网络取得HTML网页

网络获得HTML网页

1：StreamTool

package cn.itcast.utils;import java.io.ByteArrayOutputStream;import java.io.InputStream;public class StreamTool { /**  * 从输入流中获取数据  * @param inStream 输入流  * @return  * @throws Exception  */ public static byte[] readInputStream(InputStream inStream) throws Exception{  ByteArrayOutputStream outStream = new ByteArrayOutputStream();  byte[] buffer = new byte[1024];  int len = 0;  while( (len=inStream.read(buffer)) != -1 ){   outStream.write(buffer, 0, len);  }  inStream.close();  return outStream.toByteArray(); }}

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2：HtmlService

package cn.itcast.service;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import cn.itcast.utils.StreamTool;public class HtmlService {public static String getHtml(String path) throws Exception {URL url = new URL(path);HttpURLConnection conn = (HttpURLConnection)url.openConnection();conn.setRequestMethod("GET");conn.setConnectTimeout(5 * 1000);InputStream inStream = conn.getInputStream();//通过输入流获取html数据byte[] data = StreamTool.readInputStream(inStream);//得到html的二进制数据String html = new String(data, "gb2312");return html;}}

?3：MainActivity

package cn.itcast.html;import cn.itcast.service.HtmlService;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity {    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                TextView textView = (TextView)this.findViewById(R.id.textView);        try {        textView.setText(HtmlService.getHtml("http://www.sohu.com"));} catch (Exception e) {Log.e("MainActivity", e.toString());Toast.makeText(MainActivity.this, "网络连接失败", 1).show();}            }}

?4：

  <?xml version="1.0" encoding="utf-8" ?> - <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="cn.itcast.html" android:versionCode="1" android:versionName="1.0">- <application android:icon="@drawable/icon" android:label="@string/app_name">- <activity android:name=".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>  <uses-sdk android:minSdkVersion="8" /> - <!--  访问网络的权限   -->   <uses-permission android:name="android.permission.INTERNET" />   </manifest>

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