How to change android toolbar back arrow

In this android programming source code example, we are going to explore how to change android toolbar back arrow.

Below is a step by step source code to change android toolbar back arrow.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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:fitsSystemWindows="true"
    tools:context=".toolbar.Toolbar14">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar_top"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:background="@color/colorPrimaryDark"
        android:minHeight="?attr/actionBarSize"
        app:popupTheme="@style/AppTheme.PopupOverlay" >
    </android.support.v7.widget.Toolbar>

</android.support.design.widget.CoordinatorLayout>

MainActivity.java

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;


public class Toolbar14 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_toolbar14);

        Toolbar toolbar = findViewById(R.id.toolbar_top);
        toolbar.setTitle("Change Back Arrow");
        setSupportActionBar(toolbar);
        getSupportActionBar();
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        toolbar.setNavigationIcon(R.drawable.ic_home_black_24dp);
    }
}

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