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This is my MainActivity layout: activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<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: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.custom.app002.MainActivity"
android:orientation="vertical">
<!--情况1:使用weight,View2的layout_width="wrap_context"-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginBottom="10dp">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="@color/red"
android:text="Hello World!"
android:textColor="@color/white"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@color/blue"
android:text="Hello World!"
android:textColor="@color/white"/>
</LinearLayout>
<!--情况2:使用weight,View2的layout_width="match_parent"-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginBottom="10dp">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="@color/red"
android:text="Hello World!"
android:textColor="@color/white"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/blue"
android:text="Hello World!"
android:textColor="@color/white"/>
</LinearLayout>
<!--情况3:使用weight,View的layout_width="match_parent"-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginBottom="10dp">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/red"
android:text="Hello World!"
android:textColor="@color/white"/>
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="@color/blue"
android:text="Hello World!"
android:textColor="@color/white"/>
</LinearLayout>
<!--情况4:使用weight,所有子视图的layout_weight="1"-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginBottom="10dp">
<TextView
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:background="@color/red"
android:text="Hello World!"
android:textColor="@color/white"/>
<TextView
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:background="@color/blue"
android:text="Hello World!"
android:textColor="@color/white"/>
</LinearLayout>
<!--情况5:使用weight,View1的weight=“2”,View2的weight=“1”-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginBottom="10dp">
<TextView
android:layout_width="0dp"
android:layout_weight="2"
android:layout_height="wrap_content"
android:background="@color/red"
android:text="Hello World!"
android:textColor="@color/white"/>
<TextView
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:background="@color/blue"
android:text="Hello World!"
android:textColor="@color/white"/>
</LinearLayout>
</LinearLayout>
下面是效果图