安卓将布局保存为画报图片

private fun genPoster() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
copyPixel()
} else {
savePoster()
}

}

private fun savePoster() {

    poster_layout.isDrawingCacheEnabled = true
    poster_layout.buildDrawingCache()
    var bitmap = poster_layout.drawingCache
    Runnable {
        kotlin.run {
            if (bitmap == null) { //处理华为meta9等手机出现的问题
                bitmap = Bitmap.createBitmap(
                    poster_layout.width,
                    poster_layout.height, Bitmap.Config.ARGB_8888
                )
                val canvas = Canvas(bitmap)
                if (Build.VERSION.SDK_INT >= 11) {
                    poster_layout.measure(
                        View.MeasureSpec.makeMeasureSpec(
                            poster_layout.getWidth(),
                            View.MeasureSpec.EXACTLY
                        ),
                        View.MeasureSpec.makeMeasureSpec(
                            poster_layout.getHeight(),
                            View.MeasureSpec.EXACTLY
                        )
                    )
                    poster_layout.layout(
                        poster_layout.x as Int,
                        poster_layout.y as Int,
                        poster_layout.x as Int + poster_layout.measuredWidth,
                        poster_layout.y as Int + poster_layout.measuredHeight
                    )
                } else {
                    poster_layout.measure(
                        View.MeasureSpec.makeMeasureSpec(
                            0,
                            View.MeasureSpec.UNSPECIFIED
                        ),
                        View.MeasureSpec.makeMeasureSpec(
                            0,
                            View.MeasureSpec.UNSPECIFIED
                        )
                    )
                    poster_layout.layout(
                        0, 0, poster_layout.measuredWidth,
                        poster_layout.measuredHeight
                    )
                }
                poster_layout.draw(canvas)
            }

            if (shareType == SHARE_SAVE) {
                //保存bitmap
                downloadUtil.saveImageToGallery(bitmap, this)
            } else {
                shareWeChat(bitmap)
            }

            poster_layout.destroyDrawingCache() // 保存过后释放资源

        }
    }.run()

}

private fun shareWeChat(bitmap: Bitmap?) {

}


@RequiresApi(Build.VERSION_CODES.O)
private fun copyPixel() {
    val bitmap =
        Bitmap.createBitmap(poster_layout.width, poster_layout.height, Bitmap.Config.ARGB_8888)
    val location = IntArray(2)
    poster_layout.getLocationInWindow(location)
    val rect = Rect(
        location[0],
        location[1],
        location[0] + poster_layout.width,
        location[1] + poster_layout.height
    )
    PixelCopy.request(window, rect, bitmap,
        { copyResult ->
            if (copyResult == PixelCopy.SUCCESS) {
                if (shareType == SHARE_SAVE) {
                    //保存bitmap
                    downloadUtil.saveImageToGallery(bitmap, this)
                } else {
                    shareWeChat(bitmap)
                }

            }
        }, object : Handler() {
            override fun handleMessage(msg: Message?) {
                super.handleMessage(msg)

            }
        })
}