隐私合规 权限解耦

        前段时间各大平台app市场纷纷加大app审核力度，android生态环境日趋健康，在日常的客户端开发当中，我们就需要时刻持有隐私安全的意识，让自己站在用户的角度上合理的保证隐私安全。

本文只探讨 动态权限授予实现解耦

调用流程

private fun userRequestPermissions() {
        val permissionCameraLinkedViewModel =
                PermissionCameraLinkedViewModel()
        val permissionRecordLinkedViewModel =
                PermissionRecordLinkedViewModel()
        val loginViewModel = LoginViewModel()

        loginViewModel.loginSuccess.observe(this, Observer {
            if (it) {
                Toast.makeText(baseContext, "登录成功", Toast.LENGTH_SHORT).show()
            }

        })
        viewModel.requestPermissions(permissionCameraLinkedViewModel, permissionRecordLinkedViewModel, loginViewModel, activity = this)

    }

业务链式分发 通过activity 注入 fragment PermissionProxy 转发权限请求并处理结果 ，通过livedata 更新视图

 fun requestPermissions(vararg permissions: BaseLinkedViewModel, activity: FragmentActivity) {
        //link

        for ((index, value) in permissions.withIndex()) {
            if (index != permissions.size - 1) {
                value.next = permissions[index + 1]
            }
        }
        permissions[0].next()
    }

调用权限请求 

 fun requestPermission(permission: String) {
        val granted = isGranted(permission)
        if (granted) {
            val permissionCallback: PermissionCallback? =
                    permissionCallbacks.get(permission);
            permissionCallbacks.remove(permission)
            permissionCallback?.onNext(permission, true, false)
        } else {
            //是否已拒绝过 已拒绝禁止再次弹出请求权限
            val refused = shouldShowRequestPermissionRationale(permission)
            val permissionCallback: PermissionCallback? =
                    permissionCallbacks.get(permission);
//            permissionCallbacks.remove(permission)
            permissionCallback?.onNext(permission, false, refused)
            showGlobalDialog(refused, permission)
        }

    }

abstract class BaseLinkedViewModel : BaseViewModel() {
   lateinit var next:BaseLinkedViewModel;
   abstract  fun next()
}

//model分离

class PermissionCameraLinkedViewModel : BaseRequestPermissionLinkedViewModel() {

    override fun bindPermissions(): String = Manifest.permission.CAMERA


}

class PermissionRecordLinkedViewModel : BaseRequestPermissionLinkedViewModel() {
    override fun bindPermissions(): String = Manifest.permission.RECORD_AUDIO


}

open class LoginViewModel : BaseLinkedViewModel() {
     val loginSuccess = MutableLiveData()
    override fun next() {
        loginSuccess.value = true
    }
}

代码实现 https://github.com/QtyearLin/permission