android - File to inputStream for FTP upload returns NullPointerExeption -

i'm trying upload file ftp have trouble inputstream. returns java.lang.nullpointerexception.

how load file inputsteam?

also no progress reports. onprogressupdate never executed, why?

my code

private class asyncftp extends asynctask<string, string, string>{          @override         protected string doinbackground(string... params) {              publishprogress("entro");              //creo ftpclient             ftpclient ftp = new ftpclient();             //defino datos del servidor             string ftp_host = "not real ip";             string ftp_user = "not real user";             string ftp_pass = "not real pass";              //cargo el archivo             file file = new file("/data/data/com.lstupenengo.mysql/files/xx.xx");             fileinputstream fis = null;             try {                 fis = new fileinputstream(file);             } catch (filenotfoundexception e) {                 e.printstacktrace();             }              publishprogress("file ");             //conectar             try{                 publishprogress("conectando");                 ftp.connect(ftp_host, 21);                 ftp.login(ftp_user, ftp_pass);                 publishprogress("conecto " + string.valueof(ftp.getreplycode()));                 ftp.type(ftpclient.binary_file_type);                   //directorio                 ftp.changeworkingdirectory("/public_html/");                  publishprogress("directorio"+string.valueof(ftp.getreplycode()));                 ftp.enterlocalpassivemode();                 ftp.storefile("xx.xx",fis);                 publishprogress("subio "+string.valueof(ftp.getreplycode()));                } catch (ioexception e) {                 e.printstacktrace();             }             return null;         }          protected void onprogressupdate(string txt) {             tv.settext(tv.gettext()+"\n"+txt);         }          @override         protected void onpostexecute(string result){             tv.settext(tv.gettext()+"\n termino ftp");         }     } 

logcat

 opengl es shader compiler version: 17.01.12.spl     build date: 07/01/14 tue     local branch:     remote branch: quic/kk_2.7_rb1.41     local patches: none     reconstruct branch: au_linux_android_kk_2.7_rb1.04.04.04.007.064 +  nothing 12-16 08:12:46.964    9262-9262/com.lstupenengo.mysql d/openglrenderer﹕ enabling debug mode 0 12-16 08:12:47.084    9262-9262/com.lstupenengo.mysql i/activitymanager﹕ timeline: activity_idle id: android.os.binderproxy@44bd9f08 time:324929151 12-16 08:12:55.142    9262-9262/com.lstupenengo.mysql w/iinputconnectionwrapper﹕ showstatusicon on inactive inputconnection 12-16 08:12:57.344    9262-9400/com.lstupenengo.mysql i/roottools v3.1﹕ [rw, seclabel, nosuid, nodev, relatime, discard, noauto_da_alloc, data=ordered] , rw 12-16 08:12:57.534    9262-9262/com.lstupenengo.mysql i/activitymanager﹕ timeline: activity_idle id: android.os.binderproxy@44bd9f08 time:324939608 12-16 08:12:57.885    9262-9400/com.lstupenengo.mysql i/roottools v3.1﹕ [rw, seclabel, nosuid, nodev, relatime, discard, noauto_da_alloc, data=ordered] , ro 12-16 08:12:57.995    9262-9400/com.lstupenengo.mysql i/roottools v3.1﹕ [rw, seclabel, nosuid, nodev, relatime, discard, noauto_da_alloc, data=ordered] , rw 12-16 08:12:58.115    9262-9400/com.lstupenengo.mysql i/roottools v3.1﹕ [rw, relatime] , rw 12-16 08:12:58.215    9262-9400/com.lstupenengo.mysql i/roottools v3.1﹕ [ro, relatime] , ro 12-16 08:12:58.756    9262-9400/com.lstupenengo.mysql i/roottools v3.1﹕ [rw, seclabel, nosuid, nodev, relatime, discard, noauto_da_alloc, data=ordered] , ro 12-16 08:12:58.776    9262-9400/com.lstupenengo.mysql w/system.err﹕ java.io.filenotfoundexception: /data/data/com.lstupenengo.mysql/files/wa.db: open failed: eacces (permission denied) 12-16 08:12:58.786    9262-9400/com.lstupenengo.mysql w/system.err﹕ @ libcore.io.iobridge.open(iobridge.java:418) 12-16 08:12:58.786    9262-9400/com.lstupenengo.mysql w/system.err﹕ @ java.io.fileinputstream.<init>(fileinputstream.java:78) 12-16 08:12:58.786    9262-9400/com.lstupenengo.mysql w/system.err﹕ @ com.lstupenengo.mysql.mainactivity$asyncftp.doinbackground(mainactivity.java:97) 12-16 08:12:58.786    9262-9400/com.lstupenengo.mysql w/system.err﹕ @ com.lstupenengo.mysql.mainactivity$asyncftp.doinbackground(mainactivity.java:76) 12-16 08:12:58.786    9262-9400/com.lstupenengo.mysql w/system.err﹕ @ android.os.asynctask$2.call(asynctask.java:288) 12-16 08:12:58.786    9262-9400/com.lstupenengo.mysql w/system.err﹕ @ java.util.concurrent.futuretask.run(futuretask.java:237) 12-16 08:12:58.786    9262-9400/com.lstupenengo.mysql w/system.err﹕ @ android.os.asynctask$serialexecutor$1.run(asynctask.java:231) 12-16 08:12:58.786    9262-9400/com.lstupenengo.mysql w/system.err﹕ @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1112) 12-16 08:12:58.786    9262-9400/com.lstupenengo.mysql w/system.err﹕ @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:587) 12-16 08:12:58.786    9262-9400/com.lstupenengo.mysql w/system.err﹕ @ java.lang.thread.run(thread.java:841) 12-16 08:12:58.786    9262-9400/com.lstupenengo.mysql w/system.err﹕ caused by: libcore.io.errnoexception: open failed: eacces (permission denied) 12-16 08:12:58.786    9262-9400/com.lstupenengo.mysql w/system.err﹕ @ libcore.io.posix.open(native method) 12-16 08:12:58.786    9262-9400/com.lstupenengo.mysql w/system.err﹕ @ libcore.io.blockguardos.open(blockguardos.java:110) 12-16 08:12:58.786    9262-9400/com.lstupenengo.mysql w/system.err﹕ @ libcore.io.iobridge.open(iobridge.java:402) 12-16 08:12:58.786    9262-9400/com.lstupenengo.mysql w/system.err﹕ ... 9 more 12-16 08:13:00.577    9262-9400/com.lstupenengo.mysql w/dalvikvm﹕ threadid=15: thread exiting uncaught exception (group=0x41a32d88) 12-16 08:13:00.587    9262-9400/com.lstupenengo.mysql e/androidruntime﹕ fatal exception: asynctask #5     process: com.lstupenengo.mysql, pid: 9262     java.lang.runtimeexception: error occured while executing doinbackground()             @ android.os.asynctask$3.done(asynctask.java:300)             @ java.util.concurrent.futuretask.finishcompletion(futuretask.java:355)             @ java.util.concurrent.futuretask.setexception(futuretask.java:222)             @ java.util.concurrent.futuretask.run(futuretask.java:242)             @ android.os.asynctask$serialexecutor$1.run(asynctask.java:231)             @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1112)             @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:587)             @ java.lang.thread.run(thread.java:841)      caused by: java.lang.nullpointerexception             @ org.apache.commons.net.io.util.copystream(util.java:100)             @ org.apache.commons.net.ftp.ftpclient._storefile(ftpclient.java:653)             @ org.apache.commons.net.ftp.ftpclient.__storefile(ftpclient.java:624)             @ org.apache.commons.net.ftp.ftpclient.storefile(ftpclient.java:1976)             @ com.lstupenengo.mysql.mainactivity$asyncftp.doinbackground(mainactivity.java:117)             @ com.lstupenengo.mysql.mainactivity$asyncftp.doinbackground(mainactivity.java:76)             @ android.os.asynctask$2.call(asynctask.java:288)             @ java.util.concurrent.futuretask.run(futuretask.java:237)             at android.os.asynctask$serialexecutor$1.run(asynctask.java:231)             at java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1112)             at java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:587)             at java.lang.thread.run(thread.java:841) 

your onprogressupdate doesn't override, needs parameter (params... param) , not single string.

this definition.

protected void onprogressupdate (progress... values) 

so need

protected void onprogressupdate (string... values) 

and string values[0] if put 1 string parameter in publishprogress.

by other hand, exception, it's hard without stacktrace check if fis null before storing file. nullpointers easy fix. anyway have small tutorial here