CollapsingToolbarLayout не прокручивается

Question

Я пытаюсь сделать изображение внутри CollapsingToolbarLayout прокручиваемым (как в приложении Google Play). Затем я положил NestedScrollView внутри CollapsingToolbarLayout. ImageView принудительно изменяет размеры (см. Рисунок) (изображение искажено). Как это сделать правильно?

Мой макет

<android.support.design.widget.CoordinatorLayout 
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="match_parent"> 

<android.support.design.widget.AppBarLayout 
    android:id="@+id/appbar" 
    android:layout_width="match_parent" 
    android:layout_height="200dp" 
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"> 

    <android.support.design.widget.CollapsingToolbarLayout 
     android:id="@+id/collapsing_toolbar" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     app:layout_scrollFlags="scroll|exitUntilCollapsed" 
     android:fitsSystemWindows="true" 
     app:contentScrim="@color/pure_black75" 
     app:expandedTitleMarginStart="48dp" 
     app:expandedTitleMarginEnd="64dp"> 
     <android.support.v4.widget.NestedScrollView 
      android:layout_width="match_parent" 
      android:background="@color/transparent" 
      android:maxHeight="200dp" 
      android:height="200dp" 
      app:expandedTitleMarginStart="48dp" 
      app:expandedTitleMarginEnd="64dp" 
      android:layout_height="match_parent"> 
     <ImageView 
      android:id="@+id/backdrop" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:scaleType="fitXY" 
      android:src="@drawable/cat_stub" 
      app:layout_collapseMode="parallax" /> 
     </android.support.v4.widget.NestedScrollView> 

     <android.support.v7.widget.Toolbar 
      android:id="@+id/toolbar" 
      android:layout_width="match_parent" 
      android:layout_height="?attr/actionBarSize" 
      app:popupTheme="@style/ThemeOverlay.AppCompat.Light" 
      app:queryBackground="@android:color/transparent" 
      app:layout_collapseMode="pin" /> 


     </android.support.design.widget.CollapsingToolbarLayout> 
</android.support.design.widget.AppBarLayout> 
<android.support.v4.widget.NestedScrollView 
    android:layout_width="match_parent" 
    android:background="@color/transparent" 
    android:maxHeight="200dp" 
    android:layout_height="match_parent" 
    app:layout_behavior="@string/appbar_scrolling_view_behavior"> 


    <LinearLayout 
     android:layout_width="match_parent" 
     android:orientation="vertical" 
     android:layout_height="wrap_content"> 

     <ImageView 
      android:layout_width="wrap_content" 
      android:layout_height="230dp" 
      android:scaleType="fitXY" 
      android:src="@drawable/cat_stub"/> 
     <ImageView 
      android:layout_width="wrap_content" 
      android:layout_height="230dp" 
      android:scaleType="fitXY" 
      android:src="@drawable/cat_stub"/> 
     <ImageView 
      android:layout_width="wrap_content" 
      android:layout_height="230dp" 
      android:scaleType="fitXY" 
      android:src="@drawable/cat_stub"/> 


    </LinearLayout> 
</android.support.v4.widget.NestedScrollView> 



<SeekBar 
    android:layout_marginLeft="-18dp" 
    android:layout_marginRight="-18dp" 
    android:id="@+id/audio_seekbar" 
    app:layout_anchor="@id/appbar" 
    app:layout_anchorGravity="bottom" 
    android:thumb="@null" 
    android:layout_width="match_parent" 
    android:indeterminateDrawable="@drawable/apptheme_scrubber_progress_horizontal_holo_light" 
    android:progressDrawable="@drawable/apptheme_scrubber_progress_horizontal_holo_light" 
    android:layout_above="@id/video_play_pause" 
    android:layout_height="wrap_content"/> 
<android.support.design.widget.FloatingActionButton 
    android:layout_width="wrap_content" 
    android:id="@+id/fab_play_pause" 
    android:height="20dp" 
    app:layout_anchor="@id/appbar" 
    app:layout_anchorGravity="bottom|right|end" 
    android:minHeight="0dp" 
    android:scaleType="fitXY" 
    android:src="@drawable/fab_play_pause_selector" 
    app:layout_collapseMode="pin" 
    android:layout_marginTop="4dp" 
    android:padding="5dp" 
    app:backgroundTint="@color/white" 
    app:layout_scrollFlags="scroll|enterAlwaysCollapsed" 
    android:layout_height="wrap_content"/> 

Answer 1

Вы можете попытаться изменить scaleType centerCrop:

 <ImageView 
      android:id="@+id/backdrop" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:fitsSystemWindows="true" 
      android:scaleType="centerCrop" 
      app:layout_collapseMode="parallax" />