折叠协调器布局向上滚动25%

问题描述:

我想在RelativeLayout向上滚动25%或向下滚动75%时自动折叠RelativeLayout。折叠协调器布局向上滚动25%

这是我的布局代码如下:

<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/app_bar_layout" 
    android:layout_width="match_parent" 
    android:layout_height="350dp" 
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" 
    > 

    <android.support.design.widget.CollapsingToolbarLayout 
     android:id="@+id/collapsing_toolbar_layout" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     app:contentScrim="@color/colorPrimary" 
     app:layout_scrollFlags="scroll|enterAlways|snap" 
     > 

     <RelativeLayout 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:orientation="vertical"> 
      <ImageView 
       android:id="@+id/profile_backdrop" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:minHeight="100dp" 
       android:scaleType="centerCrop" 
       android:src="@drawable/ic_arrow_back_white_24px" 
       app:layout_collapseMode="parallax" 
       app:layout_collapseParallaxMultiplier="0.7" 
       app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed" /> 
      <TextView 
       android:id="@+id/name" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_gravity="center" 
       android:gravity="center" 
       android:text="@string/userName" 
       android:textColor="@color/white" 
       android:textSize="27sp" 
       android:layout_centerVertical="true" 
       /> 
      <TextView 
       android:id="@+id/handle" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_gravity="center" 
       android:gravity="center" 
       android:text="@string/ask" 
       android:textColor="@color/white" 
       android:textSize="20sp" 
       android:layout_below="@+id/name"/> 
     </RelativeLayout> 
     <android.support.v7.widget.Toolbar 
      android:id="@+id/collapsible_toolbar" 
      android:layout_width="match_parent" 
      android:layout_height="?attr/actionBarSize" 
      android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" 
      app:layout_collapseMode="parallax" 
      app:expandedTitleTextAppearance="@android:color/transparent" 
      app:layout_scrollFlags="scroll|enterAlways|snap" /> 
    </android.support.design.widget.CollapsingToolbarLayout> 

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

<android.support.v4.widget.NestedScrollView 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    app:layout_behavior="@string/appbar_scrolling_view_behavior" 
    app:layout_scrollFlags="scroll|enterAlways|snap"> 

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

     <Button 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:padding="15dp" 
      android:text="Button text"/> 

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

我尝试添加了少量的标签做,但他们都不工作。 在此先感谢。

尝试将您的layout_scrollFlags移动到AppBarLayout

<android.support.design.widget.AppBarLayout 
    android:id="@+id/app_bar_layout" 
    android:layout_width="match_parent" 
    android:layout_height="350dp" 
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" 
    app:layout_scrollFlags="scroll|enterAlways|snap"> 

    <android.support.design.widget.CollapsingToolbarLayout 
     android:id="@+id/collapsing_toolbar_layout" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     app:contentScrim="@color/colorPrimary">