Android下载到本地的图片在相册显示

 /**
     * 将图片在相册显示
     */
    private fun updatePhotoAlbum(bitmap: Bitmap, file: File) {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
            val values = ContentValues()
            values.put(MediaStore.Images.Media.DATA, file.absolutePath)
            values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg")
            //将项直接插入到MediaStore 将自动扫描它们
            val uri: Uri? = contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values)
        } else {
            MediaScannerConnection.scanFile(this, arrayOf(file.absolutePath), arrayOf("image/png")) { _, _ ->
                object : Thread() {
                    override fun run() {
                        super.run()
                        saveBitmap(bitmap)
                    }
                }.start()
            }
        }
    }


    @RequiresApi(Build.VERSION_CODES.Q)
    fun saveBitmap(bitmap: Bitmap) {
        val values = ContentValues()
        values.put(MediaStore.Images.Media.DESCRIPTION, "This is an image")
        values.put(MediaStore.Images.Media.DISPLAY_NAME, "Image.png")
        values.put(MediaStore.Images.Media.MIME_TYPE, "image/png")
        values.put(MediaStore.Images.Media.TITLE, System.currentTimeMillis().toString() + ".png")
        values.put(MediaStore.Images.Media.RELATIVE_PATH, "DCIM/Camera")
        val external = MediaStore.Images.Media.EXTERNAL_CONTENT_URI
        val resolver: ContentResolver = contentResolver
        val insertUri: Uri? = resolver.insert(external, values)
        var os: OutputStream? = null
        if (insertUri != null) {
            try {
                os = resolver.openOutputStream(insertUri)
                bitmap.compress(Bitmap.CompressFormat.PNG, 90, os)
            } catch (e: IOException) {
                e.printStackTrace()
            } finally {
                try {
                    os?.close()
                } catch (e: IOException) {
                    e.printStackTrace()
                }
            }
        }
    }