匹配父母的父母?

时间:2019-01-16 15:38:17

标签: android android-layout

我有一个AppBarLayout(高度设置为wrap_content),里面有一个Toolbar和一个工具栏形状的按钮(由CoordinatorLayout制造)。单击按钮后,我要使其为gone并进行其他显示(RecyclerViewvisible,该视图将占据整个屏幕({ {1}},它是match_parent的父级。当我将CoordinatorLayout设为AppBarLayout时,视图不会占据整个屏幕,只是占据了整个屏幕的一半。

对于其父级设置为visible的视图,是否有“匹配父级的父级”尺寸常量?

在单击按钮之前: Before clicking the button

单击按钮后: After clicking the button

代码:

match_parent

PS::有人请更改图像的链接,我没有足够的声誉。

PS 2:我知道一种实现此目的的方法是以编程方式将wrap_content的高度设置为<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:orientation="vertical" tools:context=".PedidosActivity"> <!-- Screen content below toolbar --> . . . <!-- End of screen content --> <android.support.design.widget.AppBarLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"> <android.support.v7.widget.Toolbar android:layout_width="match_parent" android:layout_height="?attr/actionBarSize" android:id="@+id/toolbarPedidos" android:background="@color/colorPrimary" app:popupTheme="@style/ThemeOverlay.AppCompat.Light" app:layout_scrollFlags="scroll|enterAlways|snap" /> <android.support.constraint.ConstraintLayout android:layout_width="match_parent" android:layout_height="?attr/actionBarSize" android:id="@+id/btnLineaLayout" android:visibility="gone" app:layout_scrollFlags="scroll|enterAlways|snap" android:background="@color/colorPrimary" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent"> <Button android:id="@+id/btnLinea" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@android:color/transparent" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent"/> <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/linea" android:textColor="@android:color/white" android:textSize="18sp" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintHorizontal_chainStyle="packed" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent"/> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginStart="8dp" android:src="@drawable/baseline_keyboard_arrow_down_24" android:tint="@android:color/white" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintHorizontal_bias="0.0" app:layout_constraintStart_toEndOf="@id/textView2" app:layout_constraintTop_toTopOf="parent"/> </android.support.constraint.ConstraintLayout> <android.support.v7.widget.RecyclerView android:layout_width="match_parent" android:layout_height="match_parent" app:layout_scrollFlags="scroll|enterAlways|snap" android:background="@color/colorPrimary" android:visibility="visible" /> </android.support.design.widget.AppBarLayout> </android.support.design.widget.CoordinatorLayout> ,但似乎“肮脏”而不优雅。

1 个答案:

答案 0 :(得分:0)

我在您的代码中找不到RelativeLayout。但是当您这样做时,RelativeLayout应该会覆盖整个屏幕

<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:orientation="vertical"
    tools:context=".PedidosActivity">

    <RelativeLayout android:layout_width="match_parent" 
                android:layout_height="match_parent"
                android:background="@color/colorAccent">
    </RelativeLayout>

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