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.把图片放到SD卡的相机默认保存目录中：
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. }
