Question

我正在尝试使用JSON将数据库记录从android发送到服务器。 android代码工作正常（没有显示错误）。但是服务器页面中没有显示任何值。下面是android和php代码。

package com.example.income;





import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.*;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.IntentService;
import android.content.Intent;
import android.database.Cursor;
import android.util.*;;


public class Background extends IntentService
{   
 List<HashMap<String, String>> contacts = new ArrayList<HashMap<String, String>>();
HashMap<String, String> contact = new HashMap<String, String>();

public Background()
{
    super("This is the simple background class");
}

@Override
protected void onHandleIntent(Intent intent) 
{
    Log.v("message","This is simple background service");
    Db db =new Db(Background.this,"simple",null,3);
    Cursor c= db.getData();

    if(c.moveToFirst())
    {


        do
        {
            String num,dater;
            num = c.getString(c.getColumnIndex("phone_number"));
            dater =c.getString(c.getColumnIndex("date"));

            contact.put("contact", num);
            contact.put("date", dater);
            contacts.add(contact);
      }
        while (c.moveToNext());

        try {
            sendData();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    }

public void sendData() throws ClientProtocolException, IOException, JSONException 
{
    Log.v("Let's C","Will it go here?");

        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost("http://192.168.56.1/android.php");


        JSONArray array= new JSONArray(contacts);

        StringEntity se = new StringEntity(array.toString());
        httppost.setEntity(se);
        httppost.setHeader("Accept", "application/json");
        httppost.setHeader("Content-type", "application/json");


         HttpResponse response= httpclient.execute(httppost);
         HttpEntity entity=response.getEntity();

    if(entity!=null)
    {
        Log.i("response",EntityUtils.toString(entity));
    }

 }
}

Pho代码

$json = $_POST['HTTP_JSON'];
$data = json_decode($json,true);
print_r($data);

Answer 1

我建议您不要使用HttpClient，而是使用google自己的排球库，并在其getParams（）覆盖方法中返回您的hashmap列表。这样做非常容易。此外，您可以在其setHeader方法中设置标头。

将数据从Android服务发送到服务器

1 个答案: