scene

The pitfalls that novices encounter when Android studio runs its first App:

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/103797243

Use relative layout RelativeLayout to implement a simple layout of login prompts. The effect is as follows

Note:

Blog:
https://blog.csdn.net/badao_liumang_qizhi
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Realization

The default page layout after new creation is

Change it to RelativeLayout

Relative layout as long as there is a reference, that is, who is under who, who is left, and who is left aligned, and so on.

First create a new TextView, set its ID, and put it in the middle of the screen

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New version found. Do you want to update now?"
        android:id="@+id/textView1"
        android:layout_centerInParent="true"/>

It is mainly set in the middle through Android: layout ﹣ centerinparent = "true" / > setting.

Then set the update now button to the bottom of TextView through Android: layout  below = "@ + ID / TextView1" setting, and right align with TextView through Android: layout  align right = "@ + ID / TextView1" / > setting.

Then add a button below the textView and to the left of the update now button.

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Update now"
        android:id="@+id/button2"
        android:layout_below="@+id/textView1"
        android:layout_toLeftOf="@+id/button1"/>

Full sample code

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

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New version found. Do you want to update now?"
        android:id="@+id/textView1"
        android:layout_centerInParent="true"/>


    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Talk later"
        android:id="@+id/button1"
        android:layout_below="@+id/textView1"
        android:layout_alignRight="@+id/textView1"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Update now"
        android:id="@+id/button2"
        android:layout_below="@+id/textView1"
        android:layout_toLeftOf="@+id/button1"/>

</RelativeLayout>