Transparent action bar and status bar like Uber

I've done a few researches on this topic but I couldn't found some solution for my App/ Activity.

1. I have tried to get a transparent action bar.

First, I have tried to change the themes in my AndroidManifest.xml:

values/styles.xml:

<style name="AppTheme.ActionBar.Transparent" parent="AppTheme">
    <item name="android:windowContentOverlay">@null</item>
    <item name="windowActionBarOverlay">true</item>
    <item name="colorPrimary">@android:color/transparent</item>

and

values-v21/styles.xml:

  <style name="AppTheme.ActionBar.Transparent" parent="AppTheme">
        <item name="colorPrimary">@android:color/transparent</item>
    </style>

But thats the result:

So I only get some light grey action bar with some gaps on the left/ right side.

Second, I have tried using fitsSystemWindow="true" and android:background="@android:color/transparent" in my layouts, but it also didn't fix the issue.

 <?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"
    android:fitsSystemWindows="true"
    tools:context="com.example.poweranimal.letsgo.Application.MainActivity">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@android:color/transparent">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"/>


    </android.support.design.widget.AppBarLayout>

    <include layout="@layout/content_main" />

    </android.support.design.widget.CoordinatorLayout>

But I get the same output as before:( 2. In addition I have tried also the get a transparent status bar with:

getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);

and

<item name="android:statusBarColor">@android:color/transparent</item>

but this didn't work too (nothing has changed).

What I actually want is something like this:

Would be cool if anyone has a possible solution for me.

Thanks in advance.