public class CalendarView extends Activity {
public Calendar month, itemmonth;// calendar instances.
public CalendarAdapter adapter;// adapter instance
public Handler handler;// for grabbing some event values for showing the dot
// marker.
public ArrayList<String> items; // container to store calendar items which
// needs showing the event marker
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.calendar);
month = Calendar.getInstance();
itemmonth = (Calendar) month.clone();
items = new ArrayList<String>();
adapter = new CalendarAdapter(this, month);
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(adapter);
handler = new Handler();
handler.post(calendarUpdater);
TextView title = (TextView) findViewById(R.id.title);
title.setText(android.text.format.DateFormat.format("MMMM yyyy", month));
RelativeLayout previous = (RelativeLayout) findViewById(R.id.previous);
previous.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
setPreviousMonth();
refreshCalendar();
}
});
RelativeLayout next = (RelativeLayout) findViewById(R.id.next);
next.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
setNextMonth();
refreshCalendar();
}
});
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
((CalendarAdapter) parent.getAdapter()).setSelected(v);
String selectedGridDate = CalendarAdapter.dayString
.get(position);
String[] separatedTime = selectedGridDate.split("-");
String gridvalueString = separatedTime[2].replaceFirst("^0*",
"");// taking last part of date. ie; 2 from 2012-12-02.
int gridvalue = Integer.parseInt(gridvalueString);
// navigate to next or previous month on clicking offdays.
if ((gridvalue > 10) && (position < 8)) {
setPreviousMonth();
refreshCalendar();
} else if ((gridvalue < 7) && (position > 28)) {
setNextMonth();
refreshCalendar();
}
((CalendarAdapter) parent.getAdapter()).setSelected(v);
showToast(selectedGridDate);
}
});
}
protected void setNextMonth() {
if (month.get(Calendar.MONTH) == month.getActualMaximum(Calendar.MONTH)) {
month.set((month.get(Calendar.YEAR) + 1),
month.getActualMinimum(Calendar.MONTH), 1);
} else {
month.set(Calendar.MONTH, month.get(Calendar.MONTH) + 1);
}
}
protected void setPreviousMonth() {
if (month.get(Calendar.MONTH) == month.getActualMinimum(Calendar.MONTH)) {
month.set((month.get(Calendar.YEAR) - 1),
month.getActualMaximum(Calendar.MONTH), 1);
} else {
month.set(Calendar.MONTH, month.get(Calendar.MONTH) - 1);
}
}<br/>
protected void showToast(String string) {<br/>
Toast.makeText(this, string, Toast.LENGTH_SHORT).show();<br/>
}<br/>
public void refreshCalendar() {<br/>
TextView title = (TextView) findViewById(R.id.title);<br/>
adapter.refreshDays();<br/>
adapter.notifyDataSetChanged();<br/>
handler.post(calendarUpdater); // generate some calendar items<br/>
title.setText(android.text.format.DateFormat.format("MMMM yyyy", month));
}
public Runnable calendarUpdater = new Runnable() {
@Override
public void run() {
items.clear();
// Print dates of the current week
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
String itemvalue;
for (int i = 0; i < 7; i++) {
itemvalue = df.format(itemmonth.getTime());
itemmonth.add(Calendar.DATE, 1);
items.add("2012-09-12");
items.add("2012-10-07");
items.add("2012-10-15");
items.add("2012-10-20");
items.add("2012-11-30");
items.add("2012-11-28");
}
adapter.setItems(items);
adapter.notifyDataSetChanged();
}
};
}
//Adapter class
public class CalendarAdapter extends BaseAdapter {
private Context mContext;
private java.util.Calendar month;
public Calendar pmonth; // calendar instance for previous month
/**
* calendar instance for previous month for getting complete view
*/
public Calendar pmonthmaxset;
private Calendar selectedDate;
int firstDay;
int maxWeeknumber;
int maxP;
int calMaxP;
int lastWeekDay;
int leftDays;
int mnthlength;
String itemvalue, curentDateString;
DateFormat df;
private ArrayList<String> items;
public static List<String> dayString;
private View previousView;
// private List<String> mnthString;
public CalendarAdapter(Context c, Calendar monthCalendar) {
CalendarAdapter.dayString = new ArrayList<String>();
month = monthCalendar;
pmonth = (Calendar) month.clone();
selectedDate = (Calendar) monthCalendar.clone();
mContext = c;
month.set(Calendar.DAY_OF_MONTH, 1);
this.items = new ArrayList<String>();
df = new SimpleDateFormat("yyyy-MM-dd");
curentDateString = df.format(selectedDate.getTime());
refreshDays();
}
public void setItems(ArrayList<String> items) {
for (int i = 0; i != items.size(); i++) {
if (items.get(i).length() == 1) {
items.set(i, "0" + items.get(i));
}
}
this.items = items;
}
public int getCount() {
return dayString.size();
}
public Object getItem(int position) {
return dayString.get(position);
}
public long getItemId(int position) {
return 0;
}
// create a new view for each item referenced by the Adapter<br/>
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
TextView dayView;
if (convertView == null) { // if it's not recycled, initialize some
// attributes
LayoutInflater vi = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.calendar_item, null);
}
dayView = (TextView) v.findViewById(R.id.date);
// separates daystring into parts.
String[] separatedTime = dayString.get(position).split("-");
// taking last part of date. ie; 2 from 2012-12-02
String gridvalue = separatedTime[2].replaceFirst("^0*", "");
// checking whether the day is in current month or not.
if ((Integer.parseInt(gridvalue) > 1) && (position < firstDay)) {
// setting offdays to white color.
dayView.setTextColor(Color.WHITE);
dayView.setClickable(false);
dayView.setFocusable(false);
// i++;
} else if ((Integer.parseInt(gridvalue) < 7) && (position > 28)) {
dayView.setTextColor(Color.WHITE);
dayView.setClickable(false);
dayView.setFocusable(false);
// i++;
} else {
// setting curent month's days in blue color.
dayView.setTextColor(Color.BLUE);
}
if (da<br/>yString.get(position).equals(curentDateString)) {
setSelected(v);
previousView = v;
} else {
v.setBackgroundResource(R.drawable.list_item_background);
}
dayView.setText(gridvalue);
// create date string for comparison
String date = dayString.get(position);
if (date.length() == 1) {
date = "0" + date;
}
String monthStr = "" + (month.get(Calendar.MONTH) + 1);
if (monthStr.length() == 1) {
monthStr = "0" + monthStr;
}
// show icon if date is not empty and it exists in the items array
ImageView iw = (ImageView) v.findViewById(R.id.date_icon);
if (date.length() > 0 && items != null && items.contains(date)) {
iw.setVisibility(View.VISIBLE);
} else {
iw.setVisibility(View.INVISIBLE);
}
return v;
}
public View setSelected(View view) {
if (previousView != null) {
previousView.setBackgroundResource(R.drawable.list_item_background);
}
previousView = view;
view.setBackgroundResource(R.drawable.calendar_cel_selectl);
return view;
}
public void refreshDays() {
// clear items
items.clear();
dayString.clear();
// month start day. ie; sun, mon, etc
firstDay = month.get(Calendar.DAY_OF_WEEK);
// finding number of weeks in current month.
maxWeeknumber = month.getActualMaximum(Calendar.WEEK_OF_MONTH);
// allocating maximum row number for the gridview.
mnthlength = maxWeeknumber * 7;
maxP = getMaxP(); // previous month maximum day 31,30....
calMaxP = maxP - (firstDay - 1);// calendar offday starting 24,25 ...
/**
* Calendar instance for getting a complete gridview including the <br/>three<br/>
* month's (previous,current,next) dates.
pmonthmaxset = (Calendar) pmonth.clone();
/**
* setting the start date as previous month's required date.
*/<br/>
pmonthmaxset.set(Calendar.DATE, calMaxP + 1);
/**<br/>
* filling calendar gridview.<br/>
*/<br/>
for (int n = 0; n < mnthlength; n++) {
itemvalue = df.format(pmonthmaxset.getTime());
pmonthmaxset.add(Calendar.DATE, 1);
dayString.add(itemvalue);
}
}
private int getMaxP() {
int maxP;
if (month.get(Calendar.MONTH) == month.getActualMinimum(Calendar.MONTH)) {
pmonth.set((month.get(Calendar.YEAR) - 1),
month.getActualMaximum(Calendar.MONTH), 1);
} else {
pmonth.set(Calendar.MONTH, month.get(Calendar.MONTH) - 1);
}
maxP = pmonth.getActualMaximum(Calendar.DAY_OF_MONTH);
Log.i("", "maxP is : "+maxP);
Log.e("", "calendar month is : "+Calendar.MONTH);
return maxP;
}
}
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