AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.steps"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="21" />

    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".activities.MainActivity"
            android:screenOrientation="portrait" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".activities.LoginActivity"
            android:screenOrientation="portrait"
            android:theme="@style/noActionBar" >
        </activity>
        <activity
            android:name=".activities.GroupsActivity"
            android:label="@string/title_activity_groups"
            android:screenOrientation="portrait" >
        </activity>
        <activity
            android:name=".activities.SignUpActivity"
            android:screenOrientation="portrait"
            android:theme="@style/noActionBar" >
        </activity>
        <activity
            android:name=".activities.AddGroupActivity"
            android:label="@string/title_activity_add_group"
            android:parentActivityName=".activities.GroupsActivity"
            android:screenOrientation="portrait" >
        </activity>
        <activity
            android:name=".activities.GroupActivity"
            android:launchMode="singleTop"
            android:parentActivityName=".activities.GroupsActivity"
            android:screenOrientation="portrait" >
        </activity>
        <activity
            android:name=".activities.GroupMembersActivity"
            android:label="@string/title_activity_group_members"
            android:parentActivityName=".activities.GroupActivity"
            android:screenOrientation="portrait" >
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="GroupActivity" />
        </activity>
        <activity
            android:name=".activities.AddToGroupActivity"
            android:label="@string/title_activity_add_to_group"
            android:parentActivityName=".activities.GroupActivity"
            android:screenOrientation="portrait" >
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="com.steps.activities.GroupActivity" />
        </activity>
        <activity
            android:name=".activities.AddNewTaskActivity"
            android:label="@string/title_activity_add_new_task"
            android:parentActivityName=".activities.GroupActivity"
            android:screenOrientation="portrait" >
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="com.steps.activities.GroupActivity" />
        </activity>
        <activity
            android:name=".activities.TaskActivity"
            android:label="@string/title_activity_task"
            android:parentActivityName=".activities.GroupActivity"
             android:screenOrientation="portrait">
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="com.steps.activities.GroupActivity" />
        </activity>
    </application>

</manifest>