android.widget.HorizontalScrollView#getChildAt ( )源码实例Demo

/**
 * 通过 HorizontalScrollView 绘制为 Bitmap
 * @param scrollView {@link HorizontalScrollView}
 * @param config     {@link Bitmap.Config}
 * @return {@link Bitmap}
 */
public static Bitmap snapshotByHorizontalScrollView(final HorizontalScrollView scrollView, final Bitmap.Config config) {
    if (scrollView == null || config == null) return null;
    try {
        View view = scrollView.getChildAt(0);
        int width = view.getWidth();
        int height = view.getHeight();

        Bitmap bitmap = Bitmap.createBitmap(width, height, config);
        Canvas canvas = new Canvas(bitmap);
        canvas.drawColor(BACKGROUND_COLOR);
        scrollView.layout(0, 0, scrollView.getMeasuredWidth(),
                scrollView.getMeasuredHeight());
        scrollView.draw(canvas);
        return bitmap;
    } catch (Exception e) {
        LogPrintUtils.eTag(TAG, e, "snapshotByHorizontalScrollView");
    }
    return null;
}