网站重新备案 需要关闭网站么,电子商务网站建设感想,企业内网网站,网站后台做数据库备份代码WebView 网页滚动截屏#xff0c;可对整个网页进行截屏而不是仅当前屏幕哦#xff01; 注意若Web页面存在position:fixed; 的话得在调用前设置为 position:absolute; 哦#xff0c;否则会出现很多次的#xff0c;请看下面的具体解说吧#xff01;#xff01; private st… WebView 网页滚动截屏可对整个网页进行截屏而不是仅当前屏幕哦 注意若Web页面存在position:fixed; 的话得在调用前设置为 position:absolute; 哦否则会出现很多次的请看下面的具体解说吧 private static Bitmap getViewBitmapWithoutBottom(View v) {if (null v) {return null;}v.setDrawingCacheEnabled(true);v.buildDrawingCache();if (Build.VERSION.SDK_INT 11) {v.measure(View.MeasureSpec.makeMeasureSpec(v.getWidth(), View.MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(v.getHeight(), View.MeasureSpec.EXACTLY));v.layout((int) v.getX(), (int) v.getY(), (int) v.getX() v.getMeasuredWidth(), (int) v.getY() v.getMeasuredHeight());} else {v.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());}Bitmap bp Bitmap.createBitmap(v.getDrawingCache(), 0, 0, v.getMeasuredWidth(), v.getMeasuredHeight() - v.getPaddingBottom());v.setDrawingCacheEnabled(false);v.destroyDrawingCache();return bp;}public static Bitmap getViewBitmap(View v) {if (null v) {return null;}v.setDrawingCacheEnabled(true);v.buildDrawingCache();if (Build.VERSION.SDK_INT 11) {v.measure(View.MeasureSpec.makeMeasureSpec(v.getWidth(), View.MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(v.getHeight(), View.MeasureSpec.EXACTLY));v.layout((int) v.getX(), (int) v.getY(), (int) v.getX() v.getMeasuredWidth(), (int) v.getY() v.getMeasuredHeight());} else {v.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());}Bitmap b Bitmap.createBitmap(v.getDrawingCache(), 0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());v.setDrawingCacheEnabled(false);v.destroyDrawingCache();return b;}/*** 获取 WebView 视图截图* param context* param view* return*/public static Bitmap getWebViewBitmap(Context context, WebView view) {if (null view) return null;view.scrollTo(0, 0);view.buildDrawingCache(true);view.setDrawingCacheEnabled(true);view.setVerticalScrollBarEnabled(false);Bitmap b getViewBitmapWithoutBottom(view);// 可见高度int vh view.getHeight();// 容器内容实际高度int th (int)(view.getContentHeight()*view.getScale());Bitmap temp null;if (th vh) {int w getScreenWidth(context);int absVh vh - view.getPaddingTop() - view.getPaddingBottom();do {int restHeight th - vh;if (restHeight absVh) {view.scrollBy(0, restHeight);vh restHeight;temp getViewBitmap(view);} else {view.scrollBy(0, absVh);vh absVh;temp getViewBitmapWithoutBottom(view);}b mergeBitmap(vh, w, temp, 0, view.getScrollY(), b, 0, 0);} while (vh th);}// 回滚到顶部view.scrollTo(0, 0);view.setVerticalScrollBarEnabled(true);view.setDrawingCacheEnabled(false);view.destroyDrawingCache();return b;}/*** 拼接图片* param newImageH* param newImageW* param background* param backX* param backY* param foreground* param foreX* param foreY* return*/private static Bitmap mergeBitmap(int newImageH, int newImageW, Bitmap background, float backX, float backY, Bitmap foreground, float foreX, float foreY) {if (null background || null foreground) {return null;}Bitmap bitmap Bitmap.createBitmap(newImageW, newImageH, Bitmap.Config.RGB_565);Canvas cv new Canvas(bitmap);cv.drawBitmap(background, backX, backY, null);cv.drawBitmap(foreground, foreX, foreY, null);cv.save(Canvas.ALL_SAVE_FLAG);cv.restore();return bitmap;}/*** get the width of screen*/public static int getScreenWidth(Context ctx) {int w 0;if (Build.VERSION.SDK_INT 13) {Point p new Point();((WindowManager) ctx.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getSize(p);w p.x;} else {w ((WindowManager) ctx.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getWidth();}return w;}/*** 保存图片* param context* param bitmap* param file* param quality* return*/public static boolean save(Context context, Bitmap bitmap, File file, int quality) {if (bitmap null) return false;// 获得后缀格式String abs file.getAbsolutePath();String suffix abs.substring(abs.lastIndexOf(.)1).toLowerCase();Bitmap.CompressFormat format;if (jpg.equals(suffix) || jpeg.equals(suffix)) {format Bitmap.CompressFormat.JPEG;} else {format Bitmap.CompressFormat.PNG;quality 100;}if (file.exists() ! file.delete()) return false;try {FileOutputStream stream new FileOutputStream(file);bitmap.compress(format, quality, stream);stream.flush();stream.close();context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(file)));return true;} catch (Exception e) {return false;}} JS调用截屏操作 /*** 屏幕截图* param name* param isRecover*/JavascriptInterfacepublic String Capture(String name, boolean isRecover) {File dir new File(Config.PUBLIC_PICTURES_PATH);LogUtil.i(capture, dir.getAbsolutePath());if (! dir.exists() ! dir.mkdirs()) return null;final File file new File(dir, name);String path file.getAbsolutePath();if (file.exists() ! isRecover) return path;body.post(new Runnable() {Overridepublic void run() {Bitmap bitmap CaptureUtil.getWebViewBitmap(activity, body);if (null ! bitmap) ImageUtil.save(activity, bitmap, file, 100);}});return path;}JavascriptInterfacepublic String Capture(String name) {return Capture(name, true);}JavascriptInterfacepublic String Capture() {String name String.valueOf(System.currentTimeMillis()) .png;return Capture(name);}示例图我先通过 JS 触发显示了一个原生的 Button按钮 然后WebView跳转到 csdn 页面然后点击截屏按钮用来触发网页截屏的。下面的图是我手动截的图不是上面代码的效果哈下下面很长的那张才是Java程序的网页截图。。。 测试CSDN的网页完整截图比较长哦~ 一般截图的功能都用于特殊的页面如活动页面之类的不会太长那样是没有问题的。若是这种滚动到底部自动加载的话可能就会很长很长很长啦·····自己看着办吧。。 但这里有个BUG顶部固定Banner条每次截屏都有这个有解决办法不过得是你自己的网页才有操作权限哦需要修改JS啦。 当截图JS命令触发前把顶部悬浮的样式设置为绝对定位当截屏完成后再改回固定定位即可没什么难度了。 截屏是需要一些时间的所以需要预设一个定时器来操作JS栗子如下: JS.Capture 是 WebView 绑定的自定义 Javascript 类对象 var file ;var $header $(#layout-header);$header.css({ position: absolute });setTimeout(function(){if (typeof name function || typeof name undefined) {file JS.Capture();} else {file JS.Capture(name, isRecover);}}, 500);setTimeout(function(){JS.Toast(截图已保存, fast);JS.Toast(file.replace(storage/emulated/0/, ));$header.css({ position: fixed });if ($.isFunction(callback)) {callback(file);}}, 1500); 转载于:https://www.cnblogs.com/zhouzme/p/5758388.html
