2019-12-20CoordinatLayout使用

2019-12-21  本文已影响0人  奥雷里亚诺下划线_上校
    <android.support.design.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    <!--见下面1.1-->
     <include layout="@layout/toolbar_main"/>
    <!--见下面1.2-->n
     <include layout="@layout/nestedScrollView"/>
</android.support.design.widget.CoordinatorLayout>

1.1

<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/AppBarLayout01"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:elevation="0dp">
<!--必要嵌套在appbarlayout中,等于帮我们实现的默认的behaviour-->
    <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"
        />
<!--需要写scrollflags,有scroll就行-->

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

ScrollFlags共有五种常量值供AppBarLayout的Children View使用,在xml布局文件中通过app:layout_scrollFlags设置,对应的值为:scroll,enterAlways,enterAlwaysCollapsed,snap,exitUntilCollapsed;也可以在代码中通过setScrollFlags(int)方法使用,比如:

Toolbar toolbar = ... // your toolbar within an AppBarLayout
AppBarLayout.LayoutParams params = 
    (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
params.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL
    | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS);

各个属性详情见:https://www.jianshu.com/p/7caa5f4f49bd

1.2

<android.support.v4.widget.NestedScrollView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/Blue"
  app:layout_behavior="android.support.design.widget.AppBarLayout$ScrollingViewBehavior">
         <!--需要带有系统自带的behavior-->
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">
            <include
                layout="@layout/container"
                android:visibility="visible" />
            </LinearLayout>
</android.support.v4.widget.NestedScrollView>
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