Question

我多次尝试绘制2个相对布局水平对齐并分成半屏幕。

enter image description here

我用油漆设计图像，以便更好地解释我的意思。

有什么建议吗？

Answer 1

在不需要使用LinearLayout的情况下完成相同任务的另一种方法是在父布局的中间放置一个居中对齐的“垫片”，然后将其他元素对齐。如果你将半角元素的宽度设置为match_parent，但是同时对齐它们的左侧和右侧，它们最终会缩小以适应。

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.EqualWidthExample" >

    <!-- An invisible view aligned to the center of the parent. Allows other
    views to be arranged on either side -->
    <View 
        android:id="@+id/centerShim"
        android:layout_height="match_parent"
        android:layout_width="0dp"
        android:visibility="invisible"
        android:layout_centerHorizontal="true"/>

    <!--Set width to match_parent sets maximum width. alignParentLeft aligns 
    the left edge of this view with the left edge of its parent. toLeftOf 
    sets the right edge of this view to align with the left edge of the 
    given view. The result of all three settings is that this view will 
    always take up exactly half of the width of its parent, however wide 
    that may be. -->
    <Button
        android:id="@+id/btLeft"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_toLeftOf="@+id/centerShim"
        android:text="Left Button" />

    <!--Same deal, but on the right -->
    <Button
        android:id="@+id/btRight"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_toRightOf="@+id/centerShim"
        android:layout_below="@+id/tvLeft"
        android:text="Right Button" />
</RelativeLayout>

Answer 2

您可以将这两个RelativeLayouts放在一个水平方向的LinearLayout中，然后将weight用于RelativeLayouts。这会将LinearLayout分成2个相等的部分。

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:baselineAligned="false">
    <RelativeLayout
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1">
   </RelativeLayout>
   <RelativeLayout
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1">
   </RelativeLayout>
</LinearLayout>

Answer 3

现在您可以使用PercentRelativeLayout

轻松完成

<android.support.percent.PercentRelativeLayout
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:padding="16dp"
tools:context=".MainActivity">


<Button
    android:id="@+id/button"
    android:layout_height="wrap_content"
    android:layout_centerVertical="true"
    android:text="Button"
    app:layout_widthPercent="50%"/>

<Button
    android:id="@+id/button2"
    android:layout_height="wrap_content"
    android:layout_centerVertical="true"
    android:layout_toRightOf="@id/button"
    android:text="Button 2"
    app:layout_widthPercent="50%"/>
</android.support.percent.PercentRelativeLayout>

不要忘记添加gradle依赖

dependencies {
     compile 'com.android.support:percent:25.3.1'
}

code in github

<强>更新

PercentRelativeLayout is Deprecated since API level 26.0.0

Answer 4

您可以使用具有嵌套wieghts的非推荐结构

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:baselineAligned="false"
    android:weightSum="5">
    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:layout_gravity="center">
        <TextView
            android:id="@+id/TopTextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:text="Top Text View"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="5dp"/>

    </RelativeLayout>
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="horizontal"
        android:weightSum="2"
        android:layout_weight="4">

        <RelativeLayout
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:paddingLeft="@dimen/activity_horizontal_margin"
            android:paddingRight="@dimen/activity_horizontal_margin"
            android:paddingTop="@dimen/activity_vertical_margin"
            android:paddingBottom="@dimen/activity_vertical_margin">
            <TextView
                android:id="@+id/LeftTextView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceLarge"
                android:text="Left Text View"
                android:layout_centerHorizontal="true"
                android:layout_marginTop="30dp"/>

        </RelativeLayout>
        <RelativeLayout
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:paddingLeft="@dimen/activity_horizontal_margin"
            android:paddingRight="@dimen/activity_horizontal_margin"
            android:paddingTop="@dimen/activity_vertical_margin"
            android:paddingBottom="@dimen/activity_vertical_margin">
                <TextView
                    android:id="@+id/RightTextView"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textAppearance="?android:attr/textAppearanceLarge"
                    android:text="Right Text View"
                    android:layout_centerHorizontal="true"
                    android:layout_marginTop="30dp"/>
        </RelativeLayout>
    </LinearLayout>
</LinearLayout>

Answer 5

我在你的图纸中看到4个相对布局......？

如果你的意思是中间的两个将它们放入一个LinearLayout（水平方向），让它们都具有match_parent的宽度，并给予两个相对布局权重1

Android：2相对布局分为半屏

5 个答案: