A content provider manages access to a central repository of data. A provider| Android Developers
To give users more control over their files and limit file clutter,| Android Developers
The QIODevice class is the base interface class of all I/O devices in Qt.| doc.qt.io
The QFile class provides an interface for reading from and writing to files.| doc.qt.io
The QDir class provides access to directory structures and their contents.| doc.qt.io
On devices that run Android 4.4 (API level 19) and higher, your app can interact| Android Developers
Android allows your app to do work in the background. Here's how.| Android Developers
The QFileDialog class provides a dialog that allows users to select files or directories.| doc.qt.io
A platform-independent mechanism for shipping resource files in an application.| doc.qt.io
The QDataStream class provides serialization of binary data to a QIODevice.| doc.qt.io
The QByteArray class provides an array of bytes.| doc.qt.io
The QString class provides a Unicode character string.| doc.qt.io