首頁猿問 `MediaStore.Media...

`MediaStore.MediaColumns.DATA` 已棄用，我應該使用什么列作為替代

Java

幕布斯7119047 2023-06-21 13:27:01

我想使用MediaStoreAPI 將媒體提供商的所有圖片加載到我的應用程序，但此列MediaStore.MediaColumns.DATA已棄用。那么，我可以使用什么來替代呢？我想更新以下代碼以刪除已棄用的MediaStore.MediaColumns.DATA列：fun ContentResolver.loadImagesPaths(): List<String> { val uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI val images = mutableListOf<String>() val projection = arrayOf(MediaStore.MediaColumns.DATA) query(uri, projection, null, null, null)?.use { cursor -> val dataColumn = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA) while (cursor.moveToNext()) { images += cursor.getString(dataColumn) } } return images}編輯：更新代碼：fun ContentResolver.loadImagesUris(): List<Uri> { val uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI val images = mutableListOf<Uri>() val projection = arrayOf(MediaStore.Images.Media._ID) query(uri, projection, null, null, null)?.use { cursor -> val idColumn = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID) while (cursor.moveToNext()) { images += ContentUris.withAppendedId(uri, cursor.getLong(idColumn)) } } return images}查看此鏈接，了解有關如何從共享存儲訪問媒體文件的更多詳細信息：https://developer.android.com/training/data-storage/shared/media

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5 回答

慕尼黑8549860

TA貢獻1818條經驗獲得超11個贊

我能夠將 MediaStore.MediaColumns.Data 替換為它自己的文件 ID（令人難以置信的是，文件具有 ID）并正確構建其 URI，如下所示：

fun getAllShownImagesPath(activity: Activity): MutableList<Uri> {

val uriExternal: Uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI

val cursor: Cursor?

val columnIndexID: Int

val listOfAllImages: MutableList<Uri> = mutableListOf()

val projection = arrayOf(MediaStore.Images.Media._ID)

var imageId: Long

cursor = activity.contentResolver.query(uriExternal, projection, null, null, null)

if (cursor != null) {

columnIndexID = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID)

while (cursor.moveToNext()) {

imageId = cursor.getLong(columnIndexID)

val uriImage = Uri.withAppendedPath(uriExternal, "" + imageId)

listOfAllImages.add(uriImage)

}

cursor.close()

}

return listOfAllImages

}

然后使用 Uri 在您的視圖中構建它！

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喵喵時光機

TA貢獻1846條經驗獲得超7個贊

仍然無法使用獲得的 Uri 加載圖像。?文檔建議使用 openFileDescriptor() ，我這樣做了，然后從中解碼圖像的位圖：

override fun loadImagesFromStorage(): List<AdapterImage> {

? ? val uri: Uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI

? ? val cursor: Cursor?

? ? val columnIndexId: Int

? ? val listOfAllImages = mutableListOf<AdapterImage>()

? ? val projection = arrayOf(MediaStore.Images.Media._ID)

? ? cursor = context.contentResolver

? ? ? ? .query( uri, projection, null, null, null)

? ? if ( cursor != null ){

? ? ? ? columnIndexId = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID)

? ? ? ? while (cursor.moveToNext()){

? ? ? ? ? ? val contentUri = ContentUris.withAppendedId(uri, cursor.getLong(columnIndexId))

? ? ? ? ? ? //here I open FileDescriptor and then decode it into Bitmap

? ? ? ? ? ? var image: Bitmap

? ? ? ? ? ? context.contentResolver.openFileDescriptor(contentUri, "r").use { pfd ->

? ? ? ? ? ? ? ? if( pfd != null ){

? ? ? ? ? ? ? ? ? ? image = BitmapFactory.decodeFileDescriptor(pfd.fileDescriptor)

? ? ? ? ? ? ? ? ? ? listOfAllImages.add(AdapterImage(image))

? ? ? ? ? ? ? ? }

? ? ? ? ? ? }

? ? ? ? }

? ? ? ? cursor.close()

? ? }

? ? return listOfAllImages

}

PS 我的方法將返回我稍后在應用程序中使用的 AdapterImage 對象列表，但此時您可以將任何需要的東西放在那里

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PIPIONE

TA貢獻1829條經驗獲得超9個贊

我終于通過創建這個類解決了這個問題

class FileHelper {

val mediaType = "multipart/form-data".toMediaTypeOrNull()

fun getPartBodyFromUri(context: Context, uri: Uri): MultipartBody.Part {

val realPath = getPathFromURI(context, uri)

val fileImage = createFile(realPath)

val requestBody = createRequestBody(fileImage)

return createPart(fileImage, requestBody)

}

private fun createFile(realPath: String): File {

return File(realPath)

}

private fun createRequestBody(file: File): RequestBody {

return file.asRequestBody(mediaType)

}

private fun createPart(file: File, requestBody: RequestBody): MultipartBody.Part {

return MultipartBody.Part.createFormData("imageFile", file.name, requestBody)

}

private fun getPathFromURI(context: Context, uri: Uri): String {

var realPath = String()

uri.path?.let { path ->

val databaseUri: Uri

val selection: String?

val selectionArgs: Array<String>?

if (path.contains("/document/image:")) { // files selected from "Documents"

databaseUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI

selection = "_id=?"

selectionArgs = arrayOf(DocumentsContract.getDocumentId(uri).split(":")[1])

} else { // files selected from all other sources, especially on Samsung devices

databaseUri = uri

selection = null

selectionArgs = null

}

try {

val column = "_data"

val projection = arrayOf(column)

val cursor = context.contentResolver.query(

databaseUri,

projection,

selection,

selectionArgs,

null

)

cursor?.let {

if (it.moveToFirst()) {

val columnIndex = cursor.getColumnIndexOrThrow(column)

realPath = cursor.getString(columnIndex)

}

cursor.close()

}

} catch (e: Exception) {

println(e)

}

return realPath

}

Media.DATA 已棄用，使用“MediaStore.Images.Media._ID”來獲取正確的列，但無法正常工作，因此我創建了我需要的列

val column = "_data"

val projection = arrayOf(column)

然后我使用 getColumnIndexOrThrow() 方法來獲取正確的索引

val columnIndex = cursor.getColumnIndexOrThrow(column)

realPath = cursor.getString(columnIndex)

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繁星點點滴滴

TA貢獻1803條經驗獲得超3個贊

在爪哇

FileInputStream input = null;

FileOutputStream output = null;

try {

String filePath = new File(getCacheDir(), "tmp").getAbsolutePath();

android.os.ParcelFileDescriptor pfd = getContentResolver ().openFileDescriptor(

sharedFileUri, "r");

if (pfd != null) {

FileDescriptor fd = pfd . getFileDescriptor ();

input = new FileInputStream (fd);

output = new FileOutputStream (filePath);

int read;

byte[] bytes = new byte[4096];

while ((read = input.read(bytes)) != -1) {

output.write(bytes, 0, read);

}

File sharedFile = new File(filePath);

String finalPath = sharedFile.getPath();

}

}catch(Exception ex) {

} finally {

try {

input.close();

output.close();

} catch (Exception ignored) {

}

反對回復 2023-06-21

鳳凰求蠱

TA貢獻1825條經驗獲得超4個贊

從內部存儲加載圖像。使用 MediaStore 類讀取包含圖像和視頻的所有文件夾。

并將結果作為 ArrayList 返回。

private fun getAllShownImagesPath(activity: Activity): ArrayList<Albums> {

val uri: Uri

val cursor: Cursor

var cursorBucket: Cursor

val column_index_data: Int

val column_index_folder_name: Int

val listOfAllImages = ArrayList<String>()

var absolutePathOfImage: String? = null

var albumsList = ArrayList<Albums>()

var album: Albums? = null

val BUCKET_GROUP_BY = "1) GROUP BY 1,(2"

val BUCKET_ORDER_BY = "MAX(datetaken) DESC"

uri = android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI

val projection = arrayOf(MediaStore.Images.ImageColumns.BUCKET_ID,

MediaStore.Images.ImageColumns.BUCKET_DISPLAY_NAME,

MediaStore.Images.ImageColumns.DATE_TAKEN,

MediaStore.Images.ImageColumns.DATA)

cursor = activity.contentResolver.query(uri, projection, BUCKET_GROUP_BY, null, BUCKET_ORDER_BY)

if (cursor != null) {

column_index_data = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA)

column_index_folder_name = cursor

.getColumnIndexOrThrow(MediaStore.Images.Media.BUCKET_DISPLAY_NAME)

while (cursor.moveToNext()) {

absolutePathOfImage = cursor.getString(column_index_data)

Log.d("title_apps", "bucket name:" + cursor.getString(column_index_data))

val selectionArgs = arrayOf("%" + cursor.getString(column_index_folder_name) + "%")

val selection = MediaStore.Images.Media.DATA + " like ? "

val projectionOnlyBucket = arrayOf(MediaStore.MediaColumns.DATA, MediaStore.Images.Media.BUCKET_DISPLAY_NAME)

cursorBucket = activity.contentResolver.query(uri, projectionOnlyBucket, selection, selectionArgs, null)

Log.d("title_apps", "bucket size:" + cursorBucket.count)

if (absolutePathOfImage != "" && absolutePathOfImage != null) {

listOfAllImages.add(absolutePathOfImage)

albumsList.add(Albums(cursor.getString(column_index_folder_name), absolutePathOfImage, cursorBucket.count, false))

}

return getListOfVideoFolders(albumsList)

}

// 該函數負責讀取所有文件夾中的所有視頻。

private fun getListOfVideoFolders(albumsList: ArrayList<Albums>): ArrayList<Albums> {

var cursor: Cursor

var cursorBucket: Cursor

var uri: Uri

val BUCKET_GROUP_BY = "1) GROUP BY 1,(2"

val BUCKET_ORDER_BY = "MAX(datetaken) DESC"

val column_index_album_name: Int

val column_index_album_video: Int

uri = android.provider.MediaStore.Video.Media.EXTERNAL_CONTENT_URI

val projection1 = arrayOf(MediaStore.Video.VideoColumns.BUCKET_ID,

MediaStore.Video.VideoColumns.BUCKET_DISPLAY_NAME,

MediaStore.Video.VideoColumns.DATE_TAKEN,

MediaStore.Video.VideoColumns.DATA)

cursor = this.contentResolver.query(uri, projection1, BUCKET_GROUP_BY, null, BUCKET_ORDER_BY)

if (cursor != null) {

column_index_album_name = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.BUCKET_DISPLAY_NAME)

column_index_album_video = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA)

while (cursor.moveToNext()) {

Log.d("title_apps", "bucket video:" + cursor.getString(column_index_album_name))

Log.d("title_apps", "bucket video:" + cursor.getString(column_index_album_video))

val selectionArgs = arrayOf("%" + cursor.getString(column_index_album_name) + "%")

val selection = MediaStore.Video.Media.DATA + " like ? "

val projectionOnlyBucket = arrayOf(MediaStore.MediaColumns.DATA, MediaStore.Video.Media.BUCKET_DISPLAY_NAME)

cursorBucket = this.contentResolver.query(uri, projectionOnlyBucket, selection, selectionArgs, null)

Log.d("title_apps", "bucket size:" + cursorBucket.count)

albumsList.add(Albums(cursor.getString(column_index_album_name), cursor.getString(column_index_album_video), cursorBucket.count, true))

}

return albumsList

}

反對回復 2023-06-21

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`MediaStore.MediaColumns.DATA` 已棄用，我應該使用什么列作為替代

`MediaStore.MediaColumns.DATA` 已棄用，我應該使用什么列作為替代