The "intent-filter" in "AndroidManifest.xml" allows you to set the initial activity (default activity) of your Android application.
To set an activity class named "logoActivity" as the default activity, see the following line of code.
File : AndroidManifest.xml
<activity
android:label="Logo"
android:name=".logoActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>