android에서 php로 데이터 전송관련

Question

Spinner에서 데이터를 전송해서 받아오려고 합니다.

선택한 스피너의 값을 전송해서 php를 통해 json 데이터를 받아오는데

데이터값이 자꾸 전송이안되는거같네요...

java acitivity 에서 전송하는 부분입니다.

protected Void doInBackground(String... params) {

            String selectedItem = params[0].toString();
            ServiceHandler jsonParser = new ServiceHandler();
            
            
            try {
                //URL 설정, 접속
                URL url = new URL("접속URL");
                HttpURLConnection http = (HttpURLConnection)url.openConnection();
                
                //전송 모드 설정
                http.setDefaultUseCaches(false);
                http.setDoInput(true);  //서버에서 읽기모드 지정
                http.setDoOutput(true); //서버에서 쓰기모드지정
                http.setRequestMethod("POST");
                
                http.setRequestProperty("content-type", "application/json");
                
                //서버로 값 전송
                StringBuffer buffer = new StringBuffer();
                buffer.append("path1").append("=").append(selectedItem);
                
                OutputStreamWriter outStream = new OutputStreamWriter(http.getOutputStream(), "UTF-8");
                PrintWriter writer = new PrintWriter(outStream);
                writer.write(buffer.toString());
                writer.flush();
                
                String json = jsonParser.makeServiceCall(URL_DEP_RESULT, ServiceHandler.POST);
                Log.e("Dep_result json : ", "> "+json);
                
                if(json != null) {
                    try {
                        JSONObject jsonObj = new JSONObject(json);
                        if(jsonObj != null) {
                            JSONArray dep_result = jsonObj.getJSONArray("dep_result");
                            
                            for(int i=0; i<dep_result.length(); i++) {
                                JSONObject dep_resObj = (JSONObject)dep_result.get(i);
                                Dep_result dep_res = new Dep_result(dep_resObj.getString("dep_file"));
                                fileList.add(dep_res);
                            }
                        }
                    } catch(JSONException e) {
                        Log.e("Json Error : ", e.toString());
                    }
                } else {
                    Log.e("Depfile if Error : ", "IF ERROR");
                }
                
            } catch(Exception e) {
                e.printStackTrace();
            }
            return null;

php 부분입니다.

<?php
    
    $path1 = $_POST["path1"];
    
    function getPath2List($path1) {
        
        $dir="01/".$path1;
        
        $files = scandir($dir);
        $file_path = array();
        
        $file_path["dep_result"] = array();
            
        foreach($files as $ind_file) {
            if($ind_file != '.' && $ind_file !='..'){
                
                if(substr($ind_file,0,2) == "20") {
                
                    if($path1 == "") {
                        $tmp = array();
                        $tmp["dep_file_nopath"] = $ind_file;
                    } else {
                        $tmp = array();
                        $tmp["dep_file"] = $ind_file;
                    }
                }
            array_push($file_path["dep_result"], $tmp);
            
            }
        }
        
        header('Content-Type: application/json');
    
        echo json_encode($file_path);
        
    }
    getPath2List($path1);

?>

위에 보시면 테스트용으로 받아오는 $path1이 없을때 json 데이터가 출력이 됩니다. 아직초보라 좀알려주세요ㅠㅠ