android studio preview on separate window

Zygote is an important invention in Android.

Now spawning a new ready-to-use process in Android simply requires forking the Zygote process which is way more efficient and time saving than creating a new process from scratch. This instance of Dalvik VM preloads a bunch of classes, Drawables and Colour State Lists from the SDK and is used as the seed process from which all instances will be derived.

The Zygote technique creates an initial process at boot time running a Dalvik VM. Android invented a new way of reducing this time called Zygote. This thread is called UI thread or Main thread. But in Android, for every app launch, initialising a process running a new instance of Dalvik VM from scratch takes time. Once started, the Dalvik VM will, in turn, initialise a thread in which most of your code will be executed. When we start a new application on Android basically it needs a new process to be created which will run a new instance of a Dalvik VM. This is an annoying and undesirable situation which we can handle following the process explained in this blog. When we tap on an app icon to launch the app, first we see a white or grey (depending on the default theme) screen for a second or two, before actual application launch.

Android studio preview on separate window