How to start master/detail in Activity

Question

When I will start my master/detail activity(FolderListActivity) from another activity

startActivity(new Intent(getApplicationContext, FolderListActivity.class))) 
or
startActivity(new Intent(getApplicationContext, FolderDetailActivity.class))) 

it shows only one side in full screen. It works in separately project. How to properly show my master/detail. As shown below:

Details

AndroidManifies.xml:

<activity
    ...
</activity>
<activity
    ...
</activity>
  <activity
    android:name="com.mypck.FolderListActivity"
    android:label="@string/app_name" >
</activity>
<activity
    android:name="com.mypck.FolderDetailActivity"
    android:label="@string/title_folder_detail"
    android:parentActivityName=".FolderListActivity" >
    <meta-data
        android:name="android.support.PARENT_ACTIVITY"
        android:value=".FolderListActivity" />
</activity>

I've seen this question, but there is no useful answer for me. Thanks in advance.

Answer 1

I did fix it. There was my error, when I moved to my current project I forgot values-large. It has a specific item for large devices.

refs.xml

<resources>

    <item name="activity_folder_list" type="layout">@layout/activity_folder_twopane</item>

</resources>

Regards. B&B