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Start your free trialBrighton Machaya
7,692 Pointsandroid
In a ConstraintLayout, we can center a View by aligning its top, bottom, left, and right all to the edges of its parent. In the layout below, center the ImageView by setting each "layout_constraint" item to "parent" (just fill in the blanks).
<android.support.constraint.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">
<ImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scaleType=""
app:srcCompat="@drawable/grumpy_cat"
app:layout_constraintTop_toTopOf=""
app:layout_constraintBottom_toBottomOf=""
app:layout_constraintLeft_toLeftOf=""
app:layout_constraintRight_toRightOf="" />
<EditText
android:id="@+id/captionField"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:hint="Enter a caption"
android:layout_marginTop=""
app:layout_constraintTop_toBottomOf="@+id/layout_constraint"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parentlayout_constraint" />
</android.support.constraint.ConstraintLayout>
1 Answer
Elias Svoba
14,347 PointsJust type parent :
<android.support.constraint.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">
<ImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scaleType=""
app:srcCompat="@drawable/grumpy_cat"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent" />
<EditText
android:id="@+id/captionField"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:hint="Enter a caption"
android:layout_marginTop=""
app:layout_constraintTop_toBottomOf="@+id/imageView"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent" />
</android.support.constraint.ConstraintLayout>