从Android向php服务器发送数据

Question

我正在尝试从Android向我的php服务器提交数据。然而，所有的答案似乎都使用了不推荐使用的ApacheHTTP库。我不想用它，当我试着用的时候，它不起作用。

现在它似乎什么也没做。它似乎连接到web服务器，但服务器不写入任何数据。如果我只是用浏览器访问url，它会写入一个文件。

php代码是

<?php
// get the "message" variable from the post request
// this is the data coming from the Android app
$message=$_POST["message"]; 
// specify the file where we will save the contents of the variable message
$filename="androidmessages.html";
// write (append) the data to the file
file_put_contents($filename,$message."<br />",FILE_APPEND);
// load the contents of the file to a variable
$androidmessages=file_get_contents($filename);
// display the contents of the variable (which has the contents of the file)
echo $androidmessages;
?>

然后在Android studio中，我会在按下按钮后放入所有代码

    loginButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            loadingProgressBar.setVisibility(View.VISIBLE);
            loginViewModel.login(usernameEditText.getText().toString(),
                    passwordEditText.getText().toString());


            System.out.println("This is a test");

            Thread thread = new Thread(new Runnable() {

                @Override
                public void run() {
                    try  {
                        //Your code goes here

                        URL url = null;
                        OutputStream out = null;
                        String urlString = "https://mywebsite.net/php_script.php";
                        String data = "HelloWorld"; //data to post

                        try {
                            url = new URL(urlString);
                            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
                            urlConnection.setRequestMethod("POST");
                            urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
                            urlConnection.setDoOutput(true);
                            out = new BufferedOutputStream(urlConnection.getOutputStream());
                            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out, "UTF-8"));
                            writer.write(data);
                            writer.flush();
                            writer.close();
                            out.close();
                            urlConnection.connect();

                        } catch (IOException e) {
                            System.out.println(e.getMessage());
                            e.printStackTrace();
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            });
            thread.start();

        }
    });
}

Answer 1

你可以使用JSON和Volley！

<?php
$data = json_decode(file_get_contents('php://input'), true);
$filename="androidmessages.html";
file_put_contents($filename,$data["message"]."<br />",FILE_APPEND);
$reponse = array("message" => $androidmessages=file_get_contents($filename));
echo json_encode($reponse);
?>

在android（Kotlin）中：

private fun sendHtmlRequest(view: View){
    val jsonobj = JSONObject()
    var url = "https://URL.php"

    jsonobj.put("message", "test message")

    val que = Volley.newRequestQueue(context)
    val req = JsonObjectRequest(Request.Method.POST, url, jsonobj,
        Response.Listener { response: JSONObject ->
            val messageResponse = response.getString("message")
            println("response: $messageResponse")
        }, Response.ErrorListener{
            println("Error")
        }
    )

    que.add(req)
}

Answer 2

您的PHP代码正在$\u POST中查找名为“message”的变量

$message=$_POST["message"]; 

然而，在Android代码中，您只需将消息数据写入http请求主体。

我建议研究Volley，它是一个HTTP库，允许轻松地发出HTTP请求。这个答案可能也会有所帮助。