替代嵌套的权重与LinearLayouts [英] Alternative to nested weights with LinearLayouts

问题描述

我要实现以下目标：

这适用于以下布局：

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

    <LinearLayout
        android:layout_weight="3"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:orientation="vertical" >

        <fragment 
            android:name="com.bobjohn.DetailsMenuFragment"
            android:id="@+id/detailsMenuFragment"
            android:layout_width="fill_parent"
            android:layout_height="0dp"
            android:layout_weight="6"
            />

        <fragment 
            android:name="com.bobjohn.SummaryFragment"
            android:id="@+id/summaryFragment"
            android:layout_width="fill_parent"
            android:layout_height="0dp"
            android:layout_margin="10dp"
            android:layout_weight="4"/>
    </LinearLayout>

    <TextView 
        android:layout_width="0dp"
        android:layout_weight="7"
        android:layout_height="fill_parent"
        android:text="Test Text"/>
</LinearLayout>

不过，我得到有关嵌套的权重是不好的业绩预警。我理解的错误，但我不知道该如何前preSS以另一种方式此布局。什么是另类？

However, I get the warning about nested weights being bad for performance. I understand the error but I don't know how to express this layout in another way. What is the alternative?

推荐答案

是的，我们有替代嵌套的的LinearLayout 重量通过Android的％的支持库

Yes we have the alternative for nested LinearLayout weight by android's percent support library

code和概念HERE ！

GitHub的项目的位置！

考虑一个简单的布局，我已经完全避免的LinearLayout

Consider this simple layout where I have totally avoided weight property of LinearLayout

<android.support.percent.PercentRelativeLayout
    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">
    <TextView
        android:id="@+id/fifty_huntv"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#ff7acfff"
        android:text="20% - 50%"
        android:textColor="@android:color/white"
        app:layout_heightPercent="20%"
        app:layout_widthPercent="50%" />
    <TextView
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_toRightOf="@id/fifty_huntv"
        android:background="#ffff5566"
        android:text="80%-50%"
        app:layout_heightPercent="80%"
        app:layout_widthPercent="50%"
        />

</android.support.percent.PercentRelativeLayout>

真真棒！

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