I've seen a lot of people ask questions related to this, but they were all written in Java and they all use the method getContentResolver().loadThumbnail(imageUri, thumbSize, null);, but how to use loadThumbnail() in Kotlin?
Here is my attempt:
while (cursor.moveToNext()) {
val id = cursor.getLong(idColumn)
val displayName = cursor.getString(displayNameColumn)
val album = cursor.getString(albumColumn)
val albumId = cursor.getLong(albumIdColumn)
val duration = cursor.getString(durationColumn)
val contentUri = ContentUris.withAppendedId(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, id
)
val albumUri = ContentUris.withAppendedId(
MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI, albumId
)
val albumCover = ContentResolver().loadThumbnail(
albumUri,
Size(100, 100),
null
)
val song = Song(id, displayName, album, albumId, duration, contentUri, albumUri,
albumCover.asImageBitmap())
songs += song
Log.v(TAG, "Added song：${song.displayName}")
}
Then Android studio prompted me with an error about ContentResolver():
Cannot create an instance of an abstract class
So how do I use loadThumbnail() appropriately?
Thank you!
Related
I am having difficulty in importing music files in android. Problem is: I want to get all the music on the phone, but it doesn't work, only some of them are coming.
Hello, I am having difficulty in importing music files in android. Problem is: I want to get all the music on the phone, but it doesn't work, only some of them are coming.Why not coming ?
val arrayList: ArrayList<AudioModel> = ArrayList<AudioModel>()
val projection = arrayOf(
Audio.Media._ID,
Audio.Media.DISPLAY_NAME,
Audio.Media.DURATION,
Audio.Media.SIZE
)
val selection = Audio.Media.DISPLAY_NAME +
" >= ?"
val selectionArgs = arrayOf(TimeUnit.MILLISECONDS.convert(5, TimeUnit.MINUTES).toString())
val sortOrder = Audio.Media.DISPLAY_NAME + " ASC"
val cursor: Cursor? = activity?.contentResolver?.query(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
projection,
selection,
selectionArgs,
sortOrder
)
val idColumn = cursor!!.getColumnIndexOrThrow(Audio.Media._ID)
val nameColumn = cursor!!.getColumnIndexOrThrow(Audio.Media.DISPLAY_NAME)
val durationColumn = cursor!!.getColumnIndexOrThrow(Audio.Media.DURATION)
val sizeColumn = cursor!!.getColumnIndexOrThrow(Audio.Media.SIZE)
while (cursor.moveToNext()) {
val id = cursor.getLong(idColumn)
val name = cursor.getString(nameColumn)
val duration = cursor.getInt(durationColumn)
val size = cursor.getInt(sizeColumn)
val contentUri = ContentUris.withAppendedId(
Audio.Media.EXTERNAL_CONTENT_URI, id
)
// Stores column values and the contentUri in a local object
// that represents the media file.
arrayList.add(AudioModel(contentUri.toString(),name,duration))
}
I use this function to show images from specific album in gallery:
fun findImagesInAlbum(albumId: String): List<Image> {
val contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI
val projections = arrayOf(
MediaStore.Images.ImageColumns._ID,
MediaStore.Images.ImageColumns.BUCKET_DISPLAY_NAME,
MediaStore.Images.ImageColumns.DATE_TAKEN,
MediaStore.Images.ImageColumns.DISPLAY_NAME
)
val selection = "${MediaStore.Images.ImageColumns.BUCKET_ID} == ?"
val selectionArgs = arrayOf(albumId)
val findImages = HashMap<String, Image>()
contentResolver.query(contentUri, projections, selection, selectionArgs,
"${MediaStore.Images.ImageColumns.DATE_TAKEN} ASC")?.use { cursor ->
if (cursor.moveToFirst()) {
val idIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.ImageColumns._ID)
val displayNameIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.ImageColumns.DISPLAY_NAME)
do {
val mediaId = cursor.getLong(idIndex)
val filename = cursor.getString(displayNameIndex)
val uri = ContentUris.withAppendedId(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
mediaId
)
val image = Image(
id = mediaId.toString(),
name = filename,
uri = uri,
count = 0,
)
findImages[mediaId.toString()] = image
image.count++
} while (cursor.moveToNext())
}
}
return findImages.values.toList().sortedByDescending { it.name }
}
I show the List<Image> at the RecyclerView and it works fine. After clicking on image it opens on fullscreen. What functions can i use to rename an opened image and save its name in the phone storage?
I tried to solve this problem with DocumentsContract.renameDocument, but it throws error: java.lang.UnsupportedOperationException: Unsupported call: android:renameDocument.
Thanks for read this question.
I'm new to Android development.
In my project,I'm trying to access video file in shared storage.
To accomplished the purpose,I wrote the below code.
In the code, ContentResolver's query method is unresolved.I don't understand why.
val query = ContentResolver.query( <-Unresolved
collection,
projection,
selection,
selectionArgs,
sortOrder
)
query?.use{
cursor ->
val idColumn = cursor.getColumnIndexOrThrow(MediaStore.Video.Media._ID)
val nameColumn = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DISPLAY_NAME)
val durationColumn = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.SIZE)
while(cursor.movieToNext()){
val id = cursor.getLong(idColumn)
val name = cursor.getString(nameColumn)
val duration = cursor.getInt(durationColumn)
val size = cursor.getInt(sizeColumn)
val contentUri: Uri = ContentUris.withAppendedId(
MediaStore.Video.Media.EXTERNAL_CONTENT_URI,
id)
videoList += Video(contentUri, name, duration, size)
}
So coule someone please explaine to me the reason.Thank you.
The following code is used to save files from the app to downloads:
Uri collection = MediaStore.Downloads.EXTERNAL_CONTENT_URI;
ContentValues values = new ContentValues();
values.put(MediaStore.Downloads.DISPLAY_NAME, filename);
values.put(MediaStore.Downloads.MIME_TYPE, mimeType);
values.put(MediaStore.Downloads.RELATIVE_PATH, Environment.DIRECTORY_DOWNLOADS);
ContentResolver contentResolver = context.getApplicationContext().getContentResolver();
Uri uri = contentResolver.insert(collection, values);
OutputStream outputStream = context.getApplicationContext().getContentResolver().openOutputStream(uri, "w");
Everything is saved, however, if you delete the file from downloads manually, and then try to download it again from the application, an error appears:
android.database.sqlite.SQLiteConstraintException: UNIQUE constraint failed: files._data (code 2067 SQLITE_CONSTRAINT_UNIQUE[2067])
Is there a way to fix this or will I have to use unique names for each download?
This error happens because the machanism of OS: if we delete manually a file (media), its database will not be deleted immediately. Until we restart device.
Have a approach for this problem (still not be optimized - hope receiving sharing from people), such as:
Step 1: Get info of file via its name
Step 2: Ask OS to update its database via MediaScannerConnection.scanFile
Step 3: Use current code that has above problem
Codes for steps (collected on internet)
Step 1:
fun findByFileName(fileName: String): MutableList<FileInfo> {
val files = mutableListOf<FileInfo>()
val collection =
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
MediaStore.Video.Media.getContentUri(MediaStore.VOLUME_EXTERNAL)
} else {
MediaStore.Video.Media.EXTERNAL_CONTENT_URI
}
val projection = arrayOf(
MediaStore.Video.Media._ID,
MediaStore.Video.Media.DISPLAY_NAME,
MediaStore.Video.Media.DURATION,
MediaStore.Video.Media.SIZE,
MediaStore.Video.Media.DATA
)
val selection = "${MediaStore.Video.Media.DISPLAY_NAME} LIKE ?"
val selectionArgs = arrayOf(
fileName
)
// Display videos in alphabetical order based on their display name.
val sortOrder = "${MediaStore.Video.Media.DISPLAY_NAME} ASC"
val query = context.contentResolver.query(
collection,
projection,
selection,
selectionArgs,
sortOrder
)
query?.use { cursor ->
// Cache column indices.
val idColumn = cursor.getColumnIndexOrThrow(MediaStore.Video.Media._ID)
val nameColumn =
cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DISPLAY_NAME)
val durationColumn =
cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DURATION)
val sizeColumn = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.SIZE)
val dataColumn = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA)
while (cursor.moveToNext()) {
// Get values of columns for a given video.
val id = cursor.getLong(idColumn)
val name = cursor.getString(nameColumn)
val duration = cursor.getInt(durationColumn)
val size = cursor.getInt(sizeColumn)
val data = cursor.getStringOrNull(dataColumn)
val contentUri: Uri = ContentUris.withAppendedId(
MediaStore.Video.Media.EXTERNAL_CONTENT_URI,
id
)
// Stores column values and the contentUri in a local object
// that represents the media file.
files += FileInfo(contentUri, name, duration, size, data)
}
}
return files
}
data class FileInfo(
val uri: Uri,
val name: String,
val duration: Int,
val size: Int,
val data: String? = null
)
Step 2 + Step 3:
val exitedData = findByFileName(fileName = name)
if (exitedData != null) {
MediaScannerConnection.scanFile(context, arrayOf(exitedData.first().data.toString()), null, object: MediaScannerConnection.OnScanCompletedListener {
override fun onScanCompleted(path: String?, uri: Uri?) {
// Step 3
// Use current code have this problem
...
}
}
} else {
// Save file normally
// Use current code have this problem
...
}
I am using DownloadManager to download a video in the Downloads directory. Once the video is downloaded, I query the download directory using MediaStore. The problem is that I am getting the video that was downloaded last to second instead of the latest one.
Video Download Code
val request = DownloadManager.Request(Uri.parse(downloadUrl))
.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE)
.setDestinationInExternalPublicDir(
Environment.DIRECTORY_DOWNLOADS,
"MyApp/CategoryOne/123.mp4"
)
.setTitle(fileName)
.setDescription(context.getString(R.string.all_text_downloading))
val downloadManager =
context.getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
val downloadID = downloadManager.enqueue(request)
var isDownloadFinished = false
var downloadProgress: Int
while (!isDownloadFinished) {
val cursor: Cursor =
downloadManager.query(DownloadManager.Query().setFilterById(downloadID))
if (cursor.moveToFirst()) {
when (cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS))) {
DownloadManager.STATUS_FAILED -> {
isDownloadFinished = true
emit(State.error(context.getString(R.string.all_error_download_failed)))
}
DownloadManager.STATUS_PAUSED -> {
}
DownloadManager.STATUS_PENDING -> {
}
DownloadManager.STATUS_RUNNING -> {
val totalSizeInBytes: Long =
cursor.getLong(cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES))
if (totalSizeInBytes >= 0) {
val downloadedBytes: Long =
cursor.getLong(cursor.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR))
downloadProgress =
(downloadedBytes * 100L / totalSizeInBytes).toInt()
emit(State.downloading(downloadProgress))
}
}
DownloadManager.STATUS_SUCCESSFUL -> {
downloadProgress = 100
emit(State.downloading(downloadProgress))
isDownloadFinished = true
val downloadedVideo = getDownloadedVideo()
emit(State.success(true))
}
}
}
}
MediaStore Code
fun getDownloadedVideo(): MediaStoreVideo {
lateinit var mediaStoreVideo: MediaStoreVideo
val projection = arrayOf(
MediaStore.Video.Media._ID,
MediaStore.Video.Media.DISPLAY_NAME,
MediaStore.Video.Media.SIZE,
MediaStore.Video.Media.DATE_ADDED
)
val selection =
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) "${MediaStore.Video.Media.RELATIVE_PATH} like ? " else "${MediaStore.Video.Media.DATA} like ? "
val selectionArgs =
arrayOf("%MyApp/CategoryOne%")
val sortOrder = "${MediaStore.Images.Media.DATE_ADDED} DESC"
context.contentResolver.query(
MediaStore.Video.Media.EXTERNAL_CONTENT_URI,
projection,
selection,
selectionArgs,
sortOrder
)?.use { cursor ->
val idColumn = cursor.getColumnIndexOrThrow(MediaStore.Video.Media._ID)
val dateAddedColumn =
cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATE_ADDED)
val displayNameColumn =
cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DISPLAY_NAME)
val sizeColumn = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.SIZE)
if (cursor.moveToFirst()) {
val id = cursor.getLong(idColumn)
val contentUri = ContentUris.withAppendedId(
MediaStore.Video.Media.EXTERNAL_CONTENT_URI,
id
)
val displayName = cursor.getString(displayNameColumn)
val size = cursor.getLong(sizeColumn)
val dateAdded =
Date(TimeUnit.SECONDS.toMillis(cursor.getLong(dateAddedColumn)))
mediaStoreVideo = MediaStoreVideo(id, contentUri, displayName, size, dateAdded)
}
}
return mediaStoreVideo
}
This is the approach that I have followed to get the info of the video that is last downloaded by my app using DownloadManager. Also, I am not sure if this is the best approach to do the same. Any help will be appreciated. Thanks
After a bit of testing, I think it takes a few milliseconds before the entry is added to the MediaStore. I added a delay of 1000 ms and everything works now as expected.
However, this is a temporary solution and if someone can suggest a better approach, it would be more helpful.