android: make layouts nicer to work with by providing sample values in editor

Change-Id: I76495becb0257cb36340397d7296f26565fca4cd
(cherry picked from commit 20d5c4cc)

android/source/res/layout/about.xml

 <?xml version="1.0" encoding="utf-8"?>
 
-<ScrollView>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
               android:layout_width="match_parent"
-              android:layout_height="match_parent"
+              android:layout_height="wrap_content"
               android:orientation="vertical"
               android:padding="20dip">
 
@@ -33,7 +35,7 @@
         android:paddingTop="20dip"
         android:text="@string/app_credits"
         android:textColor="@android:color/secondary_text_light"
-        android:textSize="18dip"/>
+        android:textSize="18sp"/>
 
     <TextView
         android:id="@+id/about_vendor"

android/source/res/layout/document_part_list_layout.xml

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
@@ -8,13 +9,14 @@
 
     <ImageView
         android:id="@+id/image"
+        tools:src="@drawable/dummy_page"
         android:layout_width="128dp"
         android:layout_height="128dp"/>
 
     <TextView
         android:id="@+id/text"
+        tools:text="slide or page#"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="Large Text"
         android:textAppearance="?android:attr/textAppearanceLarge"/>
 </LinearLayout>
\ No newline at end of file

android/source/res/layout/file_explorer_grid_item.xml

@@ -6,6 +6,7 @@
  file, You can obtain one at http://mozilla.org/MPL/2.0/.
  -->
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:paddingTop="10dp"
@@ -13,22 +14,24 @@
 
     <ImageView
         android:id="@+id/grid_item_image"
+        tools:src="@drawable/folder"
         android:layout_width="100dp"
         android:layout_height="100dp"
         android:scaleType="fitStart"
-        android:layout_gravity="center">
+        android:layout_gravity="center"
+        android:contentDescription="@string/file_icon_desc" >
     </ImageView>
 
     <TextView
         android:id="@+id/grid_item_label"
+        tools:text="file or dirname"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="@+id/label"
         android:paddingLeft="10dp"
         android:paddingRight="10dp"
         android:paddingTop="10dp"
         android:layout_gravity="center"
-        android:textSize="15dp"
+        android:textSize="15sp"
         android:textStyle="bold"
         android:textColor="@android:color/secondary_text_light"
         android:maxLines="2">

android/source/res/layout/file_list_item.xml

@@ -6,33 +6,39 @@
  file, You can obtain one at http://mozilla.org/MPL/2.0/.
  -->
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="48dp"
     android:orientation="horizontal" >
     <ImageView
         android:id="@+id/file_list_item_icon"
+        tools:src="@drawable/folder"
         android:layout_height="match_parent"
         android:layout_width="32dp"
         android:layout_margin="8dp"
-        android:layout_gravity="center"/>
+        android:layout_gravity="center"
+        android:contentDescription="@string/file_icon_desc" />
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="48dp"
         android:orientation="horizontal">
         <TextView
             android:id="@+id/file_list_item_name"
+            tools:text="file or dirname"
             style="@style/ListItemText"
             android:layout_height="match_parent"
             android:layout_width="0dp"
             android:layout_weight="2" />
         <TextView
             android:id="@+id/file_list_item_size"
+            tools:text="filesize"
             style="@style/ListItemText"
             android:layout_height="match_parent"
             android:layout_width="0dp"
             android:layout_weight="1" />
         <TextView
             android:id="@+id/file_list_item_date"
+            tools:text="date/time"
             style="@style/ListItemText"
             android:layout_height="match_parent"
             android:layout_width="0dp"

android/source/res/menu/main.xml

@@ -4,6 +4,7 @@
     tools:context="org.libreoffice.MainActivity">
 
     <group android:id="@+id/group_edit_actions"
+           tools:visible="true"
            android:visible="false">
         <item android:id="@+id/action_bold"
               android:title="@string/action_bold"

android/source/res/values/strings.xml

@@ -30,6 +30,7 @@
     <string name="menu_sort_az">Sort A-Z</string>
     <string name="menu_sort_modified">Sort by Date</string>
     <string name="menu_preferences">Preferences</string>
+    <string name="file_icon_desc">fileicon</string>
     <!-- Pref keys as resources ; Not currently used -->
     <string name="EXPLORER_VIEW_TYPE_KEY">EXPLORER_VIEW_TYPE</string>
     <string name="CURRENT_DIRECTORY_KEY">CURRENT_DIRECTORY</string>
@@ -66,7 +67,7 @@
 
     <!-- Feedback messages -->
     <string name="message_saved">Save complete</string>
-    <string name="message_saving">Saving the document...</string>
+    <string name="message_saving">Saving the document…</string>
     <string name="message_save_incomplete">Save incomplete. Were there any changes?</string>
 
     <!-- Document provider settings -->