Android Image Selector

1. Overview

Should be the company's project needs, to do a picture selector, online search for some source code, I have been modified on the basis of others, the other page has been restructured, I am loading the image Folder List, and then enter the selection of pictures.
Reference Blog Address: http://blog.csdn.net/lmj623565791/article/details/39943731
Fix bug: Can scan gif file, and suffix name is uppercase or can be scanned out for example: image. Gif

As follows:

2. Scan the image folder core code, is to open a thread to scan all the pictures of the database, and then find their parent path, then go to heavy, with handle update the UI

2. New Thread (New Runnable () {
4. @Override
6. public void Run () {
8. String firstimage = null;
10. Uri Mimageuri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
12. Contentresolver mcontentresolver = ImageFolderActivity.this.getContentResolver ();
14. Query only JPEG and PNG and GIF pictures
16. Cursor mcursor = mcontentresolver.query (Mimageuri, NULL,
18. MediaStore.Images.Media.MIME_TYPE + "=? or "
20. + MediaStore.Images.Media.MIME_TYPE + "=? or "+mediastore.images.media.mime_type +" =? ",
22. New string[] {"Image/jpeg", "Image/png", "Image/gif"},
24. MediaStore.Images.Media.DATE_MODIFIED);
28. LOG.E ("TAG", Mcursor.getcount () + "");
32. hashset<string> mdirpaths = new hashset<string> ();//Temporary auxiliary class to prevent multiple scans of the same folder
34. while (Mcursor.movetonext ()) {
36. Get the path to a picture
38. String path = mcursor.getstring (Mcursor.getcolumnindex (MediaStore.Images.Media.DATA));
40. LOG.E ("TAG", Path);
42. Get the path to the first picture
44. if (firstimage = = null)
46. Firstimage = path;
48. Gets the parent path name of the picture
50. File Parentfile = new file (path). Getparentfile ();
52. if (Parentfile = = null)
54. Continue
56. String Dirpath = Parentfile.getabsolutepath ();
58. Imagefloder imagefloder = null;
60. Use a hashset to prevent multiple scans of the same folder (without this judgment, the picture is still quite scary ~ ~)
62. if (Mdirpaths.contains (Dirpath)) {
64. Continue
66. } else {
68. Mdirpaths.add (Dirpath);
70. Initialize Imagefloder
72. Imagefloder = new Imagefloder ();
74. Imagefloder.setdir (Dirpath);
76. Imagefloder.setfirstimagepath (path);
78. }
82. Get the number of current directory slices
84. int picsize = parentfile.list (new FilenameFilter () {
86. @Override
88. Public Boolean Accept (File dir, String fileName) {
90. Return Util.isimage (FileName);
92. }
94. }). length;
96. Imagefloder.setcount (picsize);
98. Mimagefloders.add (Imagefloder);
100. }
102. Mcursor.close ();
104. Notify handler scan Picture complete
106. Mhandler.sendemptymessage (0x110);
108. }
110. }). Start ();

3. The picture list is to filter all the files in the current folder according to the name suffix, and then display them. Put it in a GridView.

1. File Dirfile=new file (Getintent (). Getstringextra (Constant.dir));
2. Images = Arrays.aslist (dirfile.list (new FilenameFilter () {
3. @Override
4. Public Boolean Accept (File dir, String filename) {
5. return util.isimage (filename);
6. }
7. }));

Click to download the source code

Android Image Selector