物品少时如何在CardView和CardView中使RecyclerView具有其大小

时间:2018-09-02 09:44:56

标签: android android-recyclerview android-cardview

我在RecyclerView中有一个CardView,但是我有一个问题,我在RecyclerView的底部有2个按钮,因此我将它们放在RelativeLayout的末尾,给他们parent_bottom为真,这样我就可以使它们可见,但是无论CardView是否有物品,这都使RecyclerView具有全屏显示。

Xml代码:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">

<android.support.v7.widget.CardView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="12dp"
    app:cardElevation="8dp">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/white"
        android:padding="8dp">

        <TextView
            android:id="@+id/activeInspections"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text=" Your active inspections"
            android:textSize="18sp" />

        <android.support.v7.widget.RecyclerView
            android:id="@+id/rvActiveInspections"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_above="@id/btnClear"
            android:layout_below="@+id/activeInspections"
            android:layout_marginTop="8dp" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="8dp"
            android:layout_alignParentBottom="true"
            android:layout_marginTop="8dp"
            android:id="@+id/btnClear"
            android:background="?selectableItemBackground"
            android:text="CLear" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_marginBottom="8dp"
            android:layout_marginTop="8dp"
            android:id="@+id/btnContinue"
            android:layout_alignParentBottom="true"
            android:background="?selectableItemBackground"
            android:text="Continue"
            android:textColor="@color/blue_normal" />

    </RelativeLayout>
</android.support.v7.widget.CardView>

Like this

当我尝试另一件事时,下面的代码将其设置为RecyclerView之下,因此它固定在大小写和其他情况下,如图所示(底部的按钮未显示)

那么如何解决呢?

<RelativeLayout 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.support.v7.widget.CardView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="12dp"
    app:cardElevation="8dp">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/white"
        android:padding="8dp">

        <TextView
            android:id="@+id/activeInspections"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text=" Your active inspections"
            android:textSize="18sp" />

        <android.support.v7.widget.RecyclerView
            android:id="@+id/rvActiveInspections"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/activeInspections"
            android:layout_marginTop="8dp" />

        <Button
            android:id="@+id/btnClear"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"

            android:layout_below="@+id/rvActiveInspections"
            android:layout_marginBottom="8dp"
            android:layout_marginTop="8dp"
            android:background="?selectableItemBackground"
            android:text="CLear" />

        <Button
            android:id="@+id/btnContinue"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_below="@+id/rvActiveInspections"
            android:layout_marginBottom="8dp"
            android:layout_marginTop="8dp"

            android:background="?selectableItemBackground"
            android:text="Continue"
            android:textColor="@color/blue_normal" />

    </RelativeLayout>
</android.support.v7.widget.CardView>

Buttons at the bottom not shown

目标是这个,并且当项目展开时,它仅适合屏幕,不会超出它

enter image description here

4 个答案:

答案 0 :(得分:1)

首先,您可以通过将relativelayout内的CardView更改为LinearLayout并为按钮创建嵌套的相对布局来解决。为了避免嵌套布局,请尝试下面的代码来帮助您。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">

<android.support.v7.widget.CardView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="12dp"
    app:cardElevation="8dp">

        <TextView
            android:id="@+id/activeInspections"
            android:layout_width="match_parent"
            android:layout_height="25dp"
            android:text=" Your active inspections"
            android:textSize="18sp" />

        <android.support.v7.widget.RecyclerView
            android:id="@+id/rvActiveInspections"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="60dp"
            android:layout_marginTop="25dp" />


        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="8dp"
            android:layout_marginTop="8dp"
            android:id="@+id/btnClear"
            android:layout_gravity="bottom"
            android:background="?selectableItemBackground"
            android:text="CLear" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="8dp"
            android:layout_marginTop="8dp"
            android:id="@+id/btnContinue"
            android:layout_gravity="bottom|end"
            android:background="?selectableItemBackground"
            android:text="Continue"
            android:textColor="@color/bb_darkBackgroundColor" />


</android.support.v7.widget.CardView>

</LinearLayout>
  

根据需要调整recylerview的上边距和下边距。

答案 1 :(得分:1)

只需使Recyclerview的权重= 1,这意味着父级应该是LinearLayout 请检查下面的代码

<android.support.v7.widget.CardView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="12dp"
    app:cardElevation="8dp">

    <android.support.v7.widget.LinearLayoutCompat
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"            >

        <TextView
            android:id="@+id/activeInspections"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_marginRight="8dp"
            android:text=" Your active inspections"
            android:textSize="18sp"
            />

        <android.support.v7.widget.RecyclerView
            android:id="@+id/rvActiveInspections"
            android:layout_weight="1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_marginRight="8dp"
            android:layout_marginTop="8dp"
             />

        <android.support.v7.widget.LinearLayoutCompat
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

        <Button
            android:id="@+id/btnClear"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="16dp"
            android:layout_marginLeft="8dp"
            android:layout_marginStart="8dp"
            android:background="?selectableItemBackground"
            android:text="CLear" />

        <Button
            android:id="@+id/btnContinue"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="8dp"
            android:layout_marginRight="8dp"
            android:background="?selectableItemBackground"
            android:text="Continue"
            android:textColor="@color/blue_normal" />
        </android.support.v7.widget.LinearLayoutCompat>
    </android.support.v7.widget.LinearLayoutCompat>
</android.support.v7.widget.CardView>

答案 2 :(得分:0)

尝试将RelativeLayout内的CardView内的LinearLayout更改为垂直方向。

答案 3 :(得分:0)

请使用以下代码。一切正常。

<RelativeLayout 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.support.v7.widget.CardView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="12dp"
    app:cardElevation="8dp">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@android:color/white"
        android:padding="8dp">

        <TextView
            android:id="@+id/activeInspections"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text=" Your active inspections"
            android:textSize="18sp" />

        <LinearLayout
            android:id="@+id/bottomLayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:gravity="center_horizontal"
            android:orientation="horizontal">

            <Button
                android:id="@+id/btnClear"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"

                android:layout_below="@+id/rvActiveInspections"
                android:layout_marginBottom="8dp"
                android:layout_marginTop="8dp"
                android:background="?selectableItemBackground"
                android:text="CLear" />

            <Button
                android:id="@+id/btnContinue"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentRight="true"
                android:layout_below="@+id/rvActiveInspections"
                android:layout_marginBottom="8dp"
                android:layout_marginTop="8dp"
                android:textColor="@color/blue_normal"
                android:background="?selectableItemBackground"
                android:text="Continue" />
        </LinearLayout>

        <android.support.v7.widget.RecyclerView
            android:id="@+id/rvActiveInspections"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_above="@+id/bottomLayout"
            android:layout_below="@+id/activeInspections"
            android:layout_marginTop="8dp" />

    </RelativeLayout>
</android.support.v7.widget.CardView>