Develop Reference

blank space left even after setting match_parent

i have created an Toolbar with navigation drawer and menu, now i'm trying to add a textView and edittext on the same toolbar and place them in the center, but the problem is when i add relative layout and set width as match parent, it leases some space on the left side and the items which are to be placed in the center are shifted right.
i've pasted the code below:-
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="130dp"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?attr/colorPrimary">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="H E A D"
android:textSize="30dp"
android:layout_centerHorizontal="true"
android:textStyle="bold"
android:id="#+id/ToolbarTextView"
style="#style/Base.TextAppearance.AppCompat.Large"
android:layout_marginTop="9dp"
android:textColor="#color/colorwhite"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/ToolbarTextView"
android:layout_centerHorizontal="true"
android:text="Tagline"
android:textSize="15dp"
android:textColor="#color/colorwhite"/>
<EditText
android:layout_width="292dp"
android:layout_height="wrap_content"
android:background="#drawable/main_search"
android:padding="7dp"
android:backgroundTint="#color/colorwhite"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
android:layout_marginBottom="10dp"
android:hint="Search..."
android:id="#+id/ToolbarSearch1"/>
</RelativeLayout>
</android.support.v7.widget.Toolbar></android.support.design.widget.AppBarLayout><include layout="#layout/content_main" /><android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="#dimen/fab_margin"
app:srcCompat="#android:drawable/ic_dialog_email" />
the xml code of the mainActivity:-
<android.support.constraint.ConstraintLayout
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"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="com.strease.user.strease.MainActivity"
android:id="#+id/layout4"
tools:showIn="#layout/app_bar_main">
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerView"
android:paddingTop="5dp"
android:layout_width="match_parent"
android:layout_height="match_parent"/></android.support.constraint.ConstraintLayout>
the reference image is given below:-
Screenshot of the device is given below:-
P.S:- i need to omit the blank space and get the editText and textViews to the center of the layout(currently the are shifted towards right)
Navigation Drawer code in main Activity:-
<android.support.v4.widget.DrawerLayout
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:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start"><include
layout="#layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header_main"
app:menu="#menu/activity_main_drawer"/></android.support.v4.widget.DrawerLayout>

android:fitsSystemWindows="false"

app:contentInsetEnd="0dp"
app:contentInsetLeft="0dp"
app:contentInsetRight="0dp"
app:contentInsetStart="0dp"
Try to add above four line in your toolbar. It will resolve your problem. And make your child layout inside width match_parent and height wrap_content. And set your sub child view alignment center to horizontally. It will resolve your problem.
If still not resolve your problem then update your XML file for your layout exactly with the included layout so we can find out what exactly problem going on with your layout.

You need to add this properties to Toolbar to remove that space.
android:contentInsetEnd="0dp"
android:contentInsetLeft="0dp"
android:contentInsetRight="0dp"
android:contentInsetStart="0dp"
app:contentInsetEnd="0dp"
app:contentInsetLeft="0dp"
app:contentInsetRight="0dp"
app:contentInsetStart="0dp"
Like as below.
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:contentInsetEnd="0dp"
android:contentInsetLeft="0dp"
android:contentInsetRight="0dp"
android:contentInsetStart="0dp"
app:contentInsetEnd="0dp"
app:contentInsetLeft="0dp"
app:contentInsetRight="0dp"
app:contentInsetStart="0dp"
android:background="?attr/colorPrimary">
This will remove the default left space from Toolbar.
Here is screen shot. It seems Edit Text showing in exact center of Toolbar. Also update your minSdkVersion to 21 surely it will work.
Here is the layout code.
<android.support.design.widget.AppBarLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="130dp"
android:background="#android:color/holo_red_light"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?attr/colorAccent"
android:contentInsetEnd="0dp"
android:contentInsetLeft="0dp"
android:contentInsetRight="0dp"
android:contentInsetStart="0dp"
app:contentInsetEnd="0dp"
app:contentInsetLeft="0dp"
app:contentInsetRight="0dp"
app:contentInsetStart="0dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/ToolbarTextView"
style="#style/Base.TextAppearance.AppCompat.Large"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="9dp"
android:text="H E A D"
android:textColor="#android:color/white"
android:textSize="30dp"
android:textStyle="bold" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/ToolbarTextView"
android:layout_centerHorizontal="true"
android:text="Tagline"
android:textColor="#android:color/white"
android:textSize="15dp" />
<EditText
android:id="#+id/ToolbarSearch1"
android:layout_width="292dp"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="10dp"
android:background="#android:color/white"
android:backgroundTint="#android:color/white"
android:hint="Search..."
android:padding="7dp" />
</RelativeLayout>
</android.support.v7.widget.Toolbar>
<include layout="#layout/content_main" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="#dimen/fab_margin"
app:srcCompat="#android:drawable/ic_dialog_email" />
</android.support.design.widget.AppBarLayout>
EDIT
Add another property to toolbar for Navigation Icon.
app:contentInsetStartWithNavigation="0dp"
Now your toolbar should be as below.
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?attr/colorAccent"
android:contentInsetEnd="0dp"
android:contentInsetLeft="0dp"
android:contentInsetRight="0dp"
android:contentInsetStart="0dp"
app:contentInsetEnd="0dp"
app:contentInsetLeft="0dp"
app:contentInsetRight="0dp"
app:contentInsetStartWithNavigation="0dp"
app:contentInsetStart="0dp">
EDIT 2
I have made some changes to your layout used Linear Layout instead of Relative Layout.
<android.support.design.widget.AppBarLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="130dp"
android:background="#android:color/holo_red_light"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?attr/colorAccent"
android:contentInsetEnd="0dp"
android:contentInsetLeft="0dp"
android:contentInsetRight="0dp"
android:contentInsetStart="0dp"
app:contentInsetEnd="0dp"
app:contentInsetLeft="0dp"
app:contentInsetRight="0dp"
app:contentInsetStartWithNavigation="0dp"
app:contentInsetStart="0dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:gravity="center"
android:orientation="vertical">
<TextView
android:id="#+id/ToolbarTextView"
style="#style/Base.TextAppearance.AppCompat.Large"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="2dp"
android:text="H E A D"
android:textColor="#android:color/white"
android:textSize="30dp"
android:textStyle="bold" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Tagline"
android:layout_marginTop="2dp"
android:textColor="#android:color/white"
android:textSize="15dp" />
<EditText
android:id="#+id/ToolbarSearch1"
android:layout_width="292dp"
android:layout_height="wrap_content"
android:background="#android:color/white"
android:layout_marginTop="3dp"
android:backgroundTint="#android:color/white"
android:hint="Search..."
android:padding="7dp" />
</LinearLayout>
</android.support.v7.widget.Toolbar>
<include layout="#layout/content_main" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="#dimen/fab_margin"
app:srcCompat="#android:drawable/ic_dialog_email" />
</android.support.design.widget.AppBarLayout>

Unable to center the text in Toolbar title

Here is the image :
I have used a textview inside the toolbar and tried to center the textview using gravity="center". I want to center the textview without using margin shifts or padding shifts or translationX.
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
app:title="Train App"
app:collapseIcon="#mipmap/ic_launcher"
app:titleTextColor="#color/primaryTextColor"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
android:layout_width="match_parent"
android:contentInsetLeft="0dp"
android:contentInsetStart="0dp"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
android:contentInsetRight="0dp"
android:contentInsetEnd="0dp"
app:contentInsetRight="0dp"
app:contentInsetEnd="0dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/appTitle"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Train App"
android:gravity="center"
android:textSize="20sp"
android:textColor="#color/primaryTextColor"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_mood_white_24dp"
android:layout_alignParentRight="true"
android:layout_centerInParent="true"
android:layout_marginRight="10dp"/>
</RelativeLayout>
</android.support.v7.widget.Toolbar>

You can try to do something like this:
<FrameLayout
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:theme="#style/AppTheme.AppBarOverlay"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="center"
android:drawablePadding="#dimen/bounds_m"
android:fontFamily="#font/quicksand"
android:gravity="center"
android:text="#string/appname"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#color/white"/>
</FrameLayout>
And about ic_mood_white_24dp just go with option menu instead of putting it in toolbar.

Try this..
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/holo_blue_light"
android:contentInsetEnd="0dp"
android:contentInsetLeft="0dp"
android:contentInsetRight="0dp"
android:contentInsetStart="0dp"
app:contentInsetEnd="0dp"
app:contentInsetLeft="0dp"
app:contentInsetRight="0dp"
app:contentInsetStart="0dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/appTitle"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:gravity="center"
android:text="Train App"
android:textColor="#android:color/background_dark"
android:textSize="20sp" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerInParent="true"
android:layout_marginRight="10dp"
/>
</RelativeLayout>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>

You have to add android:layout_centerHorizontal="true" property in your TextView.
Like :
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/appTitle"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:gravity="center"
android:layout_centerHorizontal="true"
android:text="Train App"
android:textColor="#color/colorPrimary"
android:textSize="20sp" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerInParent="true"
android:layout_marginRight="10dp"
android:src="#mipmap/ic_launcher" />
</RelativeLayout>

How to achieve this type of toobar with search

I am creating a application where search box will be below of Toolbar and toolbar is scrollable . when Toolbar is not scrolled up EditText margin area will be primary color and when scrolled up margin area will be transparent ..
I am using this code..
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/myAppBar"
app:elevation="0dp"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:contentInsetStart="0dp"
app:popupTheme="#style/AppTheme.PopupOverlay">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center_vertical">
<TextView
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:layout_marginTop="2dp"
android:textSize="10sp"
android:gravity="bottom"
android:text="Current location"/>
<TextView
android:id="#+id/current_location"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:textSize="13sp"
android:gravity="top"
android:text="Fetching \nCurrent Location"/>
</LinearLayout>
</android.support.v7.widget.Toolbar>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:background="#color/white"
android:hint="Search Places"
android:textColorHint="#color/textColorSecondary"
android:drawablePadding="10dp"
android:drawableLeft="#drawable/search_black_24dp"
android:drawableStart="#drawable/search_black_24dp"
android:layout_margin="8dp"/>
</android.support.design.widget.AppBarLayout>
Expected Result
Actual Result

please use CollapsingToolbarLayout like below example :
<?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"
tools:context=".MainActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/appbar"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:titleEnabled="false"
app:layout_scrollFlags="scroll">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
app:contentInsetStartWithNavigation="0dp"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_main" />
</android.support.design.widget.CoordinatorLayout>

Support ActionMenuView change popupTheme

I implemented Toolbar with custom view and ActionMenuView and i can't change popup Theme for ActionMenuView.
My Toolbar Layout:
<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_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:elevation="4dp"
app:contentInsetEnd="0dp"
app:contentInsetLeft="0dp"
app:contentInsetRight="0dp"
app:contentInsetStart="0dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light">
<include layout="#layout/toolbar_view"/>
</android.support.v7.widget.Toolbar>
toolbar_view layout that contains the ActionMenuView:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize">
<ImageView
android:id="#+id/iv_toolbar_home"
android:layout_width="#dimen/ldrawer_drawableSize"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:background="#drawable/selector_toggle" />
<LinearLayout
android:id="#+id/ll_menu"
android:layout_alignParentRight="true"
android:gravity="right"
android:layout_width="wrap_content"
android:layout_height="match_parent">
<android.support.v7.widget.ActionMenuView
android:id="#+id/amvMenu"
android:layout_width="wrap_content"
android:layout_height="?attr/actionBarSize" />
</LinearLayout>
<TextView
android:id="#+id/tv_toolbar_title"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:ellipsize="end"
android:layout_toRightOf="#id/iv_toolbar_home"
android:layout_toLeftOf="#id/ll_menu"
android:gravity="center_vertical|left"
android:maxLines="1"
android:padding="#dimen/toolbar_title_padding"
android:textSize="#dimen/toolbar_title_font_size"
android:textColor="#color/white" />
</RelativeLayout>
And the result is:
The question is, How i can change the drop down menu background to be white?

just make your android:textColorPrimaryin your theme to be white

how to remove left margin of Android Toolbar?

I'm trying to use toolbar for my project.
Here is the code I am using:
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_alignParentTop="true"
android:background="?attr/colorPrimary"
android:contentInsetLeft="0dp"
android:elevation="#dimen/margin_padding_8dp"
android:contentInsetStart="0dp">
<RelativeLayout
android:id="#+id/rlToolbar"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/tvTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:paddingRight="#dimen/margin_padding_16dp"
android:text="AppBar"
android:textAppearance="#style/TextAppearance.AppCompat"
android:textColor="#color/white"
android:textSize="#dimen/text_size_20sp" />
</RelativeLayout>
I want to remove left margin, Here I set android:contentInsetLeft="0dp" and android:contentInsetStart="0dp" but it's not working..Please help me !

replace your xml with below xml
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_alignParentTop="true"
android:background="?attr/colorPrimary"
android:elevation="#dimen/margin_padding_8dp"
android:contentInsetStart="0dp"
android:contentInsetLeft="0dp"
android:contentInsetRight="0dp"
android:contentInsetEnd="0dp"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
app:contentInsetRight="0dp"
app:contentInsetEnd="0dp">
<RelativeLayout
android:id="#+id/rlToolbar"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/tvTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:paddingRight="#dimen/margin_padding_16dp"
android:text="AppBar"
android:textAppearance="#style/TextAppearance.AppCompat"
android:textColor="#color/white"
android:textSize="#dimen/text_size_20sp" />
</RelativeLayout>

Use app:contentInsetStart="0dp" to remove that left space.

See the below code and here I added app:contentInsetStart="0dp". You need to add that to your code because before API 21 (i.e. Lollipop) you need to add that line.
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="64dp"
android:background="#color/colorPrimary"
android:minHeight="?attr/actionBarSize"
android:contentInsetStart="0dp"
app:contentInsetStart="0dp"
>
</android.support.v7.widget.Toolbar>

Referring to #calvinfly comment:
I updated my code
<RelativeLayout
android:id="#+id/rlTop"
android:layout_width="fill_parent"
android:layout_height="?attr/actionBarSize"
android:layout_alignParentTop="true"
android:background="#android:color/white" >
<TextView
android:id="#+id/toolbar_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:gravity="center"
android:text="#string/titleString"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#468bac"
android:textStyle="bold" />
<RelativeLayout
android:id="#+id/rlStarsTop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:gravity="center"
android:layout_marginRight="2dp"
android:layout_toRightOf="#+id/toolbar_title"
android:layout_toEndOf="#+id/toolbar_title"
android:singleLine="true"
android:ellipsize="marquee"
android:marqueeRepeatLimit="marquee_forever"
android:scrollHorizontally="true">
<RatingBar
android:id="#+id/txtRatings"
style="?android:attr/ratingBarStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_margin="1dp"
android:gravity="center"
android:max="5"
android:rating="3.7"
android:textColor="#android:color/holo_blue_bright"
android:textStyle="bold" />
</RelativeLayout>
</RelativeLayout>

Just add these two lines in your toolbar.xml
app:contentInsetStart="0dp"
app:contentInsetEnd="0dp"

This works for me...
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app2="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#color/colorPrimary"
app2:contentInsetStart="0dp"/>

Add below xml code to your Toolbar !
app:contentInsetEnd="0dp"
app:contentInsetLeft="0dp"
app:contentInsetRight="0dp"
app:contentInsetStart="0dp"

Add following code to your .xml file It may solve. Perfectly working solution I have tried.
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#color/white"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
app:contentInsetRight="0dp"
app:contentInsetEnd="0dp"
app:theme="#style/toolbarPopup">
above 21 use following code
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/primaryColor"
android:contentInsetLeft="0dp"
android:contentInsetStart="0dp"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
android:contentInsetRight="0dp"
android:contentInsetEnd="0dp"
app:contentInsetRight="0dp"
app:contentInsetEnd="0dp" />

Use This Toolbar property for remove toolbar left space
app:contentInsetStart="0dp"
<androidx.appcompat.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_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#color/colorPrimary"
app:contentInsetStart="0dp">
</androidx.appcompat.widget.Toolbar>

Add below xml code to your Toolbar
<android:contentInsetLeft="0dp"
android:contentInsetStart="0dp"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
android:contentInsetRight="0dp"
android:contentInsetEnd="0dp"
app:contentInsetRight="0dp"
app:contentInsetEnd="0dp">