Integrating multiple activity in android

I have a login activity and besides that,I have different activity like sharebuttonadapter,Socialauth Dialog,SocialauthError which are part of socialauthcode for logging through Facebook and twitter.But when I run the application I can see only the login page and not the different option through which I can login.

Please advise.

Mainfest File:-

package="com.example.abhisheksharma1.bridgeapps" >

To retrieve the account name (email) as part of sign-in: -->

auto-complete the email text field in the login form with the user's emails

-->

android:allowBackup="true"

android:icon="@mipmap/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

android:name=".LoginActivity"

android:label="@string/app_name"

android:windowSoftInputMode="adjustResize|stateHidden" >

android:name="com.google.android.gms.version"

android:value="@integer/google_play_services_version" />

android:name=".DialogListener"

android:label="@string/title_activity_dialog_listener" >

android:name=".PopUpListAdapter"

android:label="@string/title_activity_pop_up_list_adapter" >

android:name=".SocialAuthDialog"

android:label="@string/title_activity_social_auth_dialog" >

android:name=".SocialAuthError"

android:label="@string/title_activity_social_auth_error" >

android:name=".SocialAuthListener"

android:label="@string/title_activity_social_auth_listener" >

android:name=".Util"

android:label="@string/title_activity_util" >

android:name=".SocialButtonAdapter"

android:label="@string/title_activity_social_button_adapter" >

android:name=".SocialAuthAdapter"

android:label="@string/title_activity_social_auth_adapter" >``

android:name=".ShareButtonAdapter"

android:label="@string/title_activity_share_button_adapter" >

via Chebli Mohamed