Bluetooth low energy android 没有给我一个真实地址只有空名称

Question

谁能帮帮我？我想使用低功耗蓝牙扫描附近的设备，但是当我扫描它时，它给我随机地址，名称为 null 这是我的代码：当我在两个 phone 上打开 BLE 广告时，我下载了一个名为 BLE 扫描仪的应用程序，之后我在我的应用程序上打开我的扫描，它给了我真实的地址，否则什么都没有发生，我的 phone 没有t 扫描任何 phone :(

public void scanBLEDevices(Boolean       enable) {
 final ScanCallback scanCallback = new ScanCallback() {
    @Override
    public void onScanResult(int callbackType, ScanResult result) {
        super.onScanResult(callbackType, result);
        Toast.makeText(BluetoothActivity.this, "result scan", Toast.LENGTH_SHORT).show();
        BluetoothDevice device = result.getDevice();
        String bluetoothAddressScanned = device.getAddress();
        Toast.makeText(BluetoothActivity.this, bluetoothAddressScanned + " "+device.getName()+result.getRssi(), Toast.LENGTH_SHORT).show();
      

    }

    @Override
    public void onBatchScanResults(List<ScanResult> results) {
        super.onBatchScanResults(results);
        Toast.makeText(BluetoothActivity.this, "result batch", Toast.LENGTH_SHORT).show();

    }

    @Override
    public void onScanFailed(int errorCode) {
        super.onScanFailed(errorCode);
        Toast.makeText(BluetoothActivity.this, "ERRORRR scan!!!" , Toast.LENGTH_SHORT).show();
    }
};
ScanSettings scanSettings = new ScanSettings.Builder().
        setScanMode(ScanSettings.SCAN_MODE_LOW_POWER).
        setCallbackType(ScanSettings.CALLBACK_TYPE_ALL_MATCHES)
        .setMatchMode(ScanSettings.MATCH_MODE_AGGRESSIVE)
        //.setNumOfMatches(ScanSettings.MATCH_NUM_ONE_ADVERTISEMENT)
        .setReportDelay(0)
        .build();
/*final BluetoothAdapter.LeScanCallback mscanCallback = new BluetoothAdapter.LeScanCallback() {
    @Override
    public void onLeScan(BluetoothDevice device, int rssi, byte[] scanRecord) {
        Toast.makeText(BluetoothActivity.this, device.getName()+ " "+device.getAddress() , Toast.LENGTH_SHORT).show();
    }
}; */

if(enable){
    if (bleScanner != null) {

       handler.postDelayed(new Runnable() {
                                @Override
                                public void run() {
                                    bleScanner.stopScan(scanCallback);
                                 //   BA.stopLeScan(mscanCallback);
                                }
                            },30000);
       //BA.startLeScan(mscanCallback);
        bleScanner.startScan(null, scanSettings, scanCallback);
        //bleScanner.startScan(scanCallback);
    Toast.makeText(BluetoothActivity.this, "Scan Started!", Toast.LENGTH_SHORT).show();

    //lv.setAdapter(adapter);

} else {
    Toast.makeText(BluetoothActivity.this, "Couldn't get Scanner object", Toast.LENGTH_SHORT).show();
}}
if(!enable) { try{
    bleScanner.stopScan(scanCallback);
   // BA.stopLeScan(mscanCallback);
    Toast.makeText(BluetoothActivity.this, "scan stopped!", Toast.LENGTH_SHORT).show();}
    catch (IllegalStateException e){
        Toast.makeText(BluetoothActivity.this, "Illegal state exception "+e, Toast.LENGTH_SHORT).show();
    }
}
   }

Answer 1

Bluetooth devices send advertising packets (PDUs) to broadcast data, and to allow other devices (scanners) to find and connect to them.

所以，如果您附近没有广告设备，您的扫描仪将找不到任何东西。在这里您可以找到有关广告和扫描的详细信息：

https://dev.ti.com/tirex/explore/node?node=AD4sGbaamTCyn0DvZgBAsg__krol.2c__LATEST

Bluetooth low energy android 没有给我一个真实地址只有空名称

Bluetooth low energy android doesn’t give me a real address only null name

java

android

bluetooth