WebView应用

WebView使用:

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/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		// 在标题栏上显示进度
		getWindow().requestFeature(Window.FEATURE_PROGRESS);

		// 定义WebView
		webview = new WebView(this);
		setContentView(webview);

		// 滚动条风格
		webview.setScrollBarStyle(0);

		// 设置JS可用
		webview.getSettings().setJavaScriptEnabled(true);

		final Activity activity = this;

		/*
		 * WebChromeClient类:用来辅助WebView处理JavaScript的对话框,网站图标,网站Title,加载进度等
		 * 通过setWebChromeClient调协WebChromeClient类
		 */
		webview.setWebChromeClient(new WebChromeClient() {
			// 加载进度中,100时停止
			public void onProgressChanged(WebView view, int progress) {
				activity.setProgress(progress * 100);
			}

			@Override
			public void onReceivedTitle(WebView view, String title) {
				activity.setTitle(title);
			}

		});

		/*
		 * WebViewClient类: 用来辅助WebView处理各种通知,请求等事件的类
		 * 通过setWebViewClient设置WebViewClient类
		 */
		webview.setWebViewClient(new WebViewClient() {
			// 页面加载失败
			public void onReceivedError(WebView view, int errorCode,
					String description, String failingUrl) {
				Toast.makeText(activity, "异常:! " + description,
						Toast.LENGTH_LONG).show();
			}

		});
		webview.loadUrl(Url);

	}

	/*
	 * 通过WebView的goBack(),goForward()方法设置其前进和后退
	 */
	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		// TODO Auto-generated method stub
		if (keyCode == KeyEvent.KEYCODE_BACK && webview.canGoBack()) {
			// 返回前一个页面
			webview.goBack();
			return true;
		}
		return super.onKeyDown(keyCode, event);
	}

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layout:

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<?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"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
</LinearLayout>

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添加权限:

<uses-permission android:name="android.permission.INTERNET"/>