如何从SDCARD文件夹的子文件夹中获取图像？

Question

下面的代码用于从特定文件夹获取图像，但是如何获取sdcard文件夹的子文件夹的图像

Cursor actualimagecursor = managedQuery(
    MediaStore.Images.Media.EXTERNAL_CONTENT_URI, proj,
    MediaStore.Images.Media.DATA + " like ? ",
    new String[] { "%unzipped%" }, null);

不好意思，英语交流不好

Answer 1

试试下面的代码

public void searchImageFromSpecificDirectory() {
        String path = null;
        String uri = MediaStore.Images.Media.DATA;
        // if GetImageFromThisDirectory is the name of the directory from which image will be retrieved
        String condition = uri + " like '%/GetImageFromThisDirectory/%'";
        String[] projection = { uri, MediaStore.Images.Media.DATE_ADDED,
                MediaStore.Images.Media.SIZE };
        Vector additionalFiles = null;
        try {
            if (additionalFiles == null) {
                additionalFiles = new Vector<String>();
            }

            Cursor cursor = managedQuery(
                    MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection,
                    condition, null, null);
            if (cursor != null) {
                boolean isDataPresent = cursor.moveToFirst();
                if (isDataPresent) {
                    do {
                        path = cursor.getString(cursor.getColumnIndex(uri));
System.out.println("...path..."+path);
additionalFiles.add(path);
            }while(cursor.moveToNext());
                }
            if (cursor != null) {
                cursor.close();
            }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

Answer 2

试试下面的代码:在images文件夹中包含Sample子文件夹

Cursor cursor = managedQuery(android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null,Images.Media.DATA + " like '/mnt/sdcard/Images/Sample%'", null, null);
while (cursor.moveToNext()) {
            System.out.println(cursor.getString(cursor.getColumnIndex(Images.Media.DATA)));
            System.out.println(cursor.getString(cursor.getColumnIndex(Images.Media.DISPLAY_NAME)));
}

Answer 3

我想给你一个建议，看看你是否想看一个特定的目录假设/sdcard/。然后使用FileObserver类并使其对每个子目录递归。它肯定对你有帮助。试一试。