/** * Convenience method to set some generic defaults for a * given WebView * * @param webView */ @TargetApi(Build.VERSION_CODES.HONEYCOMB) private void setUpWebViewDefaults(WebView webView) { //开启硬件加速后，WebView渲染页面更加快速，拖动也更加顺滑。 // 但有个副作用就是容易会出现页面加载白块同时界面闪烁现象。 // 解决这个问题的方法是设置WebView暂时关闭硬件加速 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB && webView.isHardwareAccelerated()) { webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null); } WebSettings settings = webView.getSettings(); // 设置字符集编码 settings.setDefaultTextEncodingName("UTF-8"); //支持数据保存 settings.setSavePassword(true); settings.setSaveFormData(true); //支持缩放 settings.setSupportZoom(true); // Enable Javascript settings.setJavaScriptEnabled(true); // Use WideViewport and Zoom out if there is no viewport defined settings.setUseWideViewPort(true); settings.setLoadWithOverviewMode(true); settings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.SINGLE_COLUMN);//自适应屏幕 // Enable pinch to zoom without the zoom buttons settings.setBuiltInZoomControls(true); if(Build.VERSION.SDK_INT > Build.VERSION_CODES.HONEYCOMB) { // Hide the zoom controls for HONEYCOMB+ settings.setDisplayZoomControls(false); } // Enable remote debugging via chrome://inspect if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { WebView.setWebContentsDebuggingEnabled(true); } //如果SDK版本大于19则使用缓存数据 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { settings.setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK); } //加载图片优化 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { settings.setLoadsImagesAutomatically(true);//图片自动缩放 打开 } else { settings.setLoadsImagesAutomatically(false);//图片自动缩放 关闭 } //支持localStorage settings.setDomStorageEnabled(true); settings.setAppCacheMaxSize(1024*1024*8); String appCachePath = getApplicationContext().getCacheDir().getAbsolutePath(); settings.setAppCachePath(appCachePath); settings.setAllowFileAccess(true); settings.setAppCacheEnabled(true); } 

@Override protected void onDestroy() { mGroupLayout.removeAllViews(); webView.stopLoading(); webView.removeAllViews(); webView.destroy(); webView = null; mGroupLayout = null; super.onDestroy(); }