Respect for other people's work results, reprinted please indicate the source: http://blog.csdn.net/gengqiquan/article/details/65938021 This article is from: [gengqiquan's blog]

Leaders recently felt that Ctrip's screenshot generated growth map sharing effect is better, so we added one; the product felt that the shared long map needs to add company brand watermarking, so we added one; well, the cause of the incident is that.
Long graphs are generally ScrollView and ListView.
We need to get the full display of the two controls. The principle is simple. Make a canvas that matches the width and length of the control (that is, create a bitmap with the same height and width). Then call the draw method of the control to draw itself onto the canvas.
A Method of Obtaining Long Drawings by Posting Two Controls

 /**
     * Intercept scrollview screen
     **/
    public static Bitmap getScrollViewBitmap(ScrollView scrollView) {
        int h = 0;
        Bitmap bitmap;
        for (int i = 0; i < scrollView.getChildCount(); i++) {
            h += scrollView.getChildAt(i).getHeight();
        }
        // Create bitmap of corresponding size

        bitmap = Bitmap.createBitmap(ScreenUtils.getScreenWidth(scrollView.getContext()), h,
                Bitmap.Config.ARGB_4444);
        final Canvas canvas = new Canvas(bitmap);
        canvas.drawColor(Color.parseColor("#f2f7fa"));
        scrollView.draw(canvas);
        return bitmap;
    }

 /**
     * Screenshot list view
     **/
    public static Bitmap getListViewBitmap(ListView listView, String picpath) {
        int h = 0;
        Bitmap bitmap;
        // Get the actual height of listView
        for (int i = 0; i < listView.getChildCount(); i++) {
            h += listView.getChildAt(i).getHeight();
        }
listView.getHeight());
        // Create bitmap of corresponding size
        bitmap = Bitmap.createBitmap(listView.getWidth(), h,
                Bitmap.Config.RGB_565);
        final Canvas canvas = new Canvas(bitmap);
        canvas.drawColor(Color.WHITE);
        listView.draw(canvas);
        // Test output
        FileOutputStream out = null;
        try {
            out = new FileOutputStream(picpath);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        try {
            if (null != out) {
                bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
                out.flush();
                out.close();
            }
        } catch (IOException e) {
        }
        return bitmap;
    }

Presenting a way to get a display of a specific view

    /**
     * Generate a picture of a view
     *
     * @author gengqiquan
     * @date 2017/3/20 10:34 a.m.
     */
    public static Bitmap getViewDrawingCacheBitmap(View view) {
        view = view.getRootView();
        if (!view.isDrawingCacheEnabled()) {
            view.setDrawingCacheEnabled(true);
        }
        view.destroyDrawingCache();
        view.buildDrawingCache();
        Bitmap bm = view.getDrawingCache();
        view.setDrawingCacheEnabled(false);
        return bm;
    }

Give me another way to generate a Linear Layout image

/**
     * Generate an image of a Linear Layout
     *
     * @author gengqiquan
     * @date 2017/3/20 10:34 a.m.
     */
    public static Bitmap getLinearLayoutBitmap(LinearLayout linearLayout) {
        int h = 0;
        // Get the actual height of LinearLayout
        for (int i = 0; i < linearLayout.getChildCount(); i++) {
            linearLayout.getChildAt(i).measure(0, 0);
            h += linearLayout.getChildAt(i).getMeasuredHeight();
        }
        linearLayout.measure(0, 0);
        // Create bitmap of corresponding size
        Bitmap bitmap = Bitmap.createBitmap(linearLayout.getMeasuredWidth(), h,
                Bitmap.Config.RGB_565);
        final Canvas canvas = new Canvas(bitmap);
        canvas.drawColor(Color.WHITE);
        linearLayout.draw(canvas);
        return bitmap;
    }

After the product is finished, you will definitely add the logo image of the company below or above. Hmm. Good people do low, and then send a mosaic picture method

/**
*Stitching pictures
 * @param first Shared Long Map
 * @param second  Company logo chart
*@author gengqiquan
*@date 2017/3/25 4:56 p.m.
*/
    public static Bitmap add2Bitmap(Bitmap first, Bitmap second) {
        float scale = ((float) first.getWidth()) / second.getWidth();
        second = ImageUtil.scaleImg(second, scale);
        int width = first.getWidth();
        int height = first.getHeight() + second.getHeight();
        Bitmap result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_4444);
        Canvas canvas = new Canvas(result);
        canvas.drawBitmap(first, 0, 0, null);
        canvas.drawBitmap(second, 0, first.getHeight(), null);
        return result;
    }

Another method of adding full-image watermarking

/**
     * @param first Primitive graph
     * @param mark  Watermarking
     * @author gengqiquan
     * @date 2017/3/25 4:58 p.m.
     */
    public static Bitmap waterMark(Bitmap first, Bitmap mark) {
        float scale = ((float) first.getWidth()) / mark.getWidth();
        mark = ImageUtil.scaleImg(mark, scale);
        int width = first.getWidth();
        int height = first.getHeight();
        Bitmap result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_4444);
        Canvas canvas = new Canvas(result);
        canvas.drawBitmap(first, 0, 0, null);
        int h = 0;
        while (h < height + mark.getHeight()) {
            canvas.drawBitmap(mark, 0, h, null);
            h = h + mark.getHeight();
        }
        return result;
    }

My father's chrome has a bug. At this point, the line-break button will collapse. Writing a blog crashed seven or eight times. It's really bad luck lately.

In fact, I want to say: because recently injected into an object, the dependency is relatively strong, so this period of time rarely blog, after the supplement.

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