How to center a View inside of an Android Layout?

Question

I want to put a layout in the center of the screen.

Answer 1

You can apply a centering to any View, including a Layout, by using the XML attribute android:layout_gravity". You probably want to give it the value "center".

You can find a reference of possible values for this option here: http://developer.android.com/reference/android/widget/LinearLayout.LayoutParams.html#attr_android:layout_gravity

Answer 2

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/relLayout1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center">
    <ProgressBar
        android:id="@+id/ProgressBar01"
        android:layout_centerInParent="true"
        android:layout_width="wrap_content"
        android:layout_gravity="center"
        android:layout_height="wrap_content"></ProgressBar>
    <TextView
        android:layout_below="@id/ProgressBar01"
        android:text="@string/please_wait_authenticating"
        android:id="@+id/txtText"
        android:paddingTop="30px"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"></TextView>
</RelativeLayout>

Answer 3

Use ConstraintLayout. Here is an example that will center the view according to the width and height of the parent screen:

<?xml version="1.0" encoding="utf-8"?>
<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">

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#FF00FF"
        android:orientation="vertical"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHeight_percent=".6"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintWidth_percent=".4"></LinearLayout>
</android.support.constraint.ConstraintLayout>

You might need to change your gradle to get the latest version of ConstraintLayout:

dependencies {
...
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
}

Answer 4

Add android:layout_centerInParent="true" to element which you want to center in the RelativeLayout

Answer 5

It will work for that code sometimes need both properties

android:layout_gravity="center"
android:layout_centerHorizontal="true"

Answer 6

Step #1: Wrap whatever it is you want centered on the screen in a full-screen RelativeLayout.

Step #2: Give that child view (the one, which you want centered inside the RelativeLayout) the android:layout_centerInParent="true" attribute.