（Android）如何以编程方式更改已存储在库中的图像的名称

Question

我正在制作一个应用程序，我必须上传已经存储在AWS服务器库中的图片。问题是我必须根据时间戳命名这些图片，即。它们被上传的时间。下面是用于从图库中获取图像的代码。 Beginupload是用于在AWS桶中上传图像的方法。

global $wpdb;
/* wpdb class should not be called directly.global $wpdb variable is an instantiation of the class already set up to talk to the WordPress database */
$result=$wpdb->get_results("SELECT * FROM wp_posts "); /* multiple row results can be pulled from the database with get_results function and outputs an object which is stored in $result */
//echo "<pre>"; print_r($result); echo "</pre>";
/* If you require you may print and view the contents of $result object */
echo "ID" . "  " . "post_title" . "<br><br>";
foreach ($result as $row)
{
    echo $row->id . "  " . $row->name . "<br>";
}
/* Print the contents of $result looping through each row returned in the result */