From my own app I'm starting an Activity that needs to be in another process, declaring it in the manifest:
<activity
android:name="ActivityName"
android:process=":DifferentProcess"
android:label="@string/app_name"
android:theme="@style/AppTheme" />
And starting it with an Intent as usual.
This new Activity creation always shows a white screen between activities; it's OK on a device like Nexus 5X, but on low-end devices the white screen appears for 1-3 seconds.
Is there anything I can do about it? Either make it faster or show a "Loading..." view while the process starts up?