+package net.ktnx.mobileledger;
+
+import android.annotation.TargetApi;
+import android.app.DatePickerDialog;
+import android.app.Dialog;
+import android.os.Build;
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.v7.app.AppCompatDialogFragment;
+import android.widget.DatePicker;
+import android.widget.TextView;
+
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+import java.util.Locale;
+import java.util.Objects;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class DatePickerFragment extends AppCompatDialogFragment
+implements DatePickerDialog.OnDateSetListener
+{
+ @NonNull
+ @Override
+ public Dialog onCreateDialog(Bundle savedInstanceState) {
+ final Calendar c = GregorianCalendar.getInstance();
+ int year = c.get(GregorianCalendar.YEAR);
+ int month = c.get(GregorianCalendar.MONTH);
+ int day = c.get(GregorianCalendar.DAY_OF_MONTH);
+ TextView date = getActivity().findViewById(R.id.new_transaction_date);
+
+ CharSequence present = date.getText();
+
+ Pattern re_mon_day = Pattern.compile("^\\s*(\\d+)\\s*/\\s*(\\d+)\\s*$");
+ Matcher m_mon_day = re_mon_day.matcher(present);
+
+ if (m_mon_day.matches()) {
+ month = Integer.parseInt(m_mon_day.group(0));
+ day = Integer.parseInt(m_mon_day.group(1));
+ }
+ else {
+ Pattern re_day = Pattern.compile("^\\s*(\\d{1,2})\\s*$");
+ Matcher m_day = re_day.matcher(present);
+ if (m_day.matches()) {
+ day = Integer.parseInt(m_day.group(0));
+ }
+ }
+
+ return new DatePickerDialog(Objects.requireNonNull(getActivity()), this, year, month, day);
+ }
+
+ @TargetApi(Build.VERSION_CODES.O)
+ public void onDateSet(DatePicker view, int year, int month, int day) {
+ TextView date = getActivity().findViewById(R.id.new_transaction_date);
+
+ final Calendar c = GregorianCalendar.getInstance();
+ if ( c.get(GregorianCalendar.YEAR) == year && c.get(GregorianCalendar.MONTH) == month) {
+ date.setText(String.format(Locale.US, "%d", day));
+ }
+ else {
+ date.setText(String.format(Locale.US, "%d/%d", month, day));
+ }
+ }
+}