Generate WMS GetFeatureInfo URL manually

[am2]

I am going to use wms getfeatureinfo to get information of a layer without any liberary..

In fact I am using Android and Could not find anything to do that for me,So I have to get information from a manually generated URL.

I have seen WMS refrence and could find requiered parameters to request from geoserver.Here is the refrence I tried to build an example url for a feature that is located in position of 

7547018.12374 -3645681.16486

 in 

ESPG 3857

 My layer name is Hazard:point_4326 and I set the bbox and height and width as 

bbox=-2.002637639E7,-2.00489661E7,2.002637639E7,2.00489661E7&width=767&height=768 

but It gives me 

no features were found

 I think the problem is with setting bbox..Here is the url that I used

http://151.80.201.170/geoserver/Hazard/wms?request=GetFeatureInfo&service=WMS&version=1.1.1&layers=Hazard:point_4326&styles=&srs=EPSG%3A3875&format=image%2Fpng&bbox=-2.002637639E7,-2.00489661E7,2.002637639E7,2.00489661E7&width=767&height=768&query_layers=Hazard:point_4326&info_format=text%2Fplain&feature_count=50&x=0&y=0&exceptions=application%2Fvnd.ogc.se_xml

and this is working openlayer url

Can you please help me find out where I am doing wrong?thank you so much

Edited June 22, 2015 by am2

[am2]

Any Help?!

[willywang]

This link is used for search features in WFS, may be a not bad references to you:

http://www.supergeotek.com/forum/Default.aspx?g=posts&t=225

 

I also met the similar problems in search features with ogc service. In WFS, it has 

to input the query parameters in OGC formal format, like xml format rather than

SQL query url types.

[willywang]

and also this link. It talked about the encode for querying the ogc service:

http://www.supergeotek.com/forum/Default.aspx?g=posts&t=206