我对
CoordinatorLayout还不太了解，我在CoordinatorLayout中遇到了一个非常奇怪的问题。我有一个ImageView(或者更确切的说是CircleImageView子类的ImageView，这个CircleImageView(它将个人资料图片放在中心))作为CoordinatorLayout的一个子节点。我将这个CircleImageView锚定在另一个CoordinatorLayout的子节点AppbarLayout上。这是我的整个布局：
到目前为止还好。我现在可以滚动AppbarLayout并且NestedScrollView也跟着移动。但是，我想要在向上滚动时通过自定义CoordinatorLayour.Behavior让个人资料图片向右移动，于是我尝试使用自定义行为来对CircleImageView进行一些平移。目前并不完整，只能大概地平移视图，但是结果是随着自定义行为的引入，CircleImageView已经完全消失了。
这可能是什么原因呢？
注意：我已经尝试将CircleImageView替换为ImageView，但是效果仍然相同。
下面是参考布局：
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="false">
<android.support.design.widget.AppBarLayout
android:id="@+id/main.appbar"
android:layout_width="match_parent"
android:layout_height="200dp"
android:fitsSystemWindows="false"
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|exitUntilCollapsed">
<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_collapseMode="pin"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light">
</android.support.v7.widget.Toolbar>
<android.support.v7.widget.AppCompatImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_marginBottom="24dp"
android:layout_marginEnd="24dp"
android:layout_marginRight="24dp"
android:layout_weight="1"
android:tint="@color/white"
app:srcCompat="@drawable/ic_settings_24px" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/profile_pic"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:elevation="4dp"
app:layout_behavior="com.learncity.learner.account.profile.ProfilePicBehavior"
android:src="@drawable/avatar_boy_2"
app:layout_anchor="@id/main.appbar"
app:layout_anchorGravity="bottom|center" />
<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.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/user_name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="64dp"
android:lineSpacingExtra="8dp"
android:padding="@dimen/activity_horizontal_margin"
android:text="@string/account_person_name_label"
android:textAlignment="center"
android:textSize="40sp"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<android.support.v7.widget.AppCompatImageView
android:id="@+id/id_phone_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="24dp"
android:layout_marginStart="24dp"
android:layout_marginTop="8dp"
android:tint="@color/colorPrimary"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/user_name"
app:srcCompat="@drawable/ic_phone_black_24dp" />
<TextView
android:id="@+id/id_phone_no"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:text="Phone No"
app:layout_constraintBottom_toBottomOf="@+id/id_phone_icon"
app:layout_constraintLeft_toRightOf="@+id/id_phone_icon"
app:layout_constraintTop_toTopOf="@+id/id_phone_icon"
app:layout_constraintVertical_bias="0.571" />
<android.support.v7.widget.AppCompatImageView
android:id="@+id/id_email_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="24dp"
android:layout_marginStart="24dp"
android:layout_marginTop="8dp"
android:tint="@color/colorPrimary"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/id_phone_icon"
app:srcCompat="@drawable/ic_email_black_24dp" />
<TextView
android:id="@+id/id_email_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:text="Email Id"
app:layout_constraintBottom_toBottomOf="@+id/id_email_icon"
app:layout_constraintLeft_toRightOf="@+id/id_email_icon"
app:layout_constraintTop_toTopOf="@+id/id_email_icon" />
<View
style="@style/Divider"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintTop_toBottomOf="@+id/id_email_icon" />
</android.support.constraint.ConstraintLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
还有自定义行为：（我知道计算可能不准确，但我想尝试一个初步的粗略动画）
public class ProfilePicBehavior extends CoordinatorLayout.Behavior<CircleImageView>{
public ProfilePicBehavior(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public boolean layoutDependsOn(CoordinatorLayout parent, CircleImageView child, View dependency) {
return dependency instanceof AppBarLayout;
}
@Override
public boolean onDependentViewChanged(CoordinatorLayout parent, CircleImageView child, View dependency) {
// Translate the CircleImageView to the right
// Calculate first, what fraction the AppBarLayout has shrunk by
float proportion = dependency.getHeight() / 200f;
// Translate the child by this proportion
float translationX = parent.getWidth() * proportion;
child.setTranslationX(translationX);
return true;
}
}
ProfilePicBehavior？ - azizbekian