我需要从 Kotlin 上的片段更新我的 DrawerLayout

Question

我的 MainActivity 上有一个功能可以从 Firestore 加载用户数据以更新抽屉上的图像，但它仅在我重新启动应用程序时更新，当我更新配置文件片段上的用户详细信息时，详细信息是在 Firebase 上更新，但不在我的抽屉上。我怎样才能改变这个？我正在使用的教程在不同的活动中做所有事情。

以下是我在主要活动上的功能和 FirestoreClass 上的方法

class MainActivity : AppCompatActivity() {
 
override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val toolbar: Toolbar = findViewById(R.id.toolbar)
        setSupportActionBar(toolbar)

        FirestoreClass().loadUserData(this)

   fun updateNavigationUserDetails(user: User){

        val ivDrawerImage : ImageView = findViewById(R.id.iv_drawer)

        Glide
            .with(this)
            .load(user.image)
            .centerCrop()
            .placeholder(R.drawable.ic_user_place_holder)
            .into(ivDrawerImage)

        val userName : TextView = findViewById(R.id.tv_drawer)
        userName.text = user.name
        val userEmail : TextView = findViewById(R.id.tv_email_drawer)
        userEmail.text = user.email
    }
}

class FirestoreClass {


    fun loadUserDataOnProfile(fragment: Fragment) {
        firestore.collection(Constants.USERS)
            .document(getCurrentUserID())
            .get()
            .addOnSuccessListener { document ->
                val loggedUser = document.toObject(User::class.java)

                when(fragment) {
                    is ProfileFragment -> {
                        fragment.setUserDataInUI(loggedUser!!)
                     }
                }
            }
            .addOnFailureListener { e ->
                Log.e("TAG", "Error ssssss", e)

            }
    }

    fun loadUserData(activity: Activity) {
        firestore.collection(Constants.USERS)
            .document(getCurrentUserID())
            .get()
            .addOnSuccessListener { document ->
                val loggedUser = document.toObject(User::class.java)

                when (activity) {
                    is SignInActivity -> {
                        activity.signInSuccess(loggedUser!!)
                    }
                    is MainActivity -> {
                        activity.updateNavigationUserDetails(loggedUser!!)
                    }
                }
            }
            .addOnFailureListener { e ->
                Log.e("TAG", "Error signing in", e)

            }
    }

class ProfileFragment : Fragment() {

val btnUpdate: Button = view.findViewById(R.id.btn_update)
        btnUpdate.setOnClickListener {
            if(selectedImageUri != null){
                uploadUserImage()
            } else {
                updateUserProfileData()
            }
            findNavController().navigate(R.id.action_nav_my_profile_to_nav_home)
        }

当我按下 profileFragment 上的 updateButton 时，我想调用 MainActivity 上的 updateNavigationUserDetails()。我该怎么做？

Answer 1

首先你应该创建一个NavigationUpdaterListener 接口：

interface NavigationUpdaterListener {
    fun onUserDataChanged()
}

那么你应该让你的MainActivity 实现这个接口：

class MainActivity : AppCompatActivity(), NavigationUpdaterListener {
 
   fun updateNavigationUserDetails(user: User){

        val ivDrawerImage : ImageView = findViewById(R.id.iv_drawer)

        Glide
            .with(this)
            .load(user.image)
            .centerCrop()
            .placeholder(R.drawable.ic_user_place_holder)
            .into(ivDrawerImage)

        val userName : TextView = findViewById(R.id.tv_drawer)
        userName.text = user.name
        val userEmail : TextView = findViewById(R.id.tv_email_drawer)
        userEmail.text = user.email
    }

    override fun onUserDataChanged() {
        updateNavigationUserDetails()
    }
}

然后你可以像这样从ProfileFragment 调用监听器：

(requireActivity() as NavigationUpdaterListener).onUserDataChanged()

Answer 2

更新：

更新用户数据的部分，例如：

mFirebaseFirestore
  .collection("users")
  .document(mFirebaseAuth.getUid())
  .update(userMap)
  .addOnSuccessListener { document->
     Log.d(TAG, "DocumentSnapshot successfully updated!")
     val user = document.toObject(User::class.java)
     //Can be called here
     updateNavigationUserDetails(user)
      }
  .addOnFailureListener {
     Log.d(TAG, "DocumentSnapshot failed to update!") }