Android kotlin 保存网络图片到相册

 binding.qj.setOnClickListener {
            //下载图片
            Thread() {
                kotlin.run {
                    var url = "http://mpapk.yexi.online/2.jpg"
                    var xiazai = saveFile2Gallery2(applicationContext, url)
                    println("-----------xiazai------------")
                    println(xiazai)
                    println("----------xiazai-------------")
                }

            }.start()


        }
        requestPermission()
    }

// 保存图片到相册
    fun saveFile2Gallery2(context: Context, url: String): Boolean {
        val name = System.currentTimeMillis().toString()
        val photoPath = Environment.DIRECTORY_DCIM + "/Camera"
        val contentValues = ContentValues().apply {
            put(MediaStore.MediaColumns.DISPLAY_NAME, name)
            put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg")
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
                put(MediaStore.MediaColumns.RELATIVE_PATH, photoPath)//保存路径
                put(MediaStore.MediaColumns.IS_PENDING, true)
            }
        }
        //返回出一个URI
        val insert = context.contentResolver.insert(
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
            contentValues
        ) ?: return false
        println("--------------------------")
        println(insert)
        println("--------------------------")
        //这个打开了输出流  直接保存图片就好了
        context.contentResolver.openOutputStream(insert).use { os ->
            os ?: return false
            var x = download(url, os)
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
                contentValues.put(MediaStore.MediaColumns.IS_PENDING, false)
            }
            return x
        }
        return false
    }

    private fun download(url: String, os: OutputStream): Boolean {
        val url = URL(url)
        (url.openConnection() as HttpURLConnection).also { conn ->
            conn.requestMethod = "GET"
            conn.connectTimeout = 5 * 1000
            if (conn.responseCode == 200) {
                conn.inputStream.use { ins ->
                    val buf = ByteArray(2048)
                    var len: Int
                    while (ins.read(buf).also { len = it } != -1) {
                        os.write(buf, 0, len)
                    }
                    os.flush()
                }
                return true
            } else {
                return false
            }
        }
    }

 /**
     * request permission for the application
     */
    private fun requestPermission() {
        if (ActivityCompat.checkSelfPermission(
                this,
                Manifest.permission.WRITE_EXTERNAL_STORAGE
            ) != PackageManager.PERMISSION_GRANTED || ActivityCompat.checkSelfPermission(
                this,
                Manifest.permission.READ_EXTERNAL_STORAGE
            ) != PackageManager.PERMISSION_GRANTED
        ) {
            ActivityCompat.requestPermissions(
                this,
                arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE),
                1
            )
            ActivityCompat.requestPermissions(
                this,
                arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE),
                1
            )
        } else {
            Log.i(LOG_TAG, "-----------------permission ok")
        }
    }