Android 使用定时器在指定日期及时间执行任务

 1 public class MainActivity extends Activity {
 2 
 3     private Handler handler = new Handler(){
 4         @Override
 5         public void handleMessage(Message msg) {
 6             switch (msg.what){
 7                 case 1:
 8                     Log.i("print","执行了");
 9                     //需要执行的代码放这里
10                     break;
11             }
12         }
13     };
14 
15     @Override
16     protected void onCreate(Bundle savedInstanceState) {
17         super.onCreate(savedInstanceState);
18         setContentView(R.layout.activity_main);
19 
20         TimerTask task = new TimerTask() {
21             @Override
22             public void run() {
23                 handler.sendEmptyMessage(1);
24             }
25         };
26         Timer timer = new Timer(true);
27         timer.schedule(task,strToDateLong("2017-01-09 11:32:00"));
28     }
29 
30 
31     /**
32      * string类型时间转换为date
33      * @param strDate
34      * @return
35      */
36     public static Date strToDateLong(String strDate) {
37         SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
38         ParsePosition pos = new ParsePosition(0);
39         Date strtodate = formatter.parse(strDate, pos);
40         return strtodate;
41     }
42 }