how anyone create the launcher apps!??

Answer 1

launcher app is created like a normal app but in manifest file you have to add 2 categories intent

<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.HOME" />

These will make your app run when home button is pressed and act like a launcher app.

There are also many sample launcher apps you can easily find them if you google a bit.

Answer 2

okay, thank you so much