一个android文件的Uri地址一般如下：
content://media/external/images/media/62026
这是一张图片的Uri，那么我们如何根据这个Uri获得其在文件系统中的路径呢？
其实很简单，直接上代码：
1. /**
2. * Try to return the absolute file path from the given Uri
3. *
4. * @param context
5. * @param uri
6. * @return the file path or null
7. */
8. public static String getRealFilePath( final Context context, final Uri uri ) {
9. if ( null == uri ) return null;
10. final String scheme = uri.getScheme();
11. null;
12. if ( scheme == null )
13. data = uri.getPath();
14. else if ( ContentResolver.SCHEME_FILE.equals( scheme ) ) {
15. data = uri.getPath();
16. else if ( ContentResolver.SCHEME_CONTENT.equals( scheme ) ) {
17. new String[] { ImageColumns.DATA }, null, null, null );
18. if ( null != cursor ) {
19. if ( cursor.moveToFirst() ) {
20. int index = cursor.getColumnIndex( ImageColumns.DATA );
21. if ( index > -1 ) {
22. data = cursor.getString( index );
23. }
24. }
25. cursor.close();
26. }
27. }
28. return data;
29. }
那么假如我们有一个图片的路径地址又该如何获得其Uri呢？
1. String type = Utils.ensureNotNull(intent.getType());
2. Log.d(TAG, "uri is " + uri);
3. if (uri.getScheme().equals("file") && (type.contains("image/"))) {
4. String path = uri.getEncodedPath();
5. "path1 is " + path);
6. if (path != null) {
7. path = Uri.decode(path);
8. "path2 is " + path);
9. this.getContentResolver();
10. new StringBuffer();
11. "(")
12. .append(Images.ImageColumns.DATA)
13. "=")
14. "'" + path + "'")
15. ")");
16. Cursor cur = cr.query(
17. Images.Media.EXTERNAL_CONTENT_URI,
18. new String[] { Images.ImageColumns._ID },
19. null, null);
20. int index = 0;
21. for (cur.moveToFirst(); !cur.isAfterLast(); cur
22. .moveToNext()) {
23. index = cur.getColumnIndex(Images.ImageColumns._ID);
24. // set _id value
25. index = cur.getInt(index);
26. }
27. if (index == 0) {
28. //do nothing
29. else {
30. Uri uri_temp = Uri
31. "content://media/external/images/media/"
32. + index);
33. "uri_temp is " + uri_temp);
34. if (uri_temp != null) {
35. uri = uri_temp;
36. }
37. }
38. }
39. }
一个android文件的Uri地址一般如下：
content://media/external/images/media/62026
这是一张图片的Uri，那么我们如何根据这个Uri获得其在文件系统中的路径呢？
其实很简单，直接上代码：
1. /**
2. * Try to return the absolute file path from the given Uri
3. *
4. * @param context
5. * @param uri
6. * @return the file path or null
7. */
8. public static String getRealFilePath( final Context context, final Uri uri ) {
9. if ( null == uri ) return null;
10. final String scheme = uri.getScheme();
11. null;
12. if ( scheme == null )
13. data = uri.getPath();
14. else if ( ContentResolver.SCHEME_FILE.equals( scheme ) ) {
15. data = uri.getPath();
16. else if ( ContentResolver.SCHEME_CONTENT.equals( scheme ) ) {
17. new String[] { ImageColumns.DATA }, null, null, null );
18. if ( null != cursor ) {
19. if ( cursor.moveToFirst() ) {
20. int index = cursor.getColumnIndex( ImageColumns.DATA );
21. if ( index > -1 ) {
22. data = cursor.getString( index );
23. }
24. }
25. cursor.close();
26. }
27. }
28. return data;
29. }
那么假如我们有一个图片的路径地址又该如何获得其Uri呢？
1. String type = Utils.ensureNotNull(intent.getType());
2. Log.d(TAG, "uri is " + uri);
3. if (uri.getScheme().equals("file") && (type.contains("image/"))) {
4. String path = uri.getEncodedPath();
5. "path1 is " + path);
6. if (path != null) {
7. path = Uri.decode(path);
8. "path2 is " + path);
9. this.getContentResolver();
10. new StringBuffer();
11. "(")
12. .append(Images.ImageColumns.DATA)
13. "=")
14. "'" + path + "'")
15. ")");
16. Cursor cur = cr.query(
17. Images.Media.EXTERNAL_CONTENT_URI,
18. new String[] { Images.ImageColumns._ID },
19. null, null);
20. int index = 0;
21. for (cur.moveToFirst(); !cur.isAfterLast(); cur
22. .moveToNext()) {
23. index = cur.getColumnIndex(Images.ImageColumns._ID);
24. // set _id value
25. index = cur.getInt(index);
26. }
27. if (index == 0) {
28. //do nothing
29. else {
30. Uri uri_temp = Uri
31. "content://media/external/images/media/"
32. + index);
33. "uri_temp is " + uri_temp);
34. if (uri_temp != null) {
35. uri = uri_temp;
36. }
37. }
38. }
39. }
