androidcodehunter

From theme

    <style name="SearchToolbar" parent="Theme.AppCompat.Light.NoActionBar">
    //toolbar back arrow color
        <item name="android:textColorSecondary">@android:color/white</item>
        //toolbar title color
        <item name="android:textColorPrimary">@android:color/white</item>
    </style>
    
Also we can do it from java code: 

danielesegato

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.text.Editable;
import android.text.Spannable;
import android.text.TextWatcher;