關於手機監聽不到Wi-Fi連接的原因 unknown ssid

最近做一個監聽wifi開啓、關閉、連接監聽的項目

手機設置中連接成功後 在代碼中監聽不到連接的哪一個Wi-Fi

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

1、手機定位服務(VIVO) 、位置信息（小米） 沒有開啓的時候，開啓wifi 連接成功之後，在廣播中也監聽不到；

2、開啓過程：

2-1 首先判斷用戶是否打開系統定位服務

/*判斷用戶是否打開系統定位服務*/
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 彈出對話框提醒；

2-3 開啓

private void startSettingLocationService() { Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); //可以在onActivityResult中根據該請求碼判斷用戶是否已經在設置頁面打開位置服務 startActivityForResult(intent, START_ACTIVITY_FOR_START_LOCATION_SERVICE); }

2-4 定位服務開啓與否提示
 

@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, "定位服務開啓成功", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(instance, "定位服務開啓失敗", Toast.LENGTH_SHORT).show();
            }

            break;
    }

}