如何找到安卓蓝牙版本？

Question

我需要以编程方式在手机上查找 Android 蓝牙版本。谁能给我提示如何做到这一点？

Answer 1

据我所知（我做了很多研究）没有办法知道你的 Android 蓝牙设备的硬件版本是什么。 (4.0, 4.2, 5.0,...)

有些人声称他们有一个可以做到这一点的应用程序，但我从未见过一个有效的例子。这些应用会显示很多版本号，但不会显示蓝牙硬件版本。

有些人想出了一个技巧，可以显示蓝牙软件的版本号，但这不是我们想知道的。

有一些技巧可以获得蓝牙设备的功能，但同样，这不是我们想知道的。

Answer 2

恕我直言，使用 android 您只能区分蓝牙或 Bluetooth_LE 的存在。但我怀疑 android 是否支持识别蓝牙版本（例如 BT2.0、BT2.1+EDR、BT3.0 等）。 以编程方式识别 BT 或 BLE 存在的方法可能是：

PackageManager pm = getActivity().getPackageManager();
boolean isBT = pm.hasSystemFeature(PackageManager.FEATURE_BLUETOOTH);
boolean isBLE = pm.hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE);

此后，使用 isBT 或 isBLE 标志，可以引导应用程序流。

Answer 3

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

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

// Use this check to determine whether BLE is supported on the device. Then
// you can selectively disable BLE-related features.
if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
    Toast.makeText(this, R.string.ble_not_supported, Toast.LENGTH_SHORT).show();
    finish();
}

http://developer.android.com/guide/topics/connectivity/bluetooth-le.html

Answer 4

您只需尝试以下方式查找蓝牙版本即可。

Androidmanifest.xml

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

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-feature
    android:name="android.hardware.bluetooth_le"
    android:required="false" />

在 onCreate() 中编写代码

public void onCreate(Bundle savedInstanceState) {

    // Use this check to determine whether BLE is supported on the device.  Then you can
    // selectively disable BLE-related features.
    if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
        Toast.makeText(this, R.string.ble_not_supported, Toast.LENGTH_SHORT).show();
        //  finish();
    }

    // Initializes a Bluetooth adapter.  For API level 18 and above, get a reference to
    // BluetoothAdapter through BluetoothManager.
    final BluetoothManager bluetoothManager =
            (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
    mBluetoothAdapter = bluetoothManager.getAdapter();

    // Checks if Bluetooth is supported on the device.
    if (mBluetoothAdapter == null) {
        Toast.makeText(this, R.string.error_bluetooth_not_supported, Toast.LENGTH_SHORT).show();
        // finish();
        return;
    }
}

在 onResume() 中编写代码

protected void onResume() {
    mLeDeviceListAdapter = new LeDeviceListAdapter();
    setListAdapter(mLeDeviceListAdapter);
}

适配器

// Adapter for holding devices found through scanning.
private class LeDeviceListAdapter extends BaseAdapter {
    private ArrayList<BluetoothDevice> mLeDevices;

    private LayoutInflater mInflator;

    public LeDeviceListAdapter() {
        super();
        //mLeDevices = new ArrayList<BluetoothDevice>();

        mInflator = DeviceScanActivity.this.getLayoutInflater();
    }

    public void addDevice(BluetoothDeviceModel device, int rssiValue, String address) {

       Log.d("TAG", "map size is : " + mapBluetoothDevice.size());
    }



    public List<BluetoothDevice> getDevice(int position) {
        return mLeDevices.get(position);
    }

    public void clear() {
        mLeDevices.clear();
    }

    @Override
    public int getCount() {
        return mLeDevices.size();
    }

    @Override
    public Object getItem(int i) {

        return mLeDevices.get(i);
    }

    @Override
    public long getItemId(int i) {
        return i;
    }


    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        ViewHolder viewHolder;
        // General ListView optimization code.
        if (view == null) {
            view = mInflator.inflate(R.layout.listitem_device, null);
            viewHolder = new ViewHolder();
            viewHolder.deviceAddress = (TextView) view.findViewById(R.id.device_address);
            viewHolder.deviceName = (TextView) view.findViewById(R.id.device_name);
            viewHolder.deviceRssi = (TextView) view.findViewById(R.id.device_rssi);
            viewHolder.deviceDistance = (TextView) view.findViewById(R.id.device_distance);

            view.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) view.getTag();
        }

        BluetoothDevice device = mLeDevices.get(i);

        final String deviceName = device.getName();

        if (deviceName != null && deviceName.length() > 0)
            viewHolder.deviceName.setText(deviceName);
        else
            viewHolder.deviceName.setText(R.string.unknown_device);

        viewHolder.deviceRssi.setText("Version : " + device.getVersion());
        viewHolder.deviceAddress.setText(device.getDevice().getBluetoothAddress());

        }

        viewHolder.deviceDistance.setText("Distance : " + String.valueOf(distance));
        return view;
    }

这是您与蓝牙交互时的核心代码。