Change hamburguer icon by arrow when it is needed. Remove some imports

src/com/owncloud/android/ui/activity/FileActivity.java

@@ -44,10 +44,8 @@ import android.support.v7.app.ActionBar;
 import android.support.v7.app.ActionBarActivity;
 import android.view.View;
 import android.widget.AdapterView;
-import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.ListView;
-import android.widget.TextView;
 import android.widget.Toast;
 
 import com.owncloud.android.BuildConfig;
@@ -59,15 +57,14 @@ import com.owncloud.android.datamodel.FileDataStorageManager;
 import com.owncloud.android.datamodel.OCFile;
 import com.owncloud.android.files.FileOperationsHelper;
 import com.owncloud.android.files.services.FileDownloader;
-import com.owncloud.android.files.services.FileUploader;
 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
+import com.owncloud.android.files.services.FileUploader;
 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
 import com.owncloud.android.lib.common.operations.OnRemoteOperationListener;
 import com.owncloud.android.lib.common.operations.RemoteOperation;
 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
 import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
 import com.owncloud.android.lib.common.utils.Log_OC;
-import com.owncloud.android.lib.resources.files.FileUtils;
 import com.owncloud.android.operations.CreateShareOperation;
 import com.owncloud.android.operations.SynchronizeFolderOperation;
 import com.owncloud.android.operations.UnshareLinkOperation;
@@ -77,7 +74,6 @@ import com.owncloud.android.ui.NavigationDrawerItem;
 import com.owncloud.android.ui.adapter.NavigationDrawerListAdapter;
 import com.owncloud.android.ui.dialog.LoadingDialog;
 import com.owncloud.android.ui.dialog.SharePasswordDialogFragment;
-import com.owncloud.android.utils.DisplayUtils;
 import com.owncloud.android.utils.ErrorMessageAdapter;
 
 import java.util.ArrayList;
@@ -376,6 +372,7 @@ public class FileActivity extends ActionBarActivity
                 super.onDrawerOpened(drawerView);
                 getSupportActionBar().setTitle(R.string.drawer_open);
                 getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
+                mDrawerToggle.setDrawerIndicatorEnabled(true);
                 invalidateOptionsMenu();
             }
         };

src/com/owncloud/android/ui/activity/FileDisplayActivity.java

@@ -54,10 +54,7 @@ import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.ViewGroup;
 import android.view.Window;
-import android.widget.ArrayAdapter;
-import android.widget.TextView;
 import android.widget.Toast;
 
 import com.owncloud.android.MainApp;
@@ -77,7 +74,6 @@ import com.owncloud.android.lib.common.operations.RemoteOperation;
 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
 import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
 import com.owncloud.android.lib.common.utils.Log_OC;
-import com.owncloud.android.lib.resources.files.FileUtils;
 import com.owncloud.android.operations.CreateFolderOperation;
 import com.owncloud.android.operations.CreateShareOperation;
 import com.owncloud.android.operations.MoveFileOperation;
@@ -500,16 +496,14 @@ public class FileDisplayActivity extends HookActivity
             case android.R.id.home: {
                 FileFragment second = getSecondFragment();
                 OCFile currentDir = getCurrentDir();
-                if((currentDir != null && currentDir.getParentId() != 0) ||
+                if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
+                    mDrawerLayout.closeDrawer(GravityCompat.START);
+                } else if((currentDir != null && currentDir.getParentId() != 0) ||
                         (second != null && second.getFile() != null)) {
                     onBackPressed();
 
                 } else {
-                    if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
-                        mDrawerLayout.closeDrawer(GravityCompat.START);
-                    } else {
-                        mDrawerLayout.openDrawer(GravityCompat.START);
-                    }
+                    mDrawerLayout.openDrawer(GravityCompat.START);
                 }
                 break;
             }

src/com/owncloud/android/ui/adapter/NavigationDrawerListAdapter.java

@@ -21,34 +21,23 @@
 
 package com.owncloud.android.ui.adapter;
 
-import java.math.BigInteger;
-import java.security.MessageDigest;
-import java.util.ArrayList;
-import java.util.Locale;
-
 import android.accounts.Account;
 import android.accounts.AccountManager;
 import android.content.Context;
-import android.graphics.Color;
-import android.text.TextUtils;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.BaseAdapter;
 import android.widget.LinearLayout;
-import android.widget.RadioButton;
-import android.widget.RadioGroup;
-import android.widget.RadioGroup.LayoutParams;
 import android.widget.TextView;
 
 import com.owncloud.android.MainApp;
 import com.owncloud.android.R;
 import com.owncloud.android.authentication.AccountUtils;
-import com.owncloud.android.lib.common.utils.Log_OC;
 import com.owncloud.android.ui.NavigationDrawerItem;
-import com.owncloud.android.ui.TextDrawable;
 import com.owncloud.android.ui.activity.FileActivity;
-import com.owncloud.android.utils.BitmapUtils;
+
+import java.util.ArrayList;
 
 public class NavigationDrawerListAdapter extends BaseAdapter {
 

src/com/owncloud/android/ui/preview/PreviewImageActivity.java

@@ -404,6 +404,7 @@ public class PreviewImageActivity extends FileActivity implements
         } else {
             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position); 
             getSupportActionBar().setTitle(currentFile.getFileName());
+            mDrawerToggle.setDrawerIndicatorEnabled(false);
             if (!currentFile.isDown()) {
                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
                     requestForDownload(currentFile);