Add tauri-plugin-webview-upgrade as a git submodule under
apps/readest-app/src-tauri/plugins/. On Android devices whose system
WebView is locked to an old Chromium build (Huawei phones, Moaan / Onyx
/ Kobo e-ink readers, AOSP forks without Play Store, etc.), the reader
bundle renders as a blank screen. The plugin bootstraps before
Application.onCreate via androidx.startup and redirects the in-process
WebView loader to a recent com.google.android.webview when the user has
one sideloaded — opening the only window in which WebViewUpgrade can
swap the provider, before Tauri/Wry creates any WebView.
Thresholds (minUpgradeMajor / minSupportedMajor) come from
plugins.webview-upgrade in tauri.conf.json and are baked into Kotlin
constants at Gradle build time. Below the supported threshold with no
upgrade option, the plugin shows a localized AlertDialog (15 languages,
English fallback) prompting the user to install Android System WebView.
Plugin source: https://github.com/readest/tauri-plugin-webview-upgrade
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Huang Xin
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