Clash Royale CLAN TAG#URR8PPP

Android make one element take rest of space

I have an activity that has one element that is rooted to the top, and another element that should take the rest of the space available. The first element's content will change over time and require different amounts of space, and the second element needs to change size with it. This is a simplified version of what I have already:

<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
>

<TextView
android:id="@+id/textview_A"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent"
/>

<TextView
android:id="@+id/textview_B"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="@+id/textview_A"
app:layout_constraintBottom_toBottomOf="parent"
/>

</android.support.constraint.ConstraintLayout>


The way it is currently, the top element is correct, but the second element isn't. It will adjust its position to be halfway the bottom of the top element and the bottom of the parent element, but its height is the same as its content, not all available space. How can I achieve this?

2 Answers
2

Set layout weight = 1
android: layout="1"

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Some of the previous answers on this

Change android:layout_height of @id/testview_B to 0dp. Something like
<TextView
android:id="@+id/textview_B"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintTop_toBottomOf="@id/textview_A"
app:layout_constraintBottom_toBottomOf="parent"
/>

android:layout_height

@id/testview_B

0dp

<TextView
android:id="@+id/textview_B"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintTop_toBottomOf="@id/textview_A"
app:layout_constraintBottom_toBottomOf="parent"
/>

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