Unable to find Default Activity Class Name
<p>I am working the process of linking facebook login to my android application. In some tutorial I was asked to register my app with Facebook Developers website where I did everything but I couldnt find "Default Activity Class Name" in my Android Studio I have provided this below manifest file </p>

<pre><code>    &lt;?xml version="1.0" encoding="utf-8"?&gt;
    &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="in.evago.evago"&gt;

    &lt;uses-permission android:name="android.permission.INTERNET" /&gt;

    &lt;application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"&gt;
        &lt;meta-data
            android:name="com.facebook.sdk.ApplicationId"
            android:value="@string/facebook_app_id" /&gt;

        &lt;!-- Front Page --&gt;
        &lt;activity
            android:name=".Frontpage"
            android:label="@string/app_name"
            android:theme="@style/AppTheme.NoActionBar"&gt;
            &lt;intent-filter&gt;
                &lt;action android:name="android.intent.action.MAIN" /&gt;
                &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
            &lt;/intent-filter&gt;

            &lt;meta-data
                android:name="android.app.searchable"
                android:resource="@xml/searchable" /&gt;
        &lt;/activity&gt;
        &lt;!-- Search results activity --&gt;


&lt;activity
        android:name=".SearchResultsActivity"
        android:label="@string/title_activity_searchable"
        android:launchMode="singleTop"
        android:theme="@style/AppTheme.NoActionBar"&gt;
        &lt;intent-filter&gt;
            &lt;action android:name="android.intent.action.SEARCH" /&gt;
        &lt;/intent-filter&gt;
    &lt;/activity&gt;
    &lt;!-- Search results activity Ends --&gt;

&lt;/application&gt;
</code></pre>

<p>Please help me in locating the "Default Activity Class Name"</p>