How to reduce the gap between navigation icon and toolbar title?

Question

My problem is the extra space between the nav-drawer icon and toolbar title. The sample images are below:

The xml view of the toolbar is

<android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:titleTextAppearance="@style/Toolbar.TitleText"
        app:popupTheme="@style/AppTheme.PopupOverlay" />

I have tried to solve this problem by using code below but no change occurred.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    //toolbar.setTitleMarginStart(0);
    toolbar.setTitleMarginStart(-8);
}

Is there any way to solve this problem ?

Answer 1

Add

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

to the ToolBar.

Complete Code :

<android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:titleTextAppearance="@style/Toolbar.TitleText"
        app:popupTheme="@style/AppTheme.PopupOverlay"
        app:contentInsetLeft="0dp"
        app:contentInsetStart="0dp"
        app:contentInsetStartWithNavigation="0dp" />