val storagePermission = APermission(READ_EXTERNAL_STORAGE, WRITE_EXTERNAL_STORAGE)

storagePermission.request(context) { result ->
    if (result.isAllGranted) {
        // todo
    } else {
        result.forEach { permission: Permission ->
            if (!permission.isGranted) {
                Log.w("Permission", "Permission ${permission.name} is denied")
            }
        }
    }
}


storagePermission.onGranted(context) {
    // todo
}.onDenied(context) {
    // todo
}


view.onClick(storagePermission, lifecycle) {
    assert(lifecycle.currentState == Lifecycle.State.RESUMED)
    // todo
}

class DemoFragment : Fragment() {

    init {
        retainInstance = true
    }

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        return inflater.inflate(R.layout.activity_main, container, false)
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        view.onClick(storagePermission, this) {
            Log.i("Permission", "Granted")
            assert(lifecycle.currentState == Lifecycle.State.RESUMED)
            assert(!isStateSaved)
            fragmentManager.beginTransaction()
                .replace(android.R.id.content, SomeFragment())
                .commit()
        }
    }

}

class DoNotDoThisActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        if (savedInstanceState == null) {
            storagePermission.onGranted(this) {
                // Don’t do this
                // Activity may already destroyed now
                supportFragmentManager.beginTransaction()
                    .replace(android.R.id.content, DemoFragment())
                    .commit()
            }
        }
    }
}