Android: how to determine cold start

android cold-start
Jason Yu picture Jason Yu · Aug 22, 2013 · Viewed 10.6k times · Source

When app being launched, how to determine it is cold start or not? By cold start, I mean the app launched from the very beginning, instead of just resumed from a previous state.

:Edit: elaborate my question: I'm trying to find the app's launch mode: cold start or warm start. Cold start means the app is never launched before or not in background, so it needs a complete launch. Warm start means it is still in background, so it can resume and start faster. How to distinguish these two start modes programmatically?

Answer

DisibioAaron picture DisibioAaron · Sep 3, 2013

If the app is still running in the background it will call onResume first and not onCreate at all.

If you mean the first time it was ever launched on a device then use sqlite or shared preferences to store data and at the beginning check to see if its there.

Related questions

Android - Prevent white screen at startup

As we all know, many Android apps display a white screen very briefly before their first Activity comes into focus. This problem is observed in the following cases: Android apps that extend the global Application class and perform major initializations …

Read More
Android emulator - Don't save state by default

In the latest update for Android studio, the emulator has started saving snapshots of the current state of the device by default and going back to that snapshot when reopened, which is not the behavior that I want. How can …

Read More
Can't start Eclipse - Java was started but returned exit code=13

I am trying to get my first taste of Android development using Eclipse. I ran into this problem when trying to run Eclipse, having installed version 4.2 only minutes ago. After first trying to start Eclipse without any parameters to specify …

Read More