在Android开发中，使用WebView控件，可以很方便的实现Web浏览器的功能。

使用WebView加载一个网页很简单：

WebView webView =newWebView(this);

webView.loadUrl("http://www.google.com/");

WebView webView = new WebView(this);

webView.loadUrl("http://www.google.com/");

加载apk包中的一个html页面的方法：

webView.loadUrl("file:///android_asset/test.html");

webView.loadUrl("file:///android_asset/test.html");

加载手机本地的一个html页面的方法：

webView.loadUrl("content://com.android.htmlfileprovider/sdcard/test.html");

webView.loadUrl("content://com.android.htmlfileprovider/sdcard/test.html");

WebView中有很多设置，可以用来开启或禁用插件，JavaScript等：

public class MyWebViewClient extends WebViewClient

{

@Override

public boolean shouldOverrideUrlLoading(WebView view, String url)

{

view.loadUrl(url);

return true;

}

@Override

public void doUpdateVisitedHistory(WebView view, String url,

boolean isReload)

{

// TODO Auto-generated method stub

super.doUpdateVisitedHistory(view, url, isReload);

}

@Override

public void onFormResubmission(WebView view, Message dontResend,

Message resend)

{

// TODO Auto-generated method stub

super.onFormResubmission(view, dontResend, resend);

}

@Override

public void onLoadResource(WebView view, String url)

{

// TODO Auto-generated method stub

super.onLoadResource(view, url);

}

@Override

public void onPageFinished(WebView view, String url)

{

// TODO Auto-generated method stub

super.onPageFinished(view, url);

}

@Override

public void onPageStarted(WebView view, String url, Bitmap favicon)

{

// TODO Auto-generated method stub

super.onPageStarted(view, url, favicon);

}

@Override

public void onReceivedError(WebView view, int errorCode,

String description, String failingUrl)

{

// TODO Auto-generated method stub

super.onReceivedError(view, errorCode, description, failingUrl);

}

@Override

public void onReceivedHttpAuthRequest(WebView view,

HttpAuthHandler handler, String host, String realm)

{

// TODO Auto-generated method stub

super.onReceivedHttpAuthRequest(view, handler, host, realm);

}

@Override

public void onReceivedSslError(WebView view, SslErrorHandler handler,

SslError error)

{

// TODO Auto-generated method stub

super.onReceivedSslError(view, handler, error);

}

@Override

public void onScaleChanged(WebView view, float oldScale, float newScale)

{

// TODO Auto-generated method stub

super.onScaleChanged(view, oldScale, newScale);

}

@Override

public void onTooManyRedirects(WebView view, Message cancelMsg,

Message continueMsg)

{

// TODO Auto-generated method stub

super.onTooManyRedirects(view, cancelMsg, continueMsg);

}

@Override

public void onUnhandledKeyEvent(WebView view, KeyEvent event)

{

// TODO Auto-generated method stub

super.onUnhandledKeyEvent(view, event);

}

@Override

public boolean shouldOverrideKeyEvent(WebView view, KeyEvent event)

{

// TODO Auto-generated method stub

return super.shouldOverrideKeyEvent(view, event);

}

}

然后将其设置到WebView中：

MyWebViewClient webViewClient=new MyWebViewClient();

webView.setWebViewClient(webViewClient);

如果是要自定义页面的显示，如：JavaScript提示框，网站图标，加载进度条等，则可以自定义一个WebChromeClient

public class MyWebChromeClient extends WebChromeClient

{

@Override

public void onProgressChanged(WebView view, int newProgress)

{

if(newProgress==100)

{

view.setVisibility(View.VISIBLE);

}

}

@Override

public Bitmap getDefaultVideoPoster()

{

// TODO Auto-generated method stub

return super.getDefaultVideoPoster();

}

@Override

public View getVideoLoadingProgressView()

{

// TODO Auto-generated method stub

return super.getVideoLoadingProgressView();

}

@Override

public void getVisitedHistory(ValueCallback callback)

{

// TODO Auto-generated method stub

super.getVisitedHistory(callback);

}

@Override

public void onCloseWindow(WebView window)

{

// TODO Auto-generated method stub

super.onCloseWindow(window);

}

@Override

public boolean onConsoleMessage(ConsoleMessage consoleMessage)

{

// TODO Auto-generated method stub

return super.onConsoleMessage(consoleMessage);

}

@Override

public void onConsoleMessage(String message, int lineNumber,

String sourceID)

{

// TODO Auto-generated method stub

super.onConsoleMessage(message, lineNumber, sourceID);

}

@Override

public boolean onCreateWindow(WebView view, boolean dialog,

boolean userGesture, Message resultMsg)

{

// TODO Auto-generated method stub

return super.onCreateWindow(view, dialog, userGesture, resultMsg);

}

@Override

public void onExceededDatabaseQuota(String url,

String databaseIdentifier, long currentQuota,

long estimatedSize, long totalUsedQuota,

QuotaUpdater quotaUpdater)

{

// TODO Auto-generated method stub

super.onExceededDatabaseQuota(url, databaseIdentifier, currentQuota,

estimatedSize, totalUsedQuota, quotaUpdater);

}

@Override

public void onGeolocationPermissionsHidePrompt()

{

// TODO Auto-generated method stub

super.onGeolocationPermissionsHidePrompt();

}

@Override

public void onGeolocationPermissionsShowPrompt(String origin,

Callback callback)

{

// TODO Auto-generated method stub

super.onGeolocationPermissionsShowPrompt(origin, callback);

}

@Override

public void onHideCustomView()

{

// TODO Auto-generated method stub

super.onHideCustomView();

}

@Override

public boolean onJsAlert(WebView view, String url, String message,

JsResult result)

{

// TODO Auto-generated method stub

return super.onJsAlert(view, url, message, result);

}

@Override

public boolean onJsBeforeUnload(WebView view, String url,

String message, JsResult result)

{

// TODO Auto-generated method stub

return super.onJsBeforeUnload(view, url, message, result);

}

@Override

public boolean onJsConfirm(WebView view, String url, String message,

JsResult result)

{

// TODO Auto-generated method stub

return super.onJsConfirm(view, url, message, result);

}

@Override

public boolean onJsPrompt(WebView view, String url, String message,

String defaultValue, JsPromptResult result)

{

// TODO Auto-generated method stub

return super.onJsPrompt(view, url, message, defaultValue, result);

}

@Override

public boolean onJsTimeout()

{

// TODO Auto-generated method stub

return super.onJsTimeout();

}

@Override

public void onReachedMaxAppCacheSize(long spaceNeeded,

long totalUsedQuota, QuotaUpdater quotaUpdater)

{

// TODO Auto-generated method stub

super.onReachedMaxAppCacheSize(spaceNeeded, totalUsedQuota, quotaUpdater);

}

@Override

public void onReceivedIcon(WebView view, Bitmap icon)

{

// TODO Auto-generated method stub

super.onReceivedIcon(view, icon);

}

@Override

public void onReceivedTitle(WebView view, String title)

{

// TODO Auto-generated method stub

super.onReceivedTitle(view, title);

}

@Override

public void onReceivedTouchIconUrl(WebView view, String url,

boolean precomposed)

{

// TODO Auto-generated method stub

super.onReceivedTouchIconUrl(view, url, precomposed);

}

@Override

public void onRequestFocus(WebView view)

{

// TODO Auto-generated method stub

super.onRequestFocus(view);

}

@Override

public void onShowCustomView(View view, CustomViewCallback callback)

{

// TODO Auto-generated method stub

super.onShowCustomView(view, callback);

}

}

这些方法中，只需要实现自己需要的就可以了。

然后把自定义的client注册到WebView中去：

MyWebChromeClient webChromeClient=new MyWebChromeClient();

webView.setWebChromeClient(webChromeClient);