CalendarView.java

package eoc.studio.voicecard.calendarview;

import java.util.Locale;

import eoc.studio.voicecard.R;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.os.SystemClock;
import android.support.v4.app.Fragment;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.GridView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.ViewSwitcher;

public class CalendarView extends Fragment implements OnTouchListener, OnClickListener
{
    private static Context mContext;
    private static Locale locale;
    private ViewSwitcher calendarSwitcher;
    private static TextView currentMonth;
    private static CalendarAdapter calendarAdapter;
    private GestureDetector swipeDetector;
    private static GridView calendarGrid;

    // //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    public CalendarView()
    {
        locale = Locale.getDefault();
    }

    // //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    @Override
    public void onResume()
    {
        super.onResume();
        mContext = getActivity();
        updateCurrentMonth();
        // getNewView();
    }

    // //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    @Override
    public void onDestroy()
    {
        super.onDestroy();
        DateProcess.mCalendar.setTimeInMillis(System.currentTimeMillis());
        calendarAdapter = null;
        SystemClock.sleep(200);
    }

    // //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        mContext = getActivity();
        final RelativeLayout calendarLayout = (RelativeLayout) inflater.inflate(R.layout.calendar_view, null);
        calendarGrid = (GridView) calendarLayout.findViewById(R.id.calendar_grid);
        final Button nextMonth = (Button) calendarLayout.findViewById(R.id.next_month);
        final Button prevMonth = (Button) calendarLayout.findViewById(R.id.previous_month);
        swipeDetector = new GestureDetector(getActivity(), new SwipeGesture(getActivity()));
        calendarSwitcher = (ViewSwitcher) calendarLayout.findViewById(R.id.calendar_switcher);
        currentMonth = (TextView) calendarLayout.findViewById(R.id.current_month);
        //
        nextMonth.setOnClickListener(this);
        prevMonth.setOnClickListener(this);
        getNewView();
        calendarGrid.setOnTouchListener(this);
        calendarGrid.setOnItemClickListener(new DayItemClickListener());
        return calendarLayout;
    }

    // //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    protected static void getNewView()
    {
        calendarAdapter = new CalendarAdapter(mContext, DateProcess.mCalendar);
        updateCurrentMonth();
        calendarGrid.setSelector(new ColorDrawable(Color.TRANSPARENT));
        calendarGrid.setAdapter(calendarAdapter);
    }

    // //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    @Override
    public boolean onTouch(View v, MotionEvent event)
    {
        return swipeDetector.onTouchEvent(event);
    }

    // //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    protected static void updateCurrentMonth()
    {
        calendarAdapter.refreshDays();
        currentMonth.setText(DateProcess.getYear() + "-" + String.format(locale, "%tB", DateProcess.mCalendar));
    }

    // //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    private final class DayItemClickListener implements OnItemClickListener
    {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id)
        {
            Intent SetCalendarMainView = new Intent();
            SetCalendarMainView.setClass(getActivity(), SetCalendarMainView.class);
            Bundle bundle = new Bundle();
            bundle.putString(DataProcess.EVENT_DATE, calendarAdapter.setSelected(position));
            SetCalendarMainView.putExtras(bundle);
            getActivity().startActivity(SetCalendarMainView);
            getActivity().overridePendingTransition(0, 0);
        }
    }

    // //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    protected final void onNextMonth()
    {
        calendarSwitcher.setInAnimation(getActivity(), R.anim.in_from_right);
        calendarSwitcher.setOutAnimation(getActivity(), R.anim.out_to_left);
        calendarSwitcher.showNext();
        DateProcess.setNextMonthCalendar();
        updateCurrentMonth();
    }

    // //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    protected final void onPreviousMonth()
    {
        calendarSwitcher.setInAnimation(getActivity(), R.anim.in_from_left);
        calendarSwitcher.setOutAnimation(getActivity(), R.anim.out_to_right);
        calendarSwitcher.showPrevious();
        DateProcess.setPreviousMonthCalendar();
        updateCurrentMonth();
    }

    // //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    @Override
    public void onClick(View view)
    {
        switch (view.getId())
        {
            case R.id.next_month:
            {
                onNextMonth();
            }
                break;
            case R.id.previous_month:
            {
                onPreviousMonth();
            }
                break;
        }
    }

    // //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    private final class SwipeGesture extends SimpleOnGestureListener
    {
        private final int swipeMinDistance;
        private final int swipeThresholdVelocity;

        public SwipeGesture(Context context)
        {
            final ViewConfiguration viewConfig = ViewConfiguration.get(context);
            swipeMinDistance = viewConfig.getScaledTouchSlop();
            swipeThresholdVelocity = viewConfig.getScaledMinimumFlingVelocity();
        }

        @Override
        public boolean onFling(MotionEvent me1, MotionEvent me2, float velocityX, float velocityY)
        {
            if (me1.getX() - me2.getX() > swipeMinDistance && Math.abs(velocityX) > swipeThresholdVelocity)
            {
                onNextMonth();
            }
            else if (me2.getX() - me1.getX() > swipeMinDistance && Math.abs(velocityX) > swipeThresholdVelocity)
            {
                onPreviousMonth();
            }
            return true;
        }
    }
    // //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
}