Android截取指定View为图片的实现方法

//诺,主要观察这两个方法 /** * 压缩图片 * * @param bgimage * @param newWidth * @param newHeight * @return */ public static Bitmap zoomImage(Bitmap bgimage, double newWidth, double newHeight) { // 获取这个图片的宽和高 float width = bgimage.getWidth(); float height = bgimage.getHeight(); // 创建操作图片用的matrix对象 Matrix matrix = new Matrix(); // 计算宽高缩放率 float scaleWidth = ((float) newWidth) / width; float scaleHeight = ((float) newHeight) / height; // 缩放图片动作 //matrix.postScale(scaleWidth, scaleHeight);//TODO 因为宽高不确定的因素,所以不缩放 Bitmap bitmap = Bitmap.createBitmap(bgimage, 0, 0, (int) width,  (int) height, matrix, true); return bitmap; } /** * 截取指定View为图片 * * @param view * @return * @throws Throwable */ public static Bitmap captureView(View view) throws Throwable { Bitmap bm = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888); view.draw(new Canvas(bm)); return bm; }

//这个是使用逻辑 Bitmap bitmap = null;  try {   bitmap = captureView(mShareBackgroundSign);  } catch (Throwable throwable) {   throwable.printStackTrace();  }  UMImage umImage = null;  umImage = new UMImage(getActivity(), zoomImage(bitmap, 720, 1280));  new ShareAction(getActivity()).setPlatform(SHARE_MEDIA.WEIXIN)   .withText(content)   .withMedia(umImage)   .share();