Get system attributes in android custom View

We all know that in android development, the method of obtaining custom parameters of custom View is:

TypedArray array=context.obtainStyledAttributes(attrs,R.styleable.Horiz);

We can get these custom parameters:

app:defaultValue="5"

app:valueFrom="2"

app:valueTo="10"

But sometimes we want to get the parameters of the system View itself, like this:

android:layout_width="200dp"

android:textSize="32sp"

android:columnCount="3"

In fact, the acquisition method is still like this:

TypedArray array=context.obtainStyledAttributes(attrs,R.styleable.Hori);

Just refer to the "android:" namespace when defining attrs.

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

<resources>

<declare-styleable name="Horiz">

<attr name="android:textSize"/>

<attr name="android:textColor"/>

<attr name="android:defaultValue"/>

<attr name="android:valueFrom"/>

<attr name="android:valueTo"/>

<attr name="android:columnCount"/>

</declare-styleable>

</resources>

In this way, you can directly use the commonly used android naming when layout custom View.

<com.xiaoyifei.horizo

android:id="@+id/id_horizontal_picker"

android:layout_width="200dp"

android:background="#000000"

android:textSize="32sp"

android:textColor="@android:color/white"

android:defaultValue="5"android:valueFrom="2"

android:valueTo="10"

android:columnCount="3"

android:layout_height="50dp"/>