Android 安卓布局不起作用

我正在尝试设置android:layout\u weight=“1”，但它没有任何作用

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent"
    android:background="#fbd0d5"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.example.raza.helloworld.MainActivity"
    tools:showIn="@layout/activity_main"
    android:weightSum="1">


    <TextView

        android:id="@+id/textView1"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="#fef65b"
        android:text="Minnions"
        android:textColor="#f44242"
        android:textSize="60sp"
        android:textStyle="bold" />

    <TextView

        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="#fef65b"
        android:text="Happy"
        android:textColor="#f44242"
        android:textSize="60sp"
        android:textStyle="bold" />

    <TextView

        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="#fef65b"
        android:text="Birthday"
        android:textColor="#f44242"
        android:textSize="60sp"
        android:textStyle="bold" />
</LinearLayout>

---

此代码有什么问题？

将父线性布局中的权重和更改为3

android:weightSum="3"

---

只需删除

weigtsum

和

showIn

<?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:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent"
    android:background="#fbd0d5"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">


    <TextView

        android:id="@+id/textView1"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="#fef65b"
        android:text="Minnions"
        android:textColor="#f44242"
        android:textSize="60sp"
        android:textStyle="bold" />

    <TextView

        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="#fef65b"
        android:text="Happy"
        android:textColor="#f44242"
        android:textSize="60sp"
        android:textStyle="bold" />

    <TextView

        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="#fef65b"
        android:text="Birthday"
        android:textColor="#f44242"
        android:textSize="60sp"
        android:textStyle="bold" />
</LinearLayout>

从根布局中删除android:weightSum=“1”

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent"
    android:background="#fbd0d5"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    >


    <TextView

        android:id="@+id/textView1"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="#fef65b"
        android:text="Minnions"
        android:textColor="#f44242"
        android:textSize="60sp"
        android:textStyle="bold" />

    <TextView

        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="#fef65b"
        android:text="Happy"
        android:textColor="#f44242"
        android:textSize="60sp"
        android:textStyle="bold" />

    <TextView

        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="#fef65b"
        android:text="Birthday"
        android:textColor="#f44242"
        android:textSize="60sp"
        android:textStyle="bold" />
</LinearLayout>

---

您需要将线性布局的权重和更改为等于3

android:weightSum="3"

提供了有关权重和的更多细节，但其要点是：

---

子元素

layout\u weight

应等于父元素的

weight\u sum

所有视图都具有相同的权重！。因此，它们的高度都不会更改。将weightSum更改为等于其子视图的权重之和，并为子视图设置不同的权重。到时候会变的

像这样

<LinearLayout 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:background="#fbd0d5"
android:orientation="vertical"
android:weightSum="10"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<TextView
    android:id="@+id/textView1"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="4"
    android:background="#fef65b"
    android:text="Minnions"
    android:textColor="#f44242"
    android:textSize="60sp"
    android:textStyle="bold" />

<TextView
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="3"
    android:background="#fef65b"
    android:text="Happy"
    android:textColor="#f44242"
    android:textSize="60sp"
    android:textStyle="bold" />

<TextView
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="3"
    android:background="#fef65b"
    android:text="Birthday"
    android:textColor="#f44242"
    android:textSize="60sp"
    android:textStyle="bold" />
</LinearLayout>

aw sum感谢您的帮助我正在学习android开发it帮助当我从根布局中删除android:weightSum=“1”时它会工作在您的线性布局（根视图）中替换android:weightSum=“3”

<?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:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical">


<TextView
    android:id="@+id/textView1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="10dp"
    android:layout_weight="1"
    android:background="#fef65b"
    android:gravity="center"
    android:text="Hai"
    android:textColor="#f44242"
    android:textSize="60sp"
    android:textStyle="bold" />

<TextView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="10dp"
    android:layout_weight="1"
    android:background="#fef65b"
    android:gravity="center"
    android:text="Hello"
    android:textColor="#f44242"
    android:textSize="60sp"
    android:textStyle="bold" />

<TextView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="10dp"
    android:layout_weight="1"
    android:background="#fef65b"
    android:gravity="center"
    android:text="How r u"
    android:textColor="#f44242"
    android:textSize="60sp"
    android:textStyle="bold" />
</LinearLayout>