Android如何关闭蓝牙BL Scan
时间: 2023-09-11 11:11:39 浏览: 72
要停止Android设备的蓝牙LE扫描,可以使用以下步骤:
1. 首先,获取BluetoothAdapter的实例,使用如下代码:
```
BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
BluetoothAdapter bluetoothAdapter = bluetoothManager.getAdapter();
```
2. 接下来,创建一个BluetoothLeScanner对象:
```
BluetoothLeScanner bluetoothLeScanner = bluetoothAdapter.getBluetoothLeScanner();
```
3. 最后,调用BluetoothLeScanner的stopScan()方法停止扫描:
```
bluetoothLeScanner.stopScan(mScanCallback);
```
其中,mScanCallback是用于接收扫描结果的回调函数。在调用stopScan()之后,回调函数将不再被调用。
完整的示例代码如下:
```
private BluetoothAdapter bluetoothAdapter;
private BluetoothLeScanner bluetoothLeScanner;
private ScanCallback mScanCallback;
// 初始化蓝牙适配器和扫描器
BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
bluetoothAdapter = bluetoothManager.getAdapter();
bluetoothLeScanner = bluetoothAdapter.getBluetoothLeScanner();
// 开始扫描
mScanCallback = new ScanCallback() {
@Override
public void onScanResult(int callbackType, ScanResult result) {
// 处理扫描结果
}
};
bluetoothLeScanner.startScan(mScanCallback);
// 停止扫描
bluetoothLeScanner.stopScan(mScanCallback);
```