Android 日历方式显示的日期选择组件.doc
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Android
日历方式显示的日期选择组件
日历
方式
显示
日期
选择
组件
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Android 日历方式显示的日期选择组件
此Widget组件只包含五个类文件:
•DateWidget
•DateWidgetDayCell
•DateWidgetDayHeader
•DayStyle
•SymbolButton
*红色为启动的activity
DateWidget.java:
Java代码
1.package com.iaiai;
2.
3.import java.text.SimpleDateFormat;
4.import java.util.ArrayList;
5.import java.util.Calendar;
6.
7.import android.app.Activity;
8.import android.os.Bundle;
9.import android.view.Gravity;
10.import android.view.View;
11.import android.widget.Button;
12.import android.widget.LinearLayout;
13.import android.widget.LinearLayout.LayoutParams;
14.import android.widget.TextView;
15.
37.public class DateWidget extends Activity {
38. private ArrayList days = new ArrayList();
39. // private SimpleDateFormat dateMonth = new SimpleDateFormat("MMMM yyyy");
40. private Calendar calStartDate = Calendar.getInstance();
41. private Calendar calToday = Calendar.getInstance();
42. private Calendar calCalendar = Calendar.getInstance();
43. private Calendar calSelected = Calendar.getInstance();
44. LinearLayout layContent = null;
45. Button btnPrev = null;
46. Button btnToday = null;
47. Button btnNext = null;
48. private int iFirstDayOfWeek = Calendar.MONDAY;
49. private int iMonthViewCurrentMonth = 0;
50. private int iMonthViewCurrentYear = 0;
51. public static final int SELECT_DATE_REQUEST = 111;
52. private static final int iDayCellSize = 38;
53. private static final int iDayHeaderHeight = 24;
54. private static final int iTotalWidth = (iDayCellSize * 7);
55. private TextView tv;
56. private int mYear;
57. private int mMonth;
58. private int mDay;
59.
60. @Override
61. public void onCreate(Bundle icicle) {
62. super.onCreate(icicle);
63. iFirstDayOfWeek = Calendar.MONDAY;
64. mYear = calSelected.get(Calendar.YEAR);
65. mMonth = calSelected.get(Calendar.MONTH);
66. mDay = calSelected.get(Calendar.DAY_OF_MONTH);
67. setContentView(generateContentView());
68. calStartDate = getCalendarStartDate();
69. DateWidgetDayCell daySelected = updateCalendar();
70. updateControlsState();
71. if (daySelected != null)
72. daySelected.requestFocus();
73. }
74.
75. @Override
76. public void onStart() {
77. super.onStart();
78.
79. }
80.
81. private LinearLayout createLayout(int iOrientation) {
82. LinearLayout lay = new LinearLayout(this);
83. lay.setLayoutParams(new LayoutParams(
84. android.view.ViewGroup.LayoutParams.FILL_PARENT,
85. android.view.ViewGroup.LayoutParams.WRAP_CONTENT));
86. lay.setOrientation(iOrientation);
87. return lay;
88. }
89.
90. private Button createButton(String sText, int iWidth, int iHeight) {
91. Button btn = new Button(this);
92. btn.setText(sText);
93. btn.setLayoutParams(new LayoutParams(iWidth, iHeight));
94. return btn;
95. }
96.
97. private void generateTopButtons(LinearLayout layTopControls) {
98. final int iHorPadding = 24;
99. final int iSmallButtonWidth = 60;
100. btnToday = createButton("", iTotalWidth - iSmallButtonWidth
101. - iSmallButtonWidth,
102. android.view.ViewGroup.LayoutParams.WRAP_CONTENT);
103. btnToday.setPadding(iHorPadding, btnToday.getPaddingTop(), iHorPadding,
104. btnToday.getPaddingBottom());
105. btnToday.setBackgroundResource(android.R.drawable.btn_default_small);
106.
107. SymbolButton btnPrev = new SymbolButton(this,
108. SymbolButton.symbol.arrowLeft);
109. btnPrev.setLayoutParams(new LayoutParams(iSmallButtonWidth,
110. android.view.ViewGroup.LayoutParams.WRAP_CONTENT));
111. btnPrev.setBackgroundResource(android.R.drawable.btn_default_small);
112.
113. SymbolButton btnNext = new SymbolButton(this,
114. SymbolButton.symbol.arrowRight);
115. btnNext.setLayoutParams(new LayoutParams(iSmallButtonWidth,
116. android.view.ViewGroup.LayoutParams.WRAP_CONTENT));
117. btnNext.setBackgroundResource(android.R.drawable.btn_default_small);
118.
119. // set events
120. btnPrev.setOnClickListener(new Button.OnClickListener() {
121. public void onClick(View arg0) {
122. setPrevViewItem();
123. }
124. });
125. btnToday.setOnClickListener(new Button.OnClickListener() {
126. public void onClick(View arg0) {
127.
128. setTodayViewItem();
129. String s = calToday.get(Calendar.YEAR) + "/"
130. + (calToday.get(Calendar.MONTH) + 1);
131. btnToday.setText(s);
132. }
133. });
134. btnNext.setOnClickListener(new Button.OnClickListener() {
135. public void onClick(View arg0) {
136. setNextViewItem();
137. }
138. });
139.
140. layTopControls.setGravity(Gravity.CENTER_HORIZONTAL);
141. layTopControls.addView(btnPrev);
142. layTopControls.addView(btnToday);
143. layTopControls.addView(btnNext);
144. }
145.
146. private View generateContentView() {
147. LinearLayout layMain = createLayout(LinearLayout.VERTICAL);
148. layMain.setPadding(8, 8, 8, 8);
149. LinearLayout layTopControls = createLayout(LinearLayout.HORIZONTAL);
150.
151. layContent = createLayout(LinearLayout.VERTICAL);
152. layContent.setPadding(20, 0, 20, 0);
153. generateTopButtons(layTopControls);
154. generateCalendar(layContent);
155. layMain.addView(layTopControls);
156. layMain.addView(layContent);
157.
158. tv = new TextView(this);
159. layMain.addView(tv);
160. return layMain;
161. }
162.
163. private View generateCalendarRow() {
164. LinearLayout layRow = createLayout(LinearLayout.HORIZONTAL);
165. for (int iDay = 0; iDay < 7; iDay++) {
166. DateWidgetDayCell dayCell = new DateWidgetDayCell(this,
167. iDayCellSize, iDayCellSize);
168. dayCell.setItemClick(mOnDayCellClick);
169. days.add(dayCell);
170. layRow.addView(dayCell);
171. }
172. return layRow;
173. }
174.
175. private View generateCalendarHeader() {
176. LinearLayout layRow = createLayout(LinearLayout.HORIZONTAL);
177. for (int iDay = 0; iDay < 7; iDay++) {
178. DateWidgetDayHeader day = new DateWidgetDayHeader(this,
179. iDayCellSize, iDayHeaderHeight);
180. final int iWeekDay = DayStyle.getWeekDay(iDay, iFirstDayOfWeek);
181. day.setData(iWeekDay);
182. layRow.addView(day);
183. }
184. return layRow;
185. }
186.
187. private void generateCalendar(LinearLayout layContent) {
188. layContent.addView(generateCalendarHeader());
189. days.clear();
190. for (int iRow = 0; iRow < 6; iRow++) {
191. layContent.addView(generateCalendarRow());
192. }
193. }
194.
195. private Calendar getCalendarStartDate() {
196. calToday.setTimeInMillis(System.currentTimeMillis());
197. calToday.setFirstDayOfWeek(iFirstDayOfWeek);
198.
199. if (calSelected.getTimeInMillis() == 0) {
200. calStartDate.setTimeInMillis(System.currentTimeMillis());
201. calStartDate.setFirstDayOfWeek(iFirstDayOfWeek);
202. } else {
203. calStartDate.setTimeInMillis(calSelected.getTimeInMillis());
204. calStartDate.setFirstDayOfWeek(iFirstDayOfWeek);
205. }
206.
207. UpdateStartDateForMonth();
208.
209. return calStartDate;
210. }
211.
212. private DateWidgetDayCell updateCalendar() {
213. DateWidgetDayCell daySelected = null;
214. boolean bSelected = false;
215. final boolean bIsSelection = (calSelected.getTimeInMillis() != 0);
216. final int iSelectedYear = calSelected.get(Calendar.YEAR);
217. final int iSelectedMonth = calSelected.get(Calendar.MONTH);
218. final int iSelectedDay = calSelected.get(Calendar.DAY_OF_MONTH);
219. calCalendar.setTimeInMillis(calStartDate.getTimeInMillis());
220. for (int i = 0; i < days.size(); i++) {
221. final int iYear = calCalendar.get(Calendar.YEAR);
222. final int iMonth = calCalendar.get(Calendar.MONTH);
223. final int iDay = calCalendar.get(Calendar.DAY_OF_MONTH);
224. final int iDayOfWeek = calCalendar.get(Calendar.DAY_OF_WEEK);
225. DateWidgetDayCell dayCell = days.get(i);
226. // check today
227. boolean bToday = false;
228. if (calToday.get(Calendar.YEAR) == iYear)
229. if (calToday.get(Calendar.MONTH) == iMonth)
230. if (calToday.get(Calendar.DAY_OF_MONTH) == iDay)
231. bToday = true;
232. // check holiday
233. boolean bHoliday = false;
234. if ((iDayOfWeek == Calendar.SATURDAY)
235. || (iDayOfWeek == Calendar.SUNDAY))
236. bHoliday = true;
237. if ((iMonth == Calendar.JANUARY) && (iDay == 1))
238. bHoliday = true;
239.
240. dayCell.setData(iYear, iMonth, iDay, bToday, bHoliday,
241. iMonthViewCurrentMonth);
242. bSelected = false;
243. if (bIsSelection)
244. if ((iSelectedDay == iDay) && (iSelectedMonth == iMonth)
245. && (iSelectedYear == iYear)) {
246. bSelected = true;
247. }
248. dayCell.setSelected(bSelected);
249. if (bSelected)
250. daySelected = dayCell;
251. calCalendar.add(Calendar.DAY_OF_MONTH, 1);
252. }
253. layContent.invalidate();
254. return daySelected;
255. }
256.
257. private void UpdateStartDateForMonth() {
258. iMonthViewCurrentMonth = calStartDate.get(Calendar.MONTH);
259. iMonthViewCurrentYear = calStartDate.get(Calendar.YEAR);
260. calStartDate.set(Calendar.DAY_OF_MONTH, 1);
261. UpdateCurrentMonthDisplay();
262. // update days for week
263. int iDay = 0;
264. int iStartDay = iFirstDayOfWeek;
265. if (iStartDay == Calendar.MONDAY) {
266. iDay = calStartDate.get(Calendar.DAY_OF_WEEK) - Calendar.MONDAY;
267. if (iDay < 0)
268. iDay = 6;
269. }
270. if (iStartDay == Calendar.SUNDAY) {
271. iDay = calStartDate.get(Calendar.DAY_OF_WEEK) - Calendar.SUNDAY;
272. if (iDay < 0)
273. iDay = 6;
274. }
275. calStartDate.add(Calendar.DAY_OF_WEEK, -iDay);
276. }
277.
278. private void UpdateCurrentMonthDisplay() {
279. String s = calCalendar.get(Calendar.YEAR) + "/"
280. + (calCalendar.get(Calendar.MONTH) + 1);// dateMonth.format(calCalendar.getTime());
281. btnToday.setText(s);
282. mYear = calCalendar.get(Calendar.YEAR);
283. }
284.
285. private void setPrevViewItem() {
286. iMonthViewCurrentMonth--;
287. if (iMonthViewCurrentMonth == -1) {
288. iMonthViewCurrentMonth = 11;
289. iMonthViewCurrentYear--;
290. }
291. calStartDate.set(Calendar.DAY_OF_MONTH, 1);
292. calStartDate.set(Calendar.MONTH, iMonthViewCurrentMonth);
293. calStartDate.set(Calendar.YEAR, iMonthViewCurrentYear);
294. UpdateStartDateForMonth();
295. updateCalendar();
296.
297. }
298.
299. private void setTodayViewItem() {
300. calToday.setTimeInMillis(System.currentTimeMillis());
301. calToday.setFirstDayOfWeek(iFirstDayOfWeek);
302. calStartDate.setTimeInMillis(calToday.getTimeInMillis());
303. calStartDate.setFirstDayOfWeek(iFirstDayOfWeek);
304. UpdateStartDateForMonth();
305. updateCalendar();
306. }
307.
308. private void setNextViewItem() {
309. iMonthViewCurrentMonth++;
310. if (iMonthViewCurrentMonth == 12) {
311. iMonthViewCurrentMonth = 0;
312. iMonthViewCurrentYear++;
313. }
314. calStartDate.set(Calendar.DAY_OF_MONTH, 1);
315. calStartDate.set(Calendar.MONTH, iMonthViewCurrentMonth);
316. calStartDate.set(Calendar.YEAR, iMonthViewCurrentYear);
317. UpdateStartDateForMonth();
318. updateCalendar();
319.
320. }
321.
322. private DateWidgetDayCell.OnItemClick mOnDayCellClick = new DateWidgetDayCell.OnItemClick() {
323. public void OnClick(DateWidgetDayCell item) {
324. calSelected.setTimeInMillis(item.getDate().getTimeInMillis());
325. item.setSelected(true);
326. updateCalendar();
327. updateControlsState();
328. }
329. };
330.
331. private void updateControlsState() {
332. SimpleDateFormat dateFull = new SimpleDateFormat("d MMMM yyyy");
333. mYear = calSelected.get(Calendar.YEAR);
334. mMonth = calSelected.get(Calendar.MONTH);
335. mDay = calSelected.get(Calendar.DAY_OF_MONTH);
336. tv.setText(new StringBuilder().append(mYear).append("/")
337. .append(format(mMonth + 1)).append("/").append(format(mDay))
338. .append("-----").append(dateFull.format(calSelected.getTime())));
339. }
340.
341. private String format(int x) {
342. String s = "" + x;
343. if (s.length() == 1)
344. s = "0" + s;
345. return s;
346. }
347.
348.}
DateWidgetDayCell.java:
Java代码
1.package com.iaiai;
2.
3.import java.util.Calendar;
4.
5.import android.content.Context;
6.import android.graphics.Canvas;
7.import android.graphics.LinearGradient;
8.import android.graphics.Paint;
9.import android.graphics.Rect;
10.import android.graphics.RectF;
11.import android.graphics.Shader;
12.import android.view.KeyEvent;
13.import android.view.MotionEvent;
14.import android.view.View;
15.import android.view.animation.AlphaAnimation;
16.import android.widget.LinearLayout.LayoutParams;
17.
39.public class DateWidgetDayCell extends View {
40. // types
41. public interface OnItemClick {
42. public void OnClick(DateWidgetDayCell item);
43. }
44.
45. public static int ANIM_ALPHA_DURATION = 100;
46. // fields
47. private final static float fTextSize = 22;
48. private final static int iMargin = 1;
49. private final static int iAlphaInactiveMonth = 0x88;
50.
51. // fields
52. private int iDateYear = 0;
53. private int iDateMonth = 0;
54. private int iDateDay = 0;
55.
56. // fields
57. private OnItemClick itemClick = null;
58. private Paint pt = new Paint();
59. private RectF rect = new RectF();
60. private String sDate = "";
61.
62. // fields
63. private boolean bSelected = false;
64. private boolean bIsActiveMonth = false;
65. private boolean bToday = false;
66. private boolean bHoliday = false;
67. private boolean bTouchedDown = false;
68.
69. // methods
70. public DateWidgetDayCell(Context context, int iWidth, int iHeight) {
71. super(context);
72. setFocusable(true);
73. setLayoutParams(new LayoutParams(iWidth, iHeight));
74. }
75.
76. public boolean getSelected() {
77. return this.bSelected;
78. }
79.
80. @Override
81. public void setSelected(boolean bEnable) {
82. if (this.bSelected != bEnable) {
83. this.bSelected = bEnable;
84. this.invalidate();
85. }
86. }
87.
88. public void setData(int iYear, int iMonth, int iDay, boolean bToday,
89. boolean bHoliday, int iActiveMonth) {
90. iDateYear = iYear;
91. iDateMonth = iMonth;
92. iDateDay = iDay;
93.
94. this.sDate = Integer.toString(iDateDay);
95. this.bIsActiveMonth = (iDateMonth == iActiveMonth);
96. this.bToday = bToday;
97. this.bHoliday = bHoliday;
98. }
99.
100. public void setItemClick(OnItemClick itemClick) {
101. this.itemClick = itemClick;
102. }
103.
104. private int getTextHeight() {
105. return (int) (-pt.ascent() + pt.descent());
106. }
107.
108. @Override
109. public boolean onKeyDown(int keyCode, KeyEvent event) {
110. boolean bResult = super.onKeyDown(keyCode, event);
111. if ((keyCode == KeyEvent.KEYCODE_DPAD_CENTER)
112. || (keyCode == KeyEvent.KEYCODE_ENTER)) {
113. doItemClick();
114. }
115. return bResult;
116. }
117.
118. @Override
119. public boolean onKeyUp(int keyCode, KeyEvent event) {
120. boolean bResult = super.onKeyUp(keyCode, event);
121. return bResult;
122. }
123.
124. public void doItemClick() {
125. if (itemClick != null)
126. itemClick.OnClick(this);
127. }
128.
129. @Override
130. protected void onFocusChanged(boolean gainFocus, int direction,
131. Rect previouslyFocusedRect) {
132. super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
133. invalidate();
134. }
135.
136. public Calendar getDate() {
137. Calendar calDate = Calendar.getInstance();
138. calDate.clear();
139. calDate.set(Calendar.YEAR, iDateYear);
140. calDate.set(Calendar.MONTH, iDateMonth);
141. calDate.set(Calendar.DAY_OF_MONTH, iDateDay);
142. return calDate;
143. }
144.
145. @Override
146. protected void onDraw(Canvas canvas) {
147. super.onDraw(canvas);
148.
149. // init rectangles
150. rect.set(0, 0, this.getWidth(), this.getHeight());
151. rect.inset(1, 1);
152.
153. // drawing
154. final boolean bFocused = IsViewFocused();
155.
156. drawDayView(canvas, bFocused);
157. drawDayNumber(canvas, bFocused);
158. }
159.
160. private void drawDayView(Canvas canvas, boolean bFocused) {
161. if (bSelected || bFocused) {
162. LinearGradient lGradBkg = null;
163.
164. i
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