如何使用 Google Drive API 从 android 将加密的图像文件上传到 Google Drive

Question

我想将加密的图像文件从 Android 上传到用户特定的谷歌驱动器，还想在加载应用程序时解密图像。

Answer 1

当您显示来自谷歌驱动器的图像时。 您需要使用解密下载图像。

首先从谷歌驱动器 function 调用下载图像。`

 fun downloadFileFromGDrive(id: String) {
    getDriveService()?.let { googleDriveService ->
        CoroutineScope(Dispatchers.IO).launch {
            Log.e("idDownload", id)
            val file = File(context.filesDir, "${id}.jpg")
            if(!file.exists()) {
                try {
                    val gDriveFile = googleDriveService.Files().get(id).execute()
                    createDirectoryAndSaveImagePackage(gDriveFile.id)
                } catch (e: Exception) {
                    println("!!! Handle Exception $e")
                }
            }
        }
    } ?: ""
    //Toast.makeText(context, "Please Log In first!", LENGTH_SHORT).show()
}

并将其保存到应用程序私有文件夹中。

 fun createDirectoryAndSaveImagePackage(id: String?) {
    getDriveService()?.let { googleDriveService ->
        CoroutineScope(Dispatchers.IO).launch {
            val file = File(context.filesDir, "${id}.jpg")
            Log.e("fileEncryptedDirGD", "$file")
            try {
                val outputStream = FileOutputStream(file)
                googleDriveService.files()[id]
                    .executeMediaAndDownloadTo(outputStream)
                if (id != null) {
                    googleDriveService.readFile(id)
                }
                val decryptedDataDir = ImageCrypto().decryptFile("$file")
                Log.e("decryptedDataDir", decryptedDataDir)
                outputStream.flush()
                outputStream.close()

            } catch (e: Exception) {
                e.printStackTrace()
            }
        }
    }
}


  and display image jetpack compose.

有趣的显示图像（）{

val fileGD = File(context.filesDir, "${it1}.jpg") if (fileGD.exists()) { val decryptedData2 = ImageCrypto().decryptFile("$fileGD")

                                       val painterBitmap = rememberImagePainter(
                                        data = File(decryptedData2),
                                        builder = {
                                            crossfade(500)
                                        })

                                    val painterState = painterBitmap.state

                                    val painter =
                                        rememberImagePainter(
                                            data = File(decryptedData2),
                                            builder = {
                                                placeholder(R.drawable.placeholder)
                                                error(R.drawable.placeholder)
                                            })


                                    if (painterState is ImagePainter.State.Loading) {
                                        CircularProgressIndicator(
                                            modifier = Modifier.align(Alignment.Center),
                                            color = MaterialTheme.colors.secondary
                                        )

                                    } else {

                                        Image(
                                            painter = painter,
                                            contentScale = ContentScale.Inside,
                                            modifier = Modifier
                                                .width(200.dp)
                                                .height(100.dp)
                                                .padding(PADDING / 2),
                                            contentDescription = null,
                                        )
                                    }
                                   }
                                   }
  

Answer 2

使用下面的 function 它将在谷歌驱动器上上传加密的图像文件，并下载解密图像并将其保存到应用程序的私有文件夹中。

suspend fun uploadFileToGDrive(path: String?, sufix: String?): String {
    getDriveService()?.let { googleDriveService ->
        try {
            if (path != null) {
                Log.e("pathGD", path)
            }

            googleDriveService.fetchOrCreateAppFolder(
                context.getString(R.string.application_folder),
                preferenceHelper
            )
            val encryptedData = ImageCrypto().encryptFile("$path")
            Log.e("encryptedData", encryptedData)

            val actualFile = File(encryptedData)
            if (!actualFile.exists()) error("File $actualFile not exists.")
            val gFile = com.google.api.services.drive.model.File()
            // gFile.name = actualFile.name
            val formatter = SimpleDateFormat("yyyyMMddHHmmss")
            var dateString = formatter.format(Date())

            gFile.name = dateString + sufix
            gFile.parents = listOf(preferenceHelper.getFolderId())
          
            val fileContent = FileContent("image/jpeg", actualFile)
            val create = googleDriveService.files().create(gFile, fileContent)
                .setFields("id, parents")
                .execute()
            driveFilePathId = create.id

        } catch (exception: Exception) {
            exception.printStackTrace()
        }
    } ?: ""
   Toast.makeText(context, "Please Log In first!", LENGTH_LONG).show()
    return driveFilePathId
}

我已经在我的 github 配置文件上使用 AES 上传了加密和解密图像。 请检查。

https://github.com/meshramaravind/FileEncryptedAES