Android 图像存储在SD卡ContentResolver
Android 图像存储在SD卡ContentResolver
2010年08月06日 下午 03:27
| 关于Android 拍照程序保存图片问题，用程序拍摄到图片以后，直接保存在SD卡里，但是无法在相册中预览和查看，必须使用以下方式，才能把图片加载到系统相册中。 1. public class ImageManager { 2. public static Uri addImageAsCamera(ContentResolver cr, Bitmap bitmap) { 3. long dateTaken = System.currentTimeMillis(); 4. String name = createName(dateTaken) + ".jpg"; 5. String uriStr = MediaStore.Images.Media.insertImage(cr, bitmap, name, 6. null); 7. return Uri.parse(uriStr); 8. } 9. 10. private static String createName(long dateTaken) { 11. return DateFormat.format("yyyy-MM-dd_kk.mm.ss", dateTaken).toString(); 12. } 13. } 2.指定文件卡，放入图片，并能够预览。 1. private static final String TAG = "ImageManager"; 2. private static final String APPLICATION_NAME = "PATOM"; 3. private static final Uri IMAGE_URI = MediaStore.Images.Media.EXTERNAL_CONTENT_URI; 4. private static final String PATH = Environment.getExternalStorageDirectory().toString() + "/" + APPLICATION_NAME; 5. 6. public static Uri addImageAsApplication(ContentResolver cr, Bitmap bitmap) { 7. long dateTaken = System.currentTimeMillis(); 8. String name = createName(dateTaken) + ".jpg"; 9. return addImageAsApplication(cr, name, dateTaken, PATH, name, bitmap, null); 10. } 11. 12. public static Uri addImageAsApplication(ContentResolver cr, String name, 13. long dateTaken, String directory, 14. String filename, Bitmap source, byte[] jpegData) { 15. 16. OutputStream outputStream = null; 17. String filePath = directory + "/" + filename; 18. try { 19. File dir = new File(directory); 20. if (!dir.exists()) { 21. dir.mkdirs(); 22. Log.d(TAG, dir.toString() + " create"); 23. } 24. File file = new File(directory, filename); 25. if (file.createNewFile()) { 26. outputStream = new FileOutputStream(file); 27. if (source != null) { 28. source.compress(CompressFormat.JPEG, 75, outputStream); 29. } else { 30. outputStream.write(jpegData); 31. } 32. } 33. 34. } catch (FileNotFoundException ex) { 35. Log.w(TAG, ex); 36. return null; 37. } catch (IOException ex) { 38. Log.w(TAG, ex); 39. return null; 40. } finally { 41. if (outputStream != null) { 42. try { 43. outputStream.close(); 44. } catch (Throwable t) { 45. } 46. } 47. } 48. 49. ContentValues values = new ContentValues(7); 50. values.put(Images.Media.TITLE, name); 51. values.put(Images.Media.DISPLAY_NAME, filename); 52. values.put(Images.Media.DATE_TAKEN, dateTaken); 53. values.put(Images.Media.MIME_TYPE, "image/jpeg"); 54. values.put(Images.Media.DATA, filePath); 55. return cr.insert(IMAGE_URI, values); 56. } |