webView 配置 

        WebSettings webSettings = webView.getSettings(); 

        webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
        webSettings.setDomStorageEnabled(true);
        webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.SINGLE_COLUMN);//自適應螢幕        ☆☆
        webSettings.setDisplayZoomControls(false);
        webSettings.setJavaScriptEnabled(true); // 設定支援javascript指令碼 ☆☆
        webSettings.setAllowFileAccess(true); // 允許訪問檔案
        webSettings.setBuiltInZoomControls(true); // 設定顯示縮放按鈕
        webSettings.setSupportZoom(true); // 支援縮放
        webSettings.setLoadWithOverviewMode(true);
        webSettings.setUseWideViewPort(true);  
 

 Android處理事件

    public static class JavaScriptInterface {
        
        private Context context;
        
        public JavaScriptInterface(Context context) {
            this.context = context;
        }
        
        //點選圖片回撥方法
        //必須添加註解,否則無法響應
        @JavascriptInterface
        public void openImage(String imgsrc) { 
            Bitmap bitmap = null;
            try
            {
                bitmap = BitmapFactory.decodeStream(new URL(imgsrc).openStream());
            } catch (IOException e)
            {
                e.printStackTrace();
            }
            Drawable drawable;
            if (bitmap != null)
            {
                drawable = new BitmapDrawable(context.getResources(), bitmap);
                ImgTool.ViewImg((Activity) context,drawable);
            }
            
        }
    }
 

重寫 onPageFinished 注入js

        webView.setWebViewClient(new WebViewClient()
        {
            
            @Override
            public void onPageFinished(WebView view, String url)
            {
                super.onPageFinished(view, url);
                /**
                 * 對圖片進行重置大小，寬度就是手機螢幕寬度，高度根據寬度比便自動縮放
                 **/
                
                webView.loadUrl("javascript:(function(){"
                        + "var objs = document.getElementsByTagName('img'); "
                        + "for(var i=0;i<objs.length;i++)  "
                        + "{"
                        + "var img = objs[i];   "
                        + "    img.style.maxWidth = '100%'; img.style.height = 'auto';  "
                        + "}"
                        + "})()");
                
                
                // html載入完成之後，新增監聽圖片的點選js函式
                webView.loadUrl("javascript:(function(){"
                        + "var objs = document.getElementsByTagName(\"img\"); "
                        + "for(var i=0;i<objs.length;i++)  "
                        + "{"
                        + "    objs[i].onclick=function()  "
                        + "    {  "
                        + "        window.imagelistner.openImage(this.src);  "
                        + "    }  "
                        + "}"
                        + "})()");
                
            }    
            
        });
 

        //AndroidtoJS類物件對映到js的openImage物件
        webView.addJavascriptInterface(new ImgTool.JavaScriptInterface(ShowTextActivity.this), "imagelistner");
        
        webView.loadUrl(url);