Transparent StatusBar,Actionar Hack

activity.xml

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">
    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/offer_list_collapsing"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            android:minHeight="?attr/actionBarSize"
            app:layout_scrollFlags="scroll|enterAlwaysCollapsed|enterAlways">

            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="@color/gray_fb"
                android:fitsSystemWindows="true">

                <android.support.v7.widget.RecyclerView
                    android:id="@+id/recyclerView_theme_products"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent" />

                <TextView
                    android:id="@+id/error_textview"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_centerInParent="true"
                    android:gravity="center"
                    android:text=""
                    android:textColor="@color/text_color_gray"
                    android:textSize="18sp"
                    android:visibility="gone" />

            </FrameLayout>

            <android.support.v7.widget.Toolbar
                android:id="@+id/extended_toolbar"
                android:layout_width="match_parent"
                android:layout_height="@dimen/toolbar_size"
                android:fitsSystemWindows="true"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
        </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout>
</android.support.v4.widget.DrawerLayout>

  

Java Code

    toolbar = (Toolbar) findViewById(R.id.extended_toolbar);
    toolbar.setPadding(0, CommonUtils.getStatusBarHeight(this), 0, 0);
    setSupportActionBar(toolbar);
    ActionBar actionBar = getSupportActionBar();
    assert actionBar != null;
     actionBar.setDisplayHomeAsUpEnabled(true);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        toolbar.setElevation(8);
    }
   //Code for transparent actionbar and status bar
    actionBarDrawable = new ColorDrawable(getResources().getColor(R.color.action_bar_color));
    actionBarDrawable.setAlpha(0);
    toolbar.setBackgroundDrawable(actionBarDrawable);
    setStatusBarColor(0);

   recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);
            try {
                scrolledDistance += dy;
                final int headerHeight = (int) CommonUtils.convertDpToPixel(180, ThemeDetailsActivity.this);
                final float ratio = (float) Math.min(Math.max(scrolledDistance, 0), headerHeight) / headerHeight;
                int alpha = (int) (ratio * 255);

                actionBarDrawable.setAlpha(alpha);
                toolbar.setBackgroundDrawable(actionBarDrawable);
                setStatusBarColor(alpha);

            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        @Override
        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
            super.onScrollStateChanged(recyclerView, newState);

        }
    });
   ```java