Android SD card Image Browsing

In activityaction, there is a "action_get_content" String constant, which allows users to select a specific type of data and return the URI of the data. we can use this constant and set the type to "image/*" to obtain all images in the Android mobile phone.

 

 

Main. xml:

1. <? XML version = "1.0" encoding = "UTF-8"?>
2. <Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android"
3. Android: Orientation = "vertical"
4. Android: layout_width = "fill_parent"
5. Android: layout_height = "fill_parent"
6. >
7. <Textview
8. Android: layout_width = "fill_parent"
9. Android: layout_height = "wrap_content"
10. Android: text = "@ string/hello"
11. />
12. <Button
13. Android: Id = "@ + ID/B01"
14. Android: layout_width = "fill_parent"
15. Android: layout_height = "wrap_content"
16. />
17. <Imageview
18. Android: Id = "@ + ID/iv01"
19. Android: layout_width = "fill_parent"
20. Android: layout_height = "wrap_content"
21. />
22. </Linearlayout>

 

 

Lesson_01_pic.java:

1. Package com. yfz;
2. Import java. Io. filenotfoundexception;
3. Import Android. App. activity;
4. Import Android. content. contentresolver;
5. Import Android. content. intent;
6. Import Android. Graphics. Bitmap;
7. Import Android. Graphics. bitmapfactory;
8. Import android.net. Uri;
9. Import Android. OS. Bundle;
10. Import Android. util. log;
11. Import Android. View. view;
12. Import Android. widget. Button;
13. Import Android. widget. imageview;
14. Public class lesson_01_pic extends activity {
15. /** Called when the activity is first created .*/
16. @ Override
17. Public void oncreate (bundle savedinstancestate ){
18. Super. oncreate (savedinstancestate );
19. Setcontentview (R. layout. Main );
21. Button button = (button) findviewbyid (R. Id. B01 );
22. Button. settext ("select image ");
23. Button. setonclicklistener (New button. onclicklistener (){
24. @ Override
25. Public void onclick (view v ){
26. Intent intent = new intent ();
27. /* Enable pictures image type to set to image */
28. Intent. settype ("image /*");
29. /* Use the intent. action_get_content action */
30. Intent. setaction (intent. action_get_content );
31. /* Return to the current screen after obtaining the photo */
32. Startactivityforresult (intent, 1 );
33. }
35. });
36. }
38. @ Override
39. Protected void onactivityresult (INT requestcode, int resultcode, intent data ){
40. If (resultcode = result_ OK ){
41. Uri uri = data. getdata ();
42. Log. E ("Uri", Uri. tostring ());
43. Contentresolver Cr = This. getcontentresolver ();
44. Try {
45. Bitmap bitmap = bitmapfactory. decodestream (Cr. openinputstream (URI ));
46. Imageview = (imageview) findviewbyid (R. Id. iv01 );
47. /* Set bitmap to imageview */
48. Imageview. setimagebitmap (Bitmap );
49. } Catch (filenotfoundexception e ){
50. Log. E ("exception", E. getmessage (), e );
51. }
52. }
53. Super. onactivityresult (requestcode, resultcode, data );
54. }
55. }