未在 Fragment 中触发按钮 onclicklistener

Button onclicklistener not fired in Fragment

我正在使用 Kotlin 1.3.61,kotlin 扩展,androidx.appcompat:appcompat:1.1.0androidx.constraintlayout:constraintlayout:1.1.3androidx.core:core-ktx:1.1.0org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.61

并访问片段中我的 xml 中定义的按钮,如下所示:

class MyFragment : Fragment(), OnMapReadyCallback {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        Log.i(TAG, "In onCreate()")
    }

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        Log.i(TAG, "In onCreateView()")
        return inflater.inflate(R.layout.fragment_map_bottom_view, container, false)
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        ...
        whereBtn.setOnClickListener {
            Log.i(TAG, "where clicked but first click doesn't register") 
        }

但是按钮的第一次点击永远不会触发,但第二次和后续点击会触发。

我尝试 @ContainerOptions(CacheImplementation.SPARSE_ARRAY) 获取片段,但没有成功。

这是片段布局文件:

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dp"
    android:backgroundTint="@color/white">

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/headerTitle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginTop="12dp"
        android:layout_marginEnd="16dp"
        android:text="@string/navHeaderTitle"
        android:textAppearance="@style/ChipTextCaptionFont"
        android:textColor="@color/black"
        app:layout_constraintBottom_toTopOf="@+id/whereBtn"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.095"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/whereBtn"
        style="@style/DrawerMenuItemsFont"
        android:layout_width="match_parent"
        android:layout_height="56dp"
        android:layout_below="@+id/headerTitle"
        android:layout_marginStart="16dp"
        android:layout_marginTop="16dp"
        android:layout_marginEnd="16dp"
        android:layout_marginBottom="32dp"
        android:paddingStart="12dp"
        android:paddingEnd="12dp"
        android:drawablePadding="10dp"
        android:drawableStart="@drawable/ic_search_24px"
        android:focusableInTouchMode="true"
        android:gravity="center_vertical"
        android:hint="@string/where_desc"
        android:clickable="true"
        android:focusable="true"
        android:textAppearance="@style/DrawerProfileCaptionFont"
        android:textSize="16sp"
        android:textColorHint="@color/black"
        android:background="@drawable/rect"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.285"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/headerTitle" />

</androidx.constraintlayout.widget.ConstraintLayout>

看来whereBtn是可聚焦的。

没有第一次点击的事件,因为焦点改变已经消耗了事件。