Some budy can you give me a best solutions.
you should download the most recent Android JS package since it includes new and really simple samples.
If I understood you correctly you want to immediately start the App into AR?
To do this you only have to create a ArchitectView, and call its lifecycle methods. This can be seen in SimpleArActivity.java that is included in the 7.1 package.
You have to make sure that you have camera permissions before you call ArchitectView.onCreate if you app targets android 23+.