从android发送数据到php并检索它

我想从我的android应用程序发送数据到我的php代码并检索它，但是当我在我的网站上打印值时，它们显示值为空。一些我曾尝试为Android的例子是：从android发送数据到php并检索它

OutputStream os = null; 
     InputStream is = null; 
     HttpURLConnection conn = null; 
     try { 
      //constants 
      URL url = new URL(tempURL); 
      JSONObject jsonObject = new JSONObject(); 
      jsonObject.put("message", "message"); 
      jsonObject.put("password", "password"); 
      String message = jsonObject.toString(); 
      Toast.makeText(this, "message = " + message, Toast.LENGTH_SHORT).show(); 

      conn = (HttpURLConnection) url.openConnection(); 
      conn.setReadTimeout(10000 /*milliseconds*/); 
      conn.setConnectTimeout(15000 /* milliseconds*/); 

      conn.setRequestMethod("POST"); 
      conn.setDoInput(true); 
      conn.setDoOutput(true); 
      conn.setFixedLengthStreamingMode(message.getBytes().length); 

      //make some HTTP header nicety 
      conn.setRequestProperty("Content-Type", "application/json;charset=utf-8"); 
      conn.setRequestProperty("X-Requested-With", "XMLHttpRequest"); 

      //open 
      conn.connect(); 

      //setup send 
      os = new BufferedOutputStream(conn.getOutputStream()); 
      os.write(message.getBytes()); 
      //clean up 
      os.flush(); 

      //do something with response 
      is = conn.getInputStream(); 
      //String contentAsString = readIt(is,len); 
     } catch (IOException | JSONException e) { 
      e.printStackTrace(); 
     } finally { 
      //clean up 
      try { 
       os.close(); 
       is.close(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
      conn.disconnect(); 
     }

另一条是：

HttpClient httpclient = new DefaultHttpClient(); 
      HttpPost httppost = new HttpPost("http://samplewebsite.com/welcome.php"); 
      try { 
       List<NameValuePair> nameValuePairs = new ArrayList<>(2); 
       nameValuePairs.add(new BasicNameValuePair("state", "state")); 
       nameValuePairs.add(new BasicNameValuePair("tag", "tag")); 
       Toast.makeText(this, "nameValuePairs = " + nameValuePairs, Toast.LENGTH_LONG).show(); 
       httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 
       httpclient.execute(httppost); 
//    msgTextField.setText(""); // clear text box 
      } catch (ClientProtocolException e) { 
       // TODO Auto-generated catch block 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
      }

一些我已经在PHP尝试的代码是：

print_r("tag = " + $_POST['tag']);

而且

$json = file_get_contents('php://input'); 
$obj = json_decode($json); 
$tag = $obj->{'tag'}; 
$state = $obj->{'state'};

请帮助我，这些考试都没有ples为我制定了。任何解决方案都会有帮助。谢谢！

来源

2017-02-21 Shreshth Kharbanda

你是否在任何地方托管你的PHP代码？你有什么错误吗？我不知道你是否在使用另一个线程，但对于初学者来说，如果你不把它放在后台线程上，你的应用程序应该会崩溃。 – Rafa

向我们展示了如何在'welcome.php'中处理帖子 –

您应该使用REST控制台在Android以外的第一个地方进行测试，以便知道它在服务器端运行。之后，您可以调试客户端。 –

我发现了如何发送数据的代码从机器人到PHP：

InputStream inputStream = null; 
     String result = ""; 
     String url = [YOUR URL HERE]; 

     try { 
      HttpClient httpclient = new DefaultHttpClient(); 
      HttpPost httpPost = new HttpPost(url); 
      String json1 = ""; 
      JSONObject jsonObject = new JSONObject(); 
      jsonObject.accumulate("key", message); 

      json1 = jsonObject.toString(); 
      StringEntity se = new StringEntity(json1); 
      httpPost.setEntity(se); 
      httpPost.setHeader("Accept", "application/json"); 
      httpPost.setHeader("Content-type", "application/json"); 
      HttpResponse httpResponse = httpclient.execute(httpPost); 

      inputStream = httpResponse.getEntity().getContent(); 

      // 10. convert inputstream to string 
      if (inputStream != null) { 
       result = convertInputStreamToString(inputStream); 
       myJSON = result; 
      } else { 
       result = "Did not work!"; 
      } 
     } catch (Exception e) { 
       Log.d("InputStream", e.getLocalizedMessage()); 
}

的方法convertInputStreamToString的代码是：

private static String convertInputStreamToString(InputStream inputStream) throws IOException { 
    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream)); 
    String line = ""; 
    String result3 = ""; 
    while ((line = bufferedReader.readLine()) != null) 
     result3 += line; 

    inputStream.close(); 
    return result3; 
}

我的PHP代码，收到来自Android的数据是：

$json = file_get_contents('php://input'); 
$obj = json_decode($json); 
echo $obj->{'key'};

希望它有帮助！

来源

2017-03-09 01:33:39

从android发送数据到php并检索它

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