下面是我的协调员布局的代码。它运作良好。
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
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="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="#f4f4f4"
app:expandedTitleMarginEnd="16dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/header"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/echo3"
android:fitsSystemWindows="true"
android:scaleType="centerCrop" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_alignParentBottom="true"
android:background="#fff">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Private Albums"
android:textColor="#000"
android:textSize="22sp"
android:textStyle="bold" />
</RelativeLayout>
</RelativeLayout>
<android.support.v7.widget.Toolbar
android:id="@+id/anim_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="@+id/anim_toolbar"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<include layout="@layout/content_profile" />
<!--<fragment-->
<!--android:id="@+id/detail"-->
<!--android:name="<package>.<fragment_name>"-->
<!--android:layout_width="match_parent"-->
<!--android:layout_height="match_parent" />-->
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
但我想淡化整个相对布局,因为我向上滚动它应该开始褪色(平均整个折叠栏布局)。它确实在特定点淡出,但我希望它在我向上滚动时淡出。谢谢,任何帮助表示赞赏。
通过将AppBarLayout.OnOffsetChangedListener连接到AppBarLayout,可以在向上滚动时减少RelativeLayout的alpha值。以下是我在我的应用中使用的代码。
appBar = (AppBarLayout) findViewById(R.id.app_bar_layout);
appBar.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
@Override
public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
relativeLayoutToFadeOut.setAlpha(1.0f - Math.abs(verticalOffset / (float)
appBarLayout.getTotalScrollRange()));
}
});
请参考下面的代码,对我来说工作正常..
<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:id="@+id/view_profile_parent_layout"
android:background="@color/splash_bg_color"
tools:context=".Activity">
<android.support.design.widget.AppBarLayout
android:id="@+id/app_barLayout"
android:layout_width="match_parent"
android:layout_height="@dimen/view_profile_profile_app_bar_height"
android:elevation="@dimen/view_profile_app_bar_elevation"
android:theme="@style/ThemeOverlay.AppCompat.Light">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_bar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:contentScrim="?attr/colorPrimary"
app:titleEnabled="false"
android:fitsSystemWindows="true"
app:layout_scrollFlags="exitUntilCollapsed|scroll"
app:title="Collapsing Toolbar">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="?attr/actionBarSize">
<de.hdodenhof.circleimageview.CircleImageView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/view_profile_imageView"
android:layout_width="@dimen/view_profile_profile_width"
android:layout_height="@dimen/view_profile_profile_height"
android:src="@drawable/ic_profile_icon"
android:layout_centerHorizontal="true"
app:civ_border_width="@dimen/view_profile_profile_border_width"
app:civ_border_color="@color/textPrimary"/>
<TextView
android:id="@+id/view_profile_profile_name_textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/view_profile_profile_name_margin_top"
android:layout_below="@id/view_profile_imageView"
android:fontFamily="@font/roboto_regular"
android:text=""
android:textSize="@dimen/view_profile_profile_name_text_size"
android:gravity="center"
android:textColor="@color/white"/>
</RelativeLayout>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
app:layout_collapseMode="pin"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:elevation="@dimen/login_btn_elevation"
app:popupTheme="@style/AppTheme.PopupOverlay"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
android:contentInsetStart="0dp"
android:contentInsetLeft="0dp">
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>