android - 折叠工具栏内容稀松布不起作用

Question

我在约束布局和Appbar布局中使用Coordinator布局以及CollapsingToolbarLayout，除了属性contentScrim之外，一切都工作正常。它没有按预期工作。当我向上滚动时，图像仍然显示在工具栏中，而不是显示我的 colorPrimary。

    <?xml version="1.0" encoding="utf-8"?>
<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"
    tools:context=".ProfileActivity">


    <android.support.design.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.design.widget.AppBarLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <android.support.design.widget.CollapsingToolbarLayout
                android:id="@+id/myCollapse"
                app:title="Fizan"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:theme="@style/mToolbar"
                app:contentScrim="?android:attr/colorPrimary"
                app:layout_scrollFlags="scroll|exitUntilCollapsed">

                <android.support.v7.widget.Toolbar
  android:layout_width="match_parent"
  android:layout_height="?android:attr/actionBarSize"
  android:theme="@style/mToolbar"
  app:layout_collapseMode="pin" />

  <ImageView
 android:layout_width="match_parent"
 android:layout_height="200dp"
 android:src="@drawable/profile"
 app:layout_collapseMode="parallax" />
 </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">

 <TextView
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
                android:text="jdkhasjkdajksdhjkashdjkhsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsahsak"
  android:textSize="35dp" />
 </android.support.v4.widget.NestedScrollView>

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


</android.support.constraint.ConstraintLayout>

Answer 1

您需要做的就是将您的 <ImageView>高于您的 <Toolbar>就像下面这样:

  <android.support.design.widget.CoordinatorLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/myCollapse"
            app:title="Fizan"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:contentScrim="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <ImageView ....../>

            <android.support.v7.widget.Toolbar
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
             app:layout_collapseMode="pin" />