onAdvertisingStateChanged() {Intent intent = new Intent(ADVERTISING_STATE);String state = mAdvertiseCallback != null ? ADVERTISING_ON: ADVERTISING_OFF;intent.putExtra(ADVERTISING_STATE, state);sendBroadcast(intent);Log.d(TAG, "onAdvertisingStateChanged:" + state);}private void onLocalCmdReceived(byte[] value) {notifyCmdCharacteristicChanged(value);}private void onBleCmdReceived(byte[] value) {Intent intent = new Intent(BLE_CMD);intent.putExtra(BLE_CMD, value);sendBroadcast(intent);Log.d(TAG, "onBleCmdReceived: ");dumpBytes(value);}private void dumpBytes(byte[] value) {if (value != null && value.length > 0) {StringBuilder sb = new StringBuilder(2 * value.length);for (byte b : value) {sb.append(Byte.toHexString(b, true));}Log.d(TAG, sb.toString());}Log.d(TAG, "empty value");} }

下面的代碼參照android的例子BluetoothLeGatt，和BLE外設收發數據

package com.example.android.bluetoothlegatt;import java.util.UUID;import android.app.Notification; import android.app.Service; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.bluetooth.BluetoothGatt; import android.bluetooth.BluetoothGattCallback; import android.bluetooth.BluetoothGattCharacteristic; import android.bluetooth.BluetoothGattService; import android.bluetooth.BluetoothManager; import android.bluetooth.BluetoothProfile; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.IBinder; import android.text.TextUtils; import android.util.Log;public class GattClientService extends Service {private static final String TAG = GattClientService.class.getSimpleName();private static final UUID CMD_UUID = UUID.fromString("0000b81d-0000-1000-8000-00805f9b34fb");public static final String GATT_CONNECT = "com.example.android.bluetoothlegatt.connect";public static final String GATT_CONNECT_ON = "on";public static final String GATT_CONNECT_OFF = "off";public static final String GATT_CONNECT_ADDR = "com.example.android.bluetoothlegatt.connect.addr";public static final String CONNECT_STATE = "com.example.android.bluetoothlegatt.connect.state";public static final String CMD_LOCAL = "com.example.android.bluetoothlegatt.cmd.local";public static final String CMD_BLE = "com.example.android.bluetoothlegatt.cmd.ble";public static final int STATE_DISCONNECTED = 0;public static final int STATE_CONNECTED = 1;private BluetoothAdapter mBluetoothAdapter;private BluetoothGatt mBluetoothGatt;private BluetoothGattCharacteristic mCmdGattCharacteristic;private String mBleAddr;private int mConnectionState = STATE_DISCONNECTED;private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {@Overridepublic void onConnectionStateChange(BluetoothGatt gatt, int status,int newState) {if (newState == BluetoothProfile.STATE_CONNECTED) {mConnectionState = STATE_CONNECTED;mBluetoothGatt.discoverServices();} else {mConnectionState = STATE_DISCONNECTED;}onBleConnectionStateChange(mConnectionState);}@Overridepublic void onServicesDiscovered(BluetoothGatt gatt, int status) {if (status == BluetoothGatt.GATT_SUCCESS) {BluetoothGattService service = gatt.getService(CMD_UUID);if (service != null) {mCmdGattCharacteristic = service.getCharacteristic(CMD_UUID);if (mCmdGattCharacteristic != null) {mBluetoothGatt.setCharacteristicNotification(mCmdGattCharacteristic, true);}}}}@Overridepublic void onCharacteristicChanged(BluetoothGatt gatt,BluetoothGattCharacteristic characteristic) {Log.d(TAG, "onCharacteristicChanged");byte[] value = characteristic.getValue();onValueReaded(value);}};private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent) {final String action = intent.getAction();if (GATT_CONNECT.equals(action)) {String on = intent.getStringExtra(GATT_CONNECT);String addr = intent.getStringExtra(GATT_CONNECT_ADDR);if (GATT_CONNECT_ON.equals(on)) {connect(addr);} else {disconnect();}} else if (CMD_LOCAL.equals(action)) {byte[] value = intent.getByteArrayExtra(CMD_LOCAL);writeValue(value);}}};@Overridepublic IBinder onBind(Intent intent) {return null;}@Overridepublic void onCreate() {super.onCreate();startForeground(0, new Notification());BluetoothManager mBluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);mBluetoothAdapter = mBluetoothManager.getAdapter();final IntentFilter intentFilter = new IntentFilter();intentFilter.addAction(GATT_CONNECT);intentFilter.addAction(CMD_LOCAL);registerReceiver(mBroadcastReceiver, intentFilter);}private boolean connect(String address) {if (TextUtils.isEmpty(address)) {return false;}if (address.equals(mBleAddr) && mBluetoothGatt != null&& mConnectionState == STATE_CONNECTED) {return true;} else if (address.equals(mBleAddr) && mBluetoothGatt != null) {return mBluetoothGatt.connect();} else if (mBluetoothGatt != null) {mBluetoothGatt.close();mBluetoothGatt = null;mBleAddr = null;}final BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);if (device == null) {return false;}mBluetoothGatt = device.connectGatt(this, false, mGattCallback);if (mBluetoothGatt == null) {return false;}mBleAddr = address;return true;}private void disconnect() {if (mBluetoothGatt != null) {mBluetoothGatt.disconnect();}}private void onBleConnectionStateChange(int state) {final Intent intent = new Intent(CONNECT_STATE);intent.putExtra(CONNECT_STATE, state);sendBroadcast(intent);}private void writeValue(byte[] value) {Log.d(TAG, "writeValue");dumpBytes(value);if (mCmdGattCharacteristic != null && mBluetoothGatt != null&& mConnectionState == STATE_CONNECTED) {mCmdGattCharacteristic.setValue(value);mBluetoothGatt.writeCharacteristic(mCmdGattCharacteristic);}}private void onValueReaded(byte[] value) {Log.d(TAG, "onValueReaded");dumpBytes(value);final Intent intent = new Intent(CMD_BLE);intent.putExtra(CMD_BLE, value);sendBroadcast(intent);}private void dumpBytes(byte[] value) {if (value != null && value.length > 0) {StringBuilder sb = new StringBuilder(2 * value.length);for (byte b : value) {sb.append(Byte.toHexString(b, true));}Log.d(TAG, sb.toString());return;}Log.d(TAG, "empty value");} }

?

轉載于:https://my.oschina.net/kyle960/blog/847638

總結

以上是生活随笔為你收集整理的android蓝牙4.0BLE的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。