Surfaceview transparent and translucent

1. Transparent // transparent
2. Translucent // translucent

1.  
3. Import Android. App. activity;
4. Import Android. content. context;
5. Import Android. Graphics. Bitmap;
6. Import Android. Graphics. bitmapfactory;
7. Import Android. Graphics. Canvas;
8. Import Android. Graphics. pixelformat;
9. Import Android. OS. Bundle;
10. Import Android. View. motionevent;
11. Import Android. View. surfaceholder;
12. Import Android. View. surfaceholder. Callback;
13. Import Android. View. surfaceview;
15. Public class transparentactivity extends activity {
16. /** Called when the activity is first created .*/
17. Class mysurfaceview extends surfaceview implements callback {
18. Float left, top;
19. Bitmap bitmap = bitmapfactory. decoderesource (getresources (), R. drawable. reen );
20. Public mysurfaceview (context ){
21. Super (context );
22. // Todo auto-generated constructor stub
23. <Span style = "color: # ff0000;"> getholder (). setformat (pixelformat. Transparent); // set to transparent
24. // Getholder (). setformat (pixelformat. translucent); // translucent
25. Getholder (). addcallback (this );
26. Setfocusable (true );
27. }
29. @ Override
30. Public void surfacechanged (surfaceholder holder, int format, int width,
31. Int height ){
32. // Todo auto-generated method stub
34. }
36. @ Override
37. Public void surfacecreated (surfaceholder holder ){
38. // Todo auto-generated method stub
39. Dodraw ();
40. }
42. Private void dodraw (){
43. // Todo auto-generated method stub
44. Canvas canvas = getholder (). lockcanvas ();
45. Canvas. drawbitmap (bitmap, left, top, null );
46. Getholder (). unlockcanvasandpost (canvas );
47. }
49. @ Override
50. Public void surfacedestroyed (surfaceholder holder ){
51. // Todo auto-generated method stub
53. }
55. /* (Non-javadoc)
56. * @ See Android. App. Activity # ontouchevent (Android. View. motionevent)
57. */
58. @ Override
59. Public Boolean ontouchevent (motionevent event ){
60. // Todo auto-generated method stub
61. Left = event. getx ();
62. Top = event. Gety ();
63. Dodraw ();
65. Return super. ontouchevent (event );
66. }
67. }
68. @ Override
69. Public void oncreate (bundle savedinstancestate ){
70. Super. oncreate (savedinstancestate );
71. Setcontentview (New mysurfaceview (getapplicationcontext ()));
73. }
75. }

Androidmanifest. xml

 

1. <? XML version = "1.0" encoding = "UTF-8"?>
2. <Manifest xmlns: Android = "<a href =" http://schemas.android.com/apk/res/android "> http://schemas.android.com/apk/res/android </a>"
3. Package = "RW. Trans"
4. Android: versioncode = "1"
5. Android: versionname = "1.0" type = "codeph" text = "/codeph">
6. <Uses-SDK Android: minsdkversion = "10"/> <application Android: icon = "@ drawable/icon" Android: Label = "@ string/app_name">
7. <Activity Android: Name = ". transparentactivity"
8. Android: Label = "transparent surfaceview"
9. Android: theme = "@ Android: style/theme. translucent"
10. >
11. <Intent-filter>
12. <Action Android: Name = "android. Intent. Action. Main"/>
13. <Category Android: Name = "android. Intent. Category. launcher"/>
14. </Intent-filter>
15. </Activity> </Application>
16. </Manifest>