Question

我有这个代码（在这个网站上找到的地方）：

    public static List<MyImages> getImages(Activity context) {
    List<MyImages> lst = new ArrayList<MyImages>();
    Cursor cursor = getCameraThumbImages(context);
    if (cursor != null) {
        int columnIndex = cursor
                .getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID);
        int columnIndexPath = cursor
                .getColumnIndexOrThrow(MediaStore.Images.Thumbnails.DATA);
        int columnIndexImagePath = cursor
                .getColumnIndexOrThrow(MediaStore.Images.Thumbnails.IMAGE_ID);
        int count = cursor.getCount();
        for (int i = 0; i < count; i++) {
            cursor.moveToPosition(i);

            int imageID = cursor.getInt(columnIndex);
            String path = cursor.getString(columnIndexPath);
            Uri imgThmbPath = Uri.withAppendedPath(
                    MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, ""
                            + imageID);
            String hope = cursor.getString(columnIndexImagePath);
            MyImages p2p = new MyImages(path, "" + imageID);
            lst.add(p2p);
        }
    }

    return lst;
}

此代码允许我访问手机上图像的缩略图。问题是我没有看到如何从中获取原始图像路径。

问题是：给定缩略图（或光标），我如何获得原始图像路径？

Answer 1

在缩略图中，您有MediaStore.Images.Thumbnails.IMAGE_ID字段，您可以从中获取相关的图片ID。然后查询MediaStore.Images.Media并从MediaStore.Images.Media.DATA字段获取照片的路径。

修改

// First request thumbnails what you want String[] projection = new String[] {MediaStore.Images.Thumbnails._ID, MediaStore.Images.Thumbnails.IMAGE_ID}; Cursor thumbnails = contentResolver.query(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, projection, null, null, null); // Then walk thru result and obtain imageId from records for (thumbnails.moveToFirst(); !thumbnails.isAfterLast(); thumbnails.moveToNext()) { String imageId = thumbnails.getString(thumbnails.getColumnIndex(Thumbnails.IMAGE_ID)); // Request image related to this thumbnail String[] filePathColumn = { MediaStore.Images.Media.DATA }; Cursor images = contentResolver.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, filePathColumn, MediaStore.Images.Media._ID + "=?", new String[] {imageId}, null); if (cursor != null && cursor.moveToFirst()) { // Your file-path will be here String filePath = cursor.getString(cursor.getColumnIndex(filePathColumn[0])); } } //Of course you need to restrict queries using selection and selection args params and get only rows that you really need

从android上的缩略图查询获取图像

1 个答案: