Adds content descriptions and hints to non-textual elements so they can be described by screen readers.

app/src/main/java/com/keylesspalace/tusky/AccountActivity.java

@@ -289,6 +289,16 @@ public class AccountActivity extends BaseActivity {
         updateButtons();
     }
 
+    private void updateFollowButton(FloatingActionButton button) {
+        if (following) {
+            button.setImageResource(R.drawable.ic_person_minus_24px);
+            button.setContentDescription(getString(R.string.action_unfollow));
+        } else {
+            button.setImageResource(R.drawable.ic_person_add_24dp);
+            button.setContentDescription(getString(R.string.action_follow));
+        }
+    }
+
     private void updateButtons() {
         invalidateOptionsMenu();
 
@@ -297,24 +307,13 @@ public class AccountActivity extends BaseActivity {
         if(!isSelf && !blocking) {
             floatingBtn.show();
 
-            if (following) {
-                floatingBtn.setImageResource(R.drawable.ic_person_minus_24px);
-            } else {
-                floatingBtn.setImageResource(R.drawable.ic_person_add_24dp);
-            }
+            updateFollowButton(floatingBtn);
 
             floatingBtn.setOnClickListener(new View.OnClickListener() {
                 @Override
                 public void onClick(View v) {
-
                     follow(accountId);
-
-                    if (following) {
-                        floatingBtn.setImageResource(R.drawable.ic_person_minus_24px);
-                    } else {
-                        floatingBtn.setImageResource(R.drawable.ic_person_add_24dp);
-                    }
-
+                    updateFollowButton(floatingBtn);
                 }
             });
         }

app/src/main/res/layout/activity_account.xml

@@ -36,7 +36,8 @@
                     app:layout_collapseMode="pin"
                     android:fitsSystemWindows="true"
                     android:layout_alignTop="@+id/account_header_info"
-                    android:layout_alignBottom="@id/account_header_info" />
+                    android:layout_alignBottom="@id/account_header_info"
+                    android:contentDescription="@null" />
 
                 <LinearLayout
                     android:orientation="vertical"
@@ -101,7 +102,8 @@
                                     android:layout_toEndOf="@id/account_username"
                                     app:srcCompat="@drawable/reblog_disabled_light"
                                     android:tint="?android:textColorSecondary"
-                                    android:layout_toRightOf="@id/account_username" />
+                                    android:layout_toRightOf="@id/account_username"
+                                    android:contentDescription="@string/description_account_locked"/>
                             </RelativeLayout>
                         </LinearLayout>
 
@@ -181,6 +183,7 @@
         android:layout_gravity="bottom|end"
         android:layout_margin="16dp"
         android:layout_height="wrap_content"
-        app:srcCompat="@drawable/ic_person_add_24dp"/>
+        app:srcCompat="@drawable/ic_person_add_24dp"
+        android:contentDescription="@string/action_follow" />
 
 </android.support.design.widget.CoordinatorLayout>

app/src/main/res/layout/activity_compose.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<android.support.design.widget.CoordinatorLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/activity_compose"
     android:layout_width="match_parent"
@@ -96,7 +97,8 @@
                 android:layout_width="32dp"
                 android:layout_height="32dp"
                 android:layout_marginRight="8dp"
-                app:srcCompat="@drawable/ic_attach_file_24dp" />
+                app:srcCompat="@drawable/ic_attach_file_24dp"
+                android:contentDescription="@string/action_photo_pick" />
 
             <ImageButton
                 android:id="@+id/action_toggle_visibility"
@@ -104,7 +106,8 @@
                 android:layout_width="32dp"
                 android:layout_height="32dp"
                 android:layout_marginRight="8dp"
-                app:srcCompat="@drawable/ic_public_24dp" />
+                app:srcCompat="@drawable/ic_public_24dp"
+                android:contentDescription="@string/action_compose_options" />
 
             <Button
                 android:id="@+id/action_toggle_nsfw"

app/src/main/res/layout/activity_login.xml

@@ -17,7 +17,8 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginBottom="50dp"
-            android:src="@drawable/elephant_friend"/>
+            android:src="@drawable/elephant_friend"
+            android:contentDescription="@string/description_elephant_friend" />
 
         <android.support.design.widget.TextInputLayout
             android:layout_height="wrap_content"
@@ -36,7 +37,6 @@
             android:layout_width="250dp"
             android:layout_height="wrap_content"
             android:layout_marginTop="4dp"
-            android:elevation="0dp"
             android:textColor="@android:color/white"
             android:text="@string/action_login" />
 

app/src/main/res/layout/activity_main.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<android.support.design.widget.CoordinatorLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/activity_main"
@@ -80,7 +81,6 @@
         android:background="@drawable/material_drawer_shadow_bottom"
         android:visibility="visible" />
 
-
     <android.support.design.widget.FloatingActionButton
         android:id="@+id/floating_btn"
         android:layout_width="wrap_content"
@@ -89,10 +89,13 @@
         android:clickable="true"
         android:layout_margin="16dp"
         android:layout_height="wrap_content"
-        app:srcCompat="@drawable/ic_create_24dp"/>
+        app:srcCompat="@drawable/ic_create_24dp"
+        android:contentDescription="@string/action_compose" />
 
     <FrameLayout
         android:id="@+id/overlay_fragment_container"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"></FrameLayout>
+        android:layout_height="match_parent">
+
+    </FrameLayout>
 </android.support.design.widget.CoordinatorLayout>

app/src/main/res/layout/item_blocked_user.xml

@@ -24,7 +24,8 @@
         style="?attr/image_button_style"
         android:layout_alignParentRight="true"
         android:layout_marginLeft="16dp"
-        android:layout_centerVertical="true" />
+        android:layout_centerVertical="true"
+        android:contentDescription="@string/action_unblock" />
 
     <LinearLayout
         android:layout_width="wrap_content"

app/src/main/res/layout/item_follow.xml

@@ -24,7 +24,8 @@
             app:srcCompat="@drawable/ic_person_add_24dp"
             android:paddingRight="10dp"
             android:paddingLeft="24dp"
-            android:tint="?attr/colorAccent" />
+            android:tint="?attr/colorAccent"
+            android:contentDescription="@string/action_follow" />
 
         <TextView
             android:id="@+id/notification_text"
@@ -50,7 +51,8 @@
             android:scaleType="fitCenter"
             android:layout_marginLeft="8dp"
             android:layout_marginRight="10dp"
-            android:layout_alignParentLeft="true" />
+            android:layout_alignParentLeft="true"
+            android:contentDescription="@null" />
 
         <LinearLayout
             android:layout_width="wrap_content"

app/src/main/res/layout/item_status.xml

@@ -22,7 +22,8 @@
             android:id="@+id/status_reblogged_icon"
             android:paddingRight="10dp"
             android:paddingLeft="24dp"
-            android:tint="?android:textColorTertiary" />
+            android:tint="?android:textColorTertiary"
+            android:contentDescription="@null" />
 
         <TextView
             android:layout_width="wrap_content"
@@ -41,7 +42,8 @@
         android:id="@+id/status_avatar"
         android:layout_below="@+id/status_reblogged_bar"
         android:layout_marginTop="11dp"
-        android:layout_marginRight="10dp" />
+        android:layout_marginRight="10dp"
+        android:contentDescription="@null" />
 
     <RelativeLayout
         android:layout_height="wrap_content"
@@ -58,7 +60,7 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_alignParentRight="true"
-            android:text="20m ago"
+            android:text="20m"
             android:textColor="?android:textColorSecondary" />
 
         <LinearLayout
@@ -147,6 +149,7 @@
             android:orientation="vertical"
             android:layout_width="match_parent"
             android:layout_height="wrap_content">
+
             <LinearLayout
                 android:orientation="horizontal"
                 android:layout_width="match_parent"
@@ -160,7 +163,8 @@
                     android:layout_weight="1"
                     android:layout_marginRight="2dp"
                     android:scaleType="centerCrop"
-                    android:layout_marginTop="@dimen/status_media_preview_top_margin" />
+                    android:layout_marginTop="@dimen/status_media_preview_top_margin"
+                    android:contentDescription="@null" />
 
                 <ImageView
                     android:id="@+id/status_media_preview_1"
@@ -169,7 +173,9 @@
                     android:layout_weight="1"
                     android:layout_marginLeft="2dp"
                     android:scaleType="centerCrop"
-                    android:layout_marginTop="@dimen/status_media_preview_top_margin" />
+                    android:layout_marginTop="@dimen/status_media_preview_top_margin"
+                    android:contentDescription="@null" />
+
             </LinearLayout>
 
             <LinearLayout
@@ -184,7 +190,8 @@
                     android:layout_height="@dimen/status_media_preview_height"
                     android:layout_weight="1"
                     android:layout_marginRight="2dp"
-                    android:scaleType="centerCrop" />
+                    android:scaleType="centerCrop"
+                    android:contentDescription="@null" />
 
                 <ImageView
                     android:id="@+id/status_media_preview_3"
@@ -192,9 +199,11 @@
                     android:layout_height="@dimen/status_media_preview_height"
                     android:layout_marginLeft="2dp"
                     android:layout_weight="1"
-                    android:scaleType="centerCrop" />
+                    android:scaleType="centerCrop"
+                    android:contentDescription="@null" />
 
             </LinearLayout>
+
         </LinearLayout>
 
         <LinearLayout
@@ -241,7 +250,8 @@
             android:id="@+id/status_reply"
             android:layout_width="32dp"
             android:layout_height="32dp"
-            style="?attr/image_button_style" />
+            style="?attr/image_button_style"
+            android:contentDescription="@string/action_reply" />
 
         <Space
             android:layout_width="0dp"
@@ -257,7 +267,8 @@
             app:sparkbutton_primaryColor="@color/status_reblog_button_marked_dark"
             app:sparkbutton_secondaryColor="@color/status_reblog_button_marked_light"
             android:layout_width="32dp"
-            android:layout_height="32dp" />
+            android:layout_height="32dp"
+            android:contentDescription="@string/action_reblog" />
 
         <Space
             android:layout_width="0dp"
@@ -273,7 +284,8 @@
             android:layout_gravity="center"
             app:sparkbutton_primaryColor="@color/status_favourite_button_marked_dark"
             app:sparkbutton_secondaryColor="@color/status_favourite_button_marked_light"
-            android:id="@+id/status_favourite" />
+            android:id="@+id/status_favourite"
+            android:contentDescription="@string/action_favourite" />
 
         <Space
             android:layout_width="0dp"
@@ -285,7 +297,8 @@
             android:id="@+id/status_more"
             android:layout_width="32dp"
             android:layout_height="32dp"
-            style="?attr/image_button_style" />
+            style="?attr/image_button_style"
+            android:contentDescription="@string/action_more" />
 
         <Space
             android:layout_width="0dp"

app/src/main/res/layout/item_status_notification.xml

@@ -21,7 +21,8 @@
             android:id="@+id/notification_icon"
             android:paddingRight="10dp"
             android:paddingLeft="24dp"
-            app:srcCompat="@drawable/ic_repeat_24dp" />
+            app:srcCompat="@drawable/ic_repeat_24dp"
+            android:contentDescription="@null" />
 
         <TextView
             android:layout_width="wrap_content"

app/src/main/res/layout/tab_account.xml

@@ -1,10 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent">
-
-    <RelativeLayout
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_centerInParent="true">
@@ -26,5 +22,3 @@
         android:textSize="10sp" />
 
 </RelativeLayout>
-
-</RelativeLayout>

app/src/main/res/values/strings.xml

@@ -46,6 +46,10 @@
     <string name="report_username_format">Report @%s</string>
     <string name="report_comment_hint">Additional comments?</string>
 
+    <string name="action_reply">Reply</string>
+    <string name="action_reblog">Boost</string>
+    <string name="action_favourite">Favourite</string>
+    <string name="action_more">More</string>
     <string name="action_compose">Compose</string>
     <string name="action_login">Login with Mastodon</string>
     <string name="action_logout">Log Out</string>
@@ -76,6 +80,7 @@
     <string name="action_unmute">Unmute</string>
     <string name="action_mention">Mention</string>
     <string name="toggle_nsfw">NSFW</string>
+    <string name="action_compose_options">Options</string>
 
     <string name="send_status_to">Share toot URL to…</string>
 
@@ -121,7 +126,8 @@
     <string name="pref_title_appearance_settings">Appearance</string>
     <string name="pref_title_light_theme">Use the Light Theme</string>
     <string name="pref_title_browser_settings">Browser</string>
-    <string name="pre_title_custom_tabs">Use Chrome Custom Tabs</string>
+    <string name="pref_title_custom_tabs">Use Chrome Custom Tabs</string>
+    <string name="pref_title_hide_follow_button">Hide follow button while scrolling</string>
 
     <string name="notification_mention_format">%s mentioned you</string>
     <string name="notification_summary_large">%1$s, %2$s, %3$s and %4$d others</string>
@@ -129,4 +135,7 @@
     <string name="notification_summary_small">%1$s and %2$s</string>
     <string name="notification_title_summary">%d new interactions</string>
 
+    <string name="description_elephant_friend">Elephant Friend</string>
+    <string name="description_account_locked">Locked Account</string>
+
 </resources>

app/src/main/res/xml/preferences.xml

@@ -11,7 +11,7 @@
 
         <CheckBoxPreference
             android:key="fabHide"
-            android:title="Hide FAB while scrolling"
+            android:title="@string/pref_title_hide_follow_button"
             android:defaultValue="false" />
 
     </PreferenceCategory>