Android 应用程序 JSON 正在解析

Question

我正在尝试解析从我的 android 应用程序中链接的 URL 收到的 JSON。我想将此数据输出到我的应用程序中的 TextViews。源代码如下。

目前 JSON 在应用程序中的显示方式

[
  {
    "IndividualID": 1,
    "FullName": "Sean Kelly",
    "DOB": "07/06/1987",
    "MedicalHistory": "Ulcerative Colitis",
    "Medication": "Asacolon",
    "Alergies": "Penicillin"
  }
]

Fragment2.java（注释掉的部分是我尝试解析但没有显示的地方）

package ie.itsligo.medication;

import java.io.IOException;
import java.io.InputStream;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class Fragment2 extends Fragment {

    TextView txtId;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.fragment2_layout, container, false);

        new LongRunningGetIO().execute();

        return view;
    }

private class LongRunningGetIO extends AsyncTask <Void, Void, String> {

        protected String getASCIIContentFromEntity(HttpEntity entity) throws IllegalStateException, IOException {
           InputStream in = entity.getContent();
             StringBuffer out = new StringBuffer();
             int n = 1;
             while (n>0) {
                 byte[] b = new byte[4096];
                 n =  in.read(b);
                 if (n>0) out.append(new String(b, 0, n));
             }
             return out.toString();
        }

        @Override
        protected String doInBackground(Void... params) {
             HttpClient httpClient = new DefaultHttpClient();
             HttpContext localContext = new BasicHttpContext();
             HttpGet httpGet = new HttpGet("https://api.myjson.com/bins/363s3");
             String text = null;
             try {
                   HttpResponse response = httpClient.execute(httpGet, localContext);
                   HttpEntity entity = response.getEntity();
                   text = getASCIIContentFromEntity(entity);
             } catch (Exception e) {
                 return e.getLocalizedMessage();
             }
             return text;
        }   

        protected void onPostExecute(String results) {
            if (results!=null) {

                txtId = (TextView) getView().findViewById(R.id.txtId);
                txtId.setText(results);

                /*JSONObject jObj;
                try {
                    jObj = new JSONObject();
                    JSONArray jArr = jObj.getJSONArray(results);
                    for (int i=0; i < jArr.length(); i++){
                        JSONObject obj = jArr.getJSONObject(i);
                        String fullname = obj.getString("FullName");
                        txtId = (TextView) getView().findViewById(R.id.txtId);
                        txtId.setText(fullname+"");
                    }
                } catch (JSONException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }*/
            }
        }
    }
}

Answer 1

您可以使用 GSON 库在 Android 中进行 JSON 解析。你可以这样解析这个JSON：

List<YourObject> listOfYourObject = new Gson().fromJson(results, new TypeToken<List<YourObject>>() {}.getType());

在 YourObject 中准确定义字段在响应中的位置，或者您可以使用 @SerializedName 批注并根据需要命名字段。

Answer 2

您可以使用 Android SDK 中提供的 JSON 数组和 JSON 对象类。加载 JSON 字符串后，您可以将其解析为：

    JSONArray myJSONArray=new JSONArray(jsonString); 
//jsonString contains your JSON loaded 
//from the Internet probably.

    for(int i=0;i<myJSONArray.length();i++){
        JSONObject obj=(JSONObject) myJSONArray.get(i);
        //Now you can access your data here.
          String individualID=obj.getString("IndividualID");//get value by key
          String fullName=obj.getString("FullName");
          //.... similarly get other values and assign them to your views accordingly.
    }

希望对您有所帮助。

Android 应用程序 JSON 正在解析

Android App JSON Parsing

url

parsing

android

json

textview