Android: better flags, tags loading feedback

docs-android/app/src/main/res/layout/main_activity.xml

@@ -18,6 +18,7 @@
         android:layout_height="match_parent"
         android:layout_gravity="start"
         android:orientation="vertical"
+        android:clickable="true"
         android:background="#fff"
         android:elevation="5dp">
 
@@ -141,7 +142,33 @@
             android:layout_height="0dp"
             android:choiceMode="singleChoice"
             android:divider="@android:color/transparent"
-            android:dividerHeight="0dp" />
+            android:dividerHeight="0dp"/>
+
+        <RelativeLayout
+            android:id="@+id/tagProgressView"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:visibility="gone">
+
+            <ProgressBar
+                style="?android:progressBarStyle"
+                android:layout_centerInParent="true"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:indeterminate="true"/>
+
+        </RelativeLayout>
+
+        <TextView
+            android:id="@+id/tagEmptyView"
+            android:visibility="gone"
+            android:padding="12dp"
+            android:gravity="center"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:fontFamily="sans-serif-light"
+            android:text="@string/no_tags"
+            android:textSize="14sp"/>
 
     </LinearLayout>
 

docs-android/app/src/main/res/values/strings.xml

@@ -25,7 +25,9 @@
     <string name="downloading_document">Downloading document</string>
     <string name="action_search">Search documents</string>
     <string name="all_documents">All documents</string>
+    <string name="shared_documents">Shared documents</string>
     <string name="all_tags">All tags</string>
+    <string name="no_tags">No tags</string>
 
     <!-- Validation -->
     <string name="validate_error_email">Invalid email</string>
@@ -33,6 +35,5 @@
     <string name="validate_error_length_max">Too long (max. %d)</string>
     <string name="validate_error_required">Required</string>
     <string name="validate_error_alphanumeric">Only letters and numbers</string>
-    <string name="shared_documents">Shared documents</string>
 
 </resources>