我正在开发一个Android应用,我在其中使用CoordinatorLayout
,AppBarLayout
和CollapsingToolbarLayout
来使用折叠工具栏功能。
我在布局中使用NestedScrollView
来展开和折叠相同布局中的AppBarLayout
。当我尝试从屏幕中心向上滚动时,它不起作用,但当我尝试从屏幕右上角向上滚动屏幕时,它会顺利滚动。
下面提到的是我的xml文件
layout.xml
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:fillViewport="true"
android:fitsSystemWindows="true"
android:paddingBottom="2dp"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:paddingTop="5dp"
android:layout_gravity="fill_vertical"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/fragment_back_color"
android:orientation="vertical">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="5dp">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="@drawable/new_recharge" />
<com.spiceladdoo.views.RobotTextviewRegular
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="10dp"
android:text="NEW PAYMENT"
android:textColor="@color/offer_name_text_color" />
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:background="@color/white"
android:paddingBottom="20dp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingTop="20dp">
<HorizontalScrollView
android:id="@+id/hsv"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:fillViewport="true"
android:measureAllChildren="false"
android:scrollbars="none">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:orientation="horizontal">
<LinearLayout
android:id="@+id/wallet_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/wallet_recharge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="@drawable/wallet_recherge" />
<com.spiceladdoo.views.RobotTextviewRegular
android:layout_width="65dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="5dp"
android:gravity="center"
android:text="WALLET"
android:textColor="@color/offer_name_text_color"
android:textSize="12sp" />
>
</LinearLayout>
<View
android:layout_width="5dp"
android:layout_height="20dp"
android:background="@color/white" />
<LinearLayout
android:id="@+id/prepaid_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/prepaid_recharge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="@drawable/prepaid_recherge" />
<com.spiceladdoo.views.RobotTextviewRegular
android:layout_width="65dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="5dp"
android:gravity="center"
android:text="PREPAID"
android:textColor="@color/offer_name_text_color"
android:textSize="12sp" />
>
</LinearLayout>
<View
android:layout_width="5dp"
android:layout_height="20dp"
android:background="@color/white" />
<LinearLayout
android:id="@+id/postpaid_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/postpaid_recharge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="@drawable/postpaid_recherge" />
<com.spiceladdoo.views.RobotTextviewRegular
android:layout_width="65dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="5dp"
android:gravity="center"
android:text="POSTPAID"
android:textColor="@color/offer_name_text_color"
android:textSize="12sp" />
>
</LinearLayout>
<View
android:layout_width="5dp"
android:layout_height="20dp"
android:background="@color/white" />
<LinearLayout
android:id="@+id/dth_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/dth_recharge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="@drawable/dth_recherge" />
<com.spiceladdoo.views.RobotTextviewRegular
android:layout_width="65dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="5dp"
android:gravity="center"
android:text="DTH"
android:textColor="@color/offer_name_text_color"
android:textSize="12sp" />
>
</LinearLayout>
<View
android:layout_width="5dp"
android:layout_height="20dp"
android:background="@color/white" />
<LinearLayout
android:id="@+id/landline_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/landline_recharge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="@drawable/landline_recherge" />
<com.spiceladdoo.views.RobotTextviewRegular
android:layout_width="65dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="5dp"
android:gravity="center"
android:text="LANDLINE"
android:textColor="@color/offer_name_text_color"
android:textSize="12sp" />
>
</LinearLayout>
<View
android:layout_width="5dp"
android:layout_height="20dp"
android:background="@color/white" />
<LinearLayout
android:id="@+id/datacard_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/datacard_recharge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="@drawable/datacard_recherge" />
<com.spiceladdoo.views.RobotTextviewRegular
android:layout_width="65dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="5dp"
android:gravity="center"
android:text="DATACARD"
android:textColor="@color/offer_name_text_color"
android:textSize="12sp" />
>
</LinearLayout>
</LinearLayout>
</HorizontalScrollView>
</RelativeLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingBottom="10dp"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:paddingTop="10dp">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="@drawable/recent" />
<com.spiceladdoo.views.RobotTextviewRegular
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="10dp"
android:text="RECENT"
android:textColor="@color/offer_name_text_color" />
</LinearLayout>
<ListView
android:id="@+id/recent_recharge_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp">
</ListView>
</LinearLayout>
<FrameLayout xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/recharge_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="visible"
tools:ignore="MergeRootFrame">
</FrameLayout>
</RelativeLayout>
</android.support.v4.widget.NestedScrollView>
当我尝试从屏幕中心向上滚动时,所需的结果是当我从移动设备的右上角向上滚动时,它应该像smmoth一样工作。
请观看下面提到的视频,以便更清楚地查看问题
https://www.dropbox.com/s/gscfc8vfc7kkpxp/device-2015-12-30-160119.mp4?dl=0
答案 0 :(得分:31)
我相信,我已经钉了它:
您可以找到源代码 here - 随意尝试;
我以google\designlibdemo为例。
以下是Activity
的样子:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/drawer_layout"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:fitsSystemWindows="true">
<include layout="@layout/include_list_viewpager"/>
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_height="match_parent"
android:layout_width="wrap_content"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header"
app:menu="@menu/drawer_view"/>
</android.support.v4.widget.DrawerLayout>
托管ViewPager
:include_list_viewpager.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/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent">
<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.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|enterAlways|snap"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginEnd="64dp"
android:fitsSystemWindows="true">
<ImageView
android:id="@+id/image"
android:src="@drawable/header_image"
android:layout_width="match_parent"
android:layout_height="200dp"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax"/>
<View
android:background="#AA50AA00"
android:layout_width="match_parent"
android:layout_height="200dp"
app:layout_collapseMode="parallax"/>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:title=""
android:layout_height="?attr/actionBarSize"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:background="#50AA00"
app:tabMode="scrollable"
app:tabIndicatorColor="#FFF"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
CollapsingToolbarLayout
主持人Toolbar
(app:layout_collapseMode="pin"
)以及ImageView
(app:layout_collapseMode="parallax"
)。
ViewPager Fragment中的托管具有以下布局:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:fillViewport="true"
android:fitsSystemWindows="true"
android:layout_gravity="fill_vertical"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<LinearLayout
android:orientation="vertical"
android:background="#DDD"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="16dp">
<ImageView
android:src="@drawable/mobile"
android:layout_marginTop="2dp"
android:layout_width="16dp"
android:layout_height="16dp" />
<TextView
android:text="@string/prepaid_recharge"
android:layout_marginStart="16dp"
android:layout_gravity="center_vertical"
android:textColor="#000"
android:fontFamily="sans-serif-medium"
android:textSize="14sp"
android:textAllCaps="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
........
<ListView
android:id="@+id/recent_recharge_list"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
所以它有这种行为app:layout_behavior="@string/appbar_scrolling_view_behavior"
并填充ViewPort
(android:fillViewport="true"
)
实际上 - 这就是你所需要的一切。 Fragment
类是非常标准的:
public class RechargeFragment extends Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.recharge_fragment, container, false);
}
}
Activity
也非常标准。
同样,您可以找到我的代码示例here。
NB!我发现它在模拟器上工作得很差(根本不光滑)。
我希望,这有帮助。
答案 1 :(得分:5)
在android:clickable="true"
的子视图中尝试NestedScrollView
,如下所示:
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:clickable="true">
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
答案 2 :(得分:3)
在使用CoordinatorLayout
AppbarLayout
,CollapsingToolbarLayout
和NestedScrollView
作为子视图时,我几乎遇到了类似的问题。
以下代码直接来自我的项目工作区。希望它有帮助!!
<?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/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent">
<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.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="@+id/cover_pic"
android:layout_width="match_parent"
android:layout_height="256dp"
android:scaleType="centerCrop"
app:layout_collapseMode="parallax"
android:src="@drawable/cookin"/>
<android.support.v7.widget.Toolbar
android:id="@+id/mToolbar"
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.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="bottom"
android:background="?attr/colorPrimary"
app:tabMode="scrollable"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<android.support.v4.view.ViewPager
android:id="@+id/tab_viewpager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</android.support.v4.widget.NestedScrollView>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_alignParentBottom="true"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_phone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_marginRight="@dimen/fab_margin"
android:visibility="invisible"
app:backgroundTint="@color/colorFAB2"
app:elevation="6dp"
android:layout_margin="5dp"
app:pressedTranslationZ="12dp"
android:src="@drawable/ic_phone_white_24dp" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_book"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="5dp"
android:layout_marginRight="@dimen/fab_margin"
android:visibility="invisible"
app:elevation="6dp"
app:backgroundTint="@color/colorFAB1"
app:pressedTranslationZ="12dp"
android:src="@drawable/ic_receipt_white_24dp" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
app:elevation="6dp"
app:backgroundTint="@color/colorAccent"
app:pressedTranslationZ="12dp"
android:layout_margin="@dimen/fab_margin"
android:src="@drawable/ic_add_white_24dp" />
</LinearLayout>
</RelativeLayout>
</android.support.design.widget.CoordinatorLayout>
答案 3 :(得分:3)
看起来像this的副本。虽然它指向&#34;解决了#34;线程,另一个与RecyclerView更相关。
我根据来自RecyclerView线程的Manolo Garcia和Kirill Boyarshinov所做的解决方案编写了我的行为。在我的情况下,在制作投掷手势时未调用onNestedFling()
,因此我入侵了onNestedPreScroll()
。我今天一直在使用NestedScroll在ViewPager中工作,在不同场景下的解决方案下面没有经过测试(尽管它基于我一年前为RecyclerView编写的类似代码)。
首次更新的行为(将{x}添加为app:layout_behavior="your.package.FlingBehavior">
的{{1}}}:
android.support.design.widget.AppBarLayout
现在它应该可以平滑滚动,但NestedScrollView(和RecyclerView)的内容可以在AppBarLayout折叠之前滚动,这看起来很奇怪。要解决它follow this answer。进行小的更改以使用public final class FlingBehavior extends AppBarLayout.Behavior {
private static final String TAG = FlingBehavior.class.getName();
private static final int TOP_CHILD_FLING_THRESHOLD = 1;
private static final float OPTIMAL_FLING_VELOCITY = 3500;
private static final float MIN_FLING_VELOCITY = 20;
boolean shouldFling = false;
float flingVelocityY = 0;
public FlingBehavior() {
}
public FlingBehavior(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, AppBarLayout child, View target,
int velocityX, int velocityY, int[] consumed) {
super.onNestedPreScroll(coordinatorLayout, child, target, velocityX, velocityY, consumed);
if (velocityY > MIN_FLING_VELOCITY) {
shouldFling = true;
flingVelocityY = velocityY;
} else {
shouldFling = false;
}
}
@Override
public void onStopNestedScroll(CoordinatorLayout coordinatorLayout, AppBarLayout abl, View target) {
super.onStopNestedScroll(coordinatorLayout, abl, target);
if (shouldFling) {
Log.d(TAG, "onNestedPreScroll: running nested fling, velocityY is " + flingVelocityY);
onNestedFling(coordinatorLayout, abl, target, 0, flingVelocityY, true);
}
}
@Override
public boolean onNestedFling(CoordinatorLayout coordinatorLayout, AppBarLayout child, View target,
float velocityX, float velocityY, boolean consumed) {
if (target instanceof RecyclerView && velocityY < 0) {
Log.d(TAG, "onNestedFling: target is recyclerView");
final RecyclerView recyclerView = (RecyclerView) target;
final View firstChild = recyclerView.getChildAt(0);
final int childAdapterPosition = recyclerView.getChildAdapterPosition(firstChild);
consumed = childAdapterPosition > TOP_CHILD_FLING_THRESHOLD;
}
// prevent fling flickering when going up
if (target instanceof NestedScrollView && velocityY > 0) {
consumed = true;
}
if (Math.abs(velocityY) < OPTIMAL_FLING_VELOCITY) {
velocityY = OPTIMAL_FLING_VELOCITY * (velocityY < 0 ? -1 : 1);
}
Log.d(TAG, "onNestedFling: velocityY - " + velocityY + ", consumed - " + consumed);
return super.onNestedFling(coordinatorLayout, child, target, velocityX, velocityY, consumed);
}
}
方法而不是fullScroll(ScrollView.FOCUS_UP)
否则您可能会注意到在快速滚动期间出现小闪烁,此处:
scrollTo(0, 0)
之后我称之为结束,但您可能希望继续进行以使其更加流畅地滚动,就像在Google Play中一样,有(我认为未解决的)关于它的帖子here。