CoordinatorLayout使用浅析
CoordinatorLayout是design包中的控件,作为外层控件可以协调子控件从而实现炫酷的效果等。
compile 'com.android.support:design:25.4.0'
在android studio中有一个ScrollingActivity的模板
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<?xml version="1.0" encoding="utf-8"?>
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<android.support.design.widget.CoordinatorLayout
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xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:fitsSystemWindows="true"
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tools:context="com.yechaoa.materialdesign.activity.ScrollingActivity">
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<android.support.design.widget.AppBarLayout
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android:id="@+id/app_bar"
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android:layout_width="match_parent"
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android:layout_height="@dimen/app_bar_height"
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android:fitsSystemWindows="true"
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android:theme="@style/AppTheme.AppBarOverlay">
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<android.support.design.widget.CollapsingToolbarLayout
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android:id="@+id/toolbar_layout"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:fitsSystemWindows="true"
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app:contentScrim="?attr/colorPrimary"
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app:layout_scrollFlags="scroll|exitUntilCollapsed"
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app:toolbarId="@+id/toolbar">
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<android.support.v7.widget.Toolbar
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android:id="@+id/toolbar"
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android:layout_width="match_parent"
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android:layout_height="?attr/actionBarSize"
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app:layout_collapseMode="pin"
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app:popupTheme="@style/AppTheme.PopupOverlay"/>
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</android.support.design.widget.CollapsingToolbarLayout>
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</android.support.design.widget.AppBarLayout>
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<include layout="@layout/content_scrolling"/>
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<android.support.design.widget.FloatingActionButton
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android:id="@+id/fab"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_margin="@dimen/fab_margin"
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app:layout_anchor="@id/app_bar"
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app:layout_anchorGravity="bottom|end"
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app:srcCompat="@android:drawable/ic_dialog_email"/>
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</android.support.design.widget.CoordinatorLayout>
include:
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<?xml version="1.0" encoding="utf-8"?>
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<android.support.v4.widget.NestedScrollView
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xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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app:layout_behavior="@string/appbar_scrolling_view_behavior"
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tools:context="com.yechaoa.materialdesign.activity.ScrollingActivity"
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tools:showIn="@layout/activity_scrolling">
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<TextView
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_margin="@dimen/text_margin"
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android:text="@string/large_text"/>
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</android.support.v4.widget.NestedScrollView>
外层是CoordinatorLayout,然后是AppBarLayout,然后是内容区和FloatingActionButton
这个AppBarLayout是有固定高度的,然后里面包着Toolbar,Toolbar外层是CollapsingToolbarLayout,是可折叠的
CollapsingToolbarLayout主要参数是app:layout_scrollFlags:
scroll :想要触发滑动事件,必须要加上这个属性,不加最后会停在顶端,比如Tablayout
exitUntilCollapsed :表示滑动到最后折叠在顶端
enterAlways :表示向上滑动消失,向下滑动可见
Toolbar主要参数app:layout_collapseMode:
pin :固定模式,在折叠的时候最后固定在顶端
parallax :视差模式,在折叠的时候会有个视差折叠的效果。
只有在内容区可滑动的状态下会触发效果,所以内容区外层是NestedScrollView,app:layout_behavior="@string/appbar_scrolling_view_behavior"属性触发滑动效果,
所以内容区需要可滑动且加上app:layout_behavior属性才能触发滑动效果,换成RecycleView加上app:layout_behavior属性也是可以的
图二效果:
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<?xml version="1.0" encoding="utf-8"?>
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<android.support.design.widget.CoordinatorLayout
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xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:fitsSystemWindows="true"
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tools:context="com.yechaoa.materialdesign.activity.TabViewPagerScrollActivity">
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<android.support.design.widget.AppBarLayout
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android:id="@+id/app_bar"
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android:layout_width="match_parent"
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android:layout_height="@dimen/app_bar_height"
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android:fitsSystemWindows="true"
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android:theme="@style/AppTheme.AppBarOverlay">
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<android.support.design.widget.CollapsingToolbarLayout
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android:id="@+id/toolbar_layout"
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android:layout_width="match_parent"
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android:layout_height="220dp"
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android:fitsSystemWindows="true"
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app:contentScrim="?attr/colorPrimary"
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app:layout_scrollFlags="scroll|exitUntilCollapsed"
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app:title="@string/app_name"
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app:toolbarId="@+id/toolbar">
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<ImageView
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:contentDescription="@string/app_name"
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android:fitsSystemWindows="true"
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android:scaleType="centerCrop"
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android:src="@drawable/header"
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app:layout_collapseMode="parallax"/>
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<android.support.v7.widget.Toolbar
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android:id="@+id/toolbar"
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android:layout_width="match_parent"
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android:layout_height="?attr/actionBarSize"
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app:layout_collapseMode="pin"
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app:popupTheme="@style/AppTheme.PopupOverlay"/>
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</android.support.design.widget.CollapsingToolbarLayout>
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<android.support.design.widget.TabLayout
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android:id="@+id/tab_layout"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:layout_alignParentBottom="true"
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android:background="@color/white"
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app:tabIndicatorColor="@color/red"
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app:tabMode="fixed"
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app:tabSelectedTextColor="@color/black"
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app:tabTextColor="@color/gray"/>
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</android.support.design.widget.AppBarLayout>
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<android.support.v4.view.ViewPager
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android:id="@+id/view_pager"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
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</android.support.design.widget.CoordinatorLayout>
github:https://github.com/yechaoa/MaterialDesign
文章来源: blog.csdn.net,作者:yechaoa,版权归原作者所有,如需转载,请联系作者。
原文链接:blog.csdn.net/yechaoa/article/details/78542067
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