java - Android saving to external SD card? -

hey guys can tell me why cannot save file external sd? can check on code?

 public void download()   {       try {             //this file want download remote server             string path ="http://mozilla.cdn.leaseweb.com/firefox/releases/4.0.1/win32/en-us/firefox%20setup%204.0.1.exe";             //this name of local file create             string targetfilename;                 boolean eof = false;             url u = new url(path);             httpurlconnection c = (httpurlconnection) u.openconnection();             c.setrequestmethod("get");             c.setdooutput(true);             c.connect();              //string svto = environment.getexternalstoragestate().tostring();             file path1 = environment.getexternalstoragepublicdirectory(                     environment.directory_pictures);              path1.mkdirs();             fileoutputstream f = new fileoutputstream(new file(path1+"/fox.exe"));                 inputstream in = c.getinputstream();                 byte[] buffer = new byte[1024];                 int len1 = 0;                 while ( (len1 = in.read(buffer)) !=  -1 ) {                 f.write(buffer,0, len1);                          }             f.close();             } catch (malformedurlexception e) {             // todo auto-generated catch block             e.printstacktrace();             } catch (protocolexception e) {             // todo auto-generated catch block             e.printstacktrace();             } catch (filenotfoundexception e) {             // todo auto-generated catch block             e.printstacktrace();             } catch (ioexception e) {             // todo auto-generated catch block             e.printstacktrace();         }    } 

this operation fail if don't have following permissions in androidmanifest.xml file:

    <uses-permission android:name="android.permission.write_external_storage" />     <uses-permission android:name="android.permission.internet" /> 

make sure put them within top-level <manifest> tag, not <application> tag activities specified.