miguelpruivo/flutter_file_picker
Flutter File Picker
Flutter File Picker is a cross-platform file selection library that integrates native operating system dialogs into applications. It allows users to pick single or multiple files from device storage or connected cloud services, select directories, and open save-as dialogs to export data.
The library handles file operations by invoking host platform system dialogs directly without custom UI rendering. It supports filtering selectable files through preset media categories or custom file extensions, loading file bytes directly into memory as raw data, and streaming large files through incremental chunks to prevent application crashes. Additionally, it includes functionality to purge residual temporary files generated during the selection lifecycle to reclaim storage space.
Features
- File Save Dialogs - Displays a native save dialog allowing users to specify a destination directory and filename for exporting data.
- File Pickers - Opens native file dialogs to pick files, select directories, and save data across platforms.
- Cross-Platform App Development - Builds mobile, desktop, and web applications from a single codebase while accessing native device features.
- Save Location Provisioning - Opens a save-as dialog allowing users to choose a destination path and file name for exporting data.
- System Dialog Folder Selection - Opens a native folder selection dialog that returns the absolute path of the chosen directory.
- Cross-Platform File Pickers - Provides a cross-platform file selection library that opens native device dialogs.
- Cloud Storage File Uploads - Uploads local files or cloud documents to custom storage destinations.
- Cloud Attachment Selection - Opens native operating system pickers to let users choose files from device storage or connected cloud services.
- Multiple File Selection - Launches the native file picker dialog to let users choose single or multiple files with extension filters.
- System Dialog Invocations - Triggers host platform system dialogs directly to handle file selection and directory browsing without custom UI.
- Platform Channel Communications - Invokes native operating system pickers by passing control messages across a cross-platform communication channel.
- Local File Selection - Opens the operating system native file browser so users can choose single or multiple files from device storage.
- Local Storage Directory Prompts - Prompts the user to pick a folder path from the device storage for batch operations or saving data.
- Memory-Efficient Data Streaming - Processes large file selections through incremental chunk streams instead of loading entire payloads into memory.
- Streaming File Reads - Processes large files through memory-efficient data streams instead of loading entire contents at once.
- File Format Filtering - Restricts selectable files using preset media categories or custom file extensions to ensure valid formats.
- Media File Loading - Reads selected file bytes directly into memory as raw data for immediate processing or remote uploading.
- File Selection Components - Integrates native file browsers and save dialogs across mobile, desktop, and web targets.
- File Byte Buffer Loading - Reads selected file content directly into raw application memory buffers for immediate processing or transmission.
- File Extension Filters - Enforces format restrictions using preset media categories or custom file extensions during file selection.
- File Type Tag Filters - Restricts the file picker to specific formats or categories such as images, audio, or video.
