在不使用layout_weight的情况下,使两个LinearLayout占据屏幕的50%

Question

我目前正在做横向屏幕的特殊xml布局,其中存在4个图像,2个LinearLayouts彼此相邻,每个图像有2个图像.这些LinearLayouts我打电话linearLayout1和linearLayout2.

linearLayout1 标有蓝色矩形:

linearLayout2 标有蓝色矩形:

如您所见,第一个使用约80%的屏幕,而第二个使用剩下的.我当然不想要这个,我想要50%.我无法使用,layout_weight因为它已经在LinearLayouts本身使用(两个图像的定位),嵌套的权重对性能不利.

我尝试了很多不同的变体,但我无法让两个LinearLayouts分别拥有50%的屏幕.这是代码:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/db1_root"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >

<LinearLayout
    android:id="@+id/title_container"
    style="@style/TitleBar" >

    <ImageView
        style="@style/TitleBarLogo"
        android:contentDescription="@string/imgViewDesc"
        android:src="@drawable/title_logo" />

    <ImageView
        style="@style/TitleBarSeparator"
        android:contentDescription="@string/imgViewDesc" />

    <TextView style="@style/TitleBarText" />

    <ImageButton
        style="@style/TitleBarAction"
        android:contentDescription="@string/imgViewDesc"
        android:onClick="onClickAbout"
        android:src="@drawable/title_about" />
</LinearLayout>

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/title_container"
    android:layout_above="@+id/mobFoxView" >

    <!-- LEFT COLUMN -->

    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_above="@+id/mobFoxView"
        android:layout_alignParentLeft="true"
        android:layout_toLeftOf="@+id/linearLayout2"
        android:background="@color/white"
        android:gravity="center"
        android:orientation="vertical"
        android:weightSum="2" >

        <ImageView
            android:id="@+id/imgNews"
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:contentDescription="@string/imgViewDesc"
            android:onClick="onClickFeature"
            android:src="@drawable/front_news_1" />

        <ImageView
            android:id="@+id/imgReleases"
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:contentDescription="@string/imgViewDesc"
            android:onClick="onClickFeature"
            android:src="@drawable/front_releases_1" />
    </LinearLayout>

    <!-- RIGHT COLUMN -->

    <LinearLayout
        android:id="@+id/linearLayout2"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:layout_above="@+id/mobFoxView"
        android:layout_alignParentRight="true"
        android:layout_alignTop="@id/linearLayout1"
        android:background="@color/white"
        android:gravity="center"
        android:orientation="vertical"
        android:weightSum="2" >

        <ImageView
            android:id="@+id/imgArtists"
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:contentDescription="@string/imgViewDesc"
            android:onClick="onClickFeature"
            android:src="@drawable/front_artists_1" />

        <ImageView
            android:id="@+id/imgLabels"
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:contentDescription="@string/imgViewDesc"
            android:onClick="onClickFeature"
            android:src="@drawable/front_labels_1" />
    </LinearLayout>
</RelativeLayout>

<com.mobfox.sdk.MobFoxView
    android:id="@+id/mobFoxView"
    android:layout_width="fill_parent"
    android:layout_height="50dp"
    android:layout_alignParentBottom="true"
    mode="test"
    publisherId="@string/mobFoxID" />

</RelativeLayout>

Answer 1

好吧,我看到有两种选择.

1. 拧紧LINT警告并使用嵌套的重量.电话很快,它会产生毫秒的差异,因为你只需要一次(大部分时间)给布局充气.嵌套布局仅对性能有害,因为充气机需要进行更多传递来测量布局.

2. LinearLayout用a 交换你的顶部,RelativeLayout并将两个孩子对准View中心隐形,如下所示:

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/top"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
      android:id="@+id/center_point"
      android:layout_width="0dp"
      android:layout_height="0dp"
      android:layout_centerInParent="true"/>

    <LinearLayout
      android:id="@+id/left_layout"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:layout_alignParentLeft="true"
      android:layout_alignRight="@+id/center_point">
    </LinearLayout>


    <LinearLayout
      android:id="@+id/right_layout"
      android:orientation="horizontal" //default
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:layout_alignParentRight="true"
      android:layout_alignLeft="@+id/center_point">
    </LinearLayout>

</RelativeLayout>

Answer 2

您可以为布局设置“ Weight”，如下所示：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent" >
    <LinearLayout android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1">
    </LinearLayout>
    <LinearLayout android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1">
    </LinearLayout>

因此，每个线性输出占据屏幕的50％。:)