Android emulate home key launch intent

Question

In some Emulators, if the user presses the home key in the launcher, it does a different task than if you switch to it from another app:

For example, if the user presses home, it launches home. But if the user presses home again in the launcher, it opens the app drawer.

I am wondering how this can be done? I tried to emulate the home launch intent by setting intent action as ACTION_MAIN and category as CATEGORY_HOME to no avail.

Answer 1

The short answer is that when an Activity is already in memory, then the new call to startActivity() will result in Activity.onNewIntent() being called, rather than the usual onCreate() method.

• 1 click goes to onCreate()
• 2 clicks go to onNewIntent()

So you can implement this behaviour by overriding the onNewIntent() method.

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For the long answer, rather look at a full description of the problem at this link:

• Android launcher press home in launcher to go to default screen

I can not say it better than this.