Question

我正在尝试使用HttpURLConnection和PHP文件通过MYsql服务器获取数据。问题是连接没有建立和断开。你能帮我弄清一下缺少的部分吗？

编辑（已解决） - ＆gt;问题是我在Android主要活动中建立了互联网连接。我必须为背景互联网操作制作不同的Class。谢谢Neel的帮助。

注释：我做了下面的Toast测试，但它没有显示任何内容。我在清单文件中添加了Internet权限。我检查了我的日志，我发现＆＃34;＆＃34;错误关闭InputStream＆＃34;＆＃34;出现。

我的Java代码：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_cabinet_viewer);
    String reference = "GetCoreSites";
    String Myreturndata = operations(reference);
    test = (TextView) findViewById(R.id.testtxt);
    test.setText(Myreturndata);

 public String operations (String data){

    String coresiteurl = "http://127.0.0.1/webapp/coresitesquery.php";
    String reference = data;
    String corestemp = "test";
    String line = "";

    if (reference.equals("GetCoreSites")) {

        try {
            URL url = new URL(coresiteurl);
            HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoInput(true);
            InputStream IS = httpURLConnection.getInputStream();
            Log.i(TAG, "gettingstream");
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(IS, "iso-8859-1"));
            while ((line = bufferedReader.readLine()) != null) {
                corestemp+= line;
            }
            IS.close();
            bufferedReader.close();
            httpURLConnection.disconnect();
            return corestemp;

        } catch (MalformedURLException e) {
            Log.i(TAG, "Error closing InputStream");
            e.printStackTrace();
        } catch (IOException e) {
            Log.i(TAG, "Error closing InputStream");
            e.printStackTrace();
        }
    }

    return corestemp;
}

我的PHP文件：

<?php
require "init.php";
$query = mysqli_query($con,"SELECT core_site FROM core_sites");
$coresites = [];

while($row = mysqli_fetch_assoc($query)){
$coresites[] = $row['core_site'];
}

print_r($coresites);
?>

当我通过broswer访问我的php时，它正在工作并生成输出：

Array ( [0] => Abbasya [1] => Alex Auto [2] => Alex Post [3] => Banisweif [4] => Nasr City [5] => Ramsis TE [6] => Smart Village )

非常感谢您的支持：）

HttpURLConnection无法连接

0 个答案: