Horizo​​ntalScrollView隐藏其子视图

Question

每当我在xml文件中附加带有水平滚动视图标签的自定义viewws时，视图似乎消失了。 在之前的相关问题中，它被称为

  

“如果设置，水平滚动视图会隐藏其子项   android：layout_gravity =“center_horizo​​ntal”用于内部容器。“

<HorizontalScrollView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/scroll"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:fillViewport="true" >
<RelativeLayout
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:orientation="horizontal"
    tools:layout_constraintTop_creator="1"
    tools:layout_constraintRight_creator="1"
    tools:layout_constraintBottom_creator="1"
    android:layout_marginStart="8dp"
    app:layout_constraintBottom_toBottomOf="parent"
    android:layout_marginEnd="8dp"
    app:layout_constraintRight_toRightOf="parent"
    android:layout_marginTop="8dp"
    tools:layout_constraintLeft_creator="1"
    android:layout_marginBottom="8dp"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    android:layout_marginLeft="8dp"
    android:layout_marginRight="8dp">

    <com.example.mahikanthnag.cs.views.StateProgressBar
        android:id="@+id/your_state_progress_bar_id"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        app:spb_currentStateNumber="three"
        app:spb_maxStateNumber="four"
        app:spb_stateBackgroundColor="#BDBDBD"
        app:spb_stateForegroundColor="#009688"
        app:spb_stateNumberBackgroundColor="#808080"
        app:spb_stateNumberForegroundColor="#eeeeee"
        app:spb_currentStateDescriptionColor="#009688"
        app:spb_stateDescriptionColor="#808080"
        app:spb_animateToCurrentProgressState="true"
        app:spb_checkStateCompleted="true"
        />

    <com.example.mahikanthnag.cs.views.StateProgressBar
        android:id="@+id/your_state_progress_bar_id1"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        app:spb_currentStateNumber="three"
        app:spb_maxStateNumber="four"
        app:spb_stateBackgroundColor="#BDBDBD"
        app:spb_stateForegroundColor="#009688"
        app:spb_stateNumberBackgroundColor="#808080"
        app:spb_stateNumberForegroundColor="#eeeeee"
        app:spb_currentStateDescriptionColor="#009688"
        app:spb_stateDescriptionColor="#808080"
        app:spb_animateToCurrentProgressState="true"
        app:spb_checkStateCompleted="true"
        android:layout_toRightOf="@+id/your_state_progress_bar_id"
        />

    <com.example.mahikanthnag.cs.views.StateProgressBar
        android:id="@+id/your_state_progress_bar_id2"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        app:spb_currentStateNumber="three"
        app:spb_maxStateNumber="four"
        app:spb_stateBackgroundColor="#BDBDBD"
        app:spb_stateForegroundColor="#009688"
        app:spb_stateNumberBackgroundColor="#808080"
        app:spb_stateNumberForegroundColor="#eeeeee"
        app:spb_currentStateDescriptionColor="#009688"
        app:spb_stateDescriptionColor="#808080"
        app:spb_animateToCurrentProgressState="true"
        app:spb_checkStateCompleted="true"
        android:layout_toRightOf="@+id/your_state_progress_bar_id1"
        />
</RelativeLayout>
</HorizontalScrollView>

但在我的情况下，我根本没有android：layout_gravity属性。我该如何解决这个问题？

这是我的布局xml文件，其中我添加了cutom视图

欢迎任何建议 感谢

Answer 1

使用线性布局代替相对布局，如下所示：

                        <LinearLayout
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:gravity="center"
                            android:orientation="horizontal">

                            <HorizontalScrollView
                                android:layout_width="wrap_content"
                                android:layout_height="match_parent"
                                android:scrollbars="none">

                                <LinearLayout
                                    android:id="@+id/travelGallery"
                                    android:layout_width="100dp"
                                    android:layout_height="100dp"
                                    android:gravity="center"
                                    android:orientation="horizontal" >
                                     <Your view 1/>
                                     <Your view 2/>
                                     <Your view n/>
                                </LinearLayout>
                            </HorizontalScrollView>
                        </LinearLayout>