Custom Text View with Roboto font cheatsheet

attrs.xml

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

    <declare-styleable name="CustomTextView">
        <attr name="customTextViewDrawableTint" format="color"/>
        <attr name="customTextViewDrawableLeftCompat" format="reference"/>
        <attr name="customTextViewDrawableRightCompat" format="reference"/>
        <attr name="customTextViewDrawableTopCompat" format="reference"/>
        <attr name="customTextViewDrawableBottomCompat" format="reference"/>
        <attr name="customTextViewFont" format="string"/>
    </declare-styleable>

</resources>

CustomTextView.java

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.support.v4.graphics.drawable.DrawableCompat;
import android.support.v7.content.res.AppCompatResources;
import android.support.v7.widget.AppCompatTextView;
import android.util.AttributeSet;

public class CustomTextView extends AppCompatTextView {

    int tintColor;
    Drawable drawableLeft = null;
    Drawable drawableRight = null;
    Drawable drawableBottom = null;
    Drawable drawableTop = null;
    String fontTypeface = null;

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

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

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

    private void init(Context context, AttributeSet attrs) {
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.IcabbiTextView, 0, 0);
        fontTypeface = a.getString(R.styleable.CustomTextView_customTextViewFont);
        tintColor = a.getColor(R.styleable.CustomTextView_customTextViewDrawableTint, Color.BLACK);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            drawableLeft = a.getDrawable(R.styleable.CustomTextView_customTextViewDrawableLeftCompat);
            drawableRight = a.getDrawable(R.styleable.CustomTextView_customTextViewDrawableRightCompat);
            drawableBottom = a.getDrawable(R.styleable.CustomTextView_customTextViewDrawableBottomCompat);
            drawableTop = a.getDrawable(R.styleable.CustomTextView_customTextViewDrawableTopCompat);
        } else {
            final int drawableLeftId = a.getResourceId(R.styleable.CustomTextView_customTextViewDrawableLeftCompat, -1);
            final int drawableRightId = a.getResourceId(R.styleable.CustomTextView_customTextViewDrawableRightCompat, -1);
            final int drawableBottomId = a.getResourceId(R.styleable.CustomTextView_customTextViewDrawableBottomCompat, -1);
            final int drawableTopId = a.getResourceId(R.styleable.CustomTextView_customTextViewDrawableTopCompat, -1);

            if (drawableLeftId != -1)
                drawableLeft = AppCompatResources.getDrawable(context, drawableLeftId);
            if (drawableRightId != -1)
                drawableRight = AppCompatResources.getDrawable(context, drawableRightId);
            if (drawableBottomId != -1)
                drawableBottom = AppCompatResources.getDrawable(context, drawableBottomId);
            if (drawableTopId != -1)
                drawableTop = AppCompatResources.getDrawable(context, drawableTopId);
        }
        a.recycle();
        if (!isInEditMode()) {
            RobotoTypeface font = null;
            if(fontTypeface != null) {
                font = RobotoTypeface.valueOf(fontTypeface);
            }
            setTypeface(FontLoader.getInstance(getContext()).getFont(font));
        }
        drawableLeft = setTintForDrawable(drawableLeft);
        drawableRight = setTintForDrawable(drawableRight);
        drawableTop = setTintForDrawable(drawableTop);
        drawableBottom = setTintForDrawable(drawableBottom);
        setCompoundDrawablesWithIntrinsicBounds(drawableLeft, drawableTop, drawableRight, drawableBottom);

    }

    private Drawable setTintForDrawable(Drawable drawable){
        if (drawable!=null) {
            drawable = drawable.mutate();
            drawable = DrawableCompat.wrap(drawable);
            DrawableCompat.setTintMode(drawable, PorterDuff.Mode.SRC_ATOP);
            DrawableCompat.setTint(drawable, tintColor);
        }
        return drawable;
    }

    public void setTintColor(int tintColor) {
        this.tintColor = tintColor;
    }

    public void setDrawableLeft(Drawable drawable) {
        this.drawableLeft = setTintForDrawable(drawable);
        setCompoundDrawablesWithIntrinsicBounds(drawableLeft, drawableTop, drawableRight, drawableBottom);
    }

    public void setDrawableRight(Drawable drawable) {
        this.drawableRight = setTintForDrawable(drawable);
        setCompoundDrawablesWithIntrinsicBounds(drawableLeft, drawableTop, drawableRight, drawableBottom);
    }

    public void setDrawableBottom(Drawable drawable) {
        this.drawableBottom = setTintForDrawable(drawable);
        setCompoundDrawablesWithIntrinsicBounds(drawableLeft, drawableTop, drawableRight, drawableBottom);
    }

    public void setDrawableTop(Drawable drawable) {
        this.drawableTop = setTintForDrawable(drawable);
        setCompoundDrawablesWithIntrinsicBounds(drawableLeft, drawableTop, drawableRight, drawableBottom);
    }
}

demo_customtextview.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical">

    <CustomTextView
        android:id="@+id/splash_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        tools:text="Nice Roboto font"
        app:customTextViewFont="Light"
        android:textScaleX="1.15" />

</LinearLayout>

FontLoader.java

public class FontLoader {

    private Context context;
    private static FontLoader instance;

    public static FontLoader getInstance(Context context) {
        if (instance == null) {
            instance = new FontLoader(context);
        }
        return instance;
    }

    private FontLoader(Context context) {
        if (context!=null) {
            this.context = context.getApplicationContext();
        }
    }

    public Typeface getFont(RobotoTypeface typeface){
        String assetFile = RobotoTypeface.getResourceName(RobotoTypeface.Regular);
        if(typeface != null){
            assetFile = typeface.getResourceName(typeface);
        }
        return Typeface.createFromAsset(context.getAssets(), assetFile);
    }

}

RobotoTypeface.java

public enum RobotoTypeface {

    Bold,
    Light,
    Medium,
    Regular;

    // Download Font: https://fonts.google.com/specimen/Roboto?selection.family=Roboto
    // Add to project assets/Roboto-Bold.ttf, assets/Roboto-Light.ttf, ...
    public static String getResourceName(RobotoTypeface typeface){
        return "Roboto-".concat(typeface.name()).concat(".ttf");
    }

}