android使用HTTP協議讀取數據

package com.dailei.httpget;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new AsyncTask<String,Void,Void>() {

                    @Override
                    protected Void doInBackground(String... params) {
                        try {
                            URL uri = new URL(params[0]);
                            URLConnection conn = uri.openConnection();
                            InputStream inputStream = conn.getInputStream();
                            InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
                            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
                            String line;
                            while((line = bufferedReader.readLine()) != null) {
                                System.out.println(line);
                            }
                            bufferedReader.close();
                            inputStreamReader.close();
                            inputStream.close();
                        } catch (MalformedURLException e) {
                            e.printStackTrace();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                        return null;
                    }
                }.execute("http://fanyi.youdao.com/openapi.do?keyfrom=dailei&key=1339235580&type=data&doctype=xml&callback=show&version=1.1&q=API");
            }
        });
    }
}