[fix] add missing files

Author: Martijn Swaagman

android/src/main/java/com/reactcommunity/rndatetimepicker/RNConstants.java

@@ -0,0 +1,18 @@
+package com.reactcommunity.rndatetimepicker;
+
+public final class RNConstants {
+  public static final String ERROR_NO_ACTIVITY = "E_NO_ACTIVITY";
+  public static final String ARG_VALUE = "value";
+  public static final String ARG_MINDATE = "minimumDate";
+  public static final String ARG_MAXDATE = "maximumDate";
+  public static final String ARG_IS24HOUR = "is24Hour";
+  public static final String ARG_MODE = "mode";
+  public static final String ACTION_DATE_SET = "dateSetAction";
+  public static final String ACTION_TIME_SET = "timeSetAction";
+  public static final String ACTION_DISMISSED = "dismissedAction";
+
+  /**
+   * Minimum date supported by {@link DatePicker}, 01 Jan 1900
+   */
+  public static final long DEFAULT_MIN_DATE = -2208988800001l;
+}

android/src/main/java/com/reactcommunity/rndatetimepicker/RNDate.java

@@ -0,0 +1,26 @@
+package com.reactcommunity.rndatetimepicker;
+
+import java.util.Calendar;
+import android.os.Bundle;
+
+public class RNDate {
+  private Calendar now;
+
+  public RNDate(Bundle args) {
+    now = Calendar.getInstance();
+
+    if (args != null && args.containsKey(RNConstants.ARG_VALUE)) {
+      set(args.getLong(RNConstants.ARG_VALUE));
+    }
+  }
+
+  public void set(long value) {
+    now.setTimeInMillis(value);
+  }
+
+  public int year() { return now.get(Calendar.YEAR); }
+  public int month() { return now.get(Calendar.MONTH); }
+  public int day() { return now.get(Calendar.DAY_OF_MONTH); }
+  public int hour() { return now.get(Calendar.HOUR_OF_DAY); }
+  public int minute() { return now.get(Calendar.MINUTE); }
+}