网页源代码查看器

1、编写activity_main.xml

<LinearLayout 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"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <EditText
        android:id="@+id/et"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"/>

    <Button
        android:onClick="click"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="查看" />
    <ScrollView 
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        >
        <TextView 
            android:id="@+id/tv"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"            />
    </ScrollView>
</LinearLayout>

2、编写MainActivity.java

package com.hyzhou.htmlviver;

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;


import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.text.TextUtils;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

    private EditText edt;
    private TextView tView;
    
    private Handler handler=new Handler()
    {
        public void handleMessage(android.os.Message msg) {
            if (msg.what==1) {
                String content=(String) msg.obj;
                tView.setText(content);
            }
            
        };
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        edt=(EditText) findViewById(R.id.et);
        tView=(TextView) findViewById(R.id.tv);
    }
    public void click(View view)
    {
        final String path=edt.getText().toString().trim();
        if (TextUtils.isEmpty(path)) {
            Toast.makeText(this, "网址不能为空", 0).show();
        }else {
            new Thread(){
                public void run() {
                    try {
                        URL url=new URL(path);
                        HttpURLConnection conn=(HttpURLConnection) url.openConnection();
                        conn.setRequestMethod("GET");
                        conn.setConnectTimeout(5000);
                        conn.setRequestProperty("User-Agent", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)");
                        
                        int code=conn.getResponseCode();
                        if (code==200) {
                            InputStream in=conn.getInputStream();
                            String str=StreamRead.readData(in);
                            Message msg=new Message();
                            msg.what=1;
                            msg.obj=str;
                            handler.sendMessage(msg);
                        }else {
                            Toast.makeText(MainActivity.this, "显示异常", 0).show();
                        }
                    } catch (Exception e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    
                }
            }.start();
        }
    }


}

3、编写读取html数据类StreamRead.java

/**
 * 
 */
package com.hyzhou.htmlviver;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;

/**
 * @author hyzhou
 *
 * 2013-12-18
 */
public class StreamRead {
    public static String readData(InputStream inputStream) throws Exception
    {
        ByteArrayOutputStream outputStream=new ByteArrayOutputStream();
        byte[] buffer=new byte[1024];
        int len=-1;
        while ((len=inputStream.read(buffer)) !=-1 ){
            outputStream.write(buffer,0,len);
            
        }
        byte[] data=outputStream.toByteArray();
        outputStream.close();
        inputStream.close();
        return new String(data);
        
    }
}

4、添加权限AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.hyzhou.htmlviver"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.hyzhou.htmlviver.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

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