HttpGet

public class MainActivity extends AppCompatActivity {

    private Handler myHanlder=new Handler(){
        @Override
        public void handleMessage(Message msg) {
            tvShow.setText(msg.obj.toString());
        }
    };

    private TextView tvShow;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tvShow = (TextView) findViewById(R.id.tvshow);

        //新开一个子线程
        new Thread(){
            @Override
            public void run() {
                getWebData();

            }
        }.start();

    }
    public void getWebData(){

        try {
            //1.创建一个HttpClient
            HttpClient hc=new DefaultHttpClient();
            //2.创建HttpGet对象
            HttpGet hg=new HttpGet("http://japi.juhe.cn/joke/content/list.from?key=0e1e9432863ab32234c5a22ab5602437&page=2&pagesize=10&sort=asc&time=1418745237");

            //3.执行
            HttpResponse response=hc.execute(hg);

            //4.判断返回码
            int code=response.getStatusLine().getStatusCode();
            if(code==200){
                //5.得到结果
                HttpEntity result=response.getEntity();

                //转换成string类型
                String str=EntityUtils.toString(result);

                //发送数据
                Message msg=Message.obtain();
                msg.obj=str;
                myHanlder.sendMessage(msg);

            }

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

    }
}