解决Android 8.0和9.0无法获取SSID (unknow ssid)-摩杜云开发者社区

一直都在做wifi相关的东西

今天遇到一个问题是8.0的机型无法获取到ssid

然后就查询了一番终于找到解决方案

wifi名称获取代码

WifiManager my_wifiManager = ((WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE));
            assert my_wifiManager != null;
            wifiInfo = my_wifiManager.getConnectionInfo();
            ssid = wifiInfo.getSSID();

Android8.0 解决方案

一、就是用下面的代码可以获取（不建议使用）

if (Build.VERSION.SDK_INT > Build.VERSION_CODES.O) {
                ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
                assert cm != null;
                NetworkInfo info = cm.getActiveNetworkInfo();
                if (info != null && info.isConnected()) {
                    ssid = info.getExtraInfo();
                    logger.info("WiFi SSID: " + ssid);

                }
            }

二、8.0强烈推荐申请权限定位权限就可获取

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

9.0在8.0基础上新增权限

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

9.0华为手机无法获取解决方案

WifiManager my_wifiManager = ((WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE));
            assert my_wifiManager != null;
            wifiInfo = my_wifiManager.getConnectionInfo();
            ssid = wifiInfo.getSSID();
int networkId = wifiInfo.getNetworkId();
                    List<WifiConfiguration> configuredNetworks = my_wifiManager.getConfiguredNetworks();
                    for (WifiConfiguration wifiConfiguration:configuredNetworks){
                        if (wifiConfiguration.networkId==networkId){
                            ssid=wifiConfiguration.SSID;
                            break;
                        }
                    }

权限申请方式

使用开源库

implementation 'com.yanzhenjie:permission:2.0.0-rc12'

https://github.com/yanzhenjie/AndPermission

if (AndPermission.hasPermissions(this, Manifest.permission.ACCESS_WIFI_STATE, Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION)) {
            if (NetUtils.getInstance().isWifi(TabActivity.this)) {
                startActivity(new Intent(TabActivity.this, WifiManagerActivity.class));
                overridePendingTransition(R.anim.in_from_right, R.anim.out_to_right);
            } else {
                com.xinli.wenet.utils.Toast.show(TabActivity.this, "请连接Wi-Fi后操作", 1);
            }
        } else {
            requestPermission(Manifest.permission.ACCESS_WIFI_STATE, Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION);
        }