求助：CollapsingToolbarLayout如何性能优化

CarsonWoo 2018-05-25 01:49:43

最近在试着开发一个app 其中在一个Fragment中运用到了CollaspingToolbarLayout这个布局以想实现一个下滑时用户头像自动缩进的功能。但是每次切换fragment时每当滑动（即用户头像出现）时就显得异常地卡顿而当头像滑出屏幕时（下面嵌套了一个tablayout+viewpager+recyclerview）滑动recyclerview时则不会卡顿反而很流畅想问问大神们是这个布局放在fragment中会特别卡顿吗我应该怎么去改善性能呢？

附上我布局的xml

<android.support.design.widget.CoordinatorLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    tools:context="com.example.carson.graphsgo.Views.User.UserFragment">



    <!--will be so slow switching must to give it up.-->

    <android.support.design.widget.AppBarLayout

        android:id="@+id/app_bar_user"

        android:layout_width="match_parent"

        android:layout_height="wrap_content">



        <android.support.design.widget.CollapsingToolbarLayout

            android:id="@+id/collapsing_toolbar"

            android:layout_width="match_parent"

            android:layout_height="180dp"

            app:contentScrim="@color/colorSub"

            app:layout_scrollFlags="scroll">



            <RelativeLayout

                app:layout_collapseMode="none"

                android:layout_width="match_parent"

                android:layout_height="match_parent">

                <de.hdodenhof.circleimageview.CircleImageView

                    android:id="@+id/civ_user_portrait"

                    android:layout_marginTop="30dp"

                    android:layout_centerHorizontal="true"

                    android:src="@drawable/bg_user_banner"

                    android:layout_width="95dp"

                    android:layout_height="95dp" />



                <TextView

                    android:id="@+id/tv_name_user_fragment"

                    android:textSize="18.5sp"

                    android:textColor="@android:color/white"

                    android:layout_marginTop="140dp"

                    android:layout_centerHorizontal="true"

                    android:hint="@string/word_username"

                    android:layout_width="wrap_content"

                    android:layout_height="wrap_content" />



            </RelativeLayout>



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







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



    <android.support.v4.widget.NestedScrollView

        android:id="@+id/nest_sv_user"

        android:fillViewport="true"

        app:layout_behavior="@string/appbar_scrolling_view_behavior"

        android:layout_width="match_parent"

        android:layout_height="match_parent">



        <LinearLayout

            android:orientation="vertical"

            android:layout_width="match_parent"

            android:layout_height="wrap_content">



            <android.support.design.widget.TabLayout

                android:id="@+id/tab_layout_fragment_user"

                app:tabGravity="fill"

                app:tabSelectedTextColor="@color/colorSub"

                app:tabIndicatorColor="@color/colorSub"

                android:layout_width="match_parent"

                android:layout_height="wrap_content">



                <android.support.design.widget.TabItem

                    android:text="活动"

                    android:layout_width="wrap_content"

                    android:layout_height="wrap_content" />



                <android.support.design.widget.TabItem

                    android:text="作品"

                    android:layout_width="wrap_content"

                    android:layout_height="wrap_content" />



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



            <android.support.v4.view.ViewPager

                android:id="@+id/container_fragment_user"

                android:layout_marginTop="2dp"

                android:layout_width="match_parent"

                android:layout_height="match_parent" />



        </LinearLayout>



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



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