Question

我正在尝试使用适用于Android的Google Places API，但每当我尝试运行我的应用程序时，都会收到此错误：

04-19 18:27:16.094: E/AndroidRuntime(531): Caused by: java.lang.NoClassDefFoundError: com.google.api.client.http.javanet.NetHttpTransport
04-19 18:27:16.094: E/AndroidRuntime(531):  at com.android.FoodFinder.MainActivity.<clinit>(MainActivity.java:38)

这是我的代码

package com.android.FoodFinder;


import java.io.IOException;

import com.google.api.client.http.GenericUrl;
import com.google.api.client.http.HttpRequest;
import com.google.api.client.http.HttpRequestFactory;
import com.google.api.client.http.HttpRequestInitializer;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.http.json.JsonHttpParser;
import com.google.api.client.json.jackson.JacksonFactory;

import android.app.ListActivity;
import android.content.Context;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends ListActivity
{

    private float distance;
    private Location location;
    private double latitude;
    private double longitude;
    private static String keyString = "0JVolnSwRg8xLH0J6d9rUwQH-e770dlWn3kcRuA";
    private static String urlString = "https://maps.googleapis.com/maps/api/place/search/json?";
    private static final HttpTransport transport = new NetHttpTransport();

    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);

        location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

        if(location == null)
        {
            latitude = 0;
            longitude = 0;
        }
        else
        {
            latitude = location.getLatitude();
            longitude = location.getLongitude();
        }

        final EditText distanceEdit = (EditText)findViewById(R.id.distance);

        final Button confirm = (Button)findViewById(R.id.confirm);
        confirm.setOnClickListener(new View.OnClickListener(){
            public void onClick(View v)
            {
                try
                {
                    distance = Float.parseFloat(distanceEdit.getText().toString());
                    search(distance);                   
                }
                catch(Exception e)
                {
                    e.printStackTrace();
                }
            }
        });
    }

    private void search(float d) throws IOException
    {
        HttpRequestFactory hrfactory = createRequestFactory(transport);
        HttpRequest request = hrfactory.buildGetRequest(new GenericUrl(urlString));
        request.getUrl().put("key", keyString);
        request.getUrl().put("location", latitude + ", " + longitude);
        request.getUrl().put("types", "restaurant");
        request.getUrl().put("radius", distance);
        request.getUrl().put("sensor", "false");

    }

    private static HttpRequestFactory createRequestFactory(final HttpTransport transport)
    {
        return transport.createRequestFactory(new HttpRequestInitializer()
        {

            public void initialize(HttpRequest request) throws IOException 
            {
                request.addParser(new JsonHttpParser(new JacksonFactory()));
            }
        });
    }

}

错误发生在：

private static final HttpTransport transport = new NetHttpTransport();

我已将以下jar文件添加到构建路径中：

共享记录-1.1.1
谷歌-HTTP-客户1.8.3-β
谷歌-HTTP-客户android2-1.8.3-β
谷歌-HTTP-客户android3-1.8.3-β
谷歌-HTTP-客户应用服务引擎-1.8.3-β
谷歌OAuth的客户1.8.0-β
GSON-2.1
番石榴-R09
番石榴11.0.2
的HttpClient-4.0.3
的HttpCore-4.0.1
杰克逊核-ASL-1.9.4
JDO2-API-2.3-EB
JSON-20080701
jsr305-1.3.9
的junit-4.8.2
的protobuf-java的2.2.0
交易API-1.1
xpp3-1.1.4c
谷歌-API的客户端 - 1.8.0-β
谷歌-API的客户端应用服务引擎-1.8.0-β
谷歌-API的客户端 - servlet的1.8.0

但我仍然设法得到NoClassDefFoundExeception。我做错了什么？

Answer 1

我认为问题在于添加Jars，试试这个在根名称/ libs（不是/ lib）和Project =＆gt;创建一个文件夹。属性=＆gt; Java Build Path =＆gt; Libraries =＆gt;添加JAR ......

您可以找到更多帮助here和here

Answer 2

我正在使用比你更新的google-http-client-1.11.0 beta.jar（NetHttpTransport），它运行正常，试一试。

java.lang.NoClassDefFoundError：com.google.api.client.http.javanet.NetHttpTransport

2 个答案: