I want to put the button at the center, but i don't know where is the mistake, can you help me?-CodePudding

Here what im done to make the the button at the center

CodePudding user response：

You should be using android:layout_gravity instead of android:gravity, as the latter is used to set the gravity of its subviews.

layout_gravity should however align the button on the center as this one is relative to its parent.

CodePudding user response：

you can use one of this layouts

RelativeLayout

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"/>
</RelativeLayout>

or LinearLayout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center">
    
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    
</LinearLayout>

but i recommend you learn android ui design from here