У меня есть ScrollView внутри моего ограниченного макета, который содержит другой ограниченный макет, представление не отображает его содержимое, если я установил его высоту на «Match-Constrained», то есть (0dp). если я установил для него что-то жестко запрограммированное, например 400dp, то оно работает.
Я попытался воспроизвести то же самое в тестовом приложении, и это сработало нормально, но не работает в моем приложении.
вид прокрутки называется "questionview", включается в конец основного макета.
Вот основной макет:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
android:id="@+id/fragmentExamLayout"
android:padding="15dp"
tools:context=".ui.examination.ExamSectionFragment">
<com.google.android.material.tabs.TabLayout
android:id="@+id/questionTab"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/exitTestButton"
app:tabGravity="center"
app:tabIndicatorColor="@color/colorPrimary"
app:tabIndicatorGravity="top"
app:tabIndicatorHeight="2dp"
app:tabMinWidth= "@dimen/tab_min_width"
app:tabMode="scrollable"
app:tabRippleColor="@color/colorAccent"
app:tabSelectedTextColor="@color/colorPrimary" />
<TextView
android:id="@+id/timerText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="@string/timer"
android:textAlignment="center"
android:textColor="@color/colorPrimary"
android:textSize="@dimen/question_text_size"
app:autoSizeTextType="uniform"
app:layout_constraintEnd_toStartOf="@+id/exitTestButton"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintHorizontal_chainStyle="spread_inside"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/exitTestButton"
style="@android:style/Widget.DeviceDefault.Light.Button.Borderless.Small"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:text="@string/submit_test"
android:textColor="#CF0A0A"
app:layout_constraintBottom_toBottomOf="@+id/timerText"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/timerText"
app:layout_constraintTop_toTopOf="@+id/timerText" />
<TextView
android:id="@+id/questionNumber"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:text="@string/QuestionNum"
android:textSize="@dimen/heading_text_size"
android:textStyle="bold"
app:layout_constrainedHeight="false"
app:layout_constraintEnd_toStartOf="@+id/questionMMarks"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintHorizontal_chainStyle="spread_inside"
app:layout_constraintStart_toEndOf="@+id/include3"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/questionTab" />
<TextView
android:id="@+id/questionMMarks"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:text="@string/m_m"
android:textSize="@dimen/heading_text_size"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="@+id/questionNumber"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/questionNumber" />
<include
android:id="@+id/include3"
layout="@layout/questionview"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/questionNumber" />
</androidx.constraintlayout.widget.ConstraintLayout>
ScrollView добавляется с помощью тега «include»
вот код для прокрутки:
<?xml version="1.0" encoding="utf-8"?>
<androidx.core.widget.NestedScrollView
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"
android:fillViewport="true"
android:id="@+id/scrollView3"
>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:divider="@android:drawable/divider_horizontal_dim_dark"
android:padding="16dp"
android:showDividers="beginning">
<TextView
android:id="@+id/questionText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:textSize="@dimen/question_text_size"
app:autoSizeTextType="uniform"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.514"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<RadioGroup
android:id="@+id/radioGroup"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="32dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/questionText">
<RadioButton
android:id="@+id/radioButton1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="@dimen/text_margin"
android:text=""
android:textSize="@dimen/radio_text_size"/>
<RadioButton
android:id="@+id/radioButton2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="@dimen/text_margin"
android:text=""
android:textSize="@dimen/radio_text_size"/>
<RadioButton
android:id="@+id/radioButton3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="@dimen/text_margin"
android:text=""
android:textSize="@dimen/radio_text_size"/>
<RadioButton
android:id="@+id/radioButton4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="@dimen/text_margin"
android:text=""
android:textSize="@dimen/radio_text_size"/>
</RadioGroup>
<Button
android:id="@+id/saveAndNextButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
android:background="@drawable/buttonshape"
android:paddingHorizontal="@dimen/button_padding_horizontal"
android:text="@string/save_and_next"
android:textColor="#FFFFFF"
android:textSize="@dimen/buttton_text_size"
app:layout_constraintBottom_toBottomOf="@+id/markReviewButton"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/markReviewButton"
app:layout_constraintTop_toTopOf="@+id/markReviewButton"
app:layout_constraintVertical_bias="0.396" />
<Button
android:id="@+id/markReviewButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="36dp"
android:layout_marginEnd="32dp"
android:layout_marginBottom="24dp"
android:background="@drawable/buttonshape"
android:paddingHorizontal="@dimen/button_padding_horizontal"
android:text="@string/mark_for_review"
android:textColor="#FFFFFF"
android:textSize="@dimen/buttton_text_size"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/saveAndNextButton"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintHorizontal_chainStyle="spread_inside"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/radioGroup"
app:layout_constraintVertical_bias="0.0" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>
Это должно выглядеть так:
Изображение макета
, если я изменю высоту макета в include на фиксированную height как 400dp, как показано:
<include
android:id="@+id/include3"
layout="@layout/questionview"
android:layout_width="0dp"
android: layout_height = "400dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/questionNumber" />
ScrollView работает нормально тогда.