如何更改 SwitchPreference 的 fontFamily 和 textSize？

Question

How can i change those font attributes of a SwitchPreference?

I already tried to use app:layout attribute with the following layout:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <TextView
        android:id="@android:id/title"
        style="@android:style/TextAppearance.Widget.TextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:fontFamily="MY-FONT"
        android:text="Title" />

    <TextView
        android:id="@android:id/summary"
        style="@android:style/TextAppearance.Widget.TextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:fontFamily="MY-FONT"
        android:text="Summary" />    
</LinearLayout>

That doesn't work well, because the switch was missing and everything looks a bit messy.

What is an easy (and working) way to customize the fontfamily and textSize?

Answer 1

You need to create a Custom Switch Preference by extending its main class

public class CustomSwitchPreference extends SwitchPreference {
    public CustomSwitchPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    public CustomSwitchPreference(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    public CustomSwitchPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public CustomSwitchPreference(Context context) {
        super(context);
    }

    @Override
    public void onBindViewHolder(PreferenceViewHolder holder) {
        super.onBindViewHolder(holder);
        TextView title1= (TextView) holder.findViewById(android.R.id.title);
        title1.setTypeface(ResourcesCompat.getFont(getContext(),R.font.noto_sans_regular));
        TextView title2= (TextView) holder.findViewById(android.R.id.summary);
        title2.setTypeface(ResourcesCompat.getFont(getContext(),R.font.noto_sans_regular));
    }
}

and use this is in your preferences xml

from

<SwitchPreference 
   .....
/>

to

<com.example.myapp.CustomSwitchPreference
....
/>

This Worked for me

Answer 2

To change the font family in android first you need to have the font in your app something like this Your font goes in the font directory under res

Now to use it, your going in the right way

 <Button
            ...

            android:fontFamily="@font/nameOfFont"
            ... />

Let me now if it works for you