More significantly, installing a locally compiled APK won't work, since the on-device WebViewUpdateService will immediately uninstall such updates. If you have an Android build from N-P (and, it uses the Google WebView configuration), then the package will be disabled by default. This functionality was added in N and removed in Q, so you should skip this if your device is L-M or >= Q. If the script doesn't work, see the manual steps. If you're using an emulator, make sure to start it with -writable-system before removing the preinstalled WebView. See internal instructions for the Google-internal variants of the build targets ( system_webview_google_apk, monochrome_apk, trichrome_webview_google_apk). Because this not accepted by any build of the OS, you’ll want to change this with the GN arg chrome_public_manifest_package = ".chrome", or choose system_webview_apk instead. Monochrome_public_apk‘s package name defaults to. Otherwise, you can change the package name for either target by setting the system_webview_package_name GN arg (ex. If your device allows this package name, continue to the next section. System_webview_apk and trichrome_webview_apk use as their package name by default. Depending on the chosen build target, you may need to change the package name to match one of the following: API levelĬom.android.webview (default, preinstalled)Ĭom. (default, preinstalled)Ĭom.android.chrome (default, preinstalled)Ĭom. (only userdebug/eng)Ĭom. (preinstalled) (see Important notes for N-P)Ĭom. (only userdebug/eng) One of the consequences of this is that the WebView implementation on the device can only be provided by a predetermined set of package names (see details). Unlike most Android apps, WebView is part of the Android framework. Tip: building trichrome_webview_apk will automatically build its dependencies (i.e., trichrome_library_apk). TODO( ): document the differences between each target.įirst, you should figure out your device's integer API level, which determines which build targets will be compatible with the version of the OS on your device: adb shell getprop ro. Similarly to Chrome, WebView can be compiled with a variety of build targets. System_webview_package_name = "." # Optional: speeds up fresh builds (Googlers-only) ![]() Target_cpu = "arm64" # Not always necessary, see "Changing package name" below Setting up the buildĬonfigure GN args (run gn args out/Default) as follows: target_os = "android" # See "Figuring out target_cpu" below Installing build dependencies and running hooksįor the minimum requirements, please see Device Setup.Getting the code or converting a Linux checkout.You need to install on a preview Android release.You want to use the “downstream” targets (ex.You work on features depending on this closed-source code.While this is sufficient for most cases, Googlers may wish to consult internal instructions to get a checkout including closed-source code, which is necessary if: This is meant to be a comprehensive guide for building WebView, within the limits of what is possible in a public chromium checkout. ![]() Installing WebView and switching provider.
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