Android WebView的使用

WebView可以使得网页轻松的内嵌到app里，还可以直接跟js相互调用。

webview有两个方法：setWebChromeClient 和 setWebClient

setWebClient：主要处理解析，渲染网页等浏览器做的事情

setWebChromeClient：辅助WebView处理Javascript的对话框，网站图标，网站title，加载进度等

WebViewClient就是帮助WebView处理各种通知、请求事件的。

使用WebView：可以在代码中和布局中使用。

代码中：创建WebView的实例加入到Activity view tree中

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

布局中：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="match_parent"android:layout_height="match_parent"><WebView    android:id="@+id/wv_shop"    android:layout_width="match_parent"    android:layout_height="match_parent"></WebView></LinearLayout>

对WebView的设置

        wvShop.loadUrl("http://demo3.tp-shop.cn");        WebSettings webSettings = wvShop.getSettings();        webSettings.setJavaScriptEnabled(true);        webSettings.setSupportZoom(true);        wvShop.setWebViewClient(mWebViewClientBase);        wvShop.setWebChromeClient(mWebChromeClientBase);         private WebViewClientBase mWebViewClientBase = new WebViewClientBase();    private class WebViewClientBase extends WebViewClient {        @Override        public boolean shouldOverrideUrlLoading(WebView view, String url) {            view.loadUrl(url);            return true;        }        @Override        public void onPageStarted(WebView view, String url, Bitmap favicon) {            super.onPageStarted(view, url, favicon);        }        @Override        public void onPageFinished(WebView view, String url) {            super.onPageFinished(view, url);        }        @Override        public void onReceivedError(WebView view, int errorCode,                                    String description, String failingUrl) {            super.onReceivedError(view, errorCode, description, failingUrl);        }        @Override        public void doUpdateVisitedHistory(WebView view, String url,                                           boolean isReload) {            super.doUpdateVisitedHistory(view, url, isReload);        }    }    private WebChromeClientBase mWebChromeClientBase = new WebChromeClientBase();    private class WebChromeClientBase extends WebChromeClient {        @Override        public void onProgressChanged(WebView view, int newProgress) {            TpShopActivity.this.setProgress(newProgress * 1000);        }        @Override        public void onReceivedTitle(WebView view, String title) {            super.onReceivedTitle(view, title);        }        @Override        public void onReceivedTouchIconUrl(WebView view, String url,                                           boolean precomposed) {            super.onReceivedTouchIconUrl(view, url, precomposed);        }        @Override        public boolean onCreateWindow(WebView view, boolean isDialog,                                      boolean isUserGesture, Message resultMsg) {            return super.onCreateWindow(view, isDialog, isUserGesture, resultMsg);        }    }

对返回键的处理：

    @Override    public void onBackPressed() {//        super.onBackPressed();        if (wvShop.canGoBack()){            wvShop.goBack();        }else{            finish();        }    }

参考文章：1.http://blog.csdn.net/yaodong379/article/details/51960451 使用方法详细。
2.http://blog.csdn.net/typename/article/details/39030091 有对webview方法的介绍。
3.http://zouhuajian01.blog.163.com/blog/static/117698772012111511449668/ 关于WebView的缩放