Question

看起来像API 29上的整个NetworkInfo is deprecated。

因此，我正在寻找一种替代方法来检查网络是否已连接。例如。替代

connectivityManager.activeNetworkInfo?.isConnected == true

旁注：我知道现在有一个回调，但是我想同步获取此信息。另外，我当然知道，虽然我想获得它可能不是准确的信息。

Answer 1

这正在使用API 29：

connectivityManager.isDefaultNetworkActive

Answer 2

private function _get_datatables_query($table,$column_order='',$column_search='',$order1='',$field_arry='',$select='')
{
   if(!empty($select)) {
       $this->db->select($select);
   }
   $this->db->from($table);
   if (!empty($field_arry) && count($field_arry) > 0 && $table != '') {
       foreach ($field_arry as $key => $value) {
           $this->db->where($key, $value);
       }
   }
   $i = 0;
//        print_r($column_search);
   $names='';
//        echo $_POST['search']['value'];
   if(!empty($_POST['search']['value'])){
       $names = explode(' ',$_POST['search']['value']);
   }
//        print_r($names);
   foreach ($column_search as $key => $item) // loop column
   {
       if($_POST['search']['value']) // if datatable send POST for search
       {

           if($i===0) // first loop
           {
               $this->db->group_start(); // open bracket. query Where with OR clause better with bracket. because maybe can
combine with other WHERE with AND.
               if(count($names) > 1) {
                   $this->db->like("CONCAT(CONCAT('%',$item),'%')", $names[$key]);
               }else{
                   $this->db->or_like("CONCAT(CONCAT('%',$item),'%')",
$_POST['search']['value']);
               }
           }
           else
           {
               if(count($names) > 1) {
                   $this->db->or_like("CONCAT(CONCAT('%',$item),'%')", $names[$key]);
               }else{
                   $this->db->or_like("CONCAT(CONCAT('%',$item),'%')",
$_POST['search']['value']);
               }
           }

           if(count($column_search) - 1 == $i) //last loop
               $this->db->group_end(); //close bracket
       }
       $i++;
   }

   if(isset($_POST['order'])) // here order processing
   {
       $this->db->order_by($column_order[$_POST['order']['0']['column']],
$_POST['order']['0']['dir']);
   }
   else if(isset($order1))
   {
       $order = $order1;
       $this->db->order_by(key($order), $order[key($order)]);
   }
}

function get_datatables($table,$column_order='',$column_search='',$order1='',$field_array='',$join_array='',$select='')
{
   $this->_get_datatables_query($table,$column_order,$column_search,$order1,$field_array,$select);
//        $this->output->enable_profiler(TRUE);
   if($_POST['length'] != -1)
       $this->db->limit($_POST['length'], $_POST['start']);
   if (!empty($join_array) && count($join_array) > 0 && $table != '') {
       foreach ($join_array as $key => $value) {
           $this->db->join($key, $value);
       }
   }
   $query = $this->db->get();
   return $query->result();
}

该类已在API级别29中弃用。相反，您应该使用android.net.NetworkInfo API来了解连通性更改

参考链接https://developer.android.com/reference/android/net/NetworkInfo.html

ConnectivityManager.NetworkCallback

Answer 3

解决方案是这样的：

val capability = connectivityManager.getNetworkCapabilities(connectivityManager.activeNetwork)
return capability?.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) ?: false

Answer 4

解决方案是

public void registerNetworkCallback()
{
    try {
        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkRequest.Builder builder = new NetworkRequest.Builder();

        connectivityManager.registerNetworkCallback(builder.build(),new ConnectivityManager.NetworkCallback() {
                    @Override
                    public void onAvailable(Network network) {
                        Variables.isNetworkConnected = true; // Global Static Variable
                    }
                    @Override
                    public void onLost(Network network) {
                        Variables.isNetworkConnected = false; // Global Static Variable
                    }
                }

        );
        Variables.isNetworkConnected = false;
    }catch (Exception e){
        Variables.isNetworkConnected = false;
    }
}

在此处查看完整代码：Gist

Answer 5

private boolean checkInternetConnection(Activity activity) {
    ConnectivityManager connectivityManager = (ConnectivityManager) activity.getSystemService(Context.CONNECTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        Network network = null;
        if (connectivityManager == null) {
            return false;
        } else {
            network = connectivityManager.getActiveNetwork();
            NetworkCapabilities networkCapabilities = connectivityManager.getNetworkCapabilities(network);
            if (networkCapabilities == null) {
                return false;
            }
            if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) ||
                    networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
                return true;
            }
        }
    } else {
        if (connectivityManager == null) {
            return false;
        }
        if (connectivityManager.getActiveNetworkInfo() == null) {
            return false;
        }
        return connectivityManager.getActiveNetworkInfo().isConnected();
    }
    return false;
}

在API 29中不推荐使用ConnectivityManager.getActiveNetworkInfo（）/ NetworkInfo。有什么替代方法？

5 个答案: