Constraint Layout - Group visibility is not working inside dynamic module

Question

Has anyone experienced issues with ConstraintLayout group visibility? I'm using ConstraintLayout 1.1.3 and I'm setting the visibility of group in both XML layout and java code. But it does not change the visibility status. It is always visible.

This is the layout file

 <?xml version="1.0" encoding="utf-8"?>
 <android.support.constraint.ConstraintLayout  
  xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent">

<ImageView
    android:id="@+id/iv_message_icon_activity_dictionary"
    android:layout_width="@dimen/message_icon_width"
    android:layout_height="@dimen/message_icon_height"
    android:layout_marginBottom="@dimen/message_text_view_margin_top"
    android:contentDescription="@string/app_name"
    android:src="@drawable/icon_error"
    app:layout_constraintBottom_toTopOf="@+id/tv_message_activity_dictionary"
    app:layout_constraintEnd_toEndOf="@id/tv_message_activity_dictionary"
    app:layout_constraintStart_toStartOf="@id/tv_message_activity_dictionary" />

<TextView
    android:id="@+id/tv_message_activity_dictionary"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginEnd="20dp"
    android:layout_marginLeft="20dp"
    android:layout_marginRight="20dp"
    android:layout_marginStart="20dp"
    android:gravity="center"
    android:textColor="@color/black"
    android:textSize="@dimen/medium_text_size"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    tools:text="@string/msg_no_internet" />

<Button
    android:id="@+id/btn_try_again_activity_dictionary"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="@dimen/try_again_button_margin_top"
    android:background="@drawable/rounded_button"
    android:minHeight="30dp"
    android:minWidth="@dimen/try_again_button_width"
    android:padding="10dp"
    android:text="@string/btn_try_again"
    android:textAllCaps="false"
    android:textColor="@color/white"
    android:textSize="@dimen/text_size_5"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@id/tv_message_activity_dictionary" />

<android.support.constraint.Group
    android:id="@+id/group_component_activity_dictionary"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:visibility="gone"
    app:constraint_referenced_ids="btn_try_again_activity_dictionary,tv_message_activity_dictionary,iv_message_icon_activity_dictionary" />

</android.support.constraint.ConstraintLayout>

What could be the reason for this?

UPDATE:

I forgot to mention that I'm using this layout inside of a dynamic module. Also I tested this using in the base module and it is working as expected, but not in a dynamic module. So finally I figured out the reason for the issue. Also when I debugged the code and evaluated this expression (group.getVisibility == View.GONE), it gave me TRUE.(even though the views inside the group are still visible)

Any suggestion is appreciated.

Answer 1

找到了解决此问题的方法，我希望这可以为其他人节省时间。这很奇怪，但这个问题的原因是在动态模块中使用了ConstraintLayout - Group。

所以修复是在java代码中，一旦你得到了对组的引用，然后使用如下的int数组设置引用ID，

Group group = findViewById(R.id.group);
group.setReferencedIds(new int[]{R.id.btn_try_again_activity_dictionary, R.id.tv_message_activity_dictionary, R.id.iv_message_icon_activity_dictionary});

在此之后，它按预期工作。因此无需设置组中单个视图的可见性。

Answer 2

不要忘记，您只能使用androidx.constraintlayout.widget.Group父视图，constraintlayout如果父视图是LinearLayout，那么它将不起作用，那么您可以尝试这个答案 ，它表示您在内部添加所需的视图FrameLayout，或者LinearLayout然后设置子父视图的可见性。

Answer 3

我在使用ConstraintLayout v1.1.3. 我在 XML 中设置组的可见性，但它不起作用。

由于ConstraintLayout v2.0.0已经处于测试阶段，我从 迁移v1.1.3到v2.0.0-beta2（检查最新版本）并且该问题不再发生。我现在可以毫无问题地从 XML 或代码更改组的可见性。