Android Open Source - MoonCal Month Picker Fragment

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.example.mooncal;
/*from  w ww . j a va2s .  c  o m*/
import java.lang.reflect.Field;
import java.util.Calendar;

import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.widget.DatePicker;

public class MonthPickerFragment extends DialogFragment implements OnDateSetListener {
  private OnMonthPickedListener delegate;
  private int month=Calendar.getInstance().get(Calendar.MONTH);
  private int year=Calendar.getInstance().get(Calendar.DAY_OF_MONTH);
  private boolean dateActuallySet=false;
  public OnMonthPickedListener getOnMonthPickedListener() {
    return delegate;
  }
  public void setOnMonthPickedListener(OnMonthPickedListener listener) {
    delegate=listener;
  }
  public void setMonth(int month, int year) {
    this.month=month;
    this.year=year;
  }
  @Override
  public Dialog onCreateDialog(Bundle savedInstanceState) {
    Dialog picker=createMonthPickerDialog();
    return picker;
  }

  private DatePickerDialog createMonthPickerDialog() {
    DatePickerDialog dpd=new DatePickerDialog(getActivity(),this,year,month,1);
    DatePicker datePicker=dpd.getDatePicker();
    dpd.setTitle("");
    
    if(Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
      // Following try block does not work on Android L; does not harm it though
      try {
        Field[] datePickerFields=datePicker.getClass().getDeclaredFields();
        for(Field datePickerField: datePickerFields) {
          if("mDaySpinner".equals(datePickerField.getName())) {
            datePickerField.setAccessible(true);
            View dayPicker=(View) datePickerField.get(datePicker);
            dayPicker.setVisibility(View.GONE);
          }
        }
      } catch (Exception e) {
        // ignore
      }
      // Workaround Jelly Bean and KitKat DatePickerDialog behavior
      // The bug seems to be fixed in the Lollipop, but the change resulted in
      // another erroneous behavior when the workaround is there
      dpd.setButton(DialogInterface.BUTTON_POSITIVE, 
          getResources().getString(android.R.string.ok),
          new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
          dateActuallySet=true;
        }
      });
    }
    
    datePicker.setCalendarViewShown(false);
    return dpd;
  }

  @Override
  public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
    if(null!=delegate && 
        // JellyBean and KitKat bug workaround
        ((Build.VERSION.SDK_INT>=Build.VERSION_CODES.LOLLIPOP) || dateActuallySet)) {
      delegate.onMonthPicked(year, monthOfYear);
    }
  }
  public interface OnMonthPickedListener {
    public void onMonthPicked(int year, int monthOfYear);
  }
}

Java Source Code List

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