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Android 从url Alchemy获取json值_Android_Json_Alchemyapi - Fatal编程技术网

Android 从url Alchemy获取json值

Android 从url Alchemy获取json值,android,json,alchemyapi,Android,Json,Alchemyapi,我试图从android中与Alchemy API相关的url中获取json值,浏览器中的json答案是: { "status": "OK", "usage": "By accessing AlchemyAPI or using information generated by AlchemyAPI, you are agreeing to be bound by the AlchemyAPI Terms of Use: http://www.alchemyapi.com/compa

我试图从android中与Alchemy API相关的url中获取json值,浏览器中的json答案是:

{

 "status": "OK",

    "usage": "By accessing AlchemyAPI or using information generated by AlchemyAPI, you are agreeing to be bound by the AlchemyAPI Terms of Use: http://www.alchemyapi.com/company/terms.html",
    "url": "",
    "language": "english",
    "docSentiment": {
        "type": "negative",
        "score": "-0.423469"
    }
}
我在android中的代码是:

package com.example.daymanger;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.BufferedHttpEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONObject;

import android.app.Activity;
import android.os.Bundle;
import android.os.StrictMode;
import android.widget.TextView;
import android.widget.Toast;

public class Alchemy extends Activity {
    StringBuilder total;
    HttpClient httpclient;
    HttpPost httppost;
    JSONArray arr;
    ArrayList<NameValuePair> nameValuePairs;
    HttpResponse response;
    String thelangage;
    HttpEntity entity;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.alchemy);


        TextView al=(TextView)findViewById(R.id.alchemy_text);

        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);

        try
        {
            httpclient = new DefaultHttpClient();

            httppost = new HttpPost("myurl");
            try{
            nameValuePairs = new ArrayList<NameValuePair>();
            nameValuePairs.add(new BasicNameValuePair("type",thelangage));


            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
            response = httpclient.execute(httppost);



            if(response.getStatusLine().getStatusCode()==200)
            {

            entity=response.getEntity();
            if(entity !=null)
            {
                InputStream instream=entity.getContent();
            try {
                JSONObject jsonResponse = new JSONObject(convertStreamToString(instream));
                JSONArray ja = jsonResponse.getJSONArray("docSentiment");   

            JSONObject json_data = ja.getJSONObject(0);
            String mylang=json_data.getString("type");
            }
            catch(Exception e)
            {
                Toast.makeText(getBaseContext(), e.toString(),Toast.LENGTH_LONG).show();
            }
            }
            }
        }
        catch(Exception ex)
        {
        Toast.makeText(getBaseContext(), ex.toString(),Toast.LENGTH_LONG).show();
        }
    }catch(Exception e)
    {
        Toast.makeText(getBaseContext(), e.toString(),Toast.LENGTH_LONG).show();
    }
    }

    private static String convertStreamToString(InputStream is)
       {


   BufferedReader reader = new BufferedReader(new InputStreamReader(is));
   StringBuilder sb = new StringBuilder();
   String line = null;
   try
   {

   while ((line = reader.readLine()) != null) {
       sb.append(line + "\n");
   }
   }catch(IOException e)
   {

   }
   finally
   {
    try{
        is.close();
    }catch(IOException e)
    {

    }
    }return sb.toString();



       }

}
package com.example.daymanger;
导入java.io.BufferedReader;
导入java.io.IOException;
导入java.io.InputStream;
导入java.io.InputStreamReader;
导入java.util.ArrayList;
导入org.apache.http.HttpEntity;
导入org.apache.http.HttpResponse;
导入org.apache.http.NameValuePair;
导入org.apache.http.client.HttpClient;
导入org.apache.http.client.entity.UrlEncodedFormEntity;
导入org.apache.http.client.methods.HttpGet;
导入org.apache.http.client.methods.HttpPost;
导入org.apache.http.entity.BufferedHttpEntity;
导入org.apache.http.impl.client.DefaultHttpClient;
导入org.apache.http.message.BasicNameValuePair;
导入org.json.JSONArray;
导入org.json.JSONObject;
导入android.app.Activity;
导入android.os.Bundle;
导入android.os.StrictMode;
导入android.widget.TextView;
导入android.widget.Toast;
公共级炼金术扩展了活动范围{
总数;
HttpClient-HttpClient;
HttpPost-HttpPost;
JSONArray arr;
ArrayList名称值对;
HttpResponse响应;
弦长;
http实体;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
//TODO自动生成的方法存根
super.onCreate(savedInstanceState);
setContentView(R.layout.alchemy);
TextView al=(TextView)findViewById(R.id.alchemy_text);
StrictMode.ThreadPolicy policy=新建StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(策略);
尝试
{
httpclient=新的DefaultHttpClient();
httppost=新的httppost(“myurl”);
试一试{
nameValuePairs=新的ArrayList();
添加(新的BasicNameValuePair(“type”,thelangage));
setEntity(新的UrlEncodedFormEntity(nameValuePairs));
response=httpclient.execute(httppost);
if(response.getStatusLine().getStatusCode()==200)
{
entity=response.getEntity();
如果(实体!=null)
{
InputStream instream=entity.getContent();
试一试{
JSONObject jsonResponse=新的JSONObject(convertStreamToString(instream));
JSONArray ja=jsonResponse.getJSONArray(“doc”);
JSONObject json_data=ja.getJSONObject(0);
String mylang=json_data.getString(“type”);
}
捕获(例外e)
{
Toast.makeText(getBaseContext(),e.toString(),Toast.LENGTH_LONG).show();
}
}
}
}
捕获(例外情况除外)
{
Toast.makeText(getBaseContext(),例如toString(),Toast.LENGTH_LONG).show();
}
}捕获(例外e)
{
Toast.makeText(getBaseContext(),e.toString(),Toast.LENGTH_LONG).show();
}
}
私有静态字符串convertStreamToString(InputStream为)
{
BufferedReader reader=新的BufferedReader(新的InputStreamReader(is));
StringBuilder sb=新的StringBuilder();
字符串行=null;
尝试
{
而((line=reader.readLine())!=null){
sb.追加(第+行“\n”);
}
}捕获(IOE异常)
{
}
最后
{
试一试{
is.close();
}捕获(IOE异常)
{
}
}使某人返回字符串();
}
}

关键是我想在“doctouction”中获取“type”的值,但它不起作用,有人能帮我吗

doctouction
不是一个
JSONArray
它是一个
JOSNObject
JSONArray
用[(方括号)表示,
JSONObject
用{(大括号)表示

改变

JSONArray ja = jsonResponse.getJSONArray("docSentiment");

那就做吧

ja.getString("type");

Scott非常感谢it部门的工作人员—1因为a/没有定义
没有工作
b/没有发布任何日志/堆栈跟踪或其他与解决问题相关的信息。
ja.getString("type");