Develop Reference

How to rename image from gallery and save it?

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.

code 2067 SQLITE_CONSTRAINT_UNIQUE when working with Android MediaStorage

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
...
}

MEDIASTORE images, got nothing

I added the request premissions for reading files tried this method inside my activity but nothing shows,like there is no images in real devices and emulator,what am i doing wrong?
fun storaheread() {
val imageProjection = arrayOf(
MediaStore.Images.Media.DISPLAY_NAME,
MediaStore.Images.Media.SIZE,
MediaStore.Images.Media.DATE_TAKEN,
MediaStore.Images.Media._ID
)
val imageSortOrder = "${MediaStore.Images.Media.DATE_TAKEN} DESC"
val cursor = contentResolver.query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
imageProjection,
null,
null,
imageSortOrder
)
cursor.use {
it?.let {
val idColumn = it.getColumnIndexOrThrow(MediaStore.Images.Media._ID)
val nameColumn = it.getColumnIndexOrThrow(MediaStore.Images.Media.DISPLAY_NAME)
val sizeColumn = it.getColumnIndexOrThrow(MediaStore.Images.Media.SIZE)
val dateColumn = it.getColumnIndexOrThrow(MediaStore.Images.Media.DATE_TAKEN)
while (it.moveToNext()) {
val id = it.getLong(idColumn)
val name = it.getString(nameColumn)
val size = it.getString(sizeColumn)
val date = it.getString(dateColumn)
val contentUri = ContentUris.withAppendedId(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
id
)
// add the URI to the list
// generate the thumbnail
// val thumbnail = (this as Context).contentResolver.loadThumbnail(contentUri, Size(480, 480), null)
Log.d("image name",name)
}
} ?: kotlin.run {
Log.e("TAG", "Cursor is null!")
}
}
}

you can check out this similar question, it may help you achieve this situation.
Loading all the images from gallery into the Application in android

How to get images from phone on API below 29

I develop image gallery app for Android (min sdk 23, target sdk 29). And I trying to get list of photos from the phone. Here the code:
val list: MutableList<Photo> = mutableListOf()
val projection = arrayOf(
MediaStore.Images.Media._ID,
MediaStore.Images.Media.DATE_TAKEN,
MediaStore.Images.Media.ORIENTATION,
MediaStore.Images.Media.SIZE
)
val query = contentResolver?.query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
projection,
null,
null,
MediaStore.Images.Media.DATE_TAKEN + " DESC"
)
query?.use { cursor ->
if (cursor.count != 0) {
val idIndex = cursor.getColumnIndex(MediaStore.Images.Media._ID)
val sizeIndex = cursor.getColumnIndex(MediaStore.Images.Media.SIZE)
while (cursor.moveToNext()) {
val id = cursor.getLong(idIndex)
val size = cursor.getInt(sizeIndex)
val contentUri: Uri = ContentUris.withAppendedId(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
id
)
val photo = Photo(contentUri, size)
list.add(photo)
}
}
}
But Android Studio says to me that some MediaStore fields requires API level 29+. (e.g. MediaStore.Images.Media.DATE_TAKEN, MediaStore.Images.Media.ORIENTATION, MediaStore.Images.Media.DATA, etc.).
Screen from AS.
So my question is how do I should get images list on APIs below 29?
Also studio says same about contentResolver.loadThumbnail() method.
And adjacent question: is it possible in Android to retrieve list of photo albums? Or I should get list of all images and then run over it and pick out albums?

Try this, it's work even with API 29 :
private fun getAllImages(activity: Activity): ArrayList<Photo>? {
var cursor: Cursor? = null
var i = 0
val arrayList: ArrayList<Photo> = ArrayList()
if (cursor == null) {
val resolver = activity.contentResolver
cursor = resolver.query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
null,
null,
null,
null
)
if (cursor != null) {
while (i < cursor.count) {
cursor.moveToPosition(i)
val fieldIndex: Int = cursor.getColumnIndex(MediaStore.Images.Media._ID)
val id: Long = cursor.getLong(fieldIndex)
val imageUri =
ContentUris.withAppendedId(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, id)
arrayList.add(Photo("", imageUri))
i++
}
cursor.close()
}
}
return arrayList
}
data class Photo(var name: String, var uri: Uri)
Use any image loader library such as Glide or Picasso :
Glide.with(this).load(getAllImages(this)!![0].uri).into(imgView)
Add this permission to your manifest, and make sure it granted :
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

Load all images from contentProvider on Android 10

I am currently using the following code to load all images from the Android contentProvider in my repository:
override suspend fun getLocalImagePaths() = SuspendableResult.of<List<String>, Exception> {
val result = mutableListOf<String>()
val uri: Uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI
val projection = arrayOf(MediaStore.MediaColumns.DATA)
contentResolver.query(uri, projection, null, null, null)?.use {
val dataIndex = it.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA)
while (it.moveToNext()) {
result.add(it.getString(dataIndex))
}
}
result
}
This gets the absolute paths to all available images and it seems to work in Android 9, allthough some images can't be loaded (I am using Glide), but in Android 10 I can't load any of the image paths that are returned from the mentioned method. How could I do this?

override suspend fun getLocalImagePaths() = SuspendableResult.of<List<Uri>, Exception> {
val result = mutableListOf<Uri>()
val uri: Uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI
val projection = arrayOf(MediaStore.Images.Media._ID)
contentResolver.query(uri, projection, null, null, null)?.use {
while (it.moveToNext()) {
result.add(
ContentUris.withAppendedId(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
it.getLong(0)
)
)
}
}
result
}