我希望将滚动支持添加到CoordinatorLayout
以及AppBarLayout
和CollapsingToolbarLayout
的单个可滚动子视图中。滚动RecyclerView
或AppBarLayout
(下面的压缩代码)时,应用栏及其内容会成功滚动和折叠。但是,当尝试在LinearLayout
上方的RecyclerView
上发起滚动事件时,没有任何结果,因为LinearLayout
不知道滚动或折叠视图。
目标是让LinearLayout
充当RecyclerView
的粘性标头和AppBarLayout
的页脚,并获得与RecyclerView
相同的滚动行为,类似到Spotify's shuffle play/available offline header。事实上,如果appbar_scrolling_view_behavior
layout_behavior
可以与LinearLayout
类似地应用于RecyclerView
,那会很棒,但我想在不可滚动时会忽略该行为观点。是否有人知道此方法的解决方法,不需要在LinearLayout
中将RecyclerView
视图作为一行实现?
<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.support.design.widget.AppBarLayout
android:id="@+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="@dimen/collapsible_app_bar_height"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/gradient_banner"
app:contentScrim="@color/background_content_frame"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="@+id/image_header"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/some_image"
app:layout_collapseMode="parallax"/>
<android.support.v7.widget.Toolbar
android:id="@+id/collapsible_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:layout_collapseMode="pin"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="@dimen/slide_handle_height"
android:orientation="horizontal"
android:background="@color/slide_handle"
android:gravity="center_vertical">
<!-- three buttons -->
</LinearLayout>
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="@dimen/slide_handle_height"
android:scrollbars="vertical"
app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>
答案 0 :(得分:45)
您不需要变通方法或奇怪的东西。库支持此行为。只需将LinearLayout
替换为RecyclerView
,并将其放在<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="15dp"
android:text="Button text"/>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
:
RecyclerView
此外,您需要将其放在 android:paddingTop="30dp"
android:clipToPadding="false"
中,以便在LinearLayout后面显示:
<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.support.design.widget.AppBarLayout
android:id="@+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="@dimen/collapsible_app_bar_height"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/gradient_banner"
app:contentScrim="@color/background_content_frame"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="@+id/image_header"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/some_image"
app:layout_collapseMode="parallax"/>
<android.support.v7.widget.Toolbar
android:id="@+id/collapsible_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:layout_collapseMode="pin"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="@dimen/slide_handle_height"
android:scrollbars="vertical"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:paddingTop="30dp"
android:clipToPadding="false"/>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="15dp"
android:text="Button text"/>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
这就是它的样子:
Layout
这不是一个好设计,但它是一个解决方案。您可以在LinearLayout
内放置一个更好的#include <iostream>
#include <fstream>
#include <string>
#include <cmath>
using namespace std;
int main() {
int column, row, total, counter;
column = 1;
row = 1;
cout << "x-dimensions of array: ";
cin >> row;
cout << "y-dimensions of array: ";
cin >> column;
total = row*column;
double myArray[row][column];
double *myPtr;
myPtr = *myArray;
string input;
cout << "Enter text file name: ";
cin >> input;
ifstream inFile;
inFile.open(input);
//Check for Error
if (inFile.fail()){
cerr << "Error opening file" << endl;
exit(1);
}
for (int i = 0; i < total; i++){
inFile >> *(myPtr+i);
}
,使其像Spotify一样。
修改:添加了视频
答案 1 :(得分:8)
这是位于Toolbar
和RecyclerView
之间的粘性标题:
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_anchor="@+id/app_bar_layout"
app:layout_anchorGravity="center|bottom"
android:text="Shuffle Play"/>
为避免与Toolbar
重叠,您可以设置与AppBarLayout
和CollapsingToolbarLayout
不同的高度:
<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/main_content"
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="240dp"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="210dip"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginBottom="30dp"
app:expandedTitleMarginEnd="64dp">
<ImageView
android:id="@+id/backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="@dimen/slide_handle_height"
android:scrollbars="vertical"
app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_anchor="@id/appbar"
app:layout_anchorGravity="center|bottom"
android:text="Shuffle Play"/>
</android.support.design.widget.CoordinatorLayout>
视频演示:
此外,您可以将高度设置为Toolbar
,但需要使用自定义行为(例如此项目CoordinatorLayoutExample)制作自定义标题。我用一个没有行为的自定义标题制作了它:
<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/main_content"
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="240dp"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:collapsedTitleTextAppearance="@style/TransparentText"
app:expandedTitleTextAppearance="@style/TransparentText"
app:contentScrim="?attr/colorPrimary">
<ImageView
android:id="@+id/backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_height="80dp"
android:layout_width="match_parent"
android:minHeight="?attr/actionBarSize"
android:gravity="top"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Title"
android:textSize="20sp"
android:textColor="@android:color/white"/>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="@dimen/slide_handle_height"
android:scrollbars="vertical"
app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_anchor="@id/appbar"
app:layout_anchorGravity="center|bottom"
android:text="Shuffle Play"/>
</android.support.design.widget.CoordinatorLayout>
样式:
<style name="TransparentText" parent="@android:style/TextAppearance">
<item name="android:textColor">#00000000</item>
</style>
视频演示:
答案 2 :(得分:6)
经过一些试验和错误,这是最终为我工作的布局的精简版本:
<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:id="@+id/coordinator_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="@+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="@dimen/collapsible_app_bar_height"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:contentScrim="@color/background_content_frame"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="@+id/image_header"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="@dimen/button_bar_height"
android:scaleType="centerCrop"
android:background="@android:color/transparent"
android:src="@drawable/default_header"
android:contentDescription="@string/description_content_image"
app:layout_collapseMode="parallax"/>
<ImageView
android:id="@+id/image_header_gradient"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="@dimen/button_bar_height"
android:src="@drawable/scrim_top_bottom_banner"
app:layout_collapseMode="parallax"
tools:ignore="ContentDescription"/>
<android.support.v7.widget.Toolbar
android:id="@+id/collapsible_toolbar"
android:layout_width="match_parent"
android:layout_height="104dp"
android:minHeight="?attr/actionBarSize"
android:gravity="top"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:contentInsetStart="0dp"
app:titleMargins="0dp"
app:layout_collapseMode="pin"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="@dimen/landing_header_button_margin_horizontal"
android:layout_marginEnd="@dimen/landing_header_button_margin_horizontal"
android:layout_marginBottom="@dimen/button_bar_height"
android:layout_gravity="bottom"
android:gravity="center_vertical"
app:layout_collapseMode="parallax">
<Button
android:id="@+id/button_one"
android:layout_alignParentStart="true"
android:drawableStart="@drawable/selector_one"
android:textColor="@color/alabaster_white"
android:visibility="gone"
style="@style/Button.TextCount"/>
<Button
android:id="@+id/button_two"
android:layout_alignParentEnd="true"
android:layout_gravity="end"
android:drawableStart="@drawable/selector_two"
android:textColor="@color/alabaster_white"
android:visibility="gone"
style="@style/Button.TextCount"/>
</RelativeLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="@dimen/button_bar_height"
android:layout_gravity="bottom"
android:gravity="center_vertical"
android:orientation="horizontal"
android:background="@color/slide_handle">
<!-- three buttons -->
</LinearLayout>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical"
app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
答案 3 :(得分:3)
CoordinatorLayout
的属性用于其子级,您可以更轻松地实现相同的效果。使用
layout_anchor="@id/app_bar_layout"
和
layout_anchorGravity="bottom|right|end"
在视图中(包含您的按钮)并将其放在Toolbar
下。同时增加此视图的高程,因为当您向下滚动时,Toolbar
将与您的视图重叠。
答案 4 :(得分:2)
您可以尝试
<android.support.design.widget.CoordinatorLayout>
<android.support.design.widget.AppBarLayout>
<!-- another xml code -->
</<android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="android.support.design.widget.AppBarLayout$ScrollingViewBehavior">
<!-- your recyler view or button or textview xml code -->
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
或
您可以在strings.xml
<string name="appbar_scrolling_view_behavior" translatable="false">android.support.design.widget.AppBarLayout$ScrollingViewBehavior</string>
,您可以使用:
app:layout_behavior="@strings/appbar_scrolling_view_behavior">