Android Pie (9.0) WebView in multi-process

Question

Starting Android Pie (API 28), Google isn\'t allowing using a single WebView instance in 2 different processes.

Documentation: https://developer.android.com/referenc

Answer 1

To summarize the fix with all the improvements, this is the code in Kotlin:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
    if (packageName != Application.getProcessName()) {
        WebView.setDataDirectorySuffix(Application.getProcessName())
    }
}

Add it to your Application class to onCreate() method.

Note this is will only fix problem with maximum 2 processes. If your app is using more, you have to provide different WebView suffix for each of them.