Android HttpURLConnection senden Parameter

Question

Ich verwendete HttpClient, aber jetzt ist veraltet, so jetzt möchte ich HttpURLConnection verwenden, aber ich kann nicht herausfinden, wie man es richtig verwendet.

Ich möchte zwei Strings per Post an ein PHP-Skript senden: ("Benutzername", "Passwort"). Wie kann ich das erreichen?

Answer 1

Da die NameValuePair veraltet ist. Versuchen Sie, diese

public String performPostCall(String requestURL, 
      HashMap<String, String> postDataParams) { 

     URL url; 
     String response = ""; 
     try { 
      url = new URL(requestURL); 

      HttpURLConnection conn = (HttpURLConnection) url.openConnection(); 
      conn.setReadTimeout(15000); 
      conn.setConnectTimeout(15000); 
      conn.setRequestMethod("POST"); 
      conn.setDoInput(true); 
      conn.setDoOutput(true); 


      OutputStream os = conn.getOutputStream(); 
      BufferedWriter writer = new BufferedWriter(
        new OutputStreamWriter(os, "UTF-8")); 
      writer.write(getPostDataString(postDataParams)); 

      writer.flush(); 
      writer.close(); 
      os.close(); 
      int responseCode=conn.getResponseCode(); 

      if (responseCode == HttpsURLConnection.HTTP_OK) { 
       String line; 
       BufferedReader br=new BufferedReader(new InputStreamReader(conn.getInputStream())); 
       while ((line=br.readLine()) != null) { 
        response+=line; 
       } 
      } 
      else { 
       response=""; 

      } 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 

     return response; 
    } 

....

private String getPostDataString(HashMap<String, String> params) throws UnsupportedEncodingException{ 
     StringBuilder result = new StringBuilder(); 
     boolean first = true; 
     for(Map.Entry<String, String> entry : params.entrySet()){ 
      if (first) 
       first = false; 
      else 
       result.append("&"); 

      result.append(URLEncoder.encode(entry.getKey(), "UTF-8")); 
      result.append("="); 
      result.append(URLEncoder.encode(entry.getValue(), "UTF-8")); 
     } 

     return result.toString(); 
    } 

EDIT

Wenn Sie die ArrayList<NameValuePair> für Parameter nicht benötigen, ist dies eine kürzere Lösung, die die Query-String mit Hilfe baut die Uri.Builder Klasse:

URL url = new URL("http://yoururl.com"); 
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection(); 
conn.setReadTimeout(10000); 
conn.setConnectTimeout(15000); 
conn.setRequestMethod("POST"); 
conn.setDoInput(true); 
conn.setDoOutput(true); 

Uri.Builder builder = new Uri.Builder() 
     .appendQueryParameter("firstParam", paramValue1) 
     .appendQueryParameter("secondParam", paramValue2) 
     .appendQueryParameter("thirdParam", paramValue3); 
String query = builder.build().getEncodedQuery(); 

OutputStream os = conn.getOutputStream(); 
BufferedWriter writer = new BufferedWriter(
      new OutputStreamWriter(os, "UTF-8")); 
writer.write(query); 
writer.flush(); 
writer.close(); 
os.close(); 

conn.connect();