Align layout to extreme left inside Toolbar android

Question

I am trying to align imageview to the extreme left of my toolbar but it's not happening. I tried other solutions on stackoverflow but none is working for me

<android.support.v7.widget.Toolbar
        android:id="@+id/my_toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="#fff"
        android:elevation="4dp"
        android:gravity="start"
        android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:weightSum="10">

            <ImageView
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_gravity="start"
                android:layout_weight="2"
                android:padding="10dp"
                android:src="@drawable/app_icon_book_sumary_one" />
        </LinearLayout>
    </android.support.v7.widget.Toolbar>

Answer 1

Adding these 2 lines inside toolbar worked

app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"

Answer 2

Set this attribute on your toolbar

app:contentInsetStartWithNavigation="0dp