Codename One：Android平台MediaPlayer权限请求问题咨询

Let's break down why this permission pop-up is appearing and walk through actionable fixes:

Root Causes #

Your video playback code triggers permission requests due to how Codename One's MediaPlayer interacts with underlying platform requirements:

• Android Default Permission Behavior: Codename One's media framework automatically includes common media-related permissions (like READ_EXTERNAL_STORAGE or READ_MEDIA_VIDEO for Android 13+) by default. Even though you're loading a video from your app's internal resources via getResourceAsStream, the framework doesn't distinguish between internal package assets and external storage media upfront—so it requests these permissions as a catch-all.
• Legacy Framework Logic: Older versions of Codename One had less granular permission handling for internal media, leading to unnecessary permission prompts even when accessing bundled resources.

Fixes & Workarounds #

Here's how to eliminate the unwanted permission requests:

1. Explicitly Remove Unneeded Permissions in Build Config #

Codename One lets you override default permissions in your codenameone_settings.properties file or IDE build settings. For Android, add this line to exclude storage permissions (since you're only using internal resources):

android.xpermissions=-android.permission.READ_EXTERNAL_STORAGE,-android.permission.READ_MEDIA_VIDEO

This tells the build process to strip these permissions from the final APK.

2. Validate Your Resource Setup #

Double-check that intro-landscape.mp4 is properly placed in your app's src directory (or designated resource folder) so it's bundled directly with the app. If the framework detects a missing resource, it might fall back to attempting external storage access, triggering permission prompts.

3. Upgrade to the Latest Codename One Version #

Newer releases of Codename One have improved permission handling that better distinguishes between internal package assets and external media. Upgrading to the latest stable version may resolve this issue automatically.

4. Manual Permission Handling (For Future Use Cases) #

If you ever need to access external media later in your app, you can request permissions only when necessary using Codename One's Permissions API:

Permissions.checkPermission(Permissions.STORAGE, () -> {
    // Proceed with external media access
}, () -> {
    // Show error message if permission is denied
});

This isn't needed for your current internal video use case, but it's useful for future media-related features.

内容的提问来源于stack exchange，提问作者Francesco Galgani