问题描述

为什么我用httpclient访问不到网络呢

public class MainActivity extends Activity {

public static final int SHOW_RESPONSE=1;
TextView text;

private Handler handler=new Handler();
public void handleMessage(Message msg){
    switch(msg.what){
    case SHOW_RESPONSE:
        String response=(String)msg.obj;
        text.setText(response);
    }
}
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button button=(Button)findViewById(R.id.button);
    text=(TextView)findViewById(R.id.text);
    button.setOnClickListener(new OnClickListener(){
        public void onClick(View v){
            sendRequestWithHttpClient();

        }
    });
}
private void sendRequestWithHttpClient(){
    Toast.makeText(MainActivity.this,"发出服务器请求", Toast.LENGTH_SHORT).show();
    new Thread(new Runnable(){
        public void run(){
            try{
                HttpClient httpClient=new DefaultHttpClient();

// HttpGet httpGet=new HttpGet("http://v5.pc.duomi.com/search-ajaxsearch-searchall?kw=jackson&pi=1&pz=5");
HttpGet httpGet=new HttpGet("http://www.baidu.com");
HttpResponse httpResponse=httpClient.execute(httpGet);
if(httpResponse.getStatusLine().getStatusCode()==200){
Toast.makeText(MainActivity.this,"请求响应成功", Toast.LENGTH_SHORT).show();
HttpEntity entity=httpResponse.getEntity();
String response=EntityUtils.toString(entity,"utf-8");

                    Message message=new Message();
                    message.what=SHOW_RESPONSE;
                    message.obj=response.toString();
                    handler.sendMessage(message);

// parseJSONWithJSONObject(response);
}
}catch(Exception e){
e.printStackTrace();
}
}
}).start();
}

解决方案

http://www.cnblogs.com/freeliver54/archive/2011/12/28/2304836.html

解决方案二：

访问不到网络具体什么问题？把错误描述清楚下

解决方案三：

HttpClient对比HttpUrlConnection有比较丰富的api，但是不利于扩展和升级，加上android团队在优化HttpClient方面并不积极。
我比较倾向使用HttpUrlConnection,下面还是把两种访问网络的方法列出来以作比较。
HttpClient:
public String httpGet(String url, String params) throws......
答案就在这里：访问网络之HttpClient和HttpUrlConnection