07-网络与通信-02-Android中基于HTTP的通信技术

---

---

02-Android中基于HTTP的通信技术

　　MainActivity.java:

---

package com.jikexueyuan.httpget;

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;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.button1).setOnClickListener(new View.OnClickListener() {
            
            @Override
            public void onClick(View arg0) {
                new AsyncTask<String, Void, Void>(){

                    @Override
                    protected Void doInBackground(String... params) {
                        try {
                            URL url = new URL(params[0]);
                            URLConnection connection = url.openConnection();
                            InputStream is = connection.getInputStream();
                            InputStreamReader isr = new InputStreamReader(is,"utf-8");
                            BufferedReader br = new BufferedReader(isr);
                            String line;
                            while((line = br.readLine()) != null){
                                System.out.println(line);
                            }
                            br.close();
                            isr.close();
                            is.close();
                        } catch (MalformedURLException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                        
                        return null;
                    }
                    
                }.execute("http://fanyi.youdao.com/openapi.do?keyfrom=testHttpGet&key=850021564&type=data&doctype=xml&version=1.1&q=good");
            }
        });
    }

}

activity_main.xml:

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.jikexueyuan.httpget.MainActivity"
    tools:ignore="MergeRootFrame" >

    <Button
        android:id="@+id/button1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="读取数据" />

</FrameLayout>