Android example to get current user preference for the scaling factor for fonts, relative to the base density scaling, by reading getResources().getConfiguration().fontScale.
MainActivity.java
package com.blogspot.android_er.androidfontscale;
import android.provider.Settings;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView prompt = (TextView)findViewById(R.id.prompt);
float fontScale = getResources().getConfiguration().fontScale;
prompt.setText("fontScale:: " + fontScale);
}
}
layout/activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp"
android:orientation="vertical"
tools:context="com.blogspot.android_er.androidfontscale.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:autoLink="web"
android:text="http://android-er.blogspot.com/"
android:textStyle="bold" />
<TextView
android:id="@+id/prompt"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
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