Question

如果我使用API 27编译但是目标API 25，我正确地获得了这些值。如果我将targetSdkVersion设置为27，那么这些值将无法正确检索。

定位SDK 25或更低版本，值是正确的，但定位26或更多，我得到这些值：

SSID提供<unknown ssid>

BBSSID提供02:00:00:00:00:00

这些是我的清单权限，都是正常权限，不需要用户授权：

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

这是示例代码：

WifiManager wifiManager = (WifiManager)context.getSystemService(Context.WIFI_SERVICE);
WifiInfo connectionInfo = wifiManager.getConnectionInfo();
connectionInfo.getSSID();
connectionInfo.getBSSID();

针对SDK 26或更高版本时发生了哪些变化？我们还应该做些什么才能获得这些价值观？

由于

Answer 1

您需要从API 27开始的位置许可

Answer 2

Google已使用WifiManager更改了其政策，因为您可以从SDK＆gt; = 27跟踪用户的位置跟踪wifi位置。因此，您需要访问位置权限才能使用getSSID（）进行应用。要使用此代码，请遵循以下内容。

正如@Samuel Eminet上面的回答，您需要ACCESS_FINE_LOCATION或ACCESS_COARSE_LOCATION。我使用了ACCESS_FINE_LOCATION因为 ACCESS_COARSE_LOCATION请求仅限NETWORK_PROVIDE的权限 ACCESS_FINE_LOCATION请求NETWORK_PROVIDE和GPS_PROVIDER的权限。

Refer here for more information

在您的清单文件中

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

以及您的wifi管理员所在的位置，添加此代码以请求权限。

 if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
            != PackageManager.PERMISSION_GRANTED){

        //Permission Not Granted
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, PERMISSION_FINE_LOCATION);
    }



    @Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {                                   
        switch (requestCode) {

        case PERMISSION_FINE_LOCATION:
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //permission granted keep going status
                Log.d(TAG, "PERMISSION GRANTED");
            }
            else {
                Log.d(TAG, "PERMISSION DENIED");
            }
    }
}

Answer 3

还有一件事需要记住（我学到了很多东西）。如果您将应用程序侧载到设备上，请不要忘记＆＃34;允许＆＃34;应用权限中的位置权限（长按应用，应用信息）。它默认是关闭的，因此你会得到

Answer 4

我遇到了同样的问题。发生此问题的Android版本高于API 23。解：您需要在下面添加build.gradle文件。

implementation 'com.google.android.gms:play-services-location:15.0.0'

并且您拥有以下规则的许可。

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION">
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION">

下面的代码自动为应用程序中的位置提供权限。

        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        try {
            LocationRequest request = new LocationRequest()
                    .setFastestInterval(1500)
                    .setInterval(3000)
                    .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

            builder = new LocationSettingsRequest.Builder()
                    .addLocationRequest(request);

            try {
                Task<LocationSettingsResponse> result =
                        LocationServices.getSettingsClient(this.getApplicationContext()).checkLocationSettings(builder.build());
                result.addOnCompleteListener(new OnCompleteListener<LocationSettingsResponse>() {
                    @Override
                    public void onComplete(@NonNull Task<LocationSettingsResponse> task) {
                        try {
                            task.getResult(ApiException.class);
                        } catch (ApiException e) {
                            switch (e.getStatusCode()) {
                                case LocationSettingsStatusCodes
                                        .RESOLUTION_REQUIRED:
                                    ResolvableApiException resolveApiException = (ResolvableApiException) e;
                                    try {
                                        resolveApiException.startResolutionForResult(WifiConnectionActivity.this, REQUEST_CHECK_CODE);
                                    } catch (IntentSender.SendIntentException ex) {
                                        ex.printStackTrace();
                                    } catch (ClassCastException ex) {

                                    }
                                    break;

                                case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
                                    break;
                            }
                        }
                    }
                });
            } catch (Exception x) {
            }
            checkPermissions();
        } catch (Exception a) {
        }
    }


void checkPermissions() {
    if(ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) !=
            PackageManager.PERMISSION_GRANTED){
        ActivityCompat.requestPermissions(WifiConnectionActivity.this, new String[]
                {
                        Manifest.permission.ACCESS_COARSE_LOCATION
                }, REQUEST_LOCATION);
    }
    else{
        //Toast.makeText(getActivity(), "GPS is already permissioned", Toast.LENGTH_SHORT).show();
    }
}

Answer 5

下面是代码。

public String getMac() {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        //Permission Not Granted
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
    }else{
        WifiManager wifimanage = (WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE);
        WifiInfo wifiinfo = wifimanage.getConnectionInfo();
        macAddress = wifiinfo.getBSSID();//Get the mac address of the currently connected network;
    }
    return macAddress;
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    switch (requestCode) {
        case 1:
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //permission granted keep going status
                Log.d("mac", "PERMISSION GRANTED");
                WifiManager wifimanage = (WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE);
                WifiInfo wifiinfo = wifimanage.getConnectionInfo();
                macAddress = wifiinfo.getBSSID();//Get the mac address of the currently connected network;
            } else {
                Log.d("mac", "PERMISSION DENIED");
            }
    }
}

然后调用getMac（）解决此问题。

WifiManager.WifiInfo getSSID＆amp;如果targetSdkVersion＆gt; = 26，则getBSSID无效

5 个答案: