HttpClient之网络请求数据

package httpclent.com.example.httpclent;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.google.gson.Gson;

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 java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what){
                case 0:
                    String ss = (String) msg.obj;
                    Gson gson = new Gson();
                    Info info = gson.fromJson(ss, Info.class);
                    final List<Info.DataBean.EssayBean> essay = info.getData().getEssay();
                    List<Info.DataBean.QuestionBean> question = info.getData().getQuestion();
                    for (int i = 0; i < question.size(); i++) {
                        String answer_title = question.get(i).getAnswer_title();
                        Toast.makeText(MainActivity.this, ""+answer_title, Toast.LENGTH_SHORT).show();
                    }
                    lv.setAdapter(new BaseAdapter() {
                        @Override
                        public int getCount() {
                            return essay.size();
                        }

                        @Override
                        public Object getItem(int position) {
                            return essay.get(position);
                        }

                        @Override
                        public long getItemId(int position) {
                            return 0;
                        }

                        @Override
                        public View getView(int position, View convertView, ViewGroup parent) {
                            convertView = View.inflate(MainActivity.this,R.layout.item,null);
                            TextView t = (TextView) convertView.findViewById(R.id.t);
                            t.setText(essay.get(position).getHp_title());
                            return convertView;
                        }
                    });

                    break;
            }
        }
    };
    private ListView lv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        lv = (ListView) findViewById(R.id.lv);
        new Thread(new Runnable() {
            @Override
            public void run() {
                //创建请求
                HttpClient httpClient = new DefaultHttpClient();
                //设置请求方式
                HttpGet httpGet = new HttpGet("http://v3.wufazhuce.com:8000/api/reading/index/?version=3.5.0&platform=android");
                try {
                    //关联
                    HttpResponse respoonse = httpClient.execute(httpGet);
                    //判断状态行状态吗是佛为200
                    if (respoonse.getStatusLine().getStatusCode()==200) {
                        //获取实体内容
                        InputStream content = respoonse.getEntity().getContent();
                        //读取
                        ByteArrayOutputStream outputStream =new ByteArrayOutputStream();
                        byte [] buffer =new byte[1024];
                        int len=0;
                        while((len=content.read(buffer))!=-1) {
                            outputStream.write(buffer, 0, len);

                        }
                        //读取完毕
                        String s = outputStream.toString();
                 //主线程更新UI
                        Message message = handler.obtainMessage(0, s);
                        message.sendToTarget();


                    }


                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }).start();

    }
}