Question

private UUID[] RX_SERVICE_UUID = new UUID[1]; 
RX_SERVICE_UUID[0] = UUID.fromString("0000e4eee-1112-1111-1111-14addb4as215");

当我将函数与UUID mBluetoothAdapter.startLeScan(RX_SERVICE_UUID,mLeScanCallback)方法一起使用时。当我在没有UUID的情况下使用mBluetoothAdapter.startLeScan(mLeScanCallback)时，它不是在扫描设备，而是在扫描设备。请提出建议。

Answer 1

我认为您正在测试棉花糖中的应用

扫描任何ble设备需要一定的权限

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

    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <uses-feature android:name="android.hardware.bluetooth_le" />

启用蓝牙

 // Ensures Bluetooth is enabled on the device.  If Bluetooth is not currently enabled,
        // fire an intent to display a dialog asking the user to grant permission to enable it.
        if (!mBluetoothAdapter.isEnabled()) {
            if (!mBluetoothAdapter.isEnabled()) {
                Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
            }
        }

        // Initializes list view adapter.
        mLeDeviceListAdapter = new LeDeviceListAdapter();
        mLeDevicePairedListAdapter = new LeDevicePairedListAdapter();
        setListAdapter(mLeDeviceListAdapter);
        setPairedListAdapter(mLeDevicePairedListAdapter);
        scanLeDevice(true);

使用此方法开始扫描

 private void scanLeDevice(final boolean enable) {
        if (enable) {
            mScanning = true;
            selectedPositions = new ArrayList<>();
            pairselectedPositions = new ArrayList<>();
            mBluetoothAdapter.startLeScan(mLeScanCallback);
        } else {
            mScanning = false;
            mBluetoothAdapter.stopLeScan(mLeScanCallback);
        }
//        invalidateOptionsMenu();
    }

回叫响应

//设备扫描回调。

private BluetoothAdapter.LeScanCallback mLeScanCallback =
        new BluetoothAdapter.LeScanCallback() {

            @Override
            public void onLeScan(final BluetoothDevice device, final int rssi, byte[] scanRecord) {
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
//if device bounded then added another list and not bound then using other list diplay in list
                        if (device.getBondState() == BluetoothDevice.BOND_BONDED) {
                            mLeDevicePairedListAdapter.addDevice(device, rssi);
                        } else {
                            mLeDeviceListAdapter.addDevice(device, rssi);
                        }
                    }
                });
            }
        };

BluetoothAdapter.startLeScan不适用于过滤器

1 个答案: