请求布局（） 调用不正确

Question

我在我的控制台上收到垃圾警告。我能找到的唯一信息是，大多数人在列表视图中启用快速滚动时会得到它。我没有使用任何列表视图。它说它被CollapsingToolbarLayout，AppCompatTextView，Toolbar，有时是AppBarLayout错误地调用。每当我快速上下“投掷”嵌套滚动视图以折叠和展开工具栏时，就会发生这种情况。

日志：

06-30 22:18:42.622 19090-19090/? I/art: Not late-enabling -Xcheck:jni (already on)
06-30 22:18:43.153 19090-19090/joebruckner.lastpick.debug D/MovieShuffleActivity: false, true, false
06-30 22:18:43.205 19090-19126/joebruckner.lastpick.debug D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true

                                                                            [ 06-30 22:18:43.267 19090:19126 D/         ]
                                                                            HostConnection::get() New Host Connection established 0xea95fdb0, tid 19126
06-30 22:18:43.287 19090-19126/joebruckner.lastpick.debug I/OpenGLRenderer: Initialized EGL, version 1.4
06-30 22:18:43.806 19090-19090/joebruckner.lastpick.debug D/MovieShuffleActivity: false, true, true
06-30 22:28:49.264 19090-19090/joebruckner.lastpick.debug W/View: requestLayout() improperly called by android.support.design.widget.CollapsingToolbarLayout{5041bd9 V.ED..... ......ID 0,0-1080,525 #7f0d0074 app:id/collapsingToolbar} during layout: running second layout pass
06-30 22:28:49.264 19090-19090/joebruckner.lastpick.debug W/View: requestLayout() improperly called by android.support.v7.widget.Toolbar{612299e V.E...... ......ID 0,291-1080,438 #7f0d0069 app:id/toolbar} during layout: running second layout pass
06-30 22:28:49.277 19090-19090/joebruckner.lastpick.debug W/View: requestLayout() improperly called by android.support.design.widget.CollapsingToolbarLayout{5041bd9 V.ED..... ........ 0,0-1080,525 #7f0d0074 app:id/collapsingToolbar} during second layout pass: posting in next frame
06-30 22:28:49.456 19090-19090/joebruckner.lastpick.debug W/View: requestLayout() improperly called by android.support.design.widget.CollapsingToolbarLayout{5041bd9 V.ED..... ......ID 0,0-1080,525 #7f0d0074 app:id/collapsingToolbar} during layout: running second layout pass
06-30 22:28:49.456 19090-19090/joebruckner.lastpick.debug W/View: requestLayout() improperly called by android.support.v7.widget.Toolbar{612299e V.E...... ......ID 0,197-1080,344 #7f0d0069 app:id/toolbar} during layout: running second layout pass
06-30 22:28:49.475 19090-19090/joebruckner.lastpick.debug W/View: requestLayout() improperly called by android.support.design.widget.CollapsingToolbarLayout{5041bd9 V.ED..... ........ 0,0-1080,525 #7f0d0074 app:id/collapsingToolbar} during second layout pass: posting in next frame
06-30 22:28:49.696 19090-19090/joebruckner.lastpick.debug W/View: requestLayout() improperly called by android.support.design.widget.CollapsingToolbarLayout{5041bd9 V.ED..... ......ID 0,0-1080,525 #7f0d0074 app:id/collapsingToolbar} during layout: running second layout pass
06-30 22:28:49.696 19090-19090/joebruckner.lastpick.debug W/View: requestLayout() improperly called by android.support.v7.widget.Toolbar{612299e V.E...... ......ID 0,0-1080,147 #7f0d0069 app:id/toolbar} during layout: running second layout pass
06-30 22:28:49.741 19090-19090/joebruckner.lastpick.debug W/View: requestLayout() improperly called by android.support.design.widget.CollapsingToolbarLayout{5041bd9 V.ED..... ........ 0,0-1080,525 #7f0d0074 app:id/collapsingToolbar} during second layout pass: posting in next frame

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"
    android:id="@+id/root"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/appBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fitsSystemWindows="true">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsingToolbar"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_scrollFlags="scroll|exitUntilCollapsed"
            app:contentScrim="?attr/colorPrimary"
            app:titleEnabled="false"
            android:fitsSystemWindows="true">

            <ImageView
                android:id="@+id/backdrop"
                android:layout_width="match_parent"
                android:layout_height="200dp"
                android:contentDescription="@string/backdrop"
                android:scaleType="fitXY"  />

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_collapseMode="pin"/>
        </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout>

    <FrameLayout
        android:id="@+id/frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/appBar"
        app:layout_behavior="@string/scrolling_view"
        app:behavior_overlapTop="80dp"
        />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:src="@drawable/ic_dice_three_48dp"
        app:layout_anchor="@+id/frame"
        app:layout_anchorGravity="bottom|end"
        />
</android.support.design.widget.CoordinatorLayout>

Answer 1

此消息仅用于警告某些视图已请求布局，而其他视图（在本例中为Toolbar和CollapsingToolbarLayout）已在布局阶段请求布局。

在某些情况下，这会导致性能缺陷。您应该确定：

>

您是否有一些在滚动期间调用requestLayout（）的自定义视图/视图组？您是否有其他调用 requestLayout（） 的代码？您是否有任何代码可以执行广泛的布局子层次结构更改，例如使视图消失？

这是什么时候发生的？是不是只是在开始，就在所有视图都布置之前？

你有可疑的视图，不正确地调用requestLayout（），你需要找到谁，何时以及为什么之前进行布局重组。

Answer 2

您是否正在设置任何 AppBarLayout.OnOffsetChangedListener？如果是这样，这可能是由于布局参数归因或侦听器中此类型的任何设置值导致的。

如果是这种情况，请在主线程中设置布局属性

appBarLayout.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
        @Override
        public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {

           //post message back on main thread if you need to modify any views
        }
    });

Answer 3

我的解决方案是仅在偏移更改不同时才转发它们

       appbar.addOnOffsetChangedListener(object : AppBarLayout.OnOffsetChangedListener {
        var lastOffset = -1
        override fun onOffsetChanged(appBarLayout: AppBarLayout?, verticalOffset: Int) {
            if (lastOffset == verticalOffset) return

            lastOffset = verticalOffset
            val percentage = Math.abs(verticalOffset).toFloat() / (appBarLayout?.totalScrollRange?.toFloat() ?: 1f)
            toolbarAnimation.animate(percentage)
        }
    })