listview展示倒计时

1. public class MainActivity extends Activity {
2. /**截至时间数据源**/
3. private List<Date> listData;
4. /**当前时间**/
5. private long time_Current;
6. /**ListView控件**/
7. private ListView listView;
8. /**适配器**/
9. private MyCountAdapter myCountAdapter;
10. //这里很重要，使用Handler的延时效果，每隔一秒刷新一下适配器，以此产生倒计时效果
11. private Handler handler_timeCurrent = new Handler(){
12. @Override
13. public void handleMessage(Message msg) {
14. time_Current = time_Current+1000;
15. myCountAdapter.notifyDataSetChanged();
16. handler_timeCurrent.sendEmptyMessageDelayed(0,1000);
17. }
18. };
19. @Override
20. protected void onCreate(Bundle savedInstanceState) {
21. super.onCreate(savedInstanceState);
22. setContentView(R.layout.activity_main);
23. listView = (ListView) findViewById(R.id.listView);
24. //模拟活动截至时间数据
25. listData = new ArrayList<Date>();
26. listData.add(new Date(2016,3,16,8,20,31));
27. listData.add(new Date(2016,3,16,8,21,20));
28. listData.add(new Date(2016,3,16,13,21,22));
29. listData.add(new Date(2016,3,16,8,21,20));
30. listData.add(new Date(2016,3,16,8,21,23));
31. listData.add(new Date(2016,3,16,14,21,20));
32. listData.add(new Date(2016,3,16,8,21,23));
33. listData.add(new Date(2016,3,16,8,21,24));
34. listData.add(new Date(2016,3,16,8,21,20));
35. listData.add(new Date(2016,3,16,8,22,25));
36. listData.add(new Date(2016,3,16,8,23,20));
37. listData.add(new Date(2016,3,16,8,24,26));
38. listData.add(new Date(2016,3,16,8,25,20));
39. listData.add(new Date(2016,3,16,8,24,25));
40. listData.add(new Date(2016,3,16,8,25,20));
41. listData.add(new Date(2016,3,16,8,24,26));
42. listData.add(new Date(2016,3,16,11,20,20));
43. listData.add(new Date(2016,3,16,14,40,20));
44. listData.add(new Date(2016,3,16,8,44,20));
45. listData.add(new Date(2016,3,16,10,20,20));
46. //模拟当前服务器时间数据
47. Date date = new Date(2016,3,16,8,20,20);
48. time_Current = date.getTime();
49. myCountAdapter = new MyCountAdapter();
50. listView.setAdapter(myCountAdapter);
51. handler_timeCurrent.sendEmptyMessageDelayed(0,1000);
52. }
53. //防止当前Activity结束以后,   handler依然继续循环浪费资源
54. @Override
55. protected void onDestroy() {
56. handler_timeCurrent.removeCallbacksAndMessages(null);
57. super.onDestroy();
58. }
59. public class MyCountAdapter extends BaseAdapter{
60. @Override
61. public int getCount() {
62. return listData.size();
63. }
64. @Override
65. public Object getItem(int position) {
66. return listData.get(position);
67. }
68. @Override
69. public long getItemId(int position) {
70. return position;
71. }
72. @Override
73. public View getView(int position, View convertView, ViewGroup parent) {
74. ViewHolder holder = null;
75. if(convertView == null){
76. convertView = View.inflate(MainActivity.this, R.layout.item_adapter_listview, null);
77. holder = new ViewHolder();
78. holder.tv_hour = (TextView) convertView.findViewById(R.id.tv_hour);
79. holder.tv_minute = (TextView) convertView.findViewById(R.id.tv_minute);
80. holder.tv_second = (TextView) convertView.findViewById(R.id.tv_second);
81. convertView.setTag(holder);
82. }else{
83. holder = (ViewHolder) convertView.getTag();
84. }
85. Date date_finish = listData.get(position);
86. updateTextView( date_finish.getTime()-time_Current, holder);
87. return convertView;
88. }
89. /****
90. * 刷新倒计时控件
91. */
92. public void updateTextView(long times_remain,ViewHolder hoder) {
93. if (times_remain <= 0) {
94. hoder.tv_hour.setText("00");
95. hoder.tv_minute.setText("00");
96. hoder.tv_second.setText("00");
97. return;
98. }
99. //秒钟
100. long time_second = (times_remain/1000)%60;
101. String str_second;
102. if (time_second < 10) {
103. str_second = "0" + time_second;
104. } else {
105. str_second = "" + time_second;
106. }
107. long time_temp = ((times_remain / 1000) - time_second) / 60;
108. //分钟
109. long time_minute = time_temp % 60;
110. String str_minute;
111. if (time_minute < 10) {
112. str_minute = "0" + time_minute;
113. } else {
114. str_minute = "" + time_minute;
115. }
116. time_temp = (time_temp - time_minute) / 60;
117. //小时
118. long time_hour = time_temp;
119. String str_hour;
120. if (time_hour < 10) {
121. str_hour = "0" + time_hour;
122. } else {
123. str_hour = "" + time_hour;
124. }
125. hoder.tv_hour.setText(str_hour);
126. hoder.tv_minute.setText(str_minute);
127. hoder.tv_second.setText(str_second);
128. }
129. private class ViewHolder{
130. /** 小时 **/
131. private TextView tv_hour;
132. /** 分钟 **/
133. private TextView tv_minute;
134. /** 秒 **/
135. private TextView tv_second;
136. }
137. }
138. }