Android is being keep developed but the latest update to Android M is totally different since there is some major change that would change everything like new Runtime Permission. Surprisingly it is not much talked about in Android Developer community even though it is extremely important and may cause some big trouble in the near future.
Android’s permission system is one of the greatest security concern from the start since those consents are requested at introduce time. Once introduced, the application will have the capacity to get to all of things allowed with no client’s affirmation what precisely application does with the consent.
In Android 6.0 Marshmallow, application will not be granted any permission at installation time. Instead, application has to ask user for a permission one-by-one at runtime.
Please note that permission request dialog not launch automatically. Developer has to call for it manually. In the case that developer try to call some function that requires a permission which user has not granted yet, the function will suddenly throw an Exception which will lead to the application crashing.
Besides, user is also able to revoke the granted permission anytime through phone’s Settings application.