How can I bottom & center-horizontally align a TextView on a LinearLayout?-CodePudding

Based on this layout:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@ id/lytContainer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerHorizontal="true"
android:gravity="center_vertical|center_horizontal"
android:orientation="vertical">

<Button
    android:id="@ id/scanButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/scan" />

<TextView
    android:id="@ id/authorship"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|center_horizontal"
    android:text="" />
</LinearLayout>

I'd like to keep the Scan Button centered horizontally keeping the screen ratio, so it's always kept in the middle of the screen.

Next, I'd like to have the TextView centered on the bottom of the screen and centered too, like this:

Seems like the property and value of android:gravity="center_vertical|center_horizontal" I have on the LinearLayout is stopping me from having it so, but I have no idea how to proceed.

CodePudding user response：

Here the code snippet here I hope this work for you as per your need...

<LinearLayout 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"
    tools:context=".MainActivity"
    android:weightSum="1"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_gravity="center_vertical"
        android:gravity="center"
        android:layout_weight="1"
        android:orientation="vertical"
        android:layout_height="wrap_content">
        <com.google.android.material.button.MaterialButton
            android:layout_width="wrap_content"
            app:cornerRadius="10dp"
            android:paddingHorizontal="10dp"
            android:textSize="16sp"
            android:text="Scan Product"
            android:layout_height="wrap_content" />




    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:layout_weight="1">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="Hello World!"
            android:gravity="center"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />
    </LinearLayout>


</LinearLayout>