问题
I have a collapsing toolbar layout, below that a tab layout and below that the corresponding viewpager. I want to implement snapping such that when I collapse the collapsing toolbar layout more than half and leave it, it should snap and collapse completely. How do I do it? Here is my actual layout :
<?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:background="#231f20"
android:fitsSystemWindows="true">
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="?attr/actionBarSize"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="bottom"
android:background="#231f20"
app:layout_anchor="@+id/appbar"
app:layout_anchorGravity="bottom"
app:tabGravity="fill"
app:tabMode="fixed" />
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
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="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="#FAC80A"
app:expandedTitleMarginBottom="110dp"
app:expandedTitleMarginStart="200dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax">
<ImageView
android:id="@+id/imageView78"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:background="@drawable/user_profile_bg_img"
android:scaleType="fitXY"
android:src="@drawable/gradient" />
<ImageView
android:id="@+id/imageView82"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:elevation="10dp"
android:src="@drawable/user_profile_shape_profile_pic"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp" />
<ImageView
android:id="@+id/imageView80"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_gravity="center_vertical"
android:elevation="10dp"
android:layout_marginRight="60dp"
android:layout_marginTop="35dp" />
<ImageView
android:id="@+id/imageView81"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:elevation="10dp"
android:layout_gravity="center_vertical"
android:layout_marginRight="20dp"
android:layout_marginTop="35dp" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginLeft="30dp"
android:layout_marginTop="300dp"
android:orientation="horizontal">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:orientation="vertical"
android:paddingRight="10dp"
android:elevation="10dp"
android:id="@+id/fans">
<TextView
android:id="@+id/textView7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:textSize="16sp" />
<TextView
android:id="@+id/textView8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:alpha="0.8"
android:text="Fans"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="#FFFFFF" />
</LinearLayout>
<ImageView
android:id="@+id/imageView179"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginRight="10dp"
android:src="@drawable/user_profile_thin_line_separator_profile_metrics" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:orientation="vertical"
android:paddingRight="10dp"
android:elevation="10dp"
android:id="@+id/comments">
<TextView
android:id="@+id/textView9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:textSize="16sp" />
<TextView
android:id="@+id/textView12"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:alpha="0.8"
android:text="Comments"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="#FFFFFF" />
</LinearLayout>
<ImageView
android:id="@+id/imageView180"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginRight="10dp"
android:src="@drawable/user_profile_thin_line_separator_profile_metrics" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:orientation="vertical"
android:paddingRight="10dp"
android:elevation="10dp"
android:id="@+id/bookmarks">
<TextView
android:id="@+id/textView13"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:textSize="16sp" />
<TextView
android:id="@+id/textView111"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:alpha="0.8"
android:text="Bookmarks"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="#FFFFFF" />
</LinearLayout>
<ImageView
android:id="@+id/imageView181"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginRight="10dp"
android:src="@drawable/user_profile_thin_line_separator_profile_metrics" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:orientation="vertical"
android:elevation="10dp"
android:id="@+id/galleries">
<TextView
android:id="@+id/textView112"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:textSize="16sp" />
<TextView
android:id="@+id/textView113"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:alpha="0.8"
android:text="Galleries"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="#FFFFFF" />
</LinearLayout>
</LinearLayout>
<TextView
android:id="@+id/textView114"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="200dp"
android:layout_marginTop="200dp"
android:textColor="#FFFFFF" />
</RelativeLayout>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:elevation="4dp"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light">
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
</android.support.design.widget.CoordinatorLayout>
回答1:
it latest version of the design library, compile 'com.android.support:design:23.1.0', the snap has been added
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
should do it
来源：https://stackoverflow.com/questions/33563456/how-to-implement-snapping-in-collapsingtoolbarlayout