Android 蓝牙2.0工具类

1.加入工具类
/** * @anthor GrainRain * @funcation 蓝牙2.0工具类 * @date 2020/7/20 */public class BluetoothUtils {    private BluetoothAdapter adapter;    private BluetoothSocket bluetoothSocket = null;    private static final UUID bluetoothUUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");    private OutputStream outputStream = null;    private InputStream inputStream = null;    private Context context;    private boolean isConnection = false;    private MessageCallback callback;    public BluetoothUtils(Context mContext, MessageCallback mCallback) {        context = mContext;        openBluetooth();        registerBoradcastReceiver();        callback = mCallback;        if (adapter == null) {            adapter = BluetoothAdapter.getDefaultAdapter();        }    }    /**     * 连接蓝牙     **/    @SuppressLint("StaticFieldLeak")    public void connect(final String address) {        new AsyncTask() {            @Override            protected String doInBackground(Object[] params) {                try {                    BluetoothDevice device = adapter.getRemoteDevice(address);                    bluetoothSocket = device.createRfcommSocketToServiceRecord(bluetoothUUID);                    adapter.cancelDiscovery();                    bluetoothSocket.connect();                    outputStream = bluetoothSocket.getOutputStream();                    inputStream = bluetoothSocket.getInputStream();                    while (true) {                        byte[] data = new byte[500];                        int count = inputStream.read(data);                        int[] data_int = new int[data.length];                        for (int i = 0; i < data.length; i++) {                            data_int[i] = (byte) (data[i] & 0xff);                        }                        if(callback != null) {                            callback.bluttoothMessage(data_int);                        }                    }                } catch (Exception e) {                    L.e(e);                }                return null;            }            @Override            protected void onPreExecute() {                super.onPreExecute();            }            @Override            protected void onPostExecute(Object o) {                super.onPostExecute(o);            }        }.execute();    }    /**     * 获取已配对的蓝牙列表     *     * @return Set     */    public Set getAlreadyPairedBluetoothDeviceList() {        Set devices = null;        if (adapter != null) {            devices = adapter.getBondedDevices();            if (devices.size() > 0) {                for (Iterator it = devices.iterator(); it.hasNext(); ) {                    BluetoothDevice device = (BluetoothDevice) it.next();                    L.e(device.getName() + " " + device.getAddress());                }            } else {                L.e("没有已配对的蓝牙设备");            }        }        return devices;    }    /**     * 发送数据     *     * @param message     */    public void sendMessage(String message) {        sendMessage(message.getBytes());    }    /**     * 发送数据     *     * @param message     */    public void sendMessage(byte[] message) {        try {            outputStream.write(message);            outputStream = bluetoothSocket.getOutputStream();            inputStream = bluetoothSocket.getInputStream();        } catch (IOException e) {            e.printStackTrace();        }    }    /**     * 打开蓝牙     */    public void openBluetooth() {        if (adapter != null) {            if (!adapter.isEnabled()) {                Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);                context.startActivity(intent);            }        }    }    /**     * 显示蓝牙列表对话框     */    public void showDialog() {        final Set bluetoothDeviceSet = getAlreadyPairedBluetoothDeviceList();        final List bluetoothDeviceList = new ArrayList(bluetoothDeviceSet);        final String[] items = new String[bluetoothDeviceSet.size()];        for (int i = 0; i < bluetoothDeviceList.size(); i++) {            items[i] = bluetoothDeviceList.get(i).getName() + " " + bluetoothDeviceList.get(i).getAddress();        }        AlertDialog.Builder listDialog = new AlertDialog.Builder(context);        listDialog.setTitle("已配对蓝牙列表");        listDialog.setItems(items, new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                connect(bluetoothDeviceList.get(which).getAddress());                toast.show(bluetoothDeviceList.get(which).getName() + " " + bluetoothDeviceList.get(which).getAddress());            }        });        listDialog.show();    }    /**     * 判断蓝牙是否连接     */    public boolean isConnection() {//        int a2dp = adapter.getProfileConnectionState(BluetoothProfile.A2DP);//        int headset = adapter.getProfileConnectionState(BluetoothProfile.HEADSET);//        int health = adapter.getProfileConnectionState(BluetoothProfile.HEALTH);//        return adapter != null && (a2dp == BluetoothAdapter.STATE_CONNECTED ||//                headset == BluetoothAdapter.STATE_CONNECTED ||//                health == BluetoothAdapter.STATE_CONNECTED);        return isConnection;    }    //注册监听蓝牙连接状态    private void registerBoradcastReceiver() {        IntentFilter stateChangeFilter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);        IntentFilter connectedFilter = new IntentFilter(BluetoothDevice.ACTION_ACL_CONNECTED);        IntentFilter disConnectedFilter = new IntentFilter(BluetoothDevice.ACTION_ACL_DISCONNECTED);        context.registerReceiver(stateChangeReceiver, stateChangeFilter);        context.registerReceiver(stateChangeReceiver, connectedFilter);        context.registerReceiver(stateChangeReceiver, disConnectedFilter);    }    //蓝牙状态回调    private BroadcastReceiver stateChangeReceiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {            String action = intent.getAction();            if (action.equals(BluetoothDevice.ACTION_ACL_CONNECTED)) {                toast.show("蓝牙已连接");                isConnection = true;            } else if (action.equals(BluetoothDevice.ACTION_ACL_DISCONNECTED)) {                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);                String name = device.getName();                toast.show("蓝牙已断开");                isConnection = false;            }        }    };    public interface MessageCallback {        void bluttoothMessage(int[] data);    }}
2.加入蓝牙和定位权限
3.使用
3.1.继承和实现蓝牙信息回调接口
implements BluetoothUtils.MessageCallback
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3.2. 初始化类
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3.3.连接蓝牙
ble.showDialog(); 显示已配对蓝牙列表并连接选中的蓝牙
ble.connect(“address”); 直接传入需要连接的蓝牙MAC地址
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