Android的蓝牙连接获取设备

Question

我怎样才能获得的全部Android连接的蓝牙设备的列表，无论轮廓的？

另外，我看到，你可以得到所有连接的设备用于通过BluetoothManager.getConnectedDevices特定的配置文件。

我想我可以看到哪些设备通过ACTION_ACL_CONNECTED / ACTION_ACL_DISCONNECTED ...用于连接/断开连接听了似乎很容易出错。

但我不知道是否有更简单的方法来获得所有连接的蓝牙设备的列表。

Answer 1

要查看完整列表，这是一个2步操作：

1. 目前，获得配对的设备列表
2. 扫描，或发现其他所有的范围

要获得一个列表，迭代，当前配对的设备：

Set<BluetoothDevice> pairedDevices = BluetoothAdapter.getDefaultAdapter().getBondedDevices();
if (pairedDevices.size() > 0) {
    for (BluetoothDevice d: pairedDevices) {
        String deviceName = d.getName();
        String macAddress = d.getAddress();
        Log.i(LOGTAG, "paired device: " + deviceName + " at " + macAddress);
        // do what you need/want this these list items
    }
}

发现是多一点点复杂的操作。要做到这一点，你需要告诉BluetoothAdapter开始扫描/发现。当它发现的东西，它发出的是你需要接收与广播接收器意图。

首先，我们将设置接收器：

private void setupBluetoothReceiver()
{
    BroadcastRecevier btReceiver = new BroadcastReciver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            handleBtEvent(context, intent);
        }
    };
    IntentFilter eventFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
    // this is not strictly necessary, but you may wish
    //  to know when the discovery cycle is done as well
    eventFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
    myContext.registerReceiver(btReceiver, eventFilter);
}

private void handleBtEvent(Context context, Intent intent)
{
    String action = intent.getAction();
    Log.d(LOGTAG, "action received: " + action);

    if (BluetoothDevice.ACTION_FOUND.equals(action)) {
        BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
        Log.i(LOGTAG, "found device: " + device.getName());
    } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
        Log.d(LOGTAG, "discovery complete");
    }
}

现在，所有剩下的就是告诉BluetoothAdapter开始扫描：

BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter();
// if already scanning ... cancel
if (btAdapter.isDiscovering()) {
    btAdapter.cancelDiscovery();
}

btAdapter.startDiscovery();