我可以从MySQL数据库中获取字符数据，如下图所示，但是当我从数据库中获取BLOB图像时，它显示空值。
你可以帮助我解决这个问题，通过PHP从MySQL获取图像到使用Volley的ANDROID并在IMAGEVIEW中显示它
PHP
session_start();
define('DB_USER','********');
define('DB_PASSWORD','********');
define('DB_HOST','*******');
define('DB_NAME','*********');
$dbc=@mysql_connect(DB_HOST,DB_USER,DB_PASSWORD)or die(mysql_error());
//echo "database";
mysql_select_db(DB_NAME)or die(mysql_error());
$result=mysql_query("SELECT * FROM disco_detail");
while($row=mysql_fetch_assoc($result))
{
$output[]=$row;
}
print(json_encode($output));
输出
[{＆＃34; disco_name＆＃34;：＆＃34;摩卡咖啡＆amp;对话＆＃34;，＆＃34; disco_address＆＃34;：＆＃34; 28A，防御殖民地市场，新德里＆＃34;，＆＃34; disco_phone＆＃34;：＆＃34; 0＆＃34;，＆＃ 34; disco_offer＆＃34;：＆＃34; 30％的饮料＆＃34;，＆＃34; disco_city＆＃34;：＆＃34;新德里＆＃34;，＆＃34;纬度＆＃34;：＆＃ 34; 28.531256＆＃34;＆＃34;经度＆＃34;：＆＃34; 77.146764＆＃34;＆＃34; disco_image＆＃34;：空}，{＆＃34; disco_name＆＃34;：＆ ＃34; Capitol＆＃34;，＆＃34; disco_address＆＃34;：＆＃34; 50-B，Ashok Hotel，Niti Marg，Chanakyapuri，New Delhi＆＃34;，＆＃34; disco_phone＆＃34;：＆＃ 34; 0＆＃34;，＆＃34; disco_offer＆＃34;：＆＃34; 10％的食品折扣＆＃34;，＆＃34; disco_city＆＃34;：＆＃34;新德里＆＃34;，＆＃ 34;纬度＆＃34;：＆＃34; 28.597192＆＃34;＆＃34;经度＆＃34;：＆＃34; 77＆＃34;＆＃34; disco_image＆＃34;：空}，{＆＃ 34; disco_name＆＃34;：＆＃34; Kota House＆＃34;，＆＃34; disco_address＆＃34;：＆＃34; Shahjahan Road，Khan Market，Lodhi Estate，New Delhi＆＃34;，＆＃34; disco_phone＆ ＃34;：＆＃34; 0＆＃34;，＆＃34; disco_offer＆＃34;：＆＃34;免费参赛＆＃34;，＆＃34; disco_city＆＃34;：＆＃34;新德里＆＃34; ＆＃34;纬度＆＃34;：＆＃34; 29＆＃34;＆＃34;经度＆＃34;：＆＃34; 77＆＃34;＆＃34;盘o_image＆＃34;：null}，{＆＃34; disco_name＆＃34;：＆＃34; Etal＆＃34;，＆＃34; disco_address＆＃34;：＆＃34; Level-II，MGF City Square Mall，Rajouri Garden，New Delhi＆＃34;，＆＃34; disco_phone＆＃34;：＆＃34; 0＆＃34;，＆＃34; disco_offer＆＃34;：＆＃34; Bar＆＃34;＆＃3折5％ 34; disco_city＆＃34;：＆＃34;新德里＆＃34;，＆＃34;纬度＆＃34;：＆＃34; 29＆＃34;，＆＃34;经度＆＃34;：＆＃34; 77＆＃ 34;，＆＃34; disco_image＆＃34;：＆＃34;＆＃34;}，{＆＃34; disco_name＆＃34;：＆＃34;水烟＆＃34;＆＃34; disco_address＆＃34 ;: ＆＃34; Basant Block，Vasant Vihar，新德里＆＃34;＆＃34; disco_phone＆＃34;：＆＃34; 0＆＃34;，＆＃34; disco_offer＆＃34;：＆＃34; 20％折扣在Hookah＆＃34;，＆＃34; disco_city＆＃34;：＆＃34;新德里＆＃34;，＆＃34;纬度＆＃34;：＆＃34; 29＆＃34;，＆＃34;经度＆＃34 ;：＆＃34; 77＆＃34;＆＃34; disco_image＆＃34;：＆＃34;＆＃34;}，{＆＃34; disco_name＆＃34;：＆＃34; DISCOTHEQUE＆＃34;，＆ ＃34; disco_address＆＃34;：＆＃34; Ranjit Avenue，Amritsar＆＃34;，＆＃34; disco_phone＆＃34;：＆＃34; 0＆＃34;，＆＃34; disco_offer＆＃34;：＆＃34 ;免费参赛＆＃34;，＆＃34; disco_city＆＃34;：＆＃34; Amritsar＆＃34;，＆＃34;纬度＆＃34;：＆＃34; 0＆＃34;，＆＃34;经度＆＃34 ;：＆＃34; 0＆＃34;＆＃34; disco_imag e＆＃34;：＆＃34;＆＃34;}，{＆＃34; disco_name＆＃34;：＆＃34; Kcet＆＃34;，＆＃34; disco_address＆＃34;：＆＃34; Ranjit Avenue， Amritsar＆＃34;，＆＃34; disco_phone＆＃34;：＆＃34; 999999974＆＃34;，＆＃34; disco_offer＆＃34;：＆＃34; 750/750项目中的标记＆＃34;，＆＃34; disco_city＆＃34;：＆＃34;阿姆利则＆＃34;＆＃34;纬度＆＃34;：＆＃34; 0＆＃34;＆＃34;经度＆＃34;：＆＃34; 0＆＃34 ;, ＆＃34; disco_image＆＃34;：＆＃34;＆＃34;}]