android 自定义日历控件（有图有真相）

不念不忘少年蓝@ 2023-10-18 20:13 21阅读 0赞

有图有真像：

![20130522150855881][]

日历控件View：

**\[java\]** [ view plain][view plain] [copy][view plain] [print][view plain] [?][view plain]

1.  /\*\*
2.   \* 日历控件 功能：获得点选的日期区间
3.   \* 
4.   \*/
5.  public class CalendarView extends View implements View.OnTouchListener \{
6.  private final static String TAG = "anCalendar";
7.  private Date selectedStartDate;
8.  private Date selectedEndDate;
9.  private Date curDate; // 当前日历显示的月 
10. private Date today; // 今天的日期文字显示红色 
11. private Date downDate; // 手指按下状态时临时日期 
12. private Date showFirstDate, showLastDate; // 日历显示的第一个日期和最后一个日期 
13. private int downIndex; // 按下的格子索引 
14. private Calendar calendar;
15. private Surface surface;
16. private int\[\] date = new int\[42\]; // 日历显示数字 
17. private int curStartIndex, curEndIndex; // 当前显示的日历起始的索引 
18. //private boolean completed = false; // 为false表示只选择了开始日期，true表示结束日期也选择了 
19. //给控件设置监听事件 
20. private OnItemClickListener onItemClickListener;
21. 
22. public CalendarView(Context context) \{
23. super(context);
24. init();
25. \}
26. 
27. public CalendarView(Context context, AttributeSet attrs) \{
28. super(context, attrs);
29. init();
30. \}
31. 
32. private void init() \{
33. curDate = selectedStartDate = selectedEndDate = today = new Date();
34. calendar = Calendar.getInstance();
35. calendar.setTime(curDate);
36. surface = new Surface();
37. surface.density = getResources().getDisplayMetrics().density;
38. setBackgroundColor(surface.bgColor);
39. setOnTouchListener(this);
40. \}
41. 
42. @Override
43. protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) \{
44. surface.width = getResources().getDisplayMetrics().widthPixels;
45. surface.height = (int) (getResources().getDisplayMetrics().heightPixels\*2/5);
46. // if (View.MeasureSpec.getMode(widthMeasureSpec) == View.MeasureSpec.EXACTLY) \{ 
47. // surface.width = View.MeasureSpec.getSize(widthMeasureSpec); 
48. // \} 
49. // if (View.MeasureSpec.getMode(heightMeasureSpec) == View.MeasureSpec.EXACTLY) \{ 
50. // surface.height = View.MeasureSpec.getSize(heightMeasureSpec); 
51. // \} 
52. widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(surface.width,
53. View.MeasureSpec.EXACTLY);
54. heightMeasureSpec = View.MeasureSpec.makeMeasureSpec(surface.height,
55. View.MeasureSpec.EXACTLY);
56. setMeasuredDimension(widthMeasureSpec, heightMeasureSpec);
57. super.onMeasure(widthMeasureSpec, heightMeasureSpec);
58. \}
59. 
60. @Override
61. protected void onLayout(boolean changed, int left, int top, int right,
62. int bottom) \{
63. Log.d(TAG, "\[onLayout\] changed:"
64. \+ (changed ? "new size" : "not change") + " left:" \+ left
65. \+ " top:" \+ top + " right:" \+ right + " bottom:" \+ bottom);
66. if (changed) \{
67. surface.init();
68. \}
69. super.onLayout(changed, left, top, right, bottom);
70. \}
71. 
72. @Override
73. protected void onDraw(Canvas canvas) \{
74. Log.d(TAG, "onDraw");
75. // 画框 
76. canvas.drawPath(surface.boxPath, surface.borderPaint);
77. // 年月 
78. //String monthText = getYearAndmonth(); 
79. //float textWidth = surface.monthPaint.measureText(monthText); 
80. //canvas.drawText(monthText, (surface.width - textWidth) / 2f, 
81. // surface.monthHeight \* 3 / 4f, surface.monthPaint); 
82. // 上一月/下一月 
83. //canvas.drawPath(surface.preMonthBtnPath, surface.monthChangeBtnPaint); 
84. //canvas.drawPath(surface.nextMonthBtnPath, surface.monthChangeBtnPaint); 
85. // 星期 
86. float weekTextY = surface.monthHeight + surface.weekHeight \* 3 / 4f;
87. // 星期背景 
88. // surface.cellBgPaint.setColor(surface.textColor); 
89. // canvas.drawRect(surface.weekHeight, surface.width, surface.weekHeight, surface.width, surface.cellBgPaint); 
90. for (int i = 0; i < surface.weekText.length; i++) \{
91. float weekTextX = i
92. \* surface.cellWidth
93. \+ (surface.cellWidth - surface.weekPaint
94. .measureText(surface.weekText\[i\])) / 2f;
95. canvas.drawText(surface.weekText\[i\], weekTextX, weekTextY,
96. surface.weekPaint);
97. \}
98. 
99. // 计算日期 
100. calculateDate();
101. // 按下状态，选择状态背景色 
102. drawDownOrSelectedBg(canvas);
103. // write date number 
104. // today index 
105. int todayIndex = -1;
106. calendar.setTime(curDate);
107. String curYearAndMonth = calendar.get(Calendar.YEAR) + ""
108. \+ calendar.get(Calendar.MONTH);
109. calendar.setTime(today);
110. String todayYearAndMonth = calendar.get(Calendar.YEAR) + ""
111. \+ calendar.get(Calendar.MONTH);
112. if (curYearAndMonth.equals(todayYearAndMonth)) \{
113. int todayNumber = calendar.get(Calendar.DAY\_OF\_MONTH);
114. todayIndex = curStartIndex + todayNumber - 1;
115. \}
116. for (int i = 0; i < 42; i++) \{
117. int color = surface.textColor;
118. if (isLastMonth(i)) \{
119. color = surface.borderColor;
120. \} else if (isNextMonth(i)) \{
121. color = surface.borderColor;
122. \}
123. if (todayIndex != -1 && i == todayIndex) \{
124. color = surface.todayNumberColor;
125. \}
126. drawCellText(canvas, i, date\[i\] + "", color);
127. \}
128. super.onDraw(canvas);
129. \}
130. 
131. private void calculateDate() \{
132. calendar.setTime(curDate);
133. calendar.set(Calendar.DAY\_OF\_MONTH, 1);
134. int dayInWeek = calendar.get(Calendar.DAY\_OF\_WEEK);
135. Log.d(TAG, "day in week:" \+ dayInWeek);
136. int monthStart = dayInWeek;
137. if (monthStart == 1) \{
138. monthStart = 8;
139. \}
140. monthStart -= 1; //以日为开头-1，以星期一为开头-2 
141. curStartIndex = monthStart;
142. date\[monthStart\] = 1;
143. // last month 
144. if (monthStart > 0) \{
145. calendar.set(Calendar.DAY\_OF\_MONTH, 0);
146. int dayInmonth = calendar.get(Calendar.DAY\_OF\_MONTH);
147. for (int i = monthStart - 1; i >= 0; i--) \{
148. date\[i\] = dayInmonth;
149. dayInmonth--;
150. \}
151. calendar.set(Calendar.DAY\_OF\_MONTH, date\[0\]);
152. \}
153. showFirstDate = calendar.getTime();
154. // this month 
155. calendar.setTime(curDate);
156. calendar.add(Calendar.MONTH, 1);
157. calendar.set(Calendar.DAY\_OF\_MONTH, 0);
158. // Log.d(TAG, "m:" + calendar.get(Calendar.MONTH) + " d:" + 
159. // calendar.get(Calendar.DAY\_OF\_MONTH)); 
160. int monthDay = calendar.get(Calendar.DAY\_OF\_MONTH);
161. for (int i = 1; i < monthDay; i++) \{
162. date\[monthStart + i\] = i + 1;
163. \}
164. curEndIndex = monthStart + monthDay;
165. // next month 
166. for (int i = monthStart + monthDay; i < 42; i++) \{
167. date\[i\] = i - (monthStart + monthDay) + 1;
168. \}
169. if (curEndIndex < 42) \{
170. // 显示了下一月的 
171. calendar.add(Calendar.DAY\_OF\_MONTH, 1);
172. \}
173. calendar.set(Calendar.DAY\_OF\_MONTH, date\[41\]);
174. showLastDate = calendar.getTime();
175. \}
176. 
177. /\*\*
178.  \* 
179.  \* @param canvas
180.  \* @param index
181.  \* @param text
182.  \*/
183. private void drawCellText(Canvas canvas, int index, String text, int color) \{
184. int x = getXByIndex(index);
185. int y = getYByIndex(index);
186. surface.datePaint.setColor(color);
187. float cellY = surface.monthHeight + surface.weekHeight + (y - 1)
188. \* surface.cellHeight + surface.cellHeight \* 3 / 4f;
189. float cellX = (surface.cellWidth \* (x - 1))
190. \+ (surface.cellWidth - surface.datePaint.measureText(text))
191. / 2f;
192. canvas.drawText(text, cellX, cellY, surface.datePaint);
193. \}
194. 
195. /\*\*
196.  \* 
197.  \* @param canvas
198.  \* @param index
199.  \* @param color
200.  \*/
201. private void drawCellBg(Canvas canvas, int index, int color) \{
202. int x = getXByIndex(index);
203. int y = getYByIndex(index);
204. surface.cellBgPaint.setColor(color);
205. float left = surface.cellWidth \* (x - 1) + surface.borderWidth;
206. float top = surface.monthHeight + surface.weekHeight + (y - 1)
207. \* surface.cellHeight + surface.borderWidth;
208. canvas.drawRect(left, top, left + surface.cellWidth
209. \- surface.borderWidth, top + surface.cellHeight
210. \- surface.borderWidth, surface.cellBgPaint);
211. \}
212. 
213. private void drawDownOrSelectedBg(Canvas canvas) \{
214. // down and not up 
215. if (downDate != null) \{
216. drawCellBg(canvas, downIndex, surface.cellDownColor);
217. \}
218. // selected bg color 
219. if (!selectedEndDate.before(showFirstDate)
220. && !selectedStartDate.after(showLastDate)) \{
221. int\[\] section = new int\[\] \{ -1, -1 \};
222. calendar.setTime(curDate);
223. calendar.add(Calendar.MONTH, -1);
224. findSelectedIndex(0, curStartIndex, calendar, section);
225. if (section\[1\] == -1) \{
226. calendar.setTime(curDate);
227. findSelectedIndex(curStartIndex, curEndIndex, calendar, section);
228. \}
229. if (section\[1\] == -1) \{
230. calendar.setTime(curDate);
231. calendar.add(Calendar.MONTH, 1);
232. findSelectedIndex(curEndIndex, 42, calendar, section);
233. \}
234. if (section\[0\] == -1) \{
235. section\[0\] = 0;
236. \}
237. if (section\[1\] == -1) \{
238. section\[1\] = 41;
239. \}
240. for (int i = section\[0\]; i <= section\[1\]; i++) \{
241. drawCellBg(canvas, i, surface.cellSelectedColor);
242. \}
243. \}
244. \}
245. 
246. private void findSelectedIndex(int startIndex, int endIndex,
247. Calendar calendar, int\[\] section) \{
248. for (int i = startIndex; i < endIndex; i++) \{
249. calendar.set(Calendar.DAY\_OF\_MONTH, date\[i\]);
250. Date temp = calendar.getTime();
251. // Log.d(TAG, "temp:" + temp.toLocaleString()); 
252. if (temp.compareTo(selectedStartDate) == 0) \{
253. section\[0\] = i;
254. \}
255. if (temp.compareTo(selectedEndDate) == 0) \{
256. section\[1\] = i;
257. return;
258. \}
259. \}
260. \}
261. 
262. public Date getSelectedStartDate() \{
263. return selectedStartDate;
264. \}
265. 
266. public Date getSelectedEndDate() \{
267. return selectedEndDate;
268. \}
269. 
270. private boolean isLastMonth(int i) \{
271. if (i < curStartIndex) \{
272. return true;
273. \}
274. return false;
275. \}
276. 
277. private boolean isNextMonth(int i) \{
278. if (i >= curEndIndex) \{
279. return true;
280. \}
281. return false;
282. \}
283. 
284. private int getXByIndex(int i) \{
285. return i % 7 \+ 1; // 1 2 3 4 5 6 7 
286. \}
287. 
288. private int getYByIndex(int i) \{
289. return i / 7 \+ 1; // 1 2 3 4 5 6 
290. \}
291. 
292. // 获得当前应该显示的年月 
293. public String getYearAndmonth() \{
294. calendar.setTime(curDate);
295. int year = calendar.get(Calendar.YEAR);
296. int month = calendar.get(Calendar.MONTH);
297. return year + "-" \+ surface.monthText\[month\];
298. \}
299. 
300. //上一月 
301. public String clickLeftMonth()\{
302. calendar.setTime(curDate);
303. calendar.add(Calendar.MONTH, -1);
304. curDate = calendar.getTime();
305. invalidate();
306. return getYearAndmonth();
307. \}
308. //下一月 
309. public String clickRightMonth()\{
310. calendar.setTime(curDate);
311. calendar.add(Calendar.MONTH, 1);
312. curDate = calendar.getTime();
313. invalidate();
314. return getYearAndmonth();
315. \}
316. 
317. private void setSelectedDateByCoor(float x, float y) \{
318. // change month 
319. // if (y < surface.monthHeight) \{ 
320. // // pre month 
321. // if (x < surface.monthChangeWidth) \{ 
322. // calendar.setTime(curDate); 
323. // calendar.add(Calendar.MONTH, -1); 
324. // curDate = calendar.getTime(); 
325. // \} 
326. // // next month 
327. // else if (x > surface.width - surface.monthChangeWidth) \{ 
328. // calendar.setTime(curDate); 
329. // calendar.add(Calendar.MONTH, 1); 
330. // curDate = calendar.getTime(); 
331. // \} 
332. // \} 
333. // cell click down 
334. if (y > surface.monthHeight + surface.weekHeight) \{
335. int m = (int) (Math.floor(x / surface.cellWidth) + 1);
336. int n = (int) (Math
337. .floor((y - (surface.monthHeight + surface.weekHeight))
338. / Float.valueOf(surface.cellHeight)) + 1);
339. downIndex = (n - 1) \* 7 \+ m - 1;
340. Log.d(TAG, "downIndex:" \+ downIndex);
341. calendar.setTime(curDate);
342. if (isLastMonth(downIndex)) \{
343. calendar.add(Calendar.MONTH, -1);
344. \} else if (isNextMonth(downIndex)) \{
345. calendar.add(Calendar.MONTH, 1);
346. \}
347. calendar.set(Calendar.DAY\_OF\_MONTH, date\[downIndex\]);
348. downDate = calendar.getTime();
349. \}
350. invalidate();
351. \}
352. 
353. @Override
354. public boolean onTouch(View v, MotionEvent event) \{
355. switch (event.getAction()) \{
356. case MotionEvent.ACTION\_DOWN:
357. setSelectedDateByCoor(event.getX(), event.getY());
358. break;
359. case MotionEvent.ACTION\_UP:
360. if (downDate != null) \{
361. // if (!completed) \{ 
362. // if (downDate.before(selectedStartDate)) \{ 
363. // selectedEndDate = selectedStartDate; 
364. // selectedStartDate = downDate; 
365. // \} else \{ 
366. // selectedEndDate = downDate; 
367. // \} 
368. // completed = true; 
369. // \} else \{ 
370. // selectedStartDate = selectedEndDate = downDate; 
371. // completed = false; 
372. // \} 
373. selectedStartDate = selectedEndDate = downDate;
374. //响应监听事件 
375. onItemClickListener.OnItemClick(selectedStartDate);
376. // Log.d(TAG, "downdate:" + downDate.toLocaleString()); 
377. //Log.d(TAG, "start:" + selectedStartDate.toLocaleString()); 
378. //Log.d(TAG, "end:" + selectedEndDate.toLocaleString()); 
379. downDate = null;
380. invalidate();
381. \}
382. break;
383. \}
384. return true;
385. \}
386. 
387. //给控件设置监听事件 
388. public void setOnItemClickListener(OnItemClickListener onItemClickListener)\{
389. this.onItemClickListener = onItemClickListener;
390. \}
391. //监听接口 
392. public interface OnItemClickListener \{
393. void OnItemClick(Date date);
394. \}
395. 
396. /\*\*
397.  \* 
398.  \* 1. 布局尺寸 2. 文字颜色，大小 3. 当前日期的颜色，选择的日期颜色
399.  \*/
400. private class Surface \{
401. public float density;
402. public int width; // 整个控件的宽度 
403. public int height; // 整个控件的高度 
404. public float monthHeight; // 显示月的高度 
405. //public float monthChangeWidth; // 上一月、下一月按钮宽度 
406. public float weekHeight; // 显示星期的高度 
407. public float cellWidth; // 日期方框宽度 
408. public float cellHeight; // 日期方框高度 
409. public float borderWidth;
410. public int bgColor = Color.parseColor("\#FFFFFF");
411. private int textColor = Color.BLACK;
412. //private int textColorUnimportant = Color.parseColor("\#666666"); 
413. private int btnColor = Color.parseColor("\#666666");
414. private int borderColor = Color.parseColor("\#CCCCCC");
415. public int todayNumberColor = Color.RED;
416. public int cellDownColor = Color.parseColor("\#CCFFFF");
417. public int cellSelectedColor = Color.parseColor("\#99CCFF");
418. public Paint borderPaint;
419. public Paint monthPaint;
420. public Paint weekPaint;
421. public Paint datePaint;
422. public Paint monthChangeBtnPaint;
423. public Paint cellBgPaint;
424. public Path boxPath; // 边框路径 
425. //public Path preMonthBtnPath; // 上一月按钮三角形 
426. //public Path nextMonthBtnPath; // 下一月按钮三角形 
427. public String\[\] weekText = \{ "Sun","Mon", "Tue", "Wed", "Thu", "Fri", "Sat"\};
428. public String\[\] monthText = \{ "Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"\};
429. 
430. public void init() \{
431. float temp = height / 7f;
432. monthHeight = 0;//(float) ((temp + temp \* 0.3f) \* 0.6); 
433. //monthChangeWidth = monthHeight \* 1.5f; 
434. weekHeight = (float) ((temp + temp \* 0.3f) \* 0.7);
435. cellHeight = (height - monthHeight - weekHeight) / 6f;
436. cellWidth = width / 7f;
437. borderPaint = new Paint();
438. borderPaint.setColor(borderColor);
439. borderPaint.setStyle(Paint.Style.STROKE);
440. borderWidth = (float) (0.5 \* density);
441. // Log.d(TAG, "borderwidth:" + borderWidth); 
442. borderWidth = borderWidth < 1 ? 1 : borderWidth;
443. borderPaint.setStrokeWidth(borderWidth);
444. monthPaint = new Paint();
445. monthPaint.setColor(textColor);
446. monthPaint.setAntiAlias(true);
447. float textSize = cellHeight \* 0.4f;
448. Log.d(TAG, "text size:" \+ textSize);
449. monthPaint.setTextSize(textSize);
450. monthPaint.setTypeface(Typeface.DEFAULT\_BOLD);
451. weekPaint = new Paint();
452. weekPaint.setColor(textColor);
453. weekPaint.setAntiAlias(true);
454. float weekTextSize = weekHeight \* 0.6f;
455. weekPaint.setTextSize(weekTextSize);
456. weekPaint.setTypeface(Typeface.DEFAULT\_BOLD);
457. datePaint = new Paint();
458. datePaint.setColor(textColor);
459. datePaint.setAntiAlias(true);
460. float cellTextSize = cellHeight \* 0.5f;
461. datePaint.setTextSize(cellTextSize);
462. datePaint.setTypeface(Typeface.DEFAULT\_BOLD);
463. boxPath = new Path();
464. //boxPath.addRect(0, 0, width, height, Direction.CW); 
465. //boxPath.moveTo(0, monthHeight); 
466. boxPath.rLineTo(width, 0);
467. boxPath.moveTo(0, monthHeight + weekHeight);
468. boxPath.rLineTo(width, 0);
469. for (int i = 1; i < 6; i++) \{
470. boxPath.moveTo(0, monthHeight + weekHeight + i \* cellHeight);
471. boxPath.rLineTo(width, 0);
472. boxPath.moveTo(i \* cellWidth, monthHeight);
473. boxPath.rLineTo(0, height - monthHeight);
474. \}
475. boxPath.moveTo(6 \* cellWidth, monthHeight);
476. boxPath.rLineTo(0, height - monthHeight);
477. //preMonthBtnPath = new Path(); 
478. //int btnHeight = (int) (monthHeight \* 0.6f); 
479. //preMonthBtnPath.moveTo(monthChangeWidth / 2f, monthHeight / 2f); 
480. //preMonthBtnPath.rLineTo(btnHeight / 2f, -btnHeight / 2f); 
481. //preMonthBtnPath.rLineTo(0, btnHeight); 
482. //preMonthBtnPath.close(); 
483. //nextMonthBtnPath = new Path(); 
484. //nextMonthBtnPath.moveTo(width - monthChangeWidth / 2f, 
485. // monthHeight / 2f); 
486. //nextMonthBtnPath.rLineTo(-btnHeight / 2f, -btnHeight / 2f); 
487. //nextMonthBtnPath.rLineTo(0, btnHeight); 
488. //nextMonthBtnPath.close(); 
489. monthChangeBtnPaint = new Paint();
490. monthChangeBtnPaint.setAntiAlias(true);
491. monthChangeBtnPaint.setStyle(Paint.Style.FILL\_AND\_STROKE);
492. monthChangeBtnPaint.setColor(btnColor);
493. cellBgPaint = new Paint();
494. cellBgPaint.setAntiAlias(true);
495. cellBgPaint.setStyle(Paint.Style.FILL);
496. cellBgPaint.setColor(cellSelectedColor);
497. \}
498. \}
499. \}

/**
     * 日历控件 功能：获得点选的日期区间
     * 
     */
    public class CalendarView extends View implements View.OnTouchListener {
    	private final static String TAG = "anCalendar";
    	private Date selectedStartDate;
    	private Date selectedEndDate;
    	private Date curDate; // 当前日历显示的月
    	private Date today; // 今天的日期文字显示红色
    	private Date downDate; // 手指按下状态时临时日期
    	private Date showFirstDate, showLastDate; // 日历显示的第一个日期和最后一个日期
    	private int downIndex; // 按下的格子索引
    	private Calendar calendar;
    	private Surface surface;
    	private int[] date = new int[42]; // 日历显示数字
    	private int curStartIndex, curEndIndex; // 当前显示的日历起始的索引
    	//private boolean completed = false; // 为false表示只选择了开始日期，true表示结束日期也选择了
    	//给控件设置监听事件
    	private OnItemClickListener onItemClickListener;
    	
    	public CalendarView(Context context) {
    		super(context);
    		init();
    	}
    
    	public CalendarView(Context context, AttributeSet attrs) {
    		super(context, attrs);
    		init();
    	}
    
    	private void init() {
    		curDate = selectedStartDate = selectedEndDate = today = new Date();
    		calendar = Calendar.getInstance();
    		calendar.setTime(curDate);
    		surface = new Surface();
    		surface.density = getResources().getDisplayMetrics().density;
    		setBackgroundColor(surface.bgColor);
    		setOnTouchListener(this);
    	}
    
    	@Override
    	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    		surface.width = getResources().getDisplayMetrics().widthPixels;
    		surface.height = (int) (getResources().getDisplayMetrics().heightPixels*2/5);
    //		if (View.MeasureSpec.getMode(widthMeasureSpec) == View.MeasureSpec.EXACTLY) {
    //			surface.width = View.MeasureSpec.getSize(widthMeasureSpec);
    //		}
    //		if (View.MeasureSpec.getMode(heightMeasureSpec) == View.MeasureSpec.EXACTLY) {
    //			surface.height = View.MeasureSpec.getSize(heightMeasureSpec);
    //		}
    		widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(surface.width,
    				View.MeasureSpec.EXACTLY);
    		heightMeasureSpec = View.MeasureSpec.makeMeasureSpec(surface.height,
    				View.MeasureSpec.EXACTLY);
    		setMeasuredDimension(widthMeasureSpec, heightMeasureSpec);
    		super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    	}
    
    	@Override
    	protected void onLayout(boolean changed, int left, int top, int right,
    			int bottom) {
    		Log.d(TAG, "[onLayout] changed:"
    				+ (changed ? "new size" : "not change") + " left:" + left
    				+ " top:" + top + " right:" + right + " bottom:" + bottom);
    		if (changed) {
    			surface.init();
    		}
    		super.onLayout(changed, left, top, right, bottom);
    	}
    
    	@Override
    	protected void onDraw(Canvas canvas) {
    		Log.d(TAG, "onDraw");
    		// 画框
    		canvas.drawPath(surface.boxPath, surface.borderPaint);
    		// 年月
    		//String monthText = getYearAndmonth();
    		//float textWidth = surface.monthPaint.measureText(monthText);
    		//canvas.drawText(monthText, (surface.width - textWidth) / 2f,
    		//		surface.monthHeight * 3 / 4f, surface.monthPaint);
    		// 上一月/下一月
    		//canvas.drawPath(surface.preMonthBtnPath, surface.monthChangeBtnPaint);
    		//canvas.drawPath(surface.nextMonthBtnPath, surface.monthChangeBtnPaint);
    		// 星期
    		float weekTextY = surface.monthHeight + surface.weekHeight * 3 / 4f;
    		// 星期背景
    //		surface.cellBgPaint.setColor(surface.textColor);
    //		canvas.drawRect(surface.weekHeight, surface.width, surface.weekHeight, surface.width, surface.cellBgPaint);
    		for (int i = 0; i < surface.weekText.length; i++) {
    			float weekTextX = i
    					* surface.cellWidth
    					+ (surface.cellWidth - surface.weekPaint
    							.measureText(surface.weekText[i])) / 2f;
    			canvas.drawText(surface.weekText[i], weekTextX, weekTextY,
    					surface.weekPaint);
    		}
    		
    		// 计算日期
    		calculateDate();
    		// 按下状态，选择状态背景色
    		drawDownOrSelectedBg(canvas);
    		// write date number
    		// today index
    		int todayIndex = -1;
    		calendar.setTime(curDate);
    		String curYearAndMonth = calendar.get(Calendar.YEAR) + ""
    				+ calendar.get(Calendar.MONTH);
    		calendar.setTime(today);
    		String todayYearAndMonth = calendar.get(Calendar.YEAR) + ""
    				+ calendar.get(Calendar.MONTH);
    		if (curYearAndMonth.equals(todayYearAndMonth)) {
    			int todayNumber = calendar.get(Calendar.DAY_OF_MONTH);
    			todayIndex = curStartIndex + todayNumber - 1;
    		}
    		for (int i = 0; i < 42; i++) {
    			int color = surface.textColor;
    			if (isLastMonth(i)) {
    				color = surface.borderColor;
    			} else if (isNextMonth(i)) {
    				color = surface.borderColor;
    			}
    			if (todayIndex != -1 && i == todayIndex) {
    				color = surface.todayNumberColor;
    			}
    			drawCellText(canvas, i, date[i] + "", color);
    		}
    		super.onDraw(canvas);
    	}
    
    	private void calculateDate() {
    		calendar.setTime(curDate);
    		calendar.set(Calendar.DAY_OF_MONTH, 1);
    		int dayInWeek = calendar.get(Calendar.DAY_OF_WEEK);
    		Log.d(TAG, "day in week:" + dayInWeek);
    		int monthStart = dayInWeek;
    		if (monthStart == 1) {
    			monthStart = 8;
    		}
    		monthStart -= 1;  //以日为开头-1，以星期一为开头-2
    		curStartIndex = monthStart;
    		date[monthStart] = 1;
    		// last month
    		if (monthStart > 0) {
    			calendar.set(Calendar.DAY_OF_MONTH, 0);
    			int dayInmonth = calendar.get(Calendar.DAY_OF_MONTH);
    			for (int i = monthStart - 1; i >= 0; i--) {
    				date[i] = dayInmonth;
    				dayInmonth--;
    			}
    			calendar.set(Calendar.DAY_OF_MONTH, date[0]);
    		}
    		showFirstDate = calendar.getTime();
    		// this month
    		calendar.setTime(curDate);
    		calendar.add(Calendar.MONTH, 1);
    		calendar.set(Calendar.DAY_OF_MONTH, 0);
    		// Log.d(TAG, "m:" + calendar.get(Calendar.MONTH) + " d:" +
    		// calendar.get(Calendar.DAY_OF_MONTH));
    		int monthDay = calendar.get(Calendar.DAY_OF_MONTH);
    		for (int i = 1; i < monthDay; i++) {
    			date[monthStart + i] = i + 1;
    		}
    		curEndIndex = monthStart + monthDay;
    		// next month
    		for (int i = monthStart + monthDay; i < 42; i++) {
    			date[i] = i - (monthStart + monthDay) + 1;
    		}
    		if (curEndIndex < 42) {
    			// 显示了下一月的
    			calendar.add(Calendar.DAY_OF_MONTH, 1);
    		}
    		calendar.set(Calendar.DAY_OF_MONTH, date[41]);
    		showLastDate = calendar.getTime();
    	}
    
    	/**
    	 * 
    	 * @param canvas
    	 * @param index
    	 * @param text
    	 */
    	private void drawCellText(Canvas canvas, int index, String text, int color) {
    		int x = getXByIndex(index);
    		int y = getYByIndex(index);
    		surface.datePaint.setColor(color);
    		float cellY = surface.monthHeight + surface.weekHeight + (y - 1)
    				* surface.cellHeight + surface.cellHeight * 3 / 4f;
    		float cellX = (surface.cellWidth * (x - 1))
    				+ (surface.cellWidth - surface.datePaint.measureText(text))
    				/ 2f;
    		canvas.drawText(text, cellX, cellY, surface.datePaint);
    	}
    
    	/**
    	 * 
    	 * @param canvas
    	 * @param index
    	 * @param color
    	 */
    	private void drawCellBg(Canvas canvas, int index, int color) {
    		int x = getXByIndex(index);
    		int y = getYByIndex(index);
    		surface.cellBgPaint.setColor(color);
    		float left = surface.cellWidth * (x - 1) + surface.borderWidth;
    		float top = surface.monthHeight + surface.weekHeight + (y - 1)
    				* surface.cellHeight + surface.borderWidth;
    		canvas.drawRect(left, top, left + surface.cellWidth
    				- surface.borderWidth, top + surface.cellHeight
    				- surface.borderWidth, surface.cellBgPaint);
    	}
    
    	private void drawDownOrSelectedBg(Canvas canvas) {
    		// down and not up
    		if (downDate != null) {
    			drawCellBg(canvas, downIndex, surface.cellDownColor);
    		}
    		// selected bg color
    		if (!selectedEndDate.before(showFirstDate)
    				&& !selectedStartDate.after(showLastDate)) {
    			int[] section = new int[] { -1, -1 };
    			calendar.setTime(curDate);
    			calendar.add(Calendar.MONTH, -1);
    			findSelectedIndex(0, curStartIndex, calendar, section);
    			if (section[1] == -1) {
    				calendar.setTime(curDate);
    				findSelectedIndex(curStartIndex, curEndIndex, calendar, section);
    			}
    			if (section[1] == -1) {
    				calendar.setTime(curDate);
    				calendar.add(Calendar.MONTH, 1);
    				findSelectedIndex(curEndIndex, 42, calendar, section);
    			}
    			if (section[0] == -1) {
    				section[0] = 0;
    			}
    			if (section[1] == -1) {
    				section[1] = 41;
    			}
    			for (int i = section[0]; i <= section[1]; i++) {
    				drawCellBg(canvas, i, surface.cellSelectedColor);
    			}
    		}
    	}
    
    	private void findSelectedIndex(int startIndex, int endIndex,
    			Calendar calendar, int[] section) {
    		for (int i = startIndex; i < endIndex; i++) {
    			calendar.set(Calendar.DAY_OF_MONTH, date[i]);
    			Date temp = calendar.getTime();
    			// Log.d(TAG, "temp:" + temp.toLocaleString());
    			if (temp.compareTo(selectedStartDate) == 0) {
    				section[0] = i;
    			}
    			if (temp.compareTo(selectedEndDate) == 0) {
    				section[1] = i;
    				return;
    			}
    		}
    	}
    
    	public Date getSelectedStartDate() {
    		return selectedStartDate;
    	}
    
    	public Date getSelectedEndDate() {
    		return selectedEndDate;
    	}
    
    	private boolean isLastMonth(int i) {
    		if (i < curStartIndex) {
    			return true;
    		}
    		return false;
    	}
    
    	private boolean isNextMonth(int i) {
    		if (i >= curEndIndex) {
    			return true;
    		}
    		return false;
    	}
    
    	private int getXByIndex(int i) {
    		return i % 7 + 1; // 1 2 3 4 5 6 7
    	}
    
    	private int getYByIndex(int i) {
    		return i / 7 + 1; // 1 2 3 4 5 6
    	}
    
    	// 获得当前应该显示的年月
    	public String getYearAndmonth() {
    		calendar.setTime(curDate);
    		int year = calendar.get(Calendar.YEAR);
    		int month = calendar.get(Calendar.MONTH);
    		return year + "-" + surface.monthText[month];
    	}
    	
    	//上一月
    	public String clickLeftMonth(){
    		calendar.setTime(curDate);
    		calendar.add(Calendar.MONTH, -1);
    		curDate = calendar.getTime();
    		invalidate();
    		return getYearAndmonth();
    	}
    	//下一月
    	public String clickRightMonth(){
    		calendar.setTime(curDate);
    		calendar.add(Calendar.MONTH, 1);
    		curDate = calendar.getTime();
    		invalidate();
    		return getYearAndmonth();
    	}
    
    	private void setSelectedDateByCoor(float x, float y) {
    		// change month
    //		if (y < surface.monthHeight) {
    //			// pre month
    //			if (x < surface.monthChangeWidth) {
    //				calendar.setTime(curDate);
    //				calendar.add(Calendar.MONTH, -1);
    //				curDate = calendar.getTime();
    //			}
    //			// next month
    //			else if (x > surface.width - surface.monthChangeWidth) {
    //				calendar.setTime(curDate);
    //				calendar.add(Calendar.MONTH, 1);
    //				curDate = calendar.getTime();
    //			}
    //		}
    		// cell click down
    		if (y > surface.monthHeight + surface.weekHeight) {
    			int m = (int) (Math.floor(x / surface.cellWidth) + 1);
    			int n = (int) (Math
    					.floor((y - (surface.monthHeight + surface.weekHeight))
    							/ Float.valueOf(surface.cellHeight)) + 1);
    			downIndex = (n - 1) * 7 + m - 1;
    			Log.d(TAG, "downIndex:" + downIndex);
    			calendar.setTime(curDate);
    			if (isLastMonth(downIndex)) {
    				calendar.add(Calendar.MONTH, -1);
    			} else if (isNextMonth(downIndex)) {
    				calendar.add(Calendar.MONTH, 1);
    			}
    			calendar.set(Calendar.DAY_OF_MONTH, date[downIndex]);
    			downDate = calendar.getTime();
    		}
    		invalidate();
    	}
    
    	@Override
    	public boolean onTouch(View v, MotionEvent event) {
    		switch (event.getAction()) {
    		case MotionEvent.ACTION_DOWN:
    			setSelectedDateByCoor(event.getX(), event.getY());
    			break;
    		case MotionEvent.ACTION_UP:
    			if (downDate != null) {
    //				if (!completed) {
    //					if (downDate.before(selectedStartDate)) {
    //						selectedEndDate = selectedStartDate;
    //						selectedStartDate = downDate;
    //					} else {
    //						selectedEndDate = downDate;
    //					}
    //					completed = true;
    //				} else {
    //					selectedStartDate = selectedEndDate = downDate;
    //					completed = false;
    //				}
    				selectedStartDate = selectedEndDate = downDate;
    				//响应监听事件
    				onItemClickListener.OnItemClick(selectedStartDate);
    				// Log.d(TAG, "downdate:" + downDate.toLocaleString());
    				//Log.d(TAG, "start:" + selectedStartDate.toLocaleString());
    				//Log.d(TAG, "end:" + selectedEndDate.toLocaleString());
    				downDate = null;
    				invalidate();
    			}
    			break;
    		}
    		return true;
    	}
    	
    	//给控件设置监听事件
    	public void setOnItemClickListener(OnItemClickListener onItemClickListener){
    		this.onItemClickListener =  onItemClickListener;
    	}
    	//监听接口
    	public interface OnItemClickListener {
    		void OnItemClick(Date date);
    	}
    
    	/**
    	 * 
    	 * 1. 布局尺寸 2. 文字颜色，大小 3. 当前日期的颜色，选择的日期颜色
    	 */
    	private class Surface {
    		public float density;
    		public int width; // 整个控件的宽度
    		public int height; // 整个控件的高度
    		public float monthHeight; // 显示月的高度
    		//public float monthChangeWidth; // 上一月、下一月按钮宽度
    		public float weekHeight; // 显示星期的高度
    		public float cellWidth; // 日期方框宽度
    		public float cellHeight; // 日期方框高度	
    		public float borderWidth;
    		public int bgColor = Color.parseColor("#FFFFFF");
    		private int textColor = Color.BLACK;
    		//private int textColorUnimportant = Color.parseColor("#666666");
    		private int btnColor = Color.parseColor("#666666");
    		private int borderColor = Color.parseColor("#CCCCCC");
    		public int todayNumberColor = Color.RED;
    		public int cellDownColor = Color.parseColor("#CCFFFF");
    		public int cellSelectedColor = Color.parseColor("#99CCFF");
    		public Paint borderPaint;
    		public Paint monthPaint;
    		public Paint weekPaint;
    		public Paint datePaint;
    		public Paint monthChangeBtnPaint;
    		public Paint cellBgPaint;
    		public Path boxPath; // 边框路径
    		//public Path preMonthBtnPath; // 上一月按钮三角形
    		//public Path nextMonthBtnPath; // 下一月按钮三角形
    		public String[] weekText = { "Sun","Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
    		public String[] monthText = {"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};
    		   
    		public void init() {
    			float temp = height / 7f;
    			monthHeight = 0;//(float) ((temp + temp * 0.3f) * 0.6);
    			//monthChangeWidth = monthHeight * 1.5f;
    			weekHeight = (float) ((temp + temp * 0.3f) * 0.7);
    			cellHeight = (height - monthHeight - weekHeight) / 6f;
    			cellWidth = width / 7f;
    			borderPaint = new Paint();
    			borderPaint.setColor(borderColor);
    			borderPaint.setStyle(Paint.Style.STROKE);
    			borderWidth = (float) (0.5 * density);
    			// Log.d(TAG, "borderwidth:" + borderWidth);
    			borderWidth = borderWidth < 1 ? 1 : borderWidth;
    			borderPaint.setStrokeWidth(borderWidth);
    			monthPaint = new Paint();
    			monthPaint.setColor(textColor);
    			monthPaint.setAntiAlias(true);
    			float textSize = cellHeight * 0.4f;
    			Log.d(TAG, "text size:" + textSize);
    			monthPaint.setTextSize(textSize);
    			monthPaint.setTypeface(Typeface.DEFAULT_BOLD);
    			weekPaint = new Paint();
    			weekPaint.setColor(textColor);
    			weekPaint.setAntiAlias(true);
    			float weekTextSize = weekHeight * 0.6f;
    			weekPaint.setTextSize(weekTextSize);
    			weekPaint.setTypeface(Typeface.DEFAULT_BOLD);
    			datePaint = new Paint();
    			datePaint.setColor(textColor);
    			datePaint.setAntiAlias(true);
    			float cellTextSize = cellHeight * 0.5f;
    			datePaint.setTextSize(cellTextSize);
    			datePaint.setTypeface(Typeface.DEFAULT_BOLD);
    			boxPath = new Path();
    			//boxPath.addRect(0, 0, width, height, Direction.CW);
    			//boxPath.moveTo(0, monthHeight);
    			boxPath.rLineTo(width, 0);
    			boxPath.moveTo(0, monthHeight + weekHeight);
    			boxPath.rLineTo(width, 0);
    			for (int i = 1; i < 6; i++) {
    				boxPath.moveTo(0, monthHeight + weekHeight + i * cellHeight);
    				boxPath.rLineTo(width, 0);
    				boxPath.moveTo(i * cellWidth, monthHeight);
    				boxPath.rLineTo(0, height - monthHeight);
    			}
    			boxPath.moveTo(6 * cellWidth, monthHeight);
    			boxPath.rLineTo(0, height - monthHeight);
    			//preMonthBtnPath = new Path();
    			//int btnHeight = (int) (monthHeight * 0.6f);
    			//preMonthBtnPath.moveTo(monthChangeWidth / 2f, monthHeight / 2f);
    			//preMonthBtnPath.rLineTo(btnHeight / 2f, -btnHeight / 2f);
    			//preMonthBtnPath.rLineTo(0, btnHeight);
    			//preMonthBtnPath.close();
    			//nextMonthBtnPath = new Path();
    			//nextMonthBtnPath.moveTo(width - monthChangeWidth / 2f,
    			//		monthHeight / 2f);
    			//nextMonthBtnPath.rLineTo(-btnHeight / 2f, -btnHeight / 2f);
    			//nextMonthBtnPath.rLineTo(0, btnHeight);
    			//nextMonthBtnPath.close();
    			monthChangeBtnPaint = new Paint();
    			monthChangeBtnPaint.setAntiAlias(true);
    			monthChangeBtnPaint.setStyle(Paint.Style.FILL_AND_STROKE);
    			monthChangeBtnPaint.setColor(btnColor);
    			cellBgPaint = new Paint();
    			cellBgPaint.setAntiAlias(true);
    			cellBgPaint.setStyle(Paint.Style.FILL);
    			cellBgPaint.setColor(cellSelectedColor);
    		}
    	}
    }

实现日历控件：

**\[html\]** [ view plain][view plain] [copy][view plain] [print][view plain] [?][view plain]

1.  <com.techrare.view.CalendarView
2.  android:id="@+id/calendar"
3.  android:layout\_width="fill\_parent"
4.  android:layout\_height="fill\_parent" />

<com.techrare.view.CalendarView
                android:id="@+id/calendar"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent" />

日历控件中的一些功能（可以自己加）：

**\[java\]** [ view plain][view plain] [copy][view plain] [print][view plain] [?][view plain]

1.  //获取日历控件对象 
2.  calendar = (CalendarView)findViewById(R.id.calendar);
3.  //获取日历中年月 ya\[0\]为年，ya\[1\]为月（格式大家可以自行在日历控件中改） 
4.  String\[\] ya = calendar.getYearAndmonth().split("-");
5.  //上一月 同样返回年月 
6.  String leftYearAndmonth = calendar.clickLeftMonth();
7.  String\[\] lya = leftYearAndmonth.split("-");
8.  //下一月 
9.  String rightYearAndmonth = calendar.clickRightMonth();
10. String\[\] rya = rightYearAndmonth.split("-");
11. //设置控件监听，可以监听到点击的每一天（大家也可以在控件中自行设定） 
12. calendar.setOnItemClickListener(new calendarItemClickListener());
13. class calendarItemClickListener implements OnItemClickListener\{
14. @Override
15. public void OnItemClick(Date date) \{
16. Toast.makeText(getApplicationContext(), date+"", Toast.LENGTH\_SHORT).show();
17. \}
18. \}

//获取日历控件对象
    calendar = (CalendarView)findViewById(R.id.calendar);
    //获取日历中年月 ya[0]为年，ya[1]为月（格式大家可以自行在日历控件中改）
    String[] ya = calendar.getYearAndmonth().split("-"); 
    //上一月 同样返回年月 
    String leftYearAndmonth = calendar.clickLeftMonth(); 
    String[] lya = leftYearAndmonth.split("-");
    //下一月
    String rightYearAndmonth = calendar.clickRightMonth(); 
    String[] rya = rightYearAndmonth.split("-");
    //设置控件监听，可以监听到点击的每一天（大家也可以在控件中自行设定）
    calendar.setOnItemClickListener(new calendarItemClickListener());
    class calendarItemClickListener implements OnItemClickListener{
    	@Override
    	public void OnItemClick(Date date) {
    		Toast.makeText(getApplicationContext(), date+"", Toast.LENGTH_SHORT).show();
    	}
     }

这些功能只是配合项目中的需要来添加的，大家如有其他需求，可以自行在控件中添加，应该也不怎么困难！

[20130522150855881]: https://img-blog.csdn.net/20130522150855881
[view plain]: http://blog.csdn.net/h7870181/article/details/8960478#