• 【android 蓝牙开发——蓝牙耳机】

    【android 蓝牙开发——传统蓝牙】

    【android 蓝牙开发——BLE（低功耗）蓝牙 2021-10-09更新】

    总结一下蓝牙开发的基本使用以及蓝牙耳机的断开和链接。

    所以需权限：

      
    
    
    
     
     
     
    

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    注意这里需要位置权限。

    开启权限：

     ActivityResultLauncher bluetoothOpenLaunch;

    private void startBluetooth() {
        bluetoothOpenLaunch = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), new ActivityResultCallback() {
            @Override
            public void onActivityResult(ActivityResult result) {
                System.out.println("MainActivity.onActivityResult" + result.getResultCode());
                if (Activity.RESULT_OK == result.getResultCode()) {
                    getPermission();
                }
            }
        });
        Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
            ArrayList arrayListOf = new ArrayList<>();
            arrayListOf.add(Manifest.permission.BLUETOOTH_CONNECT);
            PermissionUtils.permission(String.valueOf(arrayListOf))
                    .callback(new PermissionUtils.SimpleCallback() {
                        @Override
                        public void onGranted() {
                            System.out.println("MainActivity.onGranted");
                            bluetoothOpenLaunch.launch(intent);
                        }
                        @Override
                        public void onDenied() {
                            System.out.println("MainActivity.onDenied");
                            ToastUtils.showLong("请开启蓝牙权限");
                        }
                    }).request();

        } else {
            bluetoothOpenLaunch.launch(intent);
        }

    }

    private void getPermission() {
        ArrayList arrayListOf = new ArrayList<>();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
            arrayListOf.add(Manifest.permission.BLUETOOTH_SCAN);
            arrayListOf.add(Manifest.permission.BLUETOOTH_CONNECT);
            arrayListOf.add(Manifest.permission.BLUETOOTH_ADVERTISE);
        }
        arrayListOf.add(Manifest.permission.BLUETOOTH);
        arrayListOf.add(Manifest.permission.BLUETOOTH_ADMIN);

        arrayListOf.add(Manifest.permission.ACCESS_FINE_LOCATION);
        arrayListOf.add(Manifest.permission.ACCESS_COARSE_LOCATION);

        PermissionUtils.permission(String.valueOf(arrayListOf))
                .callback(new PermissionUtils.SimpleCallback() {
                    @Override
                    public void onGranted() {
                        ToastUtils.showLong("蓝牙相关权限已成功授权");
                        BluetoothManager blueManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
                        //mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter()
                        mBluetoothAdapter = blueManager.getAdapter();
                    }

                    @Override
                    public void onDenied() {
                        ToastUtils.showLong("请开启蓝牙权限");
                    }
                }).request();

    }

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    监听蓝牙连接配对等相关广播，建议直接采用以下方式：（也有其他方法，搜索低功耗蓝牙的方式 startLeScan ）

     //注册BoradcasrReceiver
    private void registerReceiver() {
        IntentFilter discoveryFilter = new IntentFilter();
        discoveryFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
        discoveryFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);

        discoveryFilter.addAction(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED);
        discoveryFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);

        discoveryFilter.addAction(BluetoothDevice.ACTION_PAIRING_REQUEST);
        discoveryFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);

        discoveryFilter.addAction(BluetoothDevice.ACTION_FOUND);

        registerReceiver(discoveryReceiver, discoveryFilter);
    }


 //蓝牙搜索广播的接收器
    @SuppressLint("MissingPermission")
    private BroadcastReceiver discoveryReceiver = new BroadcastReceiver() {
        String pin = "0000";  //此处为你要连接的蓝牙设备的初始密钥，一般为 1234 或 0000

        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            BluetoothDevice bluetoothDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);  //获取设备,发现远程蓝牙设备


            if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {
                Log.i(TAG, "onReceive: 开始搜索");
            } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
                Log.i(TAG, "onReceive:  搜索结束");
            } else if (BluetoothDevice.ACTION_FOUND.equals(action)) {
                // //获取扫描到的设备

                String name = bluetoothDevice.getName();
                String address = bluetoothDevice.getAddress();
                Log.i(TAG, "onReceive: name=" + name + " address=" + address);
                /*if (bluetoothDevice.getBondState() == BluetoothDevice.BOND_BONDED) {
                    Log.i(TAG, "已配对 onReceive: name=" + name + " address=" + address);
                } else {

                }*/

                //已经配对
                boolean isExist = false;
                for (DeviceBean device : bluetoothDevices) {
                    if (device.getAddress().equals(address)) {
                        isExist = true;
                    }
                }
                if (!isExist) {
                    bluetoothDevices.add(new DeviceBean(name, address));
                    mAdapter.notifyDataSetChanged();
                }

            } else if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
                //Log.i(TAG, "onReceive:  绑定状态改变");
                int state = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, BluetoothDevice.ERROR);
                Log.i(TAG, "onReceive:  绑定状态改变 state=" + state);
                if (state == 12) {
                    Log.i(TAG, "onReceive:  绑定成功 ");
                    ToastUtils.showLong("绑定成功");

                    String name = bluetoothDevice.getName();
                    String address = bluetoothDevice.getAddress();

                    boolean isExist = false;
                    for (DeviceBean device : pairedDevices) {
                        if (device.getAddress().equals(address)) {
                            isExist = true;
                        }
                    }
                    if (!isExist) {
                        /*for (DeviceBean device : pairedDevices) {
                            device.setStatus(false);
                        }*/
                        DeviceBean deviceBean = new DeviceBean(name, address);
                        deviceBean.setStatus(true);
                        pairedDevices.add(0, deviceBean);
                        mDevicePairedAdapter.notifyDataSetChanged();
                    } else {
                        for (DeviceBean device : pairedDevices) {
                            if (device.getAddress().equals(address)) {
                                device.setStatus(true);
                                mDevicePairedAdapter.notifyDataSetChanged();
                                break;
                            }
                        }
                    }
                }


            } else if (BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED.equals(action)) {
                //Log.i(TAG, "onReceive:  连接状态改变");
                int state = intent.getIntExtra(BluetoothAdapter.EXTRA_CONNECTION_STATE, BluetoothAdapter.ERROR);

                String name = bluetoothDevice.getName();
                String address = bluetoothDevice.getAddress();
                Log.i(TAG, "onReceive:  连接状态改变 state=" + state);
                switch (state) {
                    case 0://断开成功
                        for (DeviceBean device : pairedDevices) {
                            if (device.getAddress().equals(address)) {
                                device.setStatus(false);
                                mDevicePairedAdapter.notifyDataSetChanged();
                                break;
                            }
                        }
                        break;
                    //case 1: break;
                    case 2://连接成功
                        Log.i(TAG, "onReceive:  连接成功 address=" + address);
                        ToastUtils.showLong("连接成功");
                        for (DeviceBean device : pairedDevices) {
                            if (device.getAddress().equals(address)) {
                                device.setStatus(true);
                                mDevicePairedAdapter.notifyDataSetChanged();
                                break;
                            }
                        }
                        break;
                    default:
                        break;
                }

            } else if (BluetoothDevice.ACTION_PAIRING_REQUEST.equals(action)) {
                Log.i(TAG, "onReceive:  配对");
                try {
                    // bluetoothDevice.setPairingConfirmation(true);
                    // abortBroadcast();
                    // bluetoothDevice.setPin(pin.getBytes());
                    //1:
                  /*  ClsUtils.setPairingConfirmation(bluetoothDevice.getClass(),bluetoothDevice,true);
                    //2:如果没有将广播终止，则会出现一个一闪而过的配对框。
                    abortBroadcast();
                    //3.调用setPin方法进行配对..
                    boolean ret = ClsUtils.setPin(bluetoothDevice.getClass(), bluetoothDevice, pin);
                    System.out.println("ConnectingDevicesActivity.onReceive ret="+ret);*/

                } catch (Exception e) {
                    throw new RuntimeException(e);
                }

            } else if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)) {
                Log.i(TAG, "onReceive:   蓝牙开关状态改变");
                int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);
                switch (state) {
                    case BluetoothAdapter.STATE_OFF:
                        break;
                    case BluetoothAdapter.STATE_ON:
                        break;
                }
            } else {
                Log.i(TAG, "onReceive:   else action=" + action);
            }
        }
    };


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    我们也可以获取已配对蓝牙列表：

    private void initData() {
        Set bondedDevices = mBluetoothAdapter.getBondedDevices();
        if (bondedDevices != null && bondedDevices.size() > 0) {
            for (BluetoothDevice bondedDevice : bondedDevices) {
                System.out.println("ConnectingDevicesActivity.initData name==" + bondedDevice.getName());
                DeviceBean deviceBean = new DeviceBean(bondedDevice.getName(), bondedDevice.getAddress());
                pairedDevices.add(deviceBean);
            }
            mDevicePairedAdapter.notifyDataSetChanged();
        }
    }

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    蓝牙耳机断开和连接的具体方法：

      public boolean isDisconnected = false;

    /**
     * 断开蓝牙设备连接
     *
     * @param bluetoothDevice BluetoothDevice
     */
    public void disconnect(BluetoothDevice bluetoothDevice) {
        currentBluetoothDevice = bluetoothDevice;
        //获取A2DP代理对象
        mBluetoothAdapter.getProfileProxy(this, disconnectProfileServiceListener, BluetoothProfile.HEADSET);
        //获取HEADSET代理对象
        mBluetoothAdapter.getProfileProxy(this, disconnectProfileServiceListener, BluetoothProfile.A2DP);
    }

    private final BluetoothProfile.ServiceListener disconnectProfileServiceListener = new BluetoothProfile.ServiceListener() {
        @Override
        public void onServiceDisconnected(int profile) {
            System.out.println("ConnectingDevicesActivity.onServiceDisconnected profile="+profile);
        }

        @Override
        public void onServiceConnected(int profile, BluetoothProfile proxy) {
            try {
                if (profile == BluetoothProfile.HEADSET) {
                    //使用HEADSET的协议断开蓝牙设备（使用了反射技术调用断开的方法）
                    BluetoothHeadset bluetoothHeadset = (BluetoothHeadset) proxy;
                    boolean isDisConnect = false;
                    try {
                        Method connect = null;
                        if (isDisconnected) {
                            connect = bluetoothHeadset.getClass().getDeclaredMethod("disconnect", BluetoothDevice.class); //disconnect connect
                        } else {
                            connect = bluetoothHeadset.getClass().getDeclaredMethod("connect", BluetoothDevice.class); //disconnect connect
                        }
                        connect.setAccessible(true);
                        isDisConnect = (boolean) connect.invoke(bluetoothHeadset, currentBluetoothDevice);
                        if (isDisconnected) {
                            Log.d(TAG, "isDisConnect:" + (isDisConnect ? "断开通话成功" : "断开通话失败") + currentBluetoothDevice.getName());
                        } else {
                            Log.d(TAG, "isDisConnect:" + (isDisConnect ? "链接通话成功" : "链接通话失败") + currentBluetoothDevice.getName());
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                }
                if (profile == BluetoothProfile.A2DP) {
                    //使用A2DP的协议断开蓝牙设备（使用了反射技术调用断开的方法）
                    BluetoothA2dp bluetoothA2dp = (BluetoothA2dp) proxy;
                    boolean isDisConnect = false;
                    try {
                        Method connect = null;
                        if (isDisconnected) {
                            connect = bluetoothA2dp.getClass().getDeclaredMethod("disconnect", BluetoothDevice.class);
                        } else {
                            connect = bluetoothA2dp.getClass().getDeclaredMethod("connect", BluetoothDevice.class);
                        }
                        connect.setAccessible(true);
                        isDisConnect = (boolean) connect.invoke(bluetoothA2dp, currentBluetoothDevice);

                        if (isDisconnected) {
                            Log.d(TAG, "isDisConnect:" + (isDisConnect ? "断开音频成功" : "断开音频失败") + currentBluetoothDevice.getName());
                        } else {
                            Log.d(TAG, "isDisConnect:" + (isDisConnect ? "链接音频成功" : "链接音频失败") + currentBluetoothDevice.getName());
                        }

                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                    if (isDisConnect) {
                        for (DeviceBean device : pairedDevices) {
                            if (device.getAddress().equals(currentBluetoothDevice.getAddress())) {
                                device.setStatus(!isDisconnected);
                                mDevicePairedAdapter.notifyDataSetChanged();
                                break;
                            }
                        }
                    }


                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    };

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    源码

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  • 原文地址：https://blog.csdn.net/da_caoyuan/article/details/132836171