Is there a way to trigger an activity on a chrome custom tabs resume?

Question

I don't think there's a way to do this but I wanted to double check.

I have some web content being loaded in a chrome custom tab, and the content could be sensitive in nature.

The android app has a PIN screen, which we would like to show when the custom tab resumes, but I don't see any way to do this, or believe it's possible.

Can this be done with custom tabs, or will the web app need to implement their own PIN screen?

Answer 1

There's a callback when you bind a custom tab service that will alert you when a tab is shown (5) / hidden (6)

CustomTabsServiceConnection customTabsServiceConnection = new CustomTabsServiceConnection() {
            @Override
            public void onCustomTabsServiceConnected(ComponentName componentName, CustomTabsClient customTabsClient) {
                client = customTabsClient;
                client.warmup(0L);
                customTabsSession = client.newSession(new CustomTabsCallback() {
                    @Override
                    public void onNavigationEvent(int navigationEvent, @Nullable Bundle extras) {
                        super.onNavigationEvent(navigationEvent, extras);
                    }
            }
}

You can then bind this and the callbacks will start triggering when you use it when launching your tabs (SDK <= 29, it will be different on 30)

    String packageName = CustomTabsClient.getPackageName(this, null);
    boolean didSucceed = CustomTabsClient.bindCustomTabsService(this, packageName, mCustomTabsServiceConnection);

    CustomTabsIntent.Builder builder = new CustomTabsIntent.Builder(customTabsSession);