如何创建WebView

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如何创建WebView:

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<wbr><wbr><wbr> 1、添加权限：AndroidManifest.xml中必须使用许可"android.permission.INTERNET",否则会出Web page not available错误。</wbr></wbr></wbr>

<wbr><wbr><wbr> 2、在要Activity中生成一个WebView组件：WebView webView = new WebView(this);</wbr></wbr></wbr>

<wbr><wbr><wbr> 3、设置WebView基本信息：</wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> 如果访问的页面中有Javascript，则webview必须设置支持Javascript。</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> webview.getSettings().setJavaScriptEnabled(true);<wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> 触摸焦点起作用</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> requestFocus();//如果不设置，则在点击网页文本输入框时，不能弹出软键盘及不响应其他的一些事件。</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> 取消滚动条</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> this.setScrollBarStyle(SCROLLBARS_OUTSIDE_OVERLAY);</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr> 4、设置WevView要显示的网页：</wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>互联网用：webView.loadUrl("http://www.google.com");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> 本地文件用：webView.loadUrl("file:///android_asset/XX.html");<wbr> 本地文件存放在：assets文件中</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr> 5、如果希望点击链接由自己处理，而不是新开Android的系统browser中响应该链接。</wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> 给WebView添加一个事件监听对象（WebViewClient)<wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

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<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> 并重写其中的一些方法</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> shouldOverrideUrlLoading<wbr>：对网页中超链接按钮的响应。</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> 当按下某个连接时WebViewClient会调用这个方法，并传递参数：按下的url</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> onLoadResource<wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> onPageStart<wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> onPageFinish<wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> onReceiveError</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> onReceivedHttpAuthReques<wbr>t</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

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<wbr><wbr><wbr> 6、如果用webview点链接看了很多页以后，如果不做任何处理，点击系统“Back”键，整个<a href="http://www.2cto.com/os/liulanqi/" target="_blank">浏览器</a>会调用finish()而结束自身，如果希望浏览的网页回退而不是退出浏览器，需要在当前Activity中处理并消费掉该Back事件。</wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr> 覆盖Activity类的onKeyDown(int keyCoder,KeyEvent event)方法。</wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr> public boolean onKeyDown(int keyCoder,KeyEvent event){</wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> if(webView.canGoBack() &amp;&amp; keyCoder == KeyEvent.KEYCODE_BACK){</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> webview.goBack();<wbr><wbr> //goBack()表示返回webView的上一页面</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

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<wbr> WebView相关问题注意：</wbr>

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Android的webView很强大，其实就是一个浏览器，你可以把它嵌入到你想要的位置，我这里遇到两个问题，就是怎么知道网页的加载进度和加载网页时，

点击网页里面的链接还是在当前的webview里跳转，不想跳到浏览器那边，解决办法如下：

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//此方法可以处理webview 在加载时和加载完成时一些操作

webView.setWebChromeClient(new WebChromeClient（）{

<wbr> @Override</wbr>

<wbr> public void onProgressChanged(WebView view, int newProgress) {</wbr>

<wbr><wbr><wbr> if(newProgress==100){<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> // 这里是设置activity的标题， 也可以根据自己的需求做一些其他的操作</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> title.setText("加载完成")；</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr> }else{</wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr> title.setText("加载中.......");</wbr></wbr></wbr></wbr>

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<wbr><wbr><wbr><wbr><wbr> }</wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr> }</wbr></wbr></wbr>

});

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webView.setWebViewClient(new WebViewClient（）{

<wbr> @Override</wbr>

<wbr><wbr><wbr> public boolean shouldOverrideUrlLoading<wbr>(WebView view, String url) {<wbr> //重写此方法表明点击网页里面的链接还是在当前的webview里跳转，不跳到浏览器那边</wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr> view.loadUrl(url);</wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr> return true;</wbr></wbr></wbr></wbr></wbr></wbr>

<wbr> }</wbr>

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<wbr><wbr><wbr><wbr><wbr><wbr><wbr> @Override</wbr></wbr></wbr></wbr></wbr></wbr></wbr>

public void onReceivedSslError(WebView view, SslErrorHandler handler, android.net.http.SslError error) { // 重写此方法可以让webview处理https请求

handler.proceed();

}

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});