藍牙Android 4.0低耗開發兼容穩定性問題解決方式

可以在 www.IOTSDK.com  下載一個SDK，解決~！

android4.2以上藍牙開發穩定兼容Samsung BLE SDK、Broadcom BLE SDK、Google BLE SDK 

1. 拷貝依賴庫

將如下 jar 包拷貝到 libs 目錄下：

• blelibrary-0.1.jar
• com.broadcom.bt.jar
• commons-codec-1.8.jar
• samsung_ble_sdk_200.jar
</ul>

2. 添加權限

在 AndroidManifest.xml 中添加如下權限

<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />

3. 添加 Service

在 AndroidManifest.xml 中添加如 Service

<application>
    ...
    <service
        android:name="com.xtremeprog.sdk.ble.BleService"
        android:enabled="true" />
    ...
</application>

4. 綁定 BLE service 并接收廣播

在需要使用 BLE 通訊的 Activity 中（或者寫在 Application 中），添加 bind service 的代碼：

    protected BleService mService;
    protected IBle mBle;

    ...

    private final BroadcastReceiver mBleReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                    Bundle extras = intent.getExtras();
                    String action = intent.getAction();

                    // 4. 處理 service 發過來的廣播

                    // 發現設備
                    if (BleService.BLE_DEVICE_FOUND.equals(action)) {
                            BluetoothDevice device = extras
                                            .getParcelable(BleService.EXTRA_DEVICE);
                            byte[] scanRecord = extras
                                            .getByteArray(BleService.EXTRA_SCAN_RECORD);
                            return;
                    }

                    // 設備已連接
                    if (BleService.BLE_GATT_CONNECTED.equals(action)) {
                            BluetoothDevice device = extras
                                            .getParcelable(BleService.EXTRA_DEVICE);
                            return;
                    }

                    // 發現設備服務
                    if (BleService.BLE_SERVICE_DISCOVERED.equals(action)) {
                            String address = extras
                                            .getParcelable(BleService.EXTRA_ADDR);
                            ArrayList<BleGattService> services = mBle.getServices(address);
                            return;
                    }                             
            }
    };

    private final ServiceConnection mServiceConnection = new ServiceConnection() {
            @Override
            public void onServiceConnected(ComponentName className,
                            IBinder rawBinder) {
                    // 1. 綁定 service 成功，獲取 mBle 對象
                    mService = ((BleService.LocalBinder) rawBinder).getService();
                    mBle = mService.getBle();
            }

            @Override
            public void onServiceDisconnected(ComponentName classname) {
                    mService = null;
                    mBle = null;
            }
    };


    @Override
    public void onCreate(Bundle savedInstanceState) {

            ...

            // 0. 綁定 service
            Intent bindIntent = new Intent(this, BleService.class);
            bindService(bindIntent, mServiceConnection, Context.BIND_AUTO_CREATE);
    }


    @Override
    protected void onResume() {
            super.onResume();
            // 3. 接受 service 發送的廣播
            registerReceiver(mBleReceiver, BleService.getIntentFilter());
    }

    @Override
    protected void onPause() {
            super.onPause();
            // 5. 停止接收廣播
            unregisterReceiver(mBleReceiver);
    }

5. BLE 操作

所有 BLE 的操作都通過調用 IBle 對象的 requestXXX 來實現，調用的結果在廣播中返回,

    // 請求連接
    mBle.requestConnect(address);

    // 讀取 characteristic
    List<BleGattCharacteristic> gattCharacteristics = gattService.getCharacteristics();
    mBle.requestReadCharacteristic(address, gattCharacteristics.get(1));

    // 寫入 characteristic
    public static final UUID CHARACTER_COMMON_WRITE = UUID
        .fromString("00008a81-0000-1000-8000-00805f9b34fb");
    BleGattCharacteristic characteristic = deviceSerivce
            .getCharacteristic(CHARACTER_COMMON_WRITE); 
    characteristic.setValue(new byte[] {0x00});
    mBle.requestWriteCharacteristic(address, characteristic, "");

    // 接收 notification
    mBle.requestCharacteristicNotification(address, characteristic)