How to open already opened activity instead of creating new one?

Question

I have two activities with \"navigation menu\" which has items for launching Activity1 and Activity2. For example we starts Activity2 from Activity1 and then we want open Ac

Answer 1

add android:launchMode="singleTop" to your activity in the Manifest.xml

Check this out about different launchModes also mind this:

As shown in the table above, standard is the default mode and is appropriate for most types of activities. SingleTop is also a common and useful launch mode for many types of activities. The other modes — singleTask and singleInstance — are not appropriate for most applications, since they result in an interaction model that is likely to be unfamiliar to users and is very different from most other applications