崩溃的工具栏和片段布局无法一起使用 [英] android - collapsing toolbar and fragment layout not working together
问题描述
在我的应用程序中，我有两个片段和一个MainActivity.activity_main.xml包含一个折叠式工具栏，当片段为空时，该工具栏非常适合我.在我的第一个片段中，我从服务器获取json数据，并将其放入片段活动内的listview中.数据已正确获取并显示，但是listview占据了整个屏幕，而我折叠的工具栏似乎有点小虫子，就像有时它弹出并消失了，并且listview不再可滚动了.这两项活动根本无法协同工作.有没有办法让他们一起工作?我的activity_main.xml:
In my app I have two fragments and a MainActivity. The activity_main.xml contains a collapsing toolbar which works perfectly for me when the fragments are empty. In my first fragment I fetch json data from a server and put it into a listview inside the fragment activity. The data is fetched and shown correctly, but the listview takes the whole screen and my collapsing toolbar seems to be a little buggy, like sometimes it pops up and disappears and my listview is not scrollable anymore. The two activities aren’t working together at all. Is there a way to make them work together? My activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="@+id/appBar"
android:layout_width="match_parent"
android:layout_height="150dp"
android:fitsSystemWindows="true"
android:theme="@style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:expandedTitleGravity="center|bottom"
app:expandedTitleMarginBottom="56dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:toolbarId="@+id/toolbar">
<ImageView
android:id="@+id/backg"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
android:src="@drawable/backthree"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?android:attr/actionBarSize"
android:layout_marginBottom="48dp"
android:gravity="right"
app:layout_collapseMode="pin"
app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="@+id/frame_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@+id/navigation"
android:animateLayoutChanges="true">
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@android:color/white"
android:text="TextView" />
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:textColor="@android:color/white"
android:text="TextView" />
</FrameLayout>
<android.support.v4.widget.NestedScrollView
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
</RelativeLayout>
</android.support.v4.widget.NestedScrollView>
<android.support.design.widget.BottomNavigationView
android:id="@+id/navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_gravity="bottom"
android:background="@android:color/white"
app:itemIconTint="@android:color/darker_gray"
app:itemTextColor="@android:color/darker_gray"
app:menu="@menu/navigation" >
</android.support.design.widget.BottomNavigationView>
</android.support.design.widget.CoordinatorLayout>
我的fragment_first.xml:
My fragment_first.xml:
<RelativeLayout android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorGrayHell"
xmlns:android="http://schemas.android.com/apk/res/android">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp">
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<ListView
android:id="@+id/list"
android:layout_marginLeft="7dp"
android:layout_marginRight="7dp"
android:layout_marginTop="10dp"
android:layout_width="fill_parent"
android:background="@android:color/white"
android:dividerHeight="10dp"
android:divider="@color/colorGrayHell"
android:layout_height="wrap_content" />
</android.support.v4.widget.SwipeRefreshLayout>
</RelativeLayout>
</RelativeLayout>
推荐答案
您没有提到片段的附加位置-我假设在NestedScrollView中?如果没有，那就是他们应该去的地方.
You haven't mentioned where the fragments are attached - I assume within the NestedScrollView? If not, that's where they should go.
问题很可能是片段中的ListView-与RecyclerView不同，它没有实现折叠工具栏功能所需的NestedScrollingChild2和ScrollingView.
The problem is most likely the ListView within the fragment - unlike a RecyclerView, it does not implement NestedScrollingChild2 and ScrollingView, which are required for the collapsing toolbar functionality.
用RecyclerView替换ListView，并确保片段在NestedScrollView中，该片段具有 app:layout_behavior ="@ string/appbar_scrolling_view_behavior" ，并且可以正常工作.
Replace the ListView with a RecyclerView and make sure the fragments are within the NestedScrollView that has app:layout_behavior="@string/appbar_scrolling_view_behavior" and it should work.
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