webView使用

webView使用

1、  概述

Webview就是起到内嵌浏览器的作用

 

2、  FAQ遇到的问题也比较多

需求是在TV里调用支付宝的url显示他的二维码

Js 不显示 webView.getSettings().setJavaScriptEnabled(true);

二维码居中（原来是左右两列） webView.getSettings().setLayoutAlgorithm(LayoutAlgorithm.SINGLE_COLUMN);

直接跳到浏览器，嵌套不住 // 防止跑到浏览器界面去 webView.setWebViewClient(new WebViewClient() {     public boolean shouldOverrideUrlLoading(WebView view, String url) {               hold.webView.loadUrl(url);               return true;            }     });

添加滚动条，加载条 webView.setWebChromeClient(new WebChromeClient() {               @Override               public void onReceivedTitle(WebView view, String title) {                     super.onReceivedTitle(view, title);               }                 @Override               public void onProgressChanged(WebView view, int progress) {                     if (progress == 100) {                      progressBar.setVisibility(View.GONE);                   }                   super.onProgressChanged(view, progress);               }              });

加载html文件 webView.loadUrl("file:///android_asset/a.html");

html的字符串不行。因为有js渲染（背景渲染不出来） webView.loadDataWithBaseURL(null, htmlString, "text/html",  "utf-8", null); 解决： webView.loadData(URLEncoder.encode(htmlString, "utf-8"), "text/html", "utf-8");

webView.getSettings().setJavaScriptEnabled(true);// 支持jsp webView.getSettings().setLayoutAlgorithm(LayoutAlgorithm.SINGLE_COLUMN);//适应屏幕,单列居中 webView.getSettings().setUseWideViewPort(true); webView.getSettings().setLoadWithOverviewMode(true); webView.setFocusable(false); webView.setHorizontalScrollBarEnabled(false); webView.setVerticalScrollBarEnabled(false); webView.getSettings().setDefaultTextEncodingName("utf-8");              // 防止Uncaught TypeError: Cannot call method            webView.getSettings().setDomStorageEnabled(true);              // 防止跑到浏览器界面去            webView.setWebViewClient(new WebViewClient() {               public boolean shouldOverrideUrlLoading(WebView view, String url) {                   hold.webView.loadUrl(url);                     return true;               }            });              // 此处能拦截超链接的url,即拦截href请求的内容.            webView.setWebChromeClient(new WebChromeClient() {               @Override               public void onReceivedTitle(WebView view, String title) {                     super.onReceivedTitle(view, title);               }                 @Override               public void onProgressChanged(WebView view, int progress) {                     if (progress == 100) {                      progressBar.setVisibility(View.GONE);                   }                   super.onProgressChanged(view, progress);               }              });