图像存储在SD卡的路径是已知的Andr​​oid开缩略图 [英] android get thumbnail of image stored on sdcard whose path is known

问题描述

都说我是个形象店，在路径到/ mnt /图片/ abc.jpg。我如何生成的缩略图位图这一形象系统。我知道如何从它的URI图像的缩略图，而不是从它的文件路径

Say I have an image stores at path "/mnt/images/abc.jpg". How do I get the system generated thumbnail bitmap for this image. I know how to get the thumbnail of an image from its Uri, but not from its file-path

推荐答案

您可以用这个试试：

public static Bitmap getThumbnail(ContentResolver cr, String path) throws Exception {

    Cursor ca = cr.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, new String[] { MediaStore.MediaColumns._ID }, MediaStore.MediaColumns.DATA + "=?", new String[] {path}, null);
    if (ca != null && ca.moveToFirst()) {
        int id = ca.getInt(ca.getColumnIndex(MediaStore.MediaColumns._ID));
        ca.close();
        return MediaStore.Images.Thumbnails.getThumbnail(cr, id, MediaStore.Images.Thumbnails.MICRO_KIND, null );
    }

    ca.close();
    return null;

}

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