我用来在下面的JSONArray中显示表值的代码send_data.php
<?php
include 'dbconfig.php';
$con = new mysqli($servername, $username, $password, $dbname);
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$query = "select id,ask from pertanyaan";
$result = mysqli_query($con,$query);
$rows = array();
while($r = mysqli_fetch_array($result)) {
$rows[] =$r;
}
echo json_encode(array_values($rows));
mysqli_close($con);
?>
JSONArray的输出就像this
[{"0":"1","id":"1","1":"pertanyaan ke 1","ask":"pertanyaan ke 1"},{"0":"2","id":"2","1":"pertanyaan ke 2","ask":"pertanyaan ke 2"},{"0":"3","id":"3","1":"pertanyaan ke 3","ask":"pertanyaan ke 3"},{"0":"4","id":"4","1":"pertanyaan ke 4","ask":"pertanyaan ke 4"},{"0":"5","id":"5","1":"pertanyaan ke 5","ask":"pertanyaan ke 5"}]但是每次我尝试在Android上显示该URL时，我都会收到一条错误消息：
Value <html><body<>script of type java.lang.String cannot be converted to JSONArray但是当我在android studio中创建具有相同输出here的新API时，它的工作正常，
我使用错误的代码从PHP编码JSON吗？
最佳答案
问题HttpURLConnection不支持JavaScript，但是使用JavaScript生成了所需的cookie。
你的来电
String reqUrl = "http://zxccvvv.cuccfree.com/send_data.php";
URL url = new URL(reqUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
失败，因为缺少cookie
__test。固定
乍一看JavaScript源，对于给定的URL，cookie似乎是恒定的，因此设置恒定的cookie可能就足够了：
String cookie = "__test=2bf7c15501c0ec57f8e41cb84871a69c";
URL url = new URL(reqUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(7000);
conn.setRequestMethod("GET");
conn.setRequestProperty("Cookie", cookie);
备选方案：使用WebView可以抓取cookie，因此这是首选方法，因为如果cookie更改并且时间不多，它也不会损坏：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getCookie();
if(cookie!=null) {
new GetContacts().execute();
}
}
private void getCookie(){
CookieManager.setAcceptFileSchemeCookies(true);
WebView wv = new WebView(getApplicationContext());
wv.getSettings().setJavaScriptEnabled(true);
wv.loadUrl(url);
cookie = CookieManager.getInstance().getCookie("zxccvvv.cuccfree.com");
}
并按照上面的示例进行设置：
conn.setRequestProperty("Cookie", cookie);
在logcat中输出
Response from url: [{"0":"1","id":"1","1":"pertanyaan ke 1","ask":"pertanyaan ke 1"},{"0":"2","id":"2","1":"pertanyaan ke 2","ask":"pertanyaan ke 2"},{"0":"3","id":"3","1":"pertanyaan ke 3","ask":"pertanyaan ke 3"},{"0":"4","id":"4","1":"pertanyaan ke 4","ask":"pertanyaan ke 4"},{"0":"5","id":"5","1":"pertanyaan ke 5","ask":"pertanyaan ke 5"}]
关于php - ANDROID＆PHP-如何使用PHP从MySql显示JSONArray，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/40200789/