如何在Android Studio中使用HTTP POST

Question

我正在尝试在Android工作室中使用与来检索值进行HTTP POST。我已经在 POSTMAN 中测试了这个东西，但我不确定如何在 Android 工作室中输入它。请协助我为此创建 HTTP POST 代码。

我正在开机自检

ml2.internalpositioning.com/track

与这个身体

{"username":"fyp","location":"location","group":"cowardlycrab","time":1501640084739,"wifi-fingerprint":[{"mac":"04:c5:a4:66:43:7k","rssi":-29}]}

Answer 1

//call asynctask  like below : 
JSONObject post_dict = new JSONObject();
try {
post_dict.put("username", "your_username_data");
post_dict.put("location", "your_location_data");
post_dict.put("group", "your_group_data");
post_dict.put("time", "your_time_data");
JSONArray jarr = new JSONArray();
JSONObject jonj = new JSONObject();
jonj.put("mac","your_mac_data");
jonj.put("rssi","your_rssi_data");
jarr.put(jonj);
post_dict.put("wifi-fingerprint", jarr);
} catch (JSONException e) {
e.printStackTrace();
}
new YourAsyncTask().execute(String.valueOf(post_dict));

//Actual Async Task Class 
public class YourAsyncTask extends AsyncTask<String, String, String> {
ProgressDialog progressDialog;
protected void onPreExecute() {
progressDialog = ProgressDialog.show(MainActivity.this,
"Please Wait...",
"Registering Device");
super.onPreExecute();
}
protected String doInBackground(String... params) {
String JsonResponse = null;
String JsonDATA = params[0];
HttpURLConnection urlConnection = null;
BufferedReader reader = null;
try {
URL url = new URL("ml2.internalpositioning.com/track");
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setDoOutput(true);
// is output buffer writter
urlConnection.setRequestMethod("POST");
urlConnection.setRequestProperty("Content-Type", "application/json");
urlConnection.setRequestProperty("Accept", "application/json");
//set headers and method
Writer writer = new BufferedWriter(new OutputStreamWriter(urlConnection.getOutputStream(), "UTF-8"));
writer.write(JsonDATA);
// json data
writer.close();
InputStream inputStream = urlConnection.getInputStream();
//input stream
StringBuffer buffer = new StringBuffer();
if (inputStream == null) {
// Nothing to do.
return null;
}
reader = new BufferedReader(new InputStreamReader(inputStream));
String inputLine;
while ((inputLine = reader.readLine()) != null)
buffer.append(inputLine + "n");
if (buffer.length() == 0) {
// Stream was empty. No point in parsing.
return null;
}
JsonResponse = buffer.toString();
//response data
try {
//send to post execute
return JsonResponse;
} catch (Exception e) {
e.printStackTrace();
}
return null;
} catch (IOException e) {
e.printStackTrace();
} finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
if (reader != null) {
try {
reader.close();
} catch (final IOException e) {
}
}
}
return null;
}
@Override
protected void onPostExecute(String result) {
if (progressDialog != null)
progressDialog.dismiss();
super.onPostExecute(result);
//Do something with result
}
}

Answer 2

我也尝试发送HTTP帖子。 我从上面获取代码 并针对我的情况进行更改。 但不幸的是，有些不对劲。

我想将日期发送到我的雅马哈 AV 接收器 RX-A1080。 有一个Web界面，我用它记录HTTP POST命令 在火狐浏览器中。 Firefox 浏览器还以紧凑的 CURL 命令语法提供数据，因此 您可以在以下行中更好地看到 HTTP POST 命令的数据：

(as a CURL Command)
curl 
'http://192.168.0.24/YamahaRemoteControl/ctrl' 
-H 'User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0' 
-H 'Accept: */*' 
-H 'Accept-Language: de,en-US;q=0.7,en;q=0.3' 
--compressed 
-H 'Referer: http://192.168.0.24/Setup/' 
-H 'Content-Type: text/xml' 
-H 'Connection: keep-alive' 
--data '<?xml version="1.0" encoding="utf-8"?><YAMAHA_AV cmd="PUT"><System><Speaker_Preout><Pattern_1><PEQ><Manual_Data><Front_L><Band_7><Q>0.500</Q></Band_7></Front_L></Manual_Data></PEQ></Pattern_1></Speaker_Preout></System></YAMAHA_AV>'

我用以下方法转换它： https://curl.trillworks.com/#json 并得到这个：

{
"url":"http://192.168.0.24/YamahaRemoteControl/ctrl",
"raw_url":"http://192.168.0.24/YamahaRemoteControl/ctrl",
"method":"post",
"headers":
{
"User-Agent":"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) 
Gecko/20100101 Firefox/62.0",
"Accept":"*/*",
"Accept-Language":"de,en-US;q=0.7,en;q=0.3",
"Referer":"http://192.168.0.24/Setup/",
"Content-Type":"text/xml",
"Connection":"keep-alive"
},
"data":
{
"<?xml version":""1.0" encoding="utf-8"?><YAMAHA_AV cmd="PUT"> 
<System><Speaker_Preout><Pattern_1><PEQ><Manual_Data><Front_L><Band_7><Q>0.500</Q></Band_7></Front_L></Manual_Data></PEQ></Pattern_1></Speaker_Preout></System></YAMAHA_AV>"
}
}

我编写的代码是这样的： (我不确定 JSONObject 数据中是否有很多斜杠???(

// Gesamt JSON Object
JSONObject post_dict = new JSONObject();
try {
post_dict.put("url", "http://192.168.0.24/YamahaRemoteControl/ctrl");
post_dict.put("raw_url", "http://192.168.0.24/YamahaRemoteControl/ctrl");
post_dict.put("method", "post");
// headers - JSON Object ////////////////////////////////////////////
JSONObject headers = new JSONObject();
headers.put("User-Agent","Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0");
headers.put("Accept","*/*");
headers.put("Accept-Language","de,en-US;q=0.7,en;q=0.3");
headers.put("Referer","http://192.168.0.24/Setup/");
headers.put("Content-Type","text/xml");
headers.put("Connection","keep-alive");
post_dict.put("headers", headers);
// data - JSON Object ////////////////////////////////////////////
JSONObject data = new JSONObject();
data.put("<?xml version","\"1.0\" encoding=\"utf-8\"?><YAMAHA_AV cmd=\"PUT\"><System><Speaker_Preout><Pattern_1><PEQ><Manual_Data><Front_L><Band_7><Gain><Val>-200</Val><Exp>1</Exp><Unit>dB</Unit></Gain></Band_7></Front_L></Manual_Data></PEQ></Pattern_1></Speaker_Preout></System></YAMAHA_AV>");
post_dict.put("data", data);
} catch (JSONException e) {
e.printStackTrace();
}
new YourAsyncTask().execute(String.valueOf(post_dict));

有人可以说我怎么了：-(

有关Firefox完成的录制命令的更多信息 您可以看到以下行。(但它们类似于 CURL 命令(

New Request
============
POST http://192.168.0.24/YamahaRemoteControl/ctrl
Request-Header:
===============
Host: 192.168.0.24
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0
Accept: */*  
Accept-Language: de,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: http://192.168.0.24/Setup/
Content-Type: text/xml
Content-Length: 272
Connection: keep-alive
Request-Body:
=============
<?xml version="1.0" encoding="utf-8"?>
<YAMAHA_AV cmd="PUT">
<System>
<Speaker_Preout>
<Pattern_1>
<PEQ>
<Manual_Data>
<Front_L>
<Band_7>
<Gain>
<Val>-10</Val>
<Exp>1</Exp>
<Unit>dB</Unit>
</Gain>
or
<Freq>1.26 kHz</Freq>
or
<Q>0.500</Q>
</Band_7>
</Front_L>
</Manual_Data>
</PEQ>
</Pattern_1>
</Speaker_Preout>
</System>
</YAMAHA_AV>

Answer 3

我的错误是我的数据不是 json 对象。 我只需要将"数据"作为字符串发送。 然后它工作;-(