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ConstraintLayout 问题 #30

@asker517

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@asker517
<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="match_parent"
    >

<FrameLayout
      android:id="@+id/layoutTest"
      android:layout_width="match_parent"
      android:layout_height="0dp"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintEnd_toEndOf="parent"
      app:layout_constraintStart_toStartOf="parent"
      app:layout_constraintTop_toTopOf="parent"
      >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="show content"
        android:textColor="@color/cardview_dark_background"
        />


  </FrameLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

如上指定显示state区域contentView 为layoutTest,如果android:layout_height="0dp"调用showContentView(),实际内容并不能被正确显示出来,此时最终的layoutTest...height就为0了...
@DylanCaiCoding

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