如何在Android中实现自定义日历？
我想制作一个自定义日历，以便我可以轻松添加或删除事件。任何人都可以为我提供代码如何实现它。
我提供了一个链接： - 就像我想要制作一个日历
1 个答案:
答案 0 :(得分：1)
你应该搜索足够的并展示一些努力。 以下是您可以尝试的示例
package com.examples;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.List;
import java.util.Locale;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;
public class Main extends Activity implements OnClickListener
{
private static final String tag = "Main";
private Button selectedDayMonthYearButton;
private Button currentMonth;
private ImageView prevMonth;
private ImageView nextMonth;
private GridView calendarView;
private GridCellAdapter adapter;
private Calendar _calendar;
private int month, year;
private void getRequestParameters()
{
Intent intent = getIntent();
if (intent != null)
{
Bundle extras = intent.getExtras();
if (extras != null)
{
if (extras != null)
{
Log.d(tag, "+++++----------------->" + extras.getString("params"));
}
}
}
}
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
_calendar = Calendar.getInstance(Locale.getDefault());
month = _calendar.get(Calendar.MONTH);
year = _calendar.get(Calendar.YEAR);
selectedDayMonthYearButton = (Button) this.findViewById(R.id.selectedDayMonthYear);
prevMonth = (ImageView) this.findViewById(R.id.prevMonth);
prevMonth.setOnClickListener(this);
currentMonth = (Button) this.findViewById(R.id.currentMonth);
currentMonth.setText(_calendar.getTime().toString());
nextMonth = (ImageView) this.findViewById(R.id.nextMonth);
nextMonth.setOnClickListener(this);
calendarView = (GridView) this.findViewById(R.id.calendar);
// Initialised
adapter = new GridCellAdapter(getApplicationContext(), R.id.gridcell, month, year);
adapter.notifyDataSetChanged();
calendarView.setAdapter(adapter);
}
@Override
public void onClick(View v)
{
if (v == prevMonth)
{
if (month <= 1)
{
month = 11;
year--;
} else
{
month--;
}
Log.d(tag, "Before 1 MONTH " + "Month: " + month + " " + "Year: " + year);
adapter = new GridCellAdapter(getApplicationContext(), R.id.gridcell, month, year);
_calendar.set(year, month, _calendar.get(Calendar.DAY_OF_MONTH));
currentMonth.setText(_calendar.getTime().toString());
adapter.notifyDataSetChanged();
calendarView.setAdapter(adapter);
}
if (v == nextMonth)
{
if (month >= 11)
{
month = 0;
year++;
} else
{
month++;
}
Log.d(tag, "After 1 MONTH " + "Month: " + month + " " + "Year: " + year);
adapter = new GridCellAdapter(getApplicationContext(), R.id.gridcell, month, year);
_calendar.set(year, month, _calendar.get(Calendar.DAY_OF_MONTH));
currentMonth.setText(_calendar.getTime().toString());
adapter.notifyDataSetChanged();
calendarView.setAdapter(adapter);
}
}
//
public class GridCellAdapter extends BaseAdapter implements OnClickListener
{
private static final String tag = "GridCellAdapter";
private final Context _context;
private final List<String> list;
private final String[] weekdays = new String[] { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
private final String[] months = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };
private final int[] daysOfMonth = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
private final int month, year;
int daysInMonth, prevMonthDays;
private final int currentDayOfMonth;
private Button gridcell;
// Days in Current Month
public GridCellAdapter(Context context, int textViewResourceId, int month, int year)
{
super();
this._context = context;
this.list = new ArrayList<String>();
this.month = month;
this.year = year;
Log.d(tag, "Month: " + month + " " + "Year: " + year);
Calendar calendar = Calendar.getInstance();
currentDayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);
printMonth(month, year);
}
public String getItem(int position)
{
return list.get(position);
}
@Override
public int getCount()
{
return list.size();
}
private void printMonth(int mm, int yy)
{
// The number of days to leave blank at
// the start of this month.
int trailingSpaces = 0;
int leadSpaces = 0;
int daysInPrevMonth = 0;
int prevMonth = 0;
int prevYear = 0;
int nextMonth = 0;
int nextYear = 0;
GregorianCalendar cal = new GregorianCalendar(yy, mm, currentDayOfMonth);
// Days in Current Month
daysInMonth = daysOfMonth[mm];
int currentMonth = mm;
if (currentMonth == 11)
{
prevMonth = 10;
daysInPrevMonth = daysOfMonth[prevMonth];
nextMonth = 0;
prevYear = yy;
nextYear = yy + 1;
} else if (currentMonth == 0)
{
prevMonth = 11;
prevYear = yy - 1;
nextYear = yy;
daysInPrevMonth = daysOfMonth[prevMonth];
nextMonth = 1;
} else
{
prevMonth = currentMonth - 1;
nextMonth = currentMonth + 1;
nextYear = yy;
prevYear = yy;
daysInPrevMonth = daysOfMonth[prevMonth];
}
// Compute how much to leave before before the first day of the
// month.
// getDay() returns 0 for Sunday.
trailingSpaces = cal.get(Calendar.DAY_OF_WEEK) - 1;
if (cal.isLeapYear(cal.get(Calendar.YEAR)) && mm == 1)
{
++daysInMonth;
}
// Trailing Month days
for (int i = 0; i < trailingSpaces; i++)
{
list.add(String.valueOf((daysInPrevMonth - trailingSpaces + 1) + i) + "-GREY" + "-" + months[prevMonth] + "-" + prevYear);
}
// Current Month Days
for (int i = 1; i <= daysInMonth; i++)
{
list.add(String.valueOf(i) + "-WHITE" + "-" + months[mm] + "-" + yy);
}
// Leading Month days
for (int i = 0; i < list.size() % 7; i++)
{
Log.d(tag, "NEXT MONTH:= " + months[nextMonth]);
list.add(String.valueOf(i + 1) + "-GREY" + "-" + months[nextMonth] + "-" + nextYear);
}
}
@Override
public long getItemId(int position)
{
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
Log.d(tag, "getView ...");
View row = convertView;
if (row == null)
{
// ROW INFLATION
Log.d(tag, "Starting XML Row Inflation ... ");
LayoutInflater inflater = (LayoutInflater) _context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.gridcell, parent, false);
Log.d(tag, "Successfully completed XML Row Inflation!");
}
gridcell = (Button) row.findViewById(R.id.gridcell);
gridcell.setOnClickListener(this);
// ACCOUNT FOR SPACING
Log.d(tag, "Current Day: " + currentDayOfMonth);
String[] day_color = list.get(position).split("-");
gridcell.setText(day_color[0]);
gridcell.setTag(day_color[0] + "-" + day_color[2] + "-" + day_color[3]);
if (day_color[1].equals("GREY"))
{
gridcell.setTextColor(Color.LTGRAY);
}
if (day_color[1].equals("WHITE"))
{
gridcell.setTextColor(Color.WHITE);
}
if (position == currentDayOfMonth)
{
gridcell.setTextColor(Color.BLUE);
}
return row;
}
@Override
public void onClick(View view)
{
String date_month_year = (String) view.getTag();
Toast.makeText(getApplicationContext(), date_month_year, Toast.LENGTH_SHORT).show();
}
}
}
<强> gridcell.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<Button
android:id="@+id/gridcell"
android:layout_gravity="center"
android:textColor="#FFFFFF"
android:background="@drawable/calendar_button_selector"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</Button>
</LinearLayout>
<强> main.xml中
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/bg">
<ImageView
android:id="@+id/addJournalEntry"
android:src="@drawable/add_journal_icon"
android:gravity="left"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ImageView>
<Button
android:id="@+id/selectedDayMonthYear"
android:textColor="#FFFFFF"
android:textAppearance="?android:attr/textAppearanceMedium"
android:background="@drawable/button_blue_background"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</Button>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/prevMonth"
android:src="@drawable/left_cal_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ImageView>
<Button
android:id="@+id/currentMonth"
android:layout_weight="0.8"
android:textColor="#FFFFFF"
android:textAppearance="?android:attr/textAppearanceMedium"
android:background="@drawable/button_blue_background"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</Button>
<ImageView
android:id="@+id/nextMonth"
android:src="@drawable/right_cal_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ImageView>
</LinearLayout>
<GridView
android:id="@+id/calendar"
android:horizontalSpacing="-1px"
android:verticalSpacing="-1px"
android:numColumns="7"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</GridView>
</LinearLayout>
您需要一些可以添加的drawable用于测试。我提供了一些重要的信息。其他你可以添加一些测试图像并尝试它。
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