要解决Android蓝牙低功耗设备无法相互检测到的问题，需要进行以下步骤：

1. 添加所需权限到AndroidManifest.xml文件中：

2. 检查设备是否支持蓝牙低功耗（BLE）功能：

private boolean isBLESupported() {
    if (getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
        return true;
    }
    return false;
}

3. 初始化蓝牙适配器和检查蓝牙是否已启用：

private BluetoothAdapter mBluetoothAdapter;

private void initBluetooth() {
    final BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
    mBluetoothAdapter = bluetoothManager.getAdapter();

    if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {
        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
    }
}

4. 开启扫描BLE设备：

private BluetoothLeScanner mBluetoothLeScanner;
private ScanCallback mScanCallback;

private void startBLEScan() {
    mBluetoothLeScanner = mBluetoothAdapter.getBluetoothLeScanner();

    // 设置扫描回调
    mScanCallback = new ScanCallback() {
        @Override
        public void onScanResult(int callbackType, ScanResult result) {
            // 处理扫描结果
        }

        @Override
        public void onScanFailed(int errorCode) {
            // 处理扫描失败
        }
    };

    // 开始扫描
    mBluetoothLeScanner.startScan(mScanCallback);
}

5. 停止扫描BLE设备：

private void stopBLEScan() {
    if (mBluetoothLeScanner != null && mScanCallback != null) {
        mBluetoothLeScanner.stopScan(mScanCallback);
    }
}

6. 确保设备已经授予位置权限，否则请求授权：

private static final int REQUEST_LOCATION_PERMISSION = 1;

private void checkLocationPermission() {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
            != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(this,
                new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                REQUEST_LOCATION_PERMISSION);
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if (requestCode == REQUEST_LOCATION_PERMISSION) {
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            // 权限已授予，执行相关操作
        } else {
            // 权限被拒绝，处理错误情况
        }
    }
}

请注意，上述代码示例仅涵盖了解决Android蓝牙低功耗设备无法相互检测到的基本步骤。根据具体情况，您可能需要进一步处理错误情况、处理设备之间的连接和通信等。