removing android4 calls to actionbar and fragments manager

src/eu/alefzero/owncloud/ui/activity/FileDisplayActivity.java

@@ -22,13 +22,14 @@ import android.accounts.Account;
 import android.accounts.AccountManager;
 import android.app.AlertDialog;
 import android.app.Dialog;
-import android.app.ActionBar.OnNavigationListener;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.DialogInterface.OnCancelListener;
 import android.content.res.Configuration;
 import android.os.Bundle;
+import android.support.v4.app.ActionBar;
 import android.support.v4.app.FragmentTransaction;
+import android.support.v4.app.ActionBar.OnNavigationListener;
 import android.support.v4.view.Menu;
 import android.support.v4.view.MenuItem;
 import android.view.MenuInflater;
@@ -65,9 +66,10 @@ public class FileDisplayActivity extends android.support.v4.app.FragmentActivity
     mDirectories = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item);
     mDirectories.add("/");
     setContentView(R.layout.files);
-    getActionBar().setNavigationMode(android.support.v4.app.ActionBar.NAVIGATION_MODE_LIST);
-    getActionBar().setDisplayShowTitleEnabled(false);
-    getActionBar().setListNavigationCallbacks(mDirectories, this);
+    ActionBar action_bar = getSupportActionBar();
+    action_bar.setNavigationMode(android.support.v4.app.ActionBar.NAVIGATION_MODE_LIST);
+    action_bar.setDisplayShowTitleEnabled(false);
+    action_bar.setListNavigationCallbacks(mDirectories, this);
 
     FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
     ft.add(R.id.file_list_container, new FileList());