What is the difference between the two forms XML?

Question

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

 <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.

Answer 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 :

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

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