在 Android 上获取可用蓝牙设备列表

Question

在中，@nhoxbypass 提供此方法用于将找到的蓝牙设备添加到列表中：

private BroadcastReceiver myReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            Message msg = Message.obtain();
            String action = intent.getAction();
            if(BluetoothDevice.ACTION_FOUND.equals(action)){
               //Found, add to a device list
            }           
        }
    };

但是，我不明白如何获得对找到的设备的引用，这怎么办？

我没有权限对原始问题发表评论，所以我选择在这里扩展它。

Answer 1

来自ACTION_FOUND documentation：

Always contains the extra fields EXTRA_DEVICE and EXTRA_CLASS. Can contain the extra fields EXTRA_NAME and/or EXTRA_RSSI if they are available.

EXTRA_DEVICE can be used to obtain the BluetoothDevice that was found 通过如下代码：

BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);

Answer 2

The Bluetooth guide in the Android documentation 解释如下：

In order to receive information about each device discovered, your application must register a BroadcastReceiver for the ACTION_FOUND intent. The system broadcasts this intent for each device. The intent contains the extra fields EXTRA_DEVICE and EXTRA_CLASS, which in turn contain a BluetoothDevice and a BluetoothClass, respectively.

此示例代码也包含在内：

@Override
protected void onCreate(Bundle savedInstanceState) {
    ...

    // Register for broadcasts when a device is discovered.
    IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
    registerReceiver(mReceiver, filter);
}

// Create a BroadcastReceiver for ACTION_FOUND.
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (BluetoothDevice.ACTION_FOUND.equals(action)) {
            // Discovery has found a device. Get the BluetoothDevice
            // object and its info from the Intent.
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            String deviceName = device.getName();
            String deviceHardwareAddress = device.getAddress(); // MAC address
        }
    }
};

如果您在 Android 上使用蓝牙，我建议您仔细阅读该指南。然后再读一遍 ;-)

在 Android 上获取可用蓝牙设备列表

Obtaining a List of Available Bluetooth Devices on Android

java

android

bluetooth

android-bluetooth