Minor layout fixes.

app/src/main/res/layout-land/activity_about.xml

@@ -58,6 +58,7 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center_horizontal"
+            android:gravity="center"
             android:layout_marginTop="0dp"
             android:textSize="@dimen/text_size"
             android:text="@string/about_author_names" />
@@ -66,6 +67,7 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginTop="30dp"
+            android:gravity="center"
             android:textSize="@dimen/text_size"
             android:layout_gravity="center_horizontal"
             android:text="@string/privacy_friendly"/>
@@ -117,6 +119,7 @@
             android:layout_marginTop="20dp"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
+            android:gravity="center"
             android:text="@string/about_qqwing"
             android:textSize="@dimen/text_size"
             android:layout_gravity="center_horizontal"/>

app/src/main/res/layout-land/welcome_dialog.xml

@@ -15,6 +15,7 @@
         android:layout_weight="1">
         <TextView
             android:layout_width="wrap_content"
+            android:gravity="center"
             android:layout_height="wrap_content"
             android:text="@string/welcome" />
         <TextView
@@ -76,6 +77,7 @@
             style="@style/RatingBar"/>
         <TextView
             android:layout_width="wrap_content"
+            android:gravity="center"
             android:layout_height="wrap_content"
             android:text="@string/difficulty_description"/>
     </LinearLayout>

app/src/main/res/layout-xlarge-land/activity_about.xml

@@ -29,6 +29,7 @@
         <TextView
             android:id="@+id/appName"
             android:layout_width="wrap_content"
+            android:gravity="center"
             android:layout_height="wrap_content"
             android:layout_gravity="center_horizontal"
             android:layout_marginTop="20dp"
@@ -56,6 +57,7 @@
         <TextView
             android:id="@+id/textFieldAuthorNames"
             android:layout_width="wrap_content"
+            android:gravity="center"
             android:layout_height="wrap_content"
             android:layout_gravity="center_horizontal"
             android:layout_marginTop="0dp"
@@ -65,6 +67,7 @@
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
+            android:gravity="center"
             android:layout_marginTop="30dp"
             android:layout_gravity="center_horizontal"
             android:textSize="@dimen/text_size"
@@ -81,6 +84,7 @@
         <TextView
             android:id="@+id/textFieldAffiliation"
             android:layout_width="wrap_content"
+            android:gravity="center"
             android:layout_height="wrap_content"
             android:layout_gravity="center_horizontal"
             android:textSize="@dimen/text_size"
@@ -100,11 +104,13 @@
             android:layout_gravity="center_horizontal"
             android:textSize="@dimen/text_size"
             android:layout_marginTop="20dp"
+            android:gravity="center"
             android:text="@string/more_info"/>
 
         <TextView
             android:id="@+id/linkID"
             android:layout_width="wrap_content"
+            android:gravity="center"
             android:layout_height="wrap_content"
             android:text="@string/url"
             android:textSize="@dimen/text_size"
@@ -117,6 +123,7 @@
             android:layout_marginTop="20dp"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
+            android:gravity="center"
             android:textSize="@dimen/text_size"
             android:text="@string/about_qqwing"
             android:layout_gravity="center_horizontal"/>
@@ -126,6 +133,7 @@
             android:layout_height="wrap_content"
             android:textSize="@dimen/text_size"
             android:text="@string/about_qqwingLink"
+            android:gravity="center"
             android:layout_gravity="center_horizontal"
             android:autoLink="web"/>
 

app/src/main/res/layout-xlarge/activity_about.xml

@@ -70,6 +70,7 @@
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
+        android:gravity="center"
         android:layout_marginTop="10dp"
         android:layout_gravity="center_horizontal"
         android:text="@string/privacy_friendly"/>
@@ -77,6 +78,7 @@
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
+        android:gravity="center"
         android:layout_gravity="center_horizontal"
         android:layout_marginTop="20dp"
         android:text="@string/more_info"/>
@@ -94,6 +96,7 @@
         android:id="@+id/qqWing"
         android:layout_marginTop="20dp"
         android:layout_width="wrap_content"
+        android:gravity="center"
         android:layout_height="wrap_content"
         android:text="@string/about_qqwing"
         android:layout_gravity="center_horizontal"/>

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

@@ -16,6 +16,7 @@
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
+    android:gravity="center"
     tools:context=".AboutActivity">
     <ImageView
         android:id="@+id/barcodeLogo"
@@ -29,6 +30,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
+        android:gravity="center"
         android:layout_marginTop="20dp"
         android:text="@string/app_name_long" />
 
@@ -53,6 +55,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
+        android:gravity="center"
         android:layout_marginTop="0dp"
         android:text="@string/about_author_names" />
 
@@ -77,6 +80,7 @@
         android:layout_height="wrap_content"
         android:layout_marginTop="10dp"
         android:layout_gravity="center_horizontal"
+        android:gravity="center"
         android:text="@string/privacy_friendly"/>
 
     <TextView
@@ -84,6 +88,7 @@
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:layout_marginTop="20dp"
+        android:gravity="center"
         android:text="@string/more_info"/>
 
     <TextView
@@ -100,6 +105,7 @@
         android:layout_marginTop="20dp"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
+        android:gravity="center"
         android:text="@string/about_qqwing"
         android:layout_gravity="center_horizontal"/>
 

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

@@ -70,6 +70,7 @@
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
+        android:gravity="center"
         android:text="@string/difficulty_description"/>
 </LinearLayout>
 </ScrollView>

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

@@ -59,7 +59,7 @@
     <string name="app_name_long" translatable="false">Privacy Friendly Sudoku</string>
     <string name="version_number" translatable="false">v1.0</string>
     <string name="about_author">Author:</string>
-    <string name="about_author_names" translatable="false">Christopher Beckmann, Timm Lippert</string>
+    <string name="about_author_names" translatable="false">Christopher Beckmann,\nTimm Lippert</string>
     <string name="about_affiliation">In affiliation with:</string>
     <string name="privacy_friendly">This application belongs to the Privacy Friendly Apps.</string>
     <string name="more_info">More information can be found on:</string>