I believe Linear Layout will give some warnings when writing layout xml in studio

Set android:baselineAligned="false" on this element for better performance less

Lint checks also occur when using lint checks

Missing baselineAligned attribute

Let's start with the literal meaning of baseline Aligned baseline alignment
What does that have to do with our usual development?
When this warning occurs, most (others have not yet been found) also use the weight attribute. Linear Layout defaults to true. With a small example, you will quickly understand the direct code.

Let me set it to false first, and you ignore the Chinese language.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="match_parent"
    android:baselineAligned="false"
    android:layout_height="match_parent">
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="start"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="start"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Has the tortoise-rabbit race started yet?"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="start"
        />
</LinearLayout>

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After setting to true

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="match_parent"
    android:baselineAligned="true"
    android:layout_height="match_parent">
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="start"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="start"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Has the tortoise-rabbit race started yet?"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="start"
        />
</LinearLayout>

Mou icon

No change?

Mou icon

Believe that you will understand after reading this picture.
When set to true, the alignment of the layout_weight property control is aligned according to the content inside the control, and when set to false, it is aligned according to the top of the control.