Question

androidx.core.widget.NestedScrollView
LinearLayout
androidx.constraintlayout.widget.ConstraintLayout
TextView
CheckBox
CheckBox
CheckBox
CheckBox
CheckBox
CheckBox
CheckBox
CheckBox
CheckBox
CheckBox
TextView
include
include
include

上面是我的XML的结构，当我包括布局时，scrollview不起作用。

最初，所包含的布局为“可见性已消失”，选中此复选框后，它们将变为可见。复选框不足以使屏幕可滚动，但是一旦使包含的布局可见，scrollView应该就会滚动。但是布局从底部切入并且没有滚动。

完整的XML：

<?xml version="1.0" encoding="utf-8"?>

<data>

    <variable
        name="annualRiskAssessmentVM"
        type="com.cmm_android.forms.risk_assessment.AnnualRiskAssessmentVM" />

    <variable
        name="fragment"
        type="com.cmm_android.forms.risk_assessment.AnnualRiskAssessmentFrag4" />

</data>


<androidx.core.widget.NestedScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="fill_parent"
            android:padding="@dimen/_16sdp">


            <TextView
                android:id="@+id/tv2"
                style="@style/RegularBlack"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/_8sdp"
                android:text="My support will include assistance with :"
                android:textAlignment="viewStart"
                app:layout_constraintTop_toBottomOf="@+id/tv1" />

            <CheckBox
                android:id="@+id/cbMedication"
                style="@style/CheckBox"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/_8sdp"
                android:text="Medication"
                app:layout_constraintTop_toBottomOf="@id/tv2" />

            <CheckBox
                android:id="@+id/cbPersonalCare"
                style="@style/CheckBox"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/_4sdp"
                android:text="Personal Care"
                app:layout_constraintTop_toBottomOf="@id/cbMedication" />

            <CheckBox
                android:id="@+id/cbNutrition"
                style="@style/CheckBox"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/_4sdp"
                android:text="Nutrition"
                app:layout_constraintTop_toBottomOf="@id/cbPersonalCare" />

            <CheckBox
                android:id="@+id/cbMoneyManagement"
                style="@style/CheckBox"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/_4sdp"
                android:text="Money Management"
                app:layout_constraintTop_toBottomOf="@id/cbNutrition" />

            <CheckBox
                android:id="@+id/cbShopping"
                style="@style/CheckBox"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/_4sdp"
                android:text="Shopping"
                app:layout_constraintTop_toBottomOf="@id/cbMoneyManagement" />

            <CheckBox
                android:id="@+id/cbSocialActivity"
                style="@style/CheckBox"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/_4sdp"
                android:text="Social activities or accessing the community"
                app:layout_constraintTop_toBottomOf="@id/cbShopping" />

            <CheckBox
                android:id="@+id/cbCompanionship"
                style="@style/CheckBox"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/_4sdp"
                android:text="Companionship (sitter service)"
                app:layout_constraintTop_toBottomOf="@id/cbSocialActivity" />

            <CheckBox
                android:id="@+id/cbWellbeing"
                style="@style/CheckBox"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/_4sdp"
                android:text="Wellbeing checks"
                app:layout_constraintTop_toBottomOf="@id/cbCompanionship" />

            <CheckBox
                android:id="@+id/cbDomestic"
                style="@style/CheckBox"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/_4sdp"
                android:text="Domestic"
                app:layout_constraintTop_toBottomOf="@id/cbWellbeing" />

            <CheckBox
                android:id="@+id/cbOther"
                style="@style/CheckBox"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/_4sdp"
                android:text="Other"
                app:layout_constraintTop_toBottomOf="@id/cbDomestic" />


            <TextView
                android:id="@+id/tv3"
                style="@style/SmallBlack"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/_8sdp"
                android:text="Now complete additional relevant sections below"
                app:layout_constraintTop_toBottomOf="@id/cbOther" />


            <include
                android:id="@+id/layout_medication"
                layout="@layout/layout_medication"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:visibility="gone"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/tv3" />

            <include
                android:id="@+id/layout_personal_care"
                layout="@layout/layout_personal_care"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:visibility="gone"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/layout_medication" />

            <include
                android:id="@+id/layout_nutrition"
                layout="@layout/layout_nutrition"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:visibility="gone"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/layout_personal_care" />


        </androidx.constraintlayout.widget.ConstraintLayout>
    </LinearLayout>
</androidx.core.widget.NestedScrollView>

我在SO上发表了许多文章，但是没有人涉及所包含布局的可见性。

Answer 1

所以，这是我一整天都想出的最愚蠢的错误。

我的约束布局的第一个孩子被约束在tv1的底部，而tv1的底部甚至不在整个布局中。（复制粘贴错误）

    <TextView
            android:id="@+id/tv2"
            style="@style/RegularBlack"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/_8sdp"
            android:text="My support will include assistance with :"
            android:textAlignment="viewStart"
            app:layout_constraintTop_toBottomOf="@+id/tv1" />

将其更改为

 app:layout_constraintTop_toTopOf="parent"

，滚动开始工作。：）

当ScrollView的子级包含某些布局时，NestedScrollView / ScrollView不滚动

1 个答案: