Pro Android with Kotlin

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CHAPTER 6: Content Providers

delete(url: Uri, where: String, selectionArgs: Array): Int
This deletes records.

update(uri: Uri, values: ContentValues, where: String, 
selectionArgs: Array): Int
This updates records.

query(uri: Uri, projection: Array, queryArgs: Bundle, 
cancellationSignal: CancellationSignal): Cursor
This queries content according to the parameters given.

query(uri: Uri, projection: Array, selection: 
String, selectionArgs: Array, sortOrder: String, 
cancellationSignal: CancellationSignal): Cursor
This queries content according to the parameters given.

query(uri: Uri, projection: Array, selection: String, 
selectionArgs: Array, sortOrder: String): Cursor
This queries content according to the parameters given.
Their signatures and meanings closely relate to the corresponding ContentProvider 
methods, as covered earlier. Also, take a look at the online API reference.
To instead access file content, you can use one of the following methods:

openAssetFileDescriptor(uri: Uri, mode: String, 
cancellationSignal: CancellationSignal): AssetFileDescriptor
This opens the inner (asset) file.

openAssetFileDescriptor(uri: Uri, mode: String): 
AssetFileDescriptor
This opens the inner (asset) file, with no cancellation signal.

openTypedAssetFileDescriptor(uri: Uri, mimeType: String, 
opts: Bundle, cancellationSignal: CancellationSignal): 
AssetFileDescriptor
This opens the typed inner (asset) file.

openTypedAssetFileDescriptor(uri: Uri, mimeType: String, opts: 
Bundle): AssetFileDescriptor
This opens the typed inner (asset) file, with no cancellation signal.

openFileDescriptor(uri: Uri, mode: String, cancellationSignal: 
CancellationSignal): ParcelFileDescriptor
This opens the file.

openFileDescriptor(uri: Uri, mode: String): ParcelFileDescriptor
This opens the file, with no cancellation signal.

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