app/src/main/java/net/ktnx/mobileledger/DatePickerFragment.java

   1 package net.ktnx.mobileledger;
   2
   3 import android.annotation.TargetApi;
   4 import android.app.DatePickerDialog;
   5 import android.app.Dialog;
   6 import android.os.Build;
   7 import android.os.Bundle;
   8 import android.support.annotation.NonNull;
   9 import android.support.v7.app.AppCompatDialogFragment;
  10 import android.util.Log;
  11 import android.widget.DatePicker;
  12 import android.widget.TextView;
  13
  14 import java.util.Calendar;
  15 import java.util.GregorianCalendar;
  16 import java.util.Locale;
  17 import java.util.Objects;
  18 import java.util.regex.Matcher;
  19 import java.util.regex.Pattern;
  20
  21 public class DatePickerFragment extends AppCompatDialogFragment
  22 implements DatePickerDialog.OnDateSetListener, DatePicker.OnDateChangedListener
  23 {
  24     @NonNull
  25     @Override
  26     public Dialog onCreateDialog(Bundle savedInstanceState) {
  27         final Calendar c = GregorianCalendar.getInstance();
  28         int year = c.get(GregorianCalendar.YEAR);
  29         int month = c.get(GregorianCalendar.MONTH);
  30         int day = c.get(GregorianCalendar.DAY_OF_MONTH);
  31         TextView date = Objects.requireNonNull(getActivity()).findViewById(R.id.new_transaction_date);
  32
  33         CharSequence present = date.getText();
  34
  35         Pattern re_mon_day = Pattern.compile("^\\s*(\\d+)\\s*/\\s*(\\d+)\\s*$");
  36         Matcher m_mon_day = re_mon_day.matcher(present);
  37
  38         if (m_mon_day.matches()) {
  39             month = Integer.parseInt(m_mon_day.group(1))-1;
  40             day = Integer.parseInt(m_mon_day.group(2));
  41         }
  42         else {
  43             Pattern re_day = Pattern.compile("^\\s*(\\d{1,2})\\s*$");
  44             Matcher m_day = re_day.matcher(present);
  45             if (m_day.matches()) {
  46                 day = Integer.parseInt(m_day.group(1));
  47             }
  48         }
  49
  50         DatePickerDialog dpd =  new DatePickerDialog(Objects.requireNonNull(getActivity()), this, year, month, day);
  51         // quicker date selection available in API 26
  52         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
  53             DatePicker dp = dpd.getDatePicker();
  54             dp.setOnDateChangedListener(this);
  55         }
  56
  57         return dpd;
  58     }
  59
  60     @TargetApi(Build.VERSION_CODES.O)
  61     public void onDateSet(DatePicker view, int year, int month, int day) {
  62         TextView date = Objects.requireNonNull(getActivity()).findViewById(R.id.new_transaction_date);
  63
  64         final Calendar c = GregorianCalendar.getInstance();
  65         if ( c.get(GregorianCalendar.YEAR) == year && c.get(GregorianCalendar.MONTH) == month) {
  66             date.setText(String.format(Locale.US, "%d", day));
  67         }
  68         else {
  69             date.setText(String.format(Locale.US, "%d/%d", month+1, day));
  70         }
  71
  72         TextView description = Objects.requireNonNull(getActivity())
  73                 .findViewById(R.id.new_transaction_description);
  74         description.requestFocus();
  75     }
  76
  77     @Override
  78     public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
  79         TextView date = Objects.requireNonNull(getActivity()).findViewById(R.id.new_transaction_date);
  80
  81         final Calendar c = GregorianCalendar.getInstance();
  82         if ( c.get(GregorianCalendar.YEAR) == year && c.get(GregorianCalendar.MONTH) == monthOfYear) {
  83             date.setText(String.format(Locale.US, "%d", dayOfMonth));
  84         }
  85         else {
  86             date.setText(String.format(Locale.US, "%d/%d", monthOfYear+1, dayOfMonth));
  87         }
  88
  89         TextView description = Objects.requireNonNull(getActivity())
  90                 .findViewById(R.id.new_transaction_description);
  91         description.requestFocus();
  92
  93         this.dismiss();
  94     }
  95 }