how to list images on sd card sorted according to time

问题

I can get the list of images in sd card using fololowing`

but these are not sorted

how can I get them sorted either by name or time

thanks in advance

String ExternalStorageDirectoryPath = Environment
                    .getExternalStorageDirectory().getAbsolutePath();

            String targetPath = ExternalStorageDirectoryPath + "/somedirectoryname/";

            File targetDirectory = new File(targetPath);

            File[] files = targetDirectory.listFiles();`
for (File file : files1) {
                    list.add(file.getAbsolutePath().toString());
                }

回答1:

Maybe it will be easier if you use the built-in content provider

     MediaStore.Images.Media.query(cr, uri, projection, where, orderBy)

something like this:

    String[] projection = {MediaColumns._ID, MediaColumns.DISPLAY_NAME, MediaColumns.DATE_ADDED};
    Cursor c = MediaStore.Images.Media.query(getContentResolver(), MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection, null, MediaColumns.DATE_ADDED);

then you can loop the cursor to do whatever you need.

回答2:

- Use lastModified() method of File to get the time the file was modified.

- Store them in Collection like ArrayList<File>.

- Use java.util.Comparator<T> to compare and sort them according to time and name.

来源：https://stackoverflow.com/questions/13824233/how-to-list-images-on-sd-card-sorted-according-to-time