I'm trying to make a popup coming out from below, which can increase height to a certain point (guideline in percentage, 10%). The content may be larger than this size, so it needs to be scrollable.
So my layout is this:
<?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"
android:id="@+id/clContent"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.constraintlayout.widget.Guideline
android:id="@+id/gl_top"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent=".1"
/>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="@id/gl_top"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constrainedHeight="true"
app:layout_constraintVertical_bias="1"
>
<ScrollView
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
>
<View
android:layout_width="match_parent"
android:layout_height="200dp"
android:background="@android:color/black"
/>
</ScrollView>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
And what actually happens is this: ScrollView have zero height. So my question is how to make popup with wrap_content layout height to scroll after it achieve its top point?