Android aidl調用進程間服務的方法

我就拿最近做的項目來說明了，首先創建一個IFMService.aidl的接口文件，在R.java的目錄下會自動生成IFMService.java 的文件, 接口文件的內容如下：

1. package net.kindroid.fm;
3. interface IFMService
4. {
5. /**
6. * open FM
7. */
8. boolean openFM();
10. /**
11. * close FM
12. */
13. boolean closeFM();
15. /**
16. * whether FM is open
17. */
18. boolean isOpen();
20. /**
21. * set a special frequency to the FM
22. */
23. int setCurrentFrequency(in int frequency);
25. /**
26. * search FM tunes
27. */
28. boolean searchStation(in int start, in int direction, in int timeout, in int reserve);
30. /**
31. * get current Frequency
32. */
33. int getCurrentFrequency();
35. /**
36. * stop search FM
37. */
38. boolean stopSearch();
40. /**
41. * set FM volume
42. */
43. boolean setVolume(in int value);
45. /**
46. * get current Volume
47. */
48. int getCurrentVolume();
50. /**
51. * set current mute mode
52. */
53. int setMuteMode(in int mode);
54. }

public class FMService extends Service:實現如下：

1. public class MyServiceimpl extends IFMService.Stub
2. {
3. WeakReference<FMService> mService;
5. MyServiceimpl(FMService service)
6. {
7. mService = new WeakReference<FMService>(service);
8. }
10. @Override
11. public boolean openFM() throws RemoteException
12. {
13. return mService.get().openFM();
14. }
16. @Override
17. public boolean closeFM() throws RemoteException
18. {
19. return mService.get().closeFM();
20. }
22. @Override
23. public boolean isOpen() throws RemoteException
24. {
25. return mService.get().isOpen();
26. }
28. @Override
29. public boolean searchStation(int start, int direction, int timeout, int reserve) throws RemoteException
30. {
31. return mService.get().searchStation(start, direction, timeout, reserve);
32. }
34. @Override
35. public int getCurrentFrequency() throws RemoteException
36. {
37. return mService.get().getTunedFrequency();
38. }
40. @Override
41. public boolean stopSearch() throws RemoteException
42. {
43. return mService.get().stopSearch();
44. }
46. @Override
47. public boolean setVolume(int value) throws RemoteException
48. {
49. return mService.get().setVolume(value);
50. }
52. @Override
53. public int getCurrentVolume() throws RemoteException
54. {
55. return mService.get().getCurrentVolume();
56. }
58. @Override
59. public int setMuteMode(int mode) throws RemoteException
60. {
61. return mService.get().setMuteMode(mode);
62. }
64. @Override
65. public int setCurrentFrequency(int frequency) throws RemoteException
66. {
67. return mService.get().setCurrentFrequency(frequency);
68. }
69. }