How to make icons in the ToolBar like on the screen?

Question

Java

How to do it like in the picture?
That's what I have at the moment
, I don't have anything there, I tried to add icons, but nothing comes out.
Here is the activation code:

<android.support.v4.widget.DrawerLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <!-- The ActionBar displayed at the top -->
        <include
            layout="@layout/toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

        <!-- The main content view where fragments are loaded -->
    </LinearLayout>

    <!-- The navigation drawer that comes from the left -->
    <!-- Note that `android:layout_gravity` needs to be set to 'start' -->

    <android.support.design.widget.NavigationView
        android:id="@+id/nvView"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="@android:color/white"
        app:menu="@menu/list"
        app:headerLayout="@layout/nav_header"
        />

     <LinearLayout
         android:layout_width="1dp"
         android:layout_height="1dp"
         android:paddingBottom="1dp"
         android:paddingTop="1dp">
     <ListView
         android:id="@+id/task_list"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingBottom="5dp"
         android:paddingTop="150dp"
         android:paddingLeft="3dp"
         android:nestedScrollingEnabled="false" />
     </LinearLayout>
     <LinearLayout
        android:layout_width="130dp"
        android:layout_height="50dp"
        android:orientation="horizontal"
         android:baselineAligned="true"
         android:paddingTop="10dp"
         android:gravity="top">

        <EditText
            android:id="@+id/task_input"
            android:layout_width="273dp"
            android:layout_height="wrap_content"
            android:ems="10"
            android:inputType="text"
            android:hint="@string/input_hint"
            android:paddingBottom="5dp"
            android:paddingRight="30dp"
            android:layout_marginTop="65dp"
            android:elegantTextHeight="false"
            android:editable="true">
            <requestFocus />
        </EditText>

        <Button
            android:id="@+id/submit_button"
            android:layout_width="wrap_content"
            android:layout_height="36dp"
            android:onClick="createTask"
            android:text="@string/submit_button"
            android:gravity="right"
            android:padding="8dp"
            android:layout_weight="4"
            android:layout_marginTop="58dp"
            android:minWidth="64dp" />
    </LinearLayout>

</android.support.v4.widget.DrawerLayout>

And this is the Toolbar:

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/toolbar"
    android:layout_height="wrap_content"
    android:layout_width="match_parent"
    android:fitsSystemWindows="true"
    android:minHeight="?attr/actionBarSize"
    app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
    android:background="?attr/colorPrimaryDark">
</android.support.v7.widget.Toolbar>

Answer 1

You need to create a menu.xml with the appropriate item icons and set the app:showAsAction="ifRoom" attribute . More details at the link .
The icons themselves can be taken, for example, here .

Answer 2

I have this file, here it is,
but there is nothing in the toolbar, I click on the settings on the phone and only the title comes out there,
this is another activity, it’s easier here, there is no navigation drawer