What is the difference between the two forms XML?

I want to add the second Activity and there are two formats. Are they both right?

我想添加第二个Activity,有两种格式。他们都是对的吗?

 <application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <activity
        android:name=".SecondActivity"
        android:label="@string/app_name">  

</application>

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <activity android:name=".SecondActivity" >

    </activity>  

</application>

I am not sure what kind of format is ok and how many formats does it have to add an activity.

我不确定什么样的格式是好的,它有多少格式来添加活动。

1 个解决方案

#1

Both format is identical (if I except the label). In the first you declare a new xml node with no children so it's closed directly at the end (don't forget /) like this :

两种格式都相同(如果我除了标签)。在第一个你声明一个没有子节点的新xml节点,所以它最后直接关闭(不要忘记/)像这样:

<activity
        android:name=".SecondActivity"
        android:label="@string/app_name"/>

You could compare this with the img tag in html <img src=""/>

您可以将其与html What is the difference between the two forms XML? 中的img标记进行比较

#1