setup the first day of the month

app/src/main/kotlin/com/simplemobiletools/calendar/fragments/YearFragment.kt

@@ -5,9 +5,11 @@ import android.support.v4.app.Fragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import com.simplemobiletools.calendar.Config
 import com.simplemobiletools.calendar.Constants
 import com.simplemobiletools.calendar.NavigationListener
 import com.simplemobiletools.calendar.R
+import com.simplemobiletools.calendar.views.SmallMonthView
 import kotlinx.android.synthetic.main.year_fragment.view.*
 import org.joda.time.DateTime
 
@@ -20,9 +22,21 @@ class YearFragment : Fragment() {
 
         mYear = arguments.getInt(Constants.YEAR_LABEL)
 
-        val days = DateTime().withYear(mYear).withDayOfMonth(1).withMonthOfYear(2).dayOfMonth().maximumValue
+        val dateTime = DateTime().withYear(mYear).withDayOfMonth(1).withMonthOfYear(2).withHourOfDay(12)
+        val days = dateTime.dayOfMonth().maximumValue
         view.month_2.setDays(days)
 
+        val res = resources
+        val sundayFirst = Config.newInstance(context).isSundayFirst
+        for (i in 1..12) {
+            val monthView = view.findViewById(res.getIdentifier("month_" + i, "id", activity.packageName)) as SmallMonthView
+            var dayOfWeek = dateTime.withMonthOfYear(i).dayOfWeek().get()
+            if (!sundayFirst)
+                dayOfWeek--
+
+            monthView.setFirstDay(dayOfWeek)
+        }
+
         return view
     }
 

app/src/main/kotlin/com/simplemobiletools/calendar/views/SmallMonthView.kt

@@ -16,6 +16,7 @@ class SmallMonthView(context: Context, attrs: AttributeSet, defStyle: Int) : Vie
     var mDayWidth = 0f
     var mTextColor = 0
     var mDays = 31
+    var mFirstDay = 0
 
     constructor(context: Context, attrs: AttributeSet) : this(context, attrs, 0) {
     }
@@ -25,6 +26,10 @@ class SmallMonthView(context: Context, attrs: AttributeSet, defStyle: Int) : Vie
         invalidate()
     }
 
+    fun setFirstDay(firstDay: Int) {
+        mFirstDay = firstDay
+    }
+
     init {
         val a = context.theme.obtainStyledAttributes(
                 attrs,
@@ -52,14 +57,14 @@ class SmallMonthView(context: Context, attrs: AttributeSet, defStyle: Int) : Vie
             mDayWidth = (canvas.width / 7).toFloat()
         }
 
-        var curId = 1
+        var curId = 1 - mFirstDay
         for (y in 1..6) {
             for (x in 1..7) {
-                if (curId <= mDays) {
+                if (curId > 0 && curId <= mDays) {
                     canvas.drawText(curId.toString(), x * mDayWidth, y * mDayWidth, mPaint)
+                }
                 curId++
             }
         }
     }
 }
-}