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[英]How to hide FloatingActionMenu inside CoordinatorLayout on Scroll?
[英]How to hide LinearLayout inside CoordinatorLayout on scroll?
我怎樣才能讓這個 LinearLayout 滾動? 我希望 LinearLayout 中的這些文本視圖在 RecyclerView 上方並在滾動時隱藏。 我讀過我將通過添加以下app:layout_behavior="@string/appbar_scrolling_view_behavior"
來獲得它app:layout_behavior="@string/appbar_scrolling_view_behavior"
但它不起作用。
XML:
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.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:background="@drawable/gradientbackground"
android:screenOrientation="portrait" >
<androidx.recyclerview.widget.RecyclerView
android:layout_marginTop="100dp"
android:id="@+id/recyclerview"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<LinearLayout
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="text2" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="text2" />
</LinearLayout>
</androidx.core.widget.NestedScrollView>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="@+id/nav_view"
android:layout_width="match_parent"
android:layout_height="60dp"
android:background="@drawable/bottom_navigation_background"
android:elevation="0dp"
android:outlineProvider="none"
app:itemIconTint="@color/bottom_navigation_colors"
app:labelVisibilityMode="selected"
app:layout_anchor="@+id/recyclerview"
app:layout_anchorGravity="bottom|center"
app:layout_behavior="@string/hide_bottom_view_on_scroll_behavior"
app:layout_scrollFlags="scroll|enterAlways"
app:menu="@menu/bottom_nav_menu" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
您可以嘗試設置坐標參考並在滾動經過或經過該特定參考點時隱藏 LinearLayout。
您可以使用它作為參考來獲取視圖的 Y 坐標:
private View mIamYourView;
mIamYourView.getY(); // You can opt this as int, since it's what's going to be needed, I think this returns a double or a float.
現在您可以使用 Scrollview 的 Y 坐標,看看它是否已經過去或已經看到您的參考點,如下所示:
private ScrollView mYourScrollView;
if(mScrollView.getScrollY() >= mIamYourView.getY()){
mIamYourview.setVisiblity(VIEW.GONE);
}
請在 NestedScrollView 中嘗試您的 RecyclerView
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.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:background="@drawable/gradientbackground"
android:screenOrientation="portrait" >
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<androidx.recyclerview.widget.RecyclerView
android:layout_marginTop="100dp"
android:id="@+id/recyclerview"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<LinearLayout
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="text2" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="text2" />
</LinearLayout>
</androidx.core.widget.NestedScrollView>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="@+id/nav_view"
android:layout_width="match_parent"
android:layout_height="60dp"
android:background="@drawable/bottom_navigation_background"
android:elevation="0dp"
android:outlineProvider="none"
app:itemIconTint="@color/bottom_navigation_colors"
app:labelVisibilityMode="selected"
app:layout_anchor="@+id/recyclerview"
app:layout_anchorGravity="bottom|center"
app:layout_behavior="@string/hide_bottom_view_on_scroll_behavior"
app:layout_scrollFlags="scroll|enterAlways"
app:menu="@menu/bottom_nav_menu" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
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