关于Storage Access Framework(SAF)配置Extra参数的文档查询及SVG文件默认显示文件名需求咨询

1. Where to find official docs for SAF-specific Intent extras? #

The official documentation for SAF-related Intent extras lives in a few key spots within Android's developer resources:

• Start with the Intent class reference – many standard extras are defined as constants here, especially those tied to document picker actions like ACTION_OPEN_DOCUMENT.
• Next, dive into the dedicated Storage Access Framework guide; it covers core functionality and calls out common extras used to tweak picker behavior.
• You’ll also want to review the DocumentsContract class reference, as it includes constants and extras specific to document provider interactions – this is where you’ll find details on options like your android.content.extra.SHOW_ADVANCED.

Keep in mind that some device manufacturers might add custom extras for their pre-installed file pickers, but these won’t be part of official Android docs. Stick to framework-defined constants for cross-device compatibility.

2. How to ensure the file picker defaults to showing filenames (for SVG files without thumbnails)? #

Unfortunately, the default display mode (thumbnail vs. filename) of the SAF file picker is controlled by the app that provides it (either the system’s default file manager or a third-party one) – there’s no official, cross-device guaranteed way to force it to show filenames via Intent extras. That said, here are practical steps you can take:

• Check for device-specific tweaks: Some manufacturers offer hidden or undocumented extras to control the picker’s view mode. These aren’t reliable across all devices, but they’re worth testing if you target specific hardware.
• Clarify post-selection: Even if the picker doesn’t show filenames by default, once the user selects an SVG file, display the filename prominently in your app’s UI right away. This eliminates confusion about which file was chosen.
• Custom picker as a fallback: If consistent UI behavior is critical, build a custom file picker that uses SAF under the hood but lets you control display logic directly. This way, you can always show filenames alongside (or instead of) thumbnails for SVG files.

Note that newer Android versions (Android 11+) have improved file picker UIs that often default to showing filenames alongside thumbnails, even for file types without previews.

内容的提问来源于stack exchange，提问作者takluiper