update day labels based on settings

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

@@ -54,6 +54,7 @@ public class MainActivity extends SimpleActivity implements Calendar {
     private int mWeakTextColor;
     private int mTextColorWithEvent;
     private int mWeakTextColorWithEvent;
+    private boolean mSundayFirst;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -69,6 +70,7 @@ public class MainActivity extends SimpleActivity implements Calendar {
         mWeakTextColorWithEvent = Utils.adjustAlpha(mRes.getColor(R.color.colorPrimary), Constants.LOW_ALPHA);
         mLeftArrow.getDrawable().mutate().setColorFilter(mTextColor, PorterDuff.Mode.SRC_ATOP);
         mRightArrow.getDrawable().mutate().setColorFilter(mTextColor, PorterDuff.Mode.SRC_ATOP);
+        mSundayFirst = mConfig.getIsSundayFirst();
 
         mPackageName = getPackageName();
         mDayTextSize /= mRes.getDisplayMetrics().density;
@@ -85,6 +87,10 @@ public class MainActivity extends SimpleActivity implements Calendar {
     protected void onResume() {
         super.onResume();
         mCalendar.updateCalendar(new DateTime());
+        if (mConfig.getIsSundayFirst() != mSundayFirst) {
+            mSundayFirst = mConfig.getIsSundayFirst();
+            setupLabels();
+        }
     }
 
     @Override
@@ -217,11 +223,20 @@ public class MainActivity extends SimpleActivity implements Calendar {
     }
 
     private void setupLabels() {
+        int letters[] = {R.string.sunday_letter, R.string.monday_letter, R.string.tuesday_letter, R.string.wednesday_letter,
+                R.string.thursday_letter, R.string.friday_letter, R.string.saturday_letter};
+
         for (int i = 0; i < 7; i++) {
             final TextView dayTV = (TextView) findViewById(mRes.getIdentifier("label_" + i, "id", mPackageName));
             if (dayTV != null) {
                 dayTV.setTextSize(mDayTextSize);
                 dayTV.setTextColor(mWeakTextColor);
+
+                int index = i;
+                if (!mSundayFirst)
+                    index = (index + 1) % letters.length;
+
+                dayTV.setText(getString(letters[index]));
             }
         }
     }

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

@@ -11,55 +11,48 @@
         style="@style/DayView"
         android:layout_width="0dp"
         android:layout_height="match_parent"
-        android:layout_weight="1"
+        android:layout_weight="1"/>
-        android:text="@string/monday_letter"/>
 
     <TextView
         android:id="@+id/label_1"
         style="@style/DayView"
         android:layout_width="0dp"
         android:layout_height="match_parent"
-        android:layout_weight="1"
+        android:layout_weight="1"/>
-        android:text="@string/tuesday_letter"/>
 
     <TextView
         android:id="@+id/label_2"
         style="@style/DayView"
         android:layout_width="0dp"
         android:layout_height="match_parent"
-        android:layout_weight="1"
+        android:layout_weight="1"/>
-        android:text="@string/wednesday_letter"/>
 
     <TextView
         android:id="@+id/label_3"
         style="@style/DayView"
         android:layout_width="0dp"
         android:layout_height="match_parent"
-        android:layout_weight="1"
+        android:layout_weight="1"/>
-        android:text="@string/wednesday_letter"/>
 
     <TextView
         android:id="@+id/label_4"
         style="@style/DayView"
         android:layout_width="0dp"
         android:layout_height="match_parent"
-        android:layout_weight="1"
+        android:layout_weight="1"/>
-        android:text="@string/friday_letter"/>
 
     <TextView
         android:id="@+id/label_5"
         style="@style/DayView"
         android:layout_width="0dp"
         android:layout_height="match_parent"
-        android:layout_weight="1"
+        android:layout_weight="1"/>
-        android:text="@string/saturday_letter"/>
 
     <TextView
         android:id="@+id/label_6"
         style="@style/DayView"
         android:layout_width="0dp"
         android:layout_height="match_parent"
-        android:layout_weight="1"
+        android:layout_weight="1"/>
-        android:text="@string/sunday_letter"/>
 
 </LinearLayout>