Android学习第十七天----从网络上获取html代码

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="63dp"
        android:text="Button" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:ems="10" 
        android:text="http://192.168.1.20:8080/javawebhtml/">
    </EditText>

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/button1"
        android:layout_marginTop="59dp"
        android:text="TextView" />

</RelativeLayout>

package com.example.httphtml;

import java.io.IOException;
import com.will.service.HtmlService;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {
    private EditText edit;
    private Button mButton;
    private TextView text;
    private Handler handler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
        if (msg.what == 100) {
        text.setText((String) msg.obj);
        }

    }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    edit = (EditText) findViewById(R.id.editText1);
    mButton = (Button) findViewById(R.id.button1);
    text = (TextView) findViewById(R.id.textView1);
    mButton.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
        new Thread(new Runnable() {

            @Override
            public void run() {
            Message msg = new Message();
            msg.what = 100;
            byte[] b;
            try {
                b = HtmlService.getText(edit.getText().toString());
                msg.obj = new String(b);
                handler.sendMessage(msg);
            } catch (IOException e) {
                e.printStackTrace();
            }

            }
        }).start();

        }
    });
    }
}

package com.will.service;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class HtmlService {
    public static byte[] getText(String path) throws IOException
    {
    InputStream is = null;
    try {
        URL url = new URL(path);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setReadTimeout(5*1000);
        conn.setRequestMethod("GET");
        if(conn.getResponseCode() == 200)
        {
        is = conn.getInputStream();
        }
    } catch (MalformedURLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return getByte(is);
    }
    public static byte[] getByte(InputStream is) throws IOException
    {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    byte[] b = new byte[1024];
    int len = 0;
    while((len = is.read(b))!= -1)
    {
        baos.write(b, 0, len);
    }
    return baos.toByteArray();
    }
}