Turn off the flashlight on Android (milestone 2.1)

Different mobile phones use different methods to enable Flash. Here, the Motorola milestone mobile phone is used as an example main. xml:

[HTML]
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1. <? XML version = "1.0" encoding = "UTF-8"?>
2. <Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android"
3. Android: layout_width = "fill_parent"
4. Android: layout_height = "fill_parent"
5. Android: Orientation = "vertical">
6. <Button
7. Android: Id = "@ + ID/Open"
8. Android: layout_width = "fill_parent"
9. Android: layout_height = "wrap_content"
10. Android: text = "@ string/Open"/>
11. <Button
12. Android: Id = "@ + ID/Close"
13. Android: layout_width = "fill_parent"
14. Android: layout_height = "wrap_content"
15. Android: text = "@ string/Close"/>
16. </Linearlayout>

Activity Code:

[Java]
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1. Package com. Android. Flashlight;
3. Import Android. App. activity;
4. Import Android. OS. Bundle;
5. Import Android. View. view;
6. Import Android. widget. Button;
8. Public class androidflashlightactivity extends activity {
9. /** Called when the activity is first created .*/
11. Private button mbtnopen, mbtnclose;
12. Private myflashlight;
14. @ Override
15. Public void oncreate (bundle savedinstancestate ){
16. Super. oncreate (savedinstancestate );
17. Setcontentview (R. layout. Main );
19. Mbtnopen = (button) findviewbyid (R. Id. Open );
20. Mbtnclose = (button) findviewbyid (R. Id. Close );
22. Try {
23. Myflashlight = new myflashlight ();
24. } Catch (exception e ){
25. E. printstacktrace ();
26. }
28. Mbtnopen. setonclicklistener (New button. onclicklistener (){
30. @ Override
31. Public void onclick (view v ){
32. If (myflashlight. isenabled () = false ){
33. Myflashlight. Enable (true );
34. }
35. }
36. });
38. Mbtnclose. setonclicklistener (New button. onclicklistener (){
40. @ Override
41. Public void onclick (view v ){
42. If (myflashlight. isenabled () = true ){
43. Myflashlight. Enable (false );
44. }
45. }
46. });
47. }
48. }

Encapsulation Method:

[Java]
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1. Package com. Android. Flashlight;
3. Import java. Lang. Reflect. method;
4. Import Android. OS. ibinder;
6. Public class myflashlight {
7. Private object SVC = NULL;
8. Private method getflashlightenabled = NULL;
9. Private method setflashlightenabled = NULL;
11. @ Suppresswarnings ("unchecked ")
12. Public myflashlight () throws exception {
13. Try {
14. // Call servicemanager. getservice ("hardware") to get an ibinder for the service.
15. // This appears to be totally uninitialized ented and not exposed in the SDK whatsoever.
16. Class Sm = Class. forname ("android. OS. servicemanager ");
17. Object hwbinder = Sm. getmethod ("getservice", String. Class). Invoke (null, "hardware ");
19. // Get the hardware service stub. This seems to just get us one step closer to the proxy
20. Class hwsstub = Class. forname ("android. OS. ihardwareservice $ stub ");
21. Method asinterface = hwsstub. getmethod ("asinterface", Android. OS. ibinder. Class );
22. SVC = asinterface. Invoke (null, (ibinder) hwbinder );
24. // Grab the class (Android. OS. ihardwareservice $ stub $ proxy) so we can reflect on its methods
25. Class proxy = SVC. getclass ();
27. // Save Methods
28. Getflashlightenabled = proxy. getmethod ("getflashlightenabled ");
29. Setflashlightenabled = proxy. getmethod ("setflashlightenabled", Boolean. Class );
30. }
31. Catch (exception e ){
32. Throw new exception ("led cocould not be initialized ");
33. }
34. }
36. Public Boolean isenabled (){
37. Try {
38. Return getflashlightenabled. Invoke (SVC). Equals (true );
39. }
40. Catch (exception e ){
41. Return false;
42. }
43. }
45. Public void enable (Boolean TF ){
46. Try {
47. Setflashlightenabled. Invoke (SVC, TF );
48. }
49. Catch (exception e ){}
50. }
51. }