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CalendarView.java
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CalendarView.java
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/*
* Copyright 2011 Lauri Nevala.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.examples.android.calendar;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Random;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.TextView;
public class CalendarView extends Activity {
public Calendar month;
public CalendarAdapter adapter;
public Handler handler;
public ArrayList<String> items; // container to store some random calendar items
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.calendar);
month = Calendar.getInstance();
onNewIntent(getIntent());
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));
TextView previous = (TextView) findViewById(R.id.previous);
previous.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
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);
}
refreshCalendar();
}
});
TextView next = (TextView) findViewById(R.id.next);
next.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
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);
}
refreshCalendar();
}
});
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
TextView date = (TextView)v.findViewById(R.id.date);
if(date instanceof TextView && !date.getText().equals("")) {
Intent intent = new Intent();
String day = date.getText().toString();
if(day.length()==1) {
day = "0"+day;
}
// return chosen date as string format
intent.putExtra("date", android.text.format.DateFormat.format("yyyy-MM", month)+"-"+day);
setResult(RESULT_OK, intent);
finish();
}
}
});
}
public void refreshCalendar()
{
TextView title = (TextView) findViewById(R.id.title);
adapter.refreshDays();
adapter.notifyDataSetChanged();
handler.post(calendarUpdater); // generate some random calendar items
title.setText(android.text.format.DateFormat.format("MMMM yyyy", month));
}
public void onNewIntent(Intent intent) {
String date = intent.getStringExtra("date");
String[] dateArr = date.split("-"); // date format is yyyy-mm-dd
month.set(Integer.parseInt(dateArr[0]), Integer.parseInt(dateArr[1]), Integer.parseInt(dateArr[2]));
}
public Runnable calendarUpdater = new Runnable() {
@Override
public void run() {
items.clear();
// format random values. You can implement a dedicated class to provide real values
for(int i=0;i<31;i++) {
Random r = new Random();
if(r.nextInt(10)>6)
{
items.add(Integer.toString(i));
}
}
adapter.setItems(items);
adapter.notifyDataSetChanged();
}
};
}