Android三种实现定时器的方法

方法一:Handler+Thread

[java] view plaincopyprint?

1. package com.xunfang.handerDemo;
3. import android.app.Activity;
4. import android.os.Bundle;
5. import android.os.Handler;
6. import android.os.Message;
7. import android.widget.TextView;
9. /**
10. * handler定时器
11. *
12. * @author Smalt
13. *
14. */
15. public class HanderDemoActivityextends Activity {
16. TextView tvShow;
17. private int i =0;
19. @Override
20. public void onCreate(Bundle savedInstanceState) {
21. super.onCreate(savedInstanceState);
22. setContentView(R.layout.main);
23. tvShow = (TextView) findViewById(R.id.tv_show);
24. new Thread(new ThreadShow()).start();
25. }
27. // handler类接收数据
28. Handler handler = new Handler() {
29. public void handleMessage(Message msg) {
30. if (msg.what == 1) {
31. tvShow.setText(Integer.toString(i++));
32. System.out.println("receive....");
33. }
34. };
35. };
37. // 线程类
38. class ThreadShow implements Runnable {
40. @Override
41. public void run() {
42. // TODO Auto-generated method stub
43. while (true) {
44. try {
45. Thread.sleep(1000);
46. Message msg = new Message();
47. msg.what = 1;
48. handler.sendMessage(msg);
49. System.out.println("send...");
50. } catch (Exception e) {
51. // TODO Auto-generated catch block
52. e.printStackTrace();
53. System.out.println("thread error...");
54. }
55. }
56. }
57. }
58. }

package com.xunfang.handerDemo;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.widget.TextView;/** * handler定时器 *  * @author Smalt *  */public class HanderDemoActivity extends Activity {TextView tvShow;private int i = 0;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);tvShow = (TextView) findViewById(R.id.tv_show);new Thread(new ThreadShow()).start();}// handler类接收数据Handler handler = new Handler() {public void handleMessage(Message msg) {if (msg.what == 1) {tvShow.setText(Integer.toString(i++));System.out.println("receive....");}};};// 线程类class ThreadShow implements Runnable {@Overridepublic void run() {// TODO Auto-generated method stubwhile (true) {try {Thread.sleep(1000);Message msg = new Message();msg.what = 1;handler.sendMessage(msg);System.out.println("send...");} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();System.out.println("thread error...");}}}}}

方法二:Handler类自带的postDelyed

[java] view plaincopyprint?

1. package com.xunfang.handerDemo;
3. import android.app.Activity;
4. import android.os.Bundle;
5. import android.os.Handler;
6. import android.widget.TextView;
8. /**
9. * handler定时器使用postDelyed实现
10. *
11. * @author Smalt
12. *
13. */
14. public class HanderDemoActivityextends Activity {
15. TextView tvShow;
16. private int i =0;
17. private int TIME =1000;
19. @Override
20. public void onCreate(Bundle savedInstanceState) {
21. super.onCreate(savedInstanceState);
22. setContentView(R.layout.main);
23. tvShow = (TextView) findViewById(R.id.tv_show);
24. handler.postDelayed(runnable, TIME); //每隔1s执行
25. }
27. Handler handler = new Handler();
28. Runnable runnable = new Runnable() {
30. @Override
31. public void run() {
32. // handler自带方法实现定时器
33. try {
34. handler.postDelayed(this, TIME);
35. tvShow.setText(Integer.toString(i++));
36. System.out.println("do...");
37. } catch (Exception e) {
38. // TODO Auto-generated catch block
39. e.printStackTrace();
40. System.out.println("exception...");
41. }
42. }
43. };
45. }

package com.xunfang.handerDemo;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.widget.TextView;/** * handler定时器使用postDelyed实现 *  * @author Smalt *  */public class HanderDemoActivity extends Activity {TextView tvShow;private int i = 0;private int TIME = 1000;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);tvShow = (TextView) findViewById(R.id.tv_show);handler.postDelayed(runnable, TIME); //每隔1s执行}Handler handler = new Handler();Runnable runnable = new Runnable() {@Overridepublic void run() {// handler自带方法实现定时器try {handler.postDelayed(this, TIME);tvShow.setText(Integer.toString(i++));System.out.println("do...");} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();System.out.println("exception...");}}};}

方法三:

Handler+Timer+TimerTask

[java] view plaincopyprint?

1. package com.xunfang.handerDemo;
3. import java.util.Timer;
4. import java.util.TimerTask;
6. import android.app.Activity;
7. import android.os.Bundle;
8. import android.os.Handler;
9. import android.os.Message;
10. import android.widget.TextView;
12. /**
13. * 定时器实现:Handler+Timer+TimerTask
14. *
15. * @author Smalt
16. *
17. */
18. public class HanderDemoActivityextends Activity {
19. TextView tvShow;
20. private int i =0;
21. private int TIME =1000;
23. @Override
24. public void onCreate(Bundle savedInstanceState) {
25. super.onCreate(savedInstanceState);
26. setContentView(R.layout.main);
27. tvShow = (TextView) findViewById(R.id.tv_show);
28. timer.schedule(task, 1000, 1000); // 1s后执行task,经过1s再次执行
29. }
31. Handler handler = new Handler() {
32. public void handleMessage(Message msg) {
33. if (msg.what == 1) {
34. tvShow.setText(Integer.toString(i++));
35. }
36. super.handleMessage(msg);
37. };
38. };
39. Timer timer = new Timer();
40. TimerTask task = new TimerTask() {
42. @Override
43. public void run() {
44. // 需要做的事:发送消息
45. Message message = new Message();
46. message.what = 1;
47. handler.sendMessage(message);
48. }
49. };
50. }

package com.xunfang.handerDemo;import java.util.Timer;import java.util.TimerTask;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.widget.TextView;/** * 定时器实现:Handler+Timer+TimerTask *  * @author Smalt *  */public class HanderDemoActivity extends Activity {TextView tvShow;private int i = 0;private int TIME = 1000;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);tvShow = (TextView) findViewById(R.id.tv_show);timer.schedule(task, 1000, 1000); // 1s后执行task,经过1s再次执行}Handler handler = new Handler() {public void handleMessage(Message msg) {if (msg.what == 1) {tvShow.setText(Integer.toString(i++));}super.handleMessage(msg);};};Timer timer = new Timer();TimerTask task = new TimerTask() {@Overridepublic void run() {// 需要做的事:发送消息Message message = new Message();message.what = 1;handler.sendMessage(message);}};}