android - 更改广播接收器中的文本

Question

我在 Kotlin 中使用广播接收器，并试图更改接收器内少数文本视图和图像视图的文本。但是，更改在应用程序中不可见。我已经对其进行了调试，并且在尝试设置变量时可以看到数据存在于变量中。

UserData 类包含字段名称、电子邮件、头像名称和头像颜色中的数据。但是，没有任何文本字段或图像视图显示分配的数据。

LocalBroadcastManager.getInstance(this).registerReceiver(userDataChangeReceiver, IntentFilter(BROADCAST_USER_DATA_CHANGE))

private val userDataChangeReceiver = object : BroadcastReceiver() {

        override fun onReceive(context: Context?, intent: Intent?) {
            if (AuthService.isLoggedIn) {
                usernameNavHeader.text = UserData.name
                userEmailNavHeader.text = UserData.email
                val resourceId = resources.getIdentifier(UserData.avatarName, "drawable", packageName)
                userImgNavHeader.setImageResource(resourceId)
                userImgNavHeader.setBackgroundColor(UserData.getAvatarColor(UserData.avatarColor))
                loginBtnNavHeader.text = getString(R.string.logout)
            }
        }
    }

val userDataChange = Intent(BROADCAST_USER_DATA_CHANGE)
                          LocalBroadcastManager.getInstance(this).sendBroadcast(userDataChange)

这是布局

<ImageView
        android:id="@+id/userImgNavHeader"
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:layout_marginStart="12dp"
        android:layout_marginBottom="8dp"
        android:contentDescription="@string/nav_header_desc"
        android:paddingTop="@dimen/nav_header_vertical_spacing"
        app:layout_constraintBottom_toTopOf="@+id/loginBtnNavHeader"
        app:layout_constraintStart_toStartOf="parent"
        app:srcCompat="@drawable/profiledefault" />

    <TextView
        android:id="@+id/usernameNavHeader"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:paddingTop="@dimen/nav_header_vertical_spacing"
        app:layout_constraintStart_toEndOf="@+id/userImgNavHeader"
        app:layout_constraintTop_toTopOf="@+id/userImgNavHeader"
        tools:text="ABD" />

    <TextView
        android:id="@+id/userEmailNavHeader"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        app:layout_constraintStart_toEndOf="@+id/userImgNavHeader"
        app:layout_constraintTop_toBottomOf="@+id/usernameNavHeader"
        tools:text="[e-mail]" />

    <Button
        android:id="@+id/loginBtnNavHeader"
        android:layout_width="wrap_content"
        android:layout_height="32dp"
        android:layout_marginStart="4dp"
        android:layout_marginBottom="8dp"
        android:background="@android:color/transparent"
        android:onClick="loginBtnNavClicked"
        android:text="@string/login"
        android:textAlignment="center"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

标签： androidkotlin