fill_parent设置一个顶部布局或控件强制性让它布满整个屏幕。(这是不管内容大小,直接适应整个屏幕的大小,例长度设置了这,就只有长度适应屏幕的长度)

wrap_content布局指根据视图内部内容自动扩展以适应其大小。(简单来说根据里面的图片或文字等内容的大小去适应,例如按钮内容就button cjp两个英文字这么大,所以按钮长和宽就适应这两个英文字大小。)

1. wrap_content

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

<Button
        android:id="@+id/btnButton1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button CJP"/>

< /RelativeLayout>

Android fill_parent和wrap_content分析-LMLPHP

2. fill_parent – width

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

<Button
        android:id="@+id/btnButton1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Button CJP"/>

< /RelativeLayout>

Android fill_parent和wrap_content分析-LMLPHP

3. fill_parent – height

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

<Button
        android:id="@+id/btnButton1"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:text="Button CJP"/>

< /RelativeLayout>

Android fill_parent和wrap_content分析-LMLPHP

4. fill_parent – width, height

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

<Button
        android:id="@+id/btnButton1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:text="Button CJP"/>

< /RelativeLayout>

Android fill_parent和wrap_content分析-LMLPHP

 
 
05-11 20:11