use background image from theming app in drawer

src/main/java/com/owncloud/android/datamodel/FileDataStorageManager.java

@@ -1910,6 +1910,7 @@ public class FileDataStorageManager {
         cv.put(ProviderTableMeta.CAPABILITIES_EXTERNAL_LINKS, capability.getExternalLinks().getValue());
         cv.put(ProviderTableMeta.CAPABILITIES_SERVER_NAME, capability.getServerName());
         cv.put(ProviderTableMeta.CAPABILITIES_SERVER_COLOR, capability.getServerColor());
+        cv.put(ProviderTableMeta.CAPABILITIES_SERVER_BACKGROUND_URL, capability.getServerBackground());
 
         if (capabilityExists(mAccount.name)) {
             if (getContentResolver() != null) {
@@ -2051,6 +2052,8 @@ public class FileDataStorageManager {
                     .getColumnIndex(ProviderTableMeta.CAPABILITIES_EXTERNAL_LINKS))));
             capability.setServerName(c.getString(c.getColumnIndex(ProviderTableMeta.CAPABILITIES_SERVER_NAME)));
             capability.setServerColor(c.getString(c.getColumnIndex(ProviderTableMeta.CAPABILITIES_SERVER_COLOR)));
+            capability.setServerBackground(c.getString(c.getColumnIndex(
+                    ProviderTableMeta.CAPABILITIES_SERVER_BACKGROUND_URL)));
         }
         return capability;
     }

src/main/java/com/owncloud/android/db/ProviderMeta.java

@@ -149,6 +149,7 @@ public class ProviderMeta {
         public static final String CAPABILITIES_EXTERNAL_LINKS = "external_links";
         public static final String CAPABILITIES_SERVER_NAME = "server_name";
         public static final String CAPABILITIES_SERVER_COLOR = "server_color";
+        public static final String CAPABILITIES_SERVER_BACKGROUND_URL = "background_url";
 
         public static final String CAPABILITIES_DEFAULT_SORT_ORDER = CAPABILITIES_ACCOUNT_NAME
                 + " collate nocase asc";

src/main/java/com/owncloud/android/providers/FileContentProvider.java

@@ -1019,6 +1019,8 @@ public class FileContentProvider extends ContentProvider {
                             ADD_COLUMN + ProviderTableMeta.CAPABILITIES_SERVER_NAME + " TEXT ");
                     db.execSQL(ALTER_TABLE + ProviderTableMeta.CAPABILITIES_TABLE_NAME +
                             ADD_COLUMN + ProviderTableMeta.CAPABILITIES_SERVER_COLOR + " TEXT ");
+                    db.execSQL(ALTER_TABLE + ProviderTableMeta.CAPABILITIES_TABLE_NAME +
+                            ADD_COLUMN + ProviderTableMeta.CAPABILITIES_SERVER_BACKGROUND_URL + " TEXT ");
                     upgraded = true;
                     db.setTransactionSuccessful();
                 } finally {
@@ -1111,7 +1113,8 @@ public class FileContentProvider extends ContentProvider {
                 + ProviderTableMeta.CAPABILITIES_FILES_DROP + INTEGER  // boolean
                 + ProviderTableMeta.CAPABILITIES_EXTERNAL_LINKS + INTEGER  // boolean
                 + ProviderTableMeta.CAPABILITIES_SERVER_NAME + TEXT
-                + ProviderTableMeta.CAPABILITIES_SERVER_COLOR + " TEXT );");
+                + ProviderTableMeta.CAPABILITIES_SERVER_COLOR + TEXT
+                + ProviderTableMeta.CAPABILITIES_SERVER_BACKGROUND_URL + " TEXT );");
     }
 
     private void createUploadsTable(SQLiteDatabase db) {

src/main/java/com/owncloud/android/ui/activity/DrawerActivity.java

@@ -45,6 +45,7 @@ import android.widget.LinearLayout;
 import android.widget.ProgressBar;
 import android.widget.TextView;
 
+import com.bumptech.glide.Glide;
 import com.bumptech.glide.request.animation.GlideAnimation;
 import com.bumptech.glide.request.target.SimpleTarget;
 import com.owncloud.android.MainApp;
@@ -1000,6 +1001,36 @@ public abstract class DrawerActivity extends ToolbarActivity implements DisplayU
         }
     }
 
+    public void updateHeaderBackground() {
+        if (getAccount() != null &&
+                getStorageManager().getCapability(getAccount().name).getServerBackground() != null) {
+            String backgroundUrl = getStorageManager().getCapability(getAccount().name).getServerBackground();
+
+            final LinearLayout navigationHeader = (LinearLayout) findNavigationViewChildById(R.id.drawer_header_view);
+
+            SimpleTarget target = new SimpleTarget<Drawable>() {
+                @Override
+                public void onResourceReady(Drawable resource, GlideAnimation glideAnimation) {
+                    if (navigationHeader != null) {
+                        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
+                            navigationHeader.setBackgroundDrawable(resource);
+                        } else {
+                            navigationHeader.setBackground(resource);
+                        }
+                    }
+                }
+            };
+
+            Glide.with(this)
+                    .load(backgroundUrl)
+                    .centerCrop()
+                    .placeholder(R.drawable.background)
+                    .error(R.drawable.background)
+                    .crossFade()
+                    .into(target);
+        }
+    }
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -1058,6 +1089,7 @@ public abstract class DrawerActivity extends ToolbarActivity implements DisplayU
         updateAccountList();
         updateExternalLinksInDrawer();
         updateQuotaLink();
+        updateHeaderBackground();
     }
 
     @Override
@@ -1111,7 +1143,13 @@ public abstract class DrawerActivity extends ToolbarActivity implements DisplayU
      * @return The view if found or <code>null</code> otherwise.
      */
     private View findNavigationViewChildById(int id) {
-        return ((NavigationView) findViewById(R.id.nav_view)).getHeaderView(0).findViewById(id);
+        NavigationView view = ((NavigationView) findViewById(R.id.nav_view));
+
+        if (view != null) {
+            return view.getHeaderView(0).findViewById(id);
+        } else {
+            return null;
+        }
     }
 
     /**

src/main/java/com/owncloud/android/utils/DisplayUtils.java

@@ -693,18 +693,19 @@ public class DisplayUtils {
     }
 
     public static Drawable tintDrawable(@DrawableRes int id, @ColorRes int color) {
-        int colorToUse;
+        int colorToUse = MainApp.getAppContext().getResources().getColor(color);
 
         Account account = AccountUtils.getCurrentOwnCloudAccount(MainApp.getAppContext());
-        Context context = MainApp.getAppContext();
 
-        FileDataStorageManager storageManager = new FileDataStorageManager(account, context.getContentResolver());
-        OCCapability capability = storageManager.getCapability(account.name);
+        if (account != null) {
+            Context context = MainApp.getAppContext();
 
-        if (capability.getServerColor().isEmpty()) {
-            colorToUse = MainApp.getAppContext().getResources().getColor(color);
-        } else {
-            colorToUse = Color.parseColor(capability.getServerColor());
+            FileDataStorageManager storageManager = new FileDataStorageManager(account, context.getContentResolver());
+            OCCapability capability = storageManager.getCapability(account.name);
+
+            if (!capability.getServerColor().isEmpty()) {
+                colorToUse = Color.parseColor(capability.getServerColor());
+            }
         }
 
         Drawable drawable = ResourcesCompat.getDrawable(MainApp.getAppContext().getResources(), id, null);

src/main/res/layout/drawer_header.xml

@@ -19,6 +19,7 @@
   License along with this program. If not, see <http://www.gnu.org/licenses/>.
   -->
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:id="@+id/drawer_header_view"
               android:layout_width="match_parent"
               android:layout_height="@dimen/nav_drawer_header_height"
               android:background="@drawable/background"