如何在android studio上使用shimmer获取数据mysql

Question

​

​

当我在手机上运行时，它无法获取我数据库中的数据sql“无法获取菜单！请再试一次。”

下面是我的php代码：

<?php 

require_once "../include/Constants.php";

$conn = new mysqli(DB_HOST, DB_USER, DB_PASSWORD, DB_NAME);

    $stmt = $conn->prepare("SELECT id, name, description FROM newsfeed");

    $stmt->execute();

    $stmt->bind_result($id, $name, $description);

    $newsfeed = array(); 

    //traversing through all the result 
    while($stmt->fetch()){
        $temp = array();
        $temp['id'] = $id; 
        $temp['name'] = $name; 
        $temp['description'] = $description; 
        array_push($newsfeed, $temp);
    }

    //displaying the result in json format 
    echo json_encode($newsfeed);

Answer 1

你已经写了newsFeedDataList != null，而不是你应该写的

if (newsFeedDataList == null){
return ;
}