使用片段时如何正确实现状态栏后面的视图内容 [英] How to correctly implement view content behind statusbar when using fragments

问题描述

我正在尝试将折叠的工具栏上的ImageBackdrop放在statusBar的后面，我已经用Drawer和navigationView正确完成了，但是我无法用我的片段来完成，在cheesequare演示中，Chris做到了，而且我可以这样做，但是它没有使用单个活动应用程序和片段过渡，所以这并不是我想要的。

I'm trying put my ImageBackdrop from the collapsing toolbar behind the statusBar, I've done it right with the Drawer and the navigationView but I can't do it with my fragments, In the cheesequare demo, Chris did it, and I can do it that way, but it's not using a single activity app and fragment transitions, so that's not quite what I'm looking for.

我的样式：

 <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>

    </style>

我的v21样式：

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>

        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
        <item name="android:statusBarColor">@android:color/transparent</item>
    </style>

我的主要活动：

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
    android:id="@+id/drawer_layout"
    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:fitsSystemWindows="true">

    <include
        layout="@layout/content_main"/>

    <android.support.design.widget.NavigationView
        android:id="@+id/navigationView"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="@color/window_background_white"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header"
        app:itemTextColor="@color/title_text_color"
        app:menu="@menu/drawer_menu"/>

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

我的content_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    android:id="@+id/fragment_container"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

我的片段：

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    style="@style/AppTheme.CoordinatorLayout"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:fitsSystemWindows="true">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbarLayout"
        android:layout_width="match_parent"
        android:layout_height="@dimen/detail_backdrop_height"
        android:fitsSystemWindows="true"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar"
            android:layout_width="match_parent"
            android:layout_height="@dimen/detail_backdrop_height"
            android:fitsSystemWindows="true"
            app:collapsedTitleTextAppearance="@style/AppTheme.CollapsingToolbar.Text.Transparent"
            app:contentScrim="?attr/colorPrimaryDark"
            app:expandedTitleMarginEnd="64dp"
            app:expandedTitleMarginStart="48dp"
            app:expandedTitleTextAppearance="@style/AppTheme.CollapsingToolbar.Text.Transparent"
            app:layout_scrollFlags="scroll|enterAlwaysCollapsed|enterAlways"
            app:title="">

                <ImageView
                    android:id="@+id/imageView_backdrop"
                    android:layout_width="match_parent"
                    android:layout_height="@dimen/detail_backdrop_height"
                    android:adjustViewBounds="true"
                    android:fitsSystemWindows="true"
                    android:scaleType="centerCrop"
                    app:layout_collapseMode="parallax"/>


                <TextView
                    android:id="@+id/textView_expanded_title"
                    style="@style/AppTheme.CollapsingToolbar.TextView.Multiline"

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
                app:titleTextColor="@color/colorAccent"/>


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

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

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerView"
        style="@style/AppTheme.RecyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="fill_vertical"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

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

我不需要后面内容的另一个片段

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    style="@style/AppTheme.CoordinatorLayout"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:fitsSystemWindows="true">


    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|enterAlways|snap"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
            app:titleTextColor="@color/colorAccent"/>

        <android.support.design.widget.TabLayout
            android:id="@+id/about_tabLayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:tabGravity="fill"/>

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


    <ViewSwitcher
        android:id="@+id/viewSwitcher"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <include layout="@layout/progress_bar_color_primary"/>

        <android.support.v4.view.ViewPager
            android:id="@+id/about_viewpager"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>

    </ViewSwitcher>


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

我已完成的工作：

What I've accomplished:

如果我将 android：fitsSystemWindows = false 放在DrawerLayout中，我可以在片段中实现所需的效果，其中我有CollapsingToolbar，但是在ViewPager中，我有一个奇怪的灰色statusBar。

If I put android:fitsSystemWindows="false" in the DrawerLayout I can accomplish the desired effect in the fragment where I have the CollapsingToolbar but in the ViewPager I've a strange grey statusBar.

所需的效果与 android：fitsSystemWindows = false 在抽屉布局中：

Desired effect accomplished badly with android:fitsSystemWindows="false" in the drawerLayout:

但是在第二个片段中，内容位于statusBar后面，而我不想要它。

< a href = https://i.stack.imgur.com/UGHfYm.png rel = nofollow noreferrer>

我所读的内容：

StackOverflow ，

媒体

推荐答案

好吧，问题是总是被替换的content_main.xml，所以我认为没有必要具有android：fitsSystemWindows属性，但是我错了，添加了android： fitsSystemWindows = true解决了该问题。

Ok the problem was the content_main.xml it's always replaced so I thought it wasn't necessary to have the android:fitsSystemWindows attribute but i was wrong, adding android:fitsSystemWindows="true" solved the problem.

摘要content_main：

    <?xml version="1.0" encoding="utf-8"?>
    <android.support.design.widget.CoordinatorLayout
    android:id="@+id/fragment_container"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"/>

重要提示：如果像我一样，之后您在viewPager中发现错误coordinatorLayout的android：fitsSystemWindows = true可以在此处查看：从ViewPager第二页消失的CoordinatorLayout状态栏填充

Important: if like me after that you find a bug in viewPager when coordinatorLayout has android:fitsSystemWindows="true" take a look here: CoordinatorLayout status bar padding disappears from ViewPager 2nd page

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