Converting Match_parent To "0dp"

When I use android:layout_height='match_parent' or android:layout_width='match_parent' as height/width of children in Constraint Layout and build the Gradle file it automatically c

Solution 1:

match_parent isn't supported in ConstraintLayout. If you want the same behavior, use 0dp and set constraints on each side to the parent.

Solution 2:

You should not use match_parent for any view in a ConstraintLayout. Instead use "match constraints" (0dp)

match_parent means filling whats left where as 0dp means match constraints. In ConstraintLayout, match_parent is not supported.

match_parent relies on it's parent for it's position (x,y & width/height) but 0dp can be defined by a constraint/position

Solution 3:

The way worked with me for putting a Relative item, under another element, with width matching parent is:

<RelativeLayoutandroid:layout_width="0dp"android:layout_height="wrap_content"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toBottomOf="@id/xxx"app:layout_constraintEnd_toEndOf="@+id/xxx"
    >