Android 基础-搜索附近蓝牙

1.打开蓝牙

 private void initBluetooth() {
        // 判断是否打开蓝牙
        if (!mBluetoothAdapter.isEnabled()) {
            //弹出对话框提示用户是后打开
            Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(intent, SEARCH_CODE);
        } else {
            // 不做提示，强行打开
            mBluetoothAdapter.enable();
        }

    mDefaultBluetoothAdapter=BluetoothAdapter.getDefaultAdapter();
    booth = new HashMap<String, BluetoothDevice>();


        registerBrodcast();

    }

2.注册广播

  private void registerBrodcast() {
        // 找到设备的广播
        IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
        // 注册广播
        registerReceiver(receiver, filter);
        // 搜索完成的广播
        IntentFilter filter1 = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
        // 注册广播
        registerReceiver(receiver, filter1);

    }

3.开始搜索蓝牙

    private void startScanBluth() {
        // 判断是否在搜索,如果在搜索，就取消搜索
        if (mBluetoothAdapter.isDiscovering()) {
            mBluetoothAdapter.cancelDiscovery();
        }
        // 开始搜索
        mBluetoothAdapter.startDiscovery();
        if (progressDialog == null) {
            progressDialog = new ProgressDialog(this);
        }
        progressDialog.setMessage("正在搜索，请稍后！");
        progressDialog.show();

    }

3.广播接收器

 Map<String, BluetoothDevice> booth;
 private List<BluetoothDevice> mBlueList = new ArrayList<>();



 /**
     * 广播接收器
     */
    private final BroadcastReceiver receiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            // 收到的广播类型
            String action = intent.getAction();
            Set<BluetoothDevice> bondedDevices = mDefaultBluetoothAdapter.getBondedDevices();
            for (BluetoothDevice device : bondedDevices) {
                if (!Utils.isNullOrBlank(device.getName())) {
                    booth.remove(device.getName());
                    booth.put(device.getName(), device);
                }
            }

            // 发现设备的广播
            if (BluetoothDevice.ACTION_FOUND.equals(action)) {
                // 从intent中获取设备
                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                // 没否配对
                if (device.getBondState() != BluetoothDevice.BOND_BONDED) {

                    if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
                        if (!Utils.isNullOrBlank(device.getName())) {
                            booth.remove(device.getName());
                            booth.put(device.getName(), device);
                        }
                    }
                }
                // 搜索完成
            } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
                // 关闭进度条
                progressDialog.dismiss();
//                ArrayList<String> printNameArray = new ArrayList<String>(booth.keySet());
                for (String key : booth.keySet()){
                    if(!mBlueList.contains(booth.get(key))){
                        if(booth.get(key).getName().contains("RP4")){
                            mBlueList.add(booth.get(key));
                        }

                    }
                }
                showBluetoothPop(mBlueList);
                Log.e(TAG, "onReceive: 搜索完成");
            }
        }
    };