关于手机监听不到Wi-Fi连接的原因 unknown ssid

最近做一个监听wifi开启、关闭、连接监听的项目

手机设置中连接成功后在代码中监听不到连接的哪一个Wi-Fi

String ssid = connectedWifiInfo.getSSID();
int networkId = connectedWifiInfo.getNetworkId();
wifi连接上了 ssid==<unknown ssid>,networkId==0

1、手机定位服务(VIVO) 、位置信息（小米）没有开启的时候，开启wifi 连接成功之后，在广播中也监听不到；

关于手机监听不到Wi-Fi连接的原因 unknown ssid

2、开启过程：

2-1 首先判断用户是否打开系统定位服务

/*判断用户是否打开系统定位服务*/
public boolean isLocationEnabled() {
    int locationMode = 0;
    String locationProviders;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        try {
            locationMode = Settings.Secure.getInt(getContentResolver(), Settings.Secure.LOCATION_MODE);
        } catch (Settings.SettingNotFoundException e) {
            e.printStackTrace();
            return false;
        }
        return locationMode != Settings.Secure.LOCATION_MODE_OFF;
    } else {
        locationProviders = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
        return !TextUtils.isEmpty(locationProviders);
    }
}

2-2 弹出对话框提醒；

2-3 开启

private void startSettingLocationService() { Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); //可以在onActivityResult中根据该请求码判断用户是否已经在设置页面打开位置服务 startActivityForResult(intent, START_ACTIVITY_FOR_START_LOCATION_SERVICE); }

2-4 定位服务开启与否提示

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    switch (requestCode) {
     
        case START_ACTIVITY_FOR_START_LOCATION_SERVICE:
            Log.e(TAG, "onActivityResult: data==" + data);
            //TODO
            if (isLocationEnabled()) {
                Toast.makeText(instance, "定位服务开启成功", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(instance, "定位服务开启失败", Toast.LENGTH_SHORT).show();
            }

            break;
    }

}