WebView 对象用于网页显示使用，简单的学习并使用了一下。

1、首先在 layout 中摆一个全屏的 webview 控件 （main.xml ）

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:orientation="vertical"  
    android:layout_width="fill_parent"  
    android:layout_height="fill_parent">

<WebView
        android:id="@+id/webView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

2、抽象出一个简单的 TestWebView 类,很简单，直接上代码：

package com.example.test;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

import android.util.Log;

public class TestWebView {

	private static final String TAG = "TestWebView";

	private reponseEvent re = null;

	public TestWebView() {

	}

	public static interface reponseEvent {

		public void onResult(String err,String result);

	}

	public void setListener(reponseEvent re) {

		this.re = re;

	}

	public void requestUrl(final String _url) {

		Thread th = new Thread(new Runnable() {

			@Override

			public void run() {

				String line = null;

				BufferedReader buffer = null;

				StringBuffer sb = new StringBuffer();

				try {

					URL url = new URL(_url);

					HttpURLConnection urlConn = (HttpURLConnection) url

							.openConnection();

					buffer = new BufferedReader(new InputStreamReader(urlConn

							.getInputStream(), "GB2312"));

					while ((line = buffer.readLine()) != null) {

						sb.append(line);

					}

				} catch (MalformedURLException e) {

					Log.e(TAG, "MalformedURLException: " + e.getMessage());

				} catch (IOException e) {

					Log.e(TAG, "IOException: " + e.getMessage());

				}

				if (re != null)

					re.onResult(null, sb.toString());

			}

		});

		th.start();

	}

}

3、用法

package com.example.test;

import java.io.UnsupportedEncodingException;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.view.Menu;

import android.view.View;

import android.webkit.WebView;

import android.widget.Button;

import com.example.test.TestWebView.reponseEvent;

public class MainActivity extends Activity {

	static final String TAG = "MainActivity";

	private WebView webView;

	private WebHandler webHandler = new WebHandler();

	private TestWebView testWebview = null;

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		initview();

		// testView();

		testView1();

	}

	void initview() {

		webView = (WebView) findViewById(R.id.webView1);

	}

	void testView() {

		testWebview = new TestWebView();

		testWebview.setListener(new reponseEvent() {

			@Override

			public void onResult(String err, String result) {

				Message msg = webHandler.obtainMessage();

				msg.what = 1;

				msg.obj = (String) result;

				webHandler.sendMessage(msg);

			}

		});

		testWebview.requestUrl("http://www.sina.com.cn/index.shtml");

	}

	void testView1() {

		webView.loadUrl("http://www.sina.com.cn/index.shtml");

	}

	class WebHandler extends Handler {

		public void handleMessage(android.os.Message msg) {

			switch (msg.what) {

			case 1:

				String s = (String) msg.obj;

				try {

					s = new String(s.getBytes("GB2312"), "GB2312");

				} catch (UnsupportedEncodingException e) {

					e.printStackTrace();

				}

				webView.getSettings().setDefaultTextEncodingName("UTF-8");

				webView.loadData(s, "text/html; charset=UTF-8", null);

				break;

			default:

				break;

			}

		};

	};

}

使用了两种方式来调用加载url方式：

void android.webkit.WebView.loadData(String data, String mimeType, String encoding)