android 日历的 demo 项目

/* * Copyright (C) 2011 Chris Gao <chris@exina.net> * * 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.exina.android.calendar; import java.util.Calendar; import android.content.Context; import android.content.res.Resources; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Rect; import android.graphics.drawable.Drawable; import android.util.AttributeSet; import android.util.MonthDisplayHelper; import android.view.MotionEvent; import android.widget.ImageView; public class CalendarView extends ImageView { private static int WEEK_TOP_MARGIN = 74; private static int WEEK_LEFT_MARGIN = 40; private static int CELL_WIDTH = 58; private static int CELL_HEIGH = 53; private static int CELL_MARGIN_TOP = 0; private static int CELL_MARGIN_LEFT = 39; private static float CELL_TEXT_SIZE; public static final int CURRENT_MOUNT = 0; public static final int NEXT_MOUNT = 1; public static final int PREVIOUS_MOUNT = -1; private static final String TAG = "CalendarView"; private Calendar mRightNow = null; private Drawable mWeekTitle = null; private Cell mToday = null; private Cell[][] mCells = new Cell[6][7]; private OnCellTouchListener mOnCellTouchListener = null; MonthDisplayHelper mHelper; Drawable mDecoration = null; Drawable mDecoraClick = null; private Context context; public interface OnCellTouchListener { public void onTouch(Cell cell); } public CalendarView(Context context) { this(context, null); } public CalendarView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public CalendarView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); this.context = context; mDecoration = context.getResources().getDrawable(R.drawable.typeb_calendar_today); mDecoraClick = context.getResources().getDrawable(R.drawable.typeb_calendar_today); initCalendarView(); } private void initCalendarView() { mRightNow = Calendar.getInstance(); // prepare static vars Resources res = getResources(); WEEK_TOP_MARGIN = (int) res.getDimension(R.dimen.week_top_margin); WEEK_LEFT_MARGIN = (int) res.getDimension(R.dimen.week_left_margin); CELL_WIDTH = (int) res.getDimension(R.dimen.cell_width); CELL_HEIGH = (int) res.getDimension(R.dimen.cell_heigh); CELL_MARGIN_TOP = (int) res.getDimension(R.dimen.cell_margin_top); CELL_MARGIN_LEFT = (int) res.getDimension(R.dimen.cell_margin_left); CELL_TEXT_SIZE = res.getDimension(R.dimen.cell_text_size); // set background setImageResource(R.drawable.background); mWeekTitle = res.getDrawable(R.drawable.calendar_week); mHelper = new MonthDisplayHelper( mRightNow.get(Calendar.YEAR), mRightNow.get(Calendar.MONTH), mRightNow.getFirstDayOfWeek() ); } private void initCells() { class _calendar { public int day; public int whichMonth; // -1 为上月 1为下月 0为此月 public _calendar(int d, int b) { day = d; whichMonth = b; } public _calendar(int d) { // 上个月 默认为 this(d, PREVIOUS_MOUNT); } }; _calendar tmp[][] = new _calendar[6][7]; for(int i=0; i<tmp.length; i++) { int n[] = mHelper.getDigitsForRow(i); for(int d=0; d<n.length; d++) { if(mHelper.isWithinCurrentMonth(i,d)) tmp[i][d] = new _calendar(n[d], CURRENT_MOUNT); else if(i == 0) { tmp[i][d] = new _calendar(n[d]); } else { tmp[i][d] = new _calendar(n[d], NEXT_MOUNT); } } } Calendar today = Calendar.getInstance(); int thisDay = 0; mToday = null; if(mHelper.getYear()==today.get(Calendar.YEAR) && mHelper.getMonth()==today.get(Calendar.MONTH)) { thisDay = today.get(Calendar.DAY_OF_MONTH); } // build cells Rect Bound = new Rect(CELL_MARGIN_LEFT, CELL_MARGIN_TOP, CELL_WIDTH+CELL_MARGIN_LEFT, CELL_HEIGH+CELL_MARGIN_TOP); for(int week=0; week<mCells.length; week++) { for(int day=0; day<mCells[week].length; day++) { if(tmp[week][day].whichMonth == CURRENT_MOUNT) { // 此月 开始设置cell if(day==0 || day==6 ) mCells[week][day] = new RedCell(tmp[week][day].day, new Rect(Bound), CELL_TEXT_SIZE); else mCells[week][day] = new Cell(tmp[week][day].day, new Rect(Bound), CELL_TEXT_SIZE); } else if(tmp[week][day].whichMonth == PREVIOUS_MOUNT) { // 上月为gray mCells[week][day] = new GrayCell(tmp[week][day].day, new Rect(Bound), CELL_TEXT_SIZE); } else { // 下月为LTGray mCells[week][day] = new LTGrayCell(tmp[week][day].day, new Rect(Bound), CELL_TEXT_SIZE); } Bound.offset(CELL_WIDTH, 0); // move to next column // get today if(tmp[week][day].day==thisDay && tmp[week][day].whichMonth == 0) { mToday = mCells[week][day]; mDecoration.setBounds(mToday.getBound()); } } Bound.offset(0, CELL_HEIGH); // move to next row and first column Bound.left = CELL_MARGIN_LEFT; Bound.right = CELL_MARGIN_LEFT+CELL_WIDTH; } } @Override public void onLayout(boolean changed, int left, int top, int right, int bottom) { android.util.Log.d(TAG, "left="+left); Rect re = getDrawable().getBounds(); WEEK_LEFT_MARGIN = CELL_MARGIN_LEFT = (right-left - re.width()) / 2; mWeekTitle.setBounds(WEEK_LEFT_MARGIN, WEEK_TOP_MARGIN, WEEK_LEFT_MARGIN+mWeekTitle.getMinimumWidth(), WEEK_TOP_MARGIN+mWeekTitle.getMinimumHeight()); initCells(); super.onLayout(changed, left, top, right, bottom); } public void setTimeInMillis(long milliseconds) { mRightNow.setTimeInMillis(milliseconds); initCells(); this.invalidate(); } public int getYear() { return mHelper.getYear(); } public int getMonth() { return mHelper.getMonth(); } public void nextMonth() { mHelper.nextMonth(); initCells(); invalidate(); } public void previousMonth() { mHelper.previousMonth(); initCells(); invalidate(); } public boolean firstDay(int day) { return day==1; } public boolean lastDay(int day) { return mHelper.getNumberOfDaysInMonth()==day; } public void goToday() { Calendar cal = Calendar.getInstance(); mHelper = new MonthDisplayHelper(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH)); initCells(); invalidate(); } public Calendar getDate() { return mRightNow; } @Override public boolean onTouchEvent(MotionEvent event) { if(mOnCellTouchListener!=null){ for(Cell[] week : mCells) { for(Cell day : week) { if(day.hitTest((int)event.getX(), (int)event.getY())) { mOnCellTouchListener.onTouch(day); } } } } return super.onTouchEvent(event); } public void setOnCellTouchListener(OnCellTouchListener p) { mOnCellTouchListener = p; } @Override protected void onDraw(Canvas canvas) { // draw background super.onDraw(canvas); mWeekTitle.draw(canvas); // draw cells for(Cell[] week : mCells) { for(Cell day : week) { day.draw(canvas); } } // draw today if