Judul : How to Constraint Layout Vertical Align Center
link : How to Constraint Layout Vertical Align Center
How to Constraint Layout Vertical Align Center
ConstraintLayout is a layout on Android that gives you adaptable and flexible ways to create views for your apps. ConstraintLayout , which is now the default layout in Android Studio, gives you many ways to place objects. You can constrain them to their container, to each other or to guidelines
It's possible to set the center aligned view as an anchor for other views. In the example below "@+id/stat_2" centered horizontally in parent and it serves as an anchor for other views in this layout.
<android.support.constraint.ConstraintLayout 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">
<TextView
android:id="@+id/stat_1"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:gravity="center"
android:maxLines="1"
android:text="10"
android:textColor="#777"
android:textSize="22sp"
app:layout_constraintTop_toTopOf="@+id/stat_2"
app:layout_constraintEnd_toStartOf="@+id/divider_1" />
<TextView
android:id="@+id/stat_detail_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Streak"
android:textColor="#777"
android:textSize="12sp"
app:layout_constraintTop_toBottomOf="@+id/stat_1"
app:layout_constraintStart_toStartOf="@+id/stat_1"
app:layout_constraintEnd_toEndOf="@+id/stat_1" />
<View
android:id="@+id/divider_1"
android:layout_width="1dp"
android:layout_height="0dp"
android:layout_marginEnd="16dp"
android:background="#ccc"
app:layout_constraintTop_toTopOf="@+id/stat_2"
app:layout_constraintEnd_toStartOf="@+id/stat_2"
app:layout_constraintBottom_toBottomOf="@+id/stat_detail_2" />
<TextView
android:id="@+id/stat_2"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:gravity="center"
android:maxLines="1"
android:text="243"
android:textColor="#777"
android:textSize="22sp"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="parent" />
<TextView
android:id="@+id/stat_detail_2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:maxLines="1"
android:text="Calories Burned"
android:textColor="#777"
android:textSize="12sp"
app:layout_constraintTop_toBottomOf="@+id/stat_2"
app:layout_constraintStart_toStartOf="@+id/stat_2"
app:layout_constraintEnd_toEndOf="@+id/stat_2" />
<View
android:id="@+id/divider_2"
android:layout_width="1dp"
android:layout_height="0dp"
android:layout_marginStart="16dp"
android:background="#ccc"
app:layout_constraintBottom_toBottomOf="@+id/stat_detail_2"
app:layout_constraintStart_toEndOf="@+id/stat_2"
app:layout_constraintTop_toTopOf="@+id/stat_2" />
<TextView
android:id="@+id/stat_3"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:gravity="center"
android:maxLines="1"
android:text="3200"
android:textColor="#777"
android:textSize="22sp"
app:layout_constraintTop_toTopOf="@+id/stat_2"
app:layout_constraintStart_toEndOf="@+id/divider_2" />
<TextView
android:id="@+id/stat_detail_3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:maxLines="1"
android:text="Steps"
android:textColor="#777"
android:textSize="12sp"
app:layout_constraintTop_toBottomOf="@+id/stat_3"
app:layout_constraintStart_toStartOf="@+id/stat_3"
app:layout_constraintEnd_toEndOf="@+id/stat_3" />
</android.support.constraint.ConstraintLayout>
If you have a ConstraintLayout with some size, and a child View with some smaller size, you can achieve centering by constraining the child's two edges to the same two edges of the parent. That is, you can write:
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
or
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
Update
Below is XML that achieves your desired UI with no nesting of views and no Guidelines (though guidelines are not inherently evil).
<android.support.constraint.ConstraintLayout
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="wrap_content"
android:background="#eee">
<TextView
android:id="@+id/title1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="12dp"
android:gravity="center"
android:textColor="#777"
android:textSize="22sp"
android:text="10"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/divider1"
app:layout_constraintBottom_toBottomOf="parent"/>
<TextView
android:id="@+id/label1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="center"
android:textColor="#777"
android:textSize="12sp"
android:text="Streak"
app:layout_constraintTop_toBottomOf="@+id/title1"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/divider1"/>
<View
android:id="@+id/divider1"
android:layout_width="1dp"
android:layout_height="55dp"
android:layout_marginTop="12dp"
android:layout_marginBottom="12dp"
android:background="#ccc"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintLeft_toRightOf="@+id/title1"
app:layout_constraintRight_toLeftOf="@+id/title2"
app:layout_constraintBottom_toBottomOf="parent"/>
<TextView
android:id="@+id/title2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="12dp"
android:gravity="center"
android:textColor="#777"
android:textSize="22sp"
android:text="243"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintLeft_toRightOf="@+id/divider1"
app:layout_constraintRight_toLeftOf="@+id/divider2"
app:layout_constraintBottom_toBottomOf="parent"/>
<TextView
android:id="@+id/label2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="center"
android:textColor="#777"
android:textSize="12sp"
android:text="Calories Burned"
app:layout_constraintTop_toBottomOf="@+id/title2"
app:layout_constraintLeft_toRightOf="@+id/divider1"
app:layout_constraintRight_toLeftOf="@+id/divider2"/>
<View
android:id="@+id/divider2"
android:layout_width="1dp"
android:layout_height="55dp"
android:layout_marginTop="12dp"
android:layout_marginBottom="12dp"
android:background="#ccc"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintLeft_toRightOf="@+id/title2"
app:layout_constraintRight_toLeftOf="@+id/title3"
app:layout_constraintBottom_toBottomOf="parent"/>
<TextView
android:id="@+id/title3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="12dp"
android:gravity="center"
android:textColor="#777"
android:textSize="22sp"
android:text="3200"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintLeft_toRightOf="@+id/divider2"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="parent"/>
<TextView
android:id="@+id/label3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="center"
android:textColor="#777"
android:textSize="12sp"
android:text="Steps"
app:layout_constraintTop_toBottomOf="@+id/title3"
app:layout_constraintLeft_toRightOf="@+id/divider2"
app:layout_constraintRight_toRightOf="parent"/>
</android.support.constraint.ConstraintLayout>
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