add some strings and formatting

app/src/main/java/com/simplemobiletools/draw/activities/MainActivity.java

@@ -90,7 +90,7 @@ public class MainActivity extends SimpleActivity implements MyCanvas.PathsChange
                 mMyCanvas.clearCanvas();
                 return true;
             case R.id.change_background:
-                int oldColor = ((ColorDrawable)mMyCanvas.getBackground()).getColor();
+                int oldColor = ((ColorDrawable) mMyCanvas.getBackground()).getColor();
                 AmbilWarnaDialog dialog = new AmbilWarnaDialog(this, oldColor,
                         new AmbilWarnaDialog.OnAmbilWarnaListener() {
                             @Override
@@ -100,9 +100,9 @@ public class MainActivity extends SimpleActivity implements MyCanvas.PathsChange
                             @Override
                             public void onOk(AmbilWarnaDialog dialog, int pickedColor) {
                                 if (Utils.shouldUseWhite(pickedColor)) {
-                                    ((ImageView)mUndoBtn).setImageResource(R.mipmap.undo_white);
+                                    ((ImageView) mUndoBtn).setImageResource(R.mipmap.undo_white);
                                 } else {
-                                    ((ImageView)mUndoBtn).setImageResource(R.mipmap.undo_black);
+                                    ((ImageView) mUndoBtn).setImageResource(R.mipmap.undo_black);
                                 }
                                 mMyCanvas.setBackgroundColor(pickedColor);
                             }

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

@@ -17,6 +17,7 @@
     <string name="settings">Einstellungen</string>
     <string name="dark_theme">Dunkles Design</string>
     <string name="clear">Leeren</string>
+    <string name="change_background">Change background</string>
 
     <!-- About -->
     <string name="about">Über</string>

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

@@ -17,6 +17,7 @@
     <string name="settings">Impostazioni</string>
     <string name="dark_theme">Tema scuro</string>
     <string name="clear">Clear</string>
+    <string name="change_background">Change background</string>
 
     <!-- About -->
     <string name="about">Informazioni</string>

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

@@ -17,6 +17,7 @@
     <string name="settings">設定</string>
     <string name="dark_theme">ダークテーマ</string>
     <string name="clear">クリア</string>
+    <string name="change_background">Change background</string>
 
     <!-- About -->
     <string name="about">アプリについて</string>

app/src/main/res/values-pt-rPT/strings.xml

@@ -17,6 +17,7 @@
     <string name="settings">Definições</string>
     <string name="dark_theme">Tema escuro</string>
     <string name="clear">Limpar</string>
+    <string name="change_background">Change background</string>
 
     <!-- About -->
     <string name="about">Acerca</string>

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

@@ -17,6 +17,7 @@
     <string name="settings">Inställningar</string>
     <string name="dark_theme">Mörkt tema</string>
     <string name="clear">Clear</string>
+    <string name="change_background">Change background</string>
 
     <!-- About -->
     <string name="about">Om</string>