The receiver definition in AndroidManifest.xml for your app

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 ...>
    <application ...>
        <acivity ... />

        <!-- Android Market install receiver -->
        <receiver
            android:exported="true"
            android:name="com.your.namespace.InstallReferrerReceiver" >
            <intent-filter >
                <action android:name="com.android.vending.INSTALL_REFERRER" />
            </intent-filter>
        </receiver>
    </application>
</manifest>