reduce left margin of navigation icon of toolbar in android
<p>as i'm new to android i set back button in my toolbar, i want to reduce its padding/margin from left how can i do that??
thanks in adwance.</p>

<p>this is my design code</p>

<pre><code>&lt;android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay"&gt;
&lt;TextView
android:id="@+id/tripidtoolbar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:text="name"
android:textColor="#ffffff"
android:textSize="18sp"
android:textStyle="bold"
/&gt;
&lt;TextView
android:id="@+id/dayNotoolbar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:textColor="#ffffff"
android:layout_marginRight="10dp"
android:text="day"
android:textAllCaps="true"
android:textSize="18sp"
android:textStyle="bold"
/&gt;
&lt;/android.support.v7.widget.Toolbar&gt;
</code></pre>

<p>this is how i manually set back button</p>

<pre><code>protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_vouchers_details);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setNavigationIcon(R.drawable.arrowbackwhite);
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onBackPressed();
}
});
setSupportActionBar(toolbar);
</code></pre>

<p>this is my <strong>screen</strong>(back button havin left margin)<br>
<img src="https://i.stack.imgur.com/uzUzo.png"/></p>