嵌套的LinearLayout仅显示第一个视图 [英] Nested LinearLayout shows only the first View

问题描述

我看过一些问题，可能与此类似.但是，这些情况有所不同，有些不适用于初学者.
所以我最近才刚开始使用Android.请理解，我是*.xml的新手.无论如何，我担心的是嵌套的LinearLayout仅显示第一个View.

I have seen some question the can be similar to this. However, those scenario were different and some are not for beginners.
So I just started Android recently. Please understand that I'm new to *.xml. Anyway, my concern is regarding the nested LinearLayout that only shows the first View.

<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="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <LinearLayout 
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:orientation="horizontal">

        <TextView
            android:layout_gravity="center"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:layout_width="0dp"
            android:textSize="20sp"
            android:text="@string/app_title">
        </TextView>

    </LinearLayout>

    <LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:orientation="horizontal">

        <Button 
            android:layout_gravity="center"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:text="@string/button_ok"
            android:onClick="changeMessage">
        </Button>

        <TextView
            android:layout_gravity="center"
            android:textSize="20sp"
            android:id="@+id/this_text"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:text="@string/sample_text">
        </TextView>

    </LinearLayout>

</LinearLayout>

这是到目前为止的XML.使用此代码，仅显示第一个TextView.

Here's the XML so far. With this code, only the first TextView is only showing.

推荐答案

android:layout_height="match_parent"嵌套LinearLayout的高度应为wrap_content而不是match_parent

android:layout_height="match_parent" the height of the nested LinearLayout should be wrap_content instead of match_parent

这篇关于嵌套的LinearLayout仅显示第一个视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！