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获取Android上可用蓝牙设备的列表

android-bluetooth bluetooth android java

4

Torantula · 技术社区 · 7 年前

在里面 this question ,@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
            }           
        }
    };

然而,我不明白如何获得对找到的设备的引用,如何做到这一点?

我无权对原来的问题发表评论,所以我选择在这里进行扩展。

2 回复 | 直到 7 年前

1

3

janos slartidan 7 年前

The Bluetooth guide in the Android documentation 解释如下:

为了接收有关发现的每个设备的信息,应用程序必须为ACTION\u FOUND intent注册一个BroadcastReceiver。系统为每个设备广播此意图。intent包含额外字段extra\u DEVICE和extra\u CLASS,这两个字段分别包含一个BluetoothDevice和一个BluetoothClass。

还包括以下示例代码:

@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
        }
    }
};

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

2

stkent 7 年前

从 ACTION_FOUND documentation :

始终包含额外字段 EXTRA_DEVICE 和 EXTRA_CLASS . 可以包含额外字段 EXTRA_NAME 和/或 EXTRA_RSSI 如果可用。

EXTRA_DEVICE can be used to obtain the BluetoothDevice that was found 通过以下代码:

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