android - EBADF (Bad file number) on inputstream I/O -

i have error

java.io.ioexception: read failed: ebadf (bad file number)

on line of code:

 while ((input = fis.read(buffer)) != -1) { 

what think cause ebadf bad file number error on line? ideas on how fix it. wanted working stream read in pdf file sd , read put on sd card again different name.

stack trace

07-15 18:47:38.952: w/system.err(2220): java.io.ioexception: read failed: ebadf (bad file number) 07-15 18:47:38.962: w/system.err(2220): @ libcore.io.iobridge.read(iobridge.java:432) 07-15 18:47:38.962: w/system.err(2220): @ java.io.fileinputstream.read(fileinputstream.java:179) 07-15 18:47:38.962: w/system.err(2220):     @ java.io.inputstream.read(inputstream.java:163) 07-15 18:47:38.962: w/system.err(2220):     @ com.example.fileionottext.mainactivity.pdfinandout(mainactivity.java:95) 07-15 18:47:38.962: w/system.err(2220):     @ com.example.fileionottext.mainactivity$1.onclick(mainactivity.java:47) 07-15 18:47:38.962: w/system.err(2220):     @ android.view.view.performclick(view.java:3531) 07-15 18:47:38.962: w/system.err(2220):     @ android.view.view$performclick.run(view.java:14224) 07-15 18:47:38.962: w/system.err(2220):     @ android.os.handler.handlecallback(handler.java:605) 07-15 18:47:38.962: w/system.err(2220):     @ android.os.handler.dispatchmessage(handler.java:92) 07-15 18:47:38.962: w/system.err(2220):     @ android.os.looper.loop(looper.java:137) 07-15 18:47:38.962: w/system.err(2220):     @ android.app.activitythread.main(activitythread.java:4699) 07-15 18:47:38.962: w/system.err(2220):     @ java.lang.reflect.method.invokenative(native method) 07-15 18:47:38.962: w/system.err(2220):     @ java.lang.reflect.method.invoke(method.java:511) 07-15 18:47:38.962: w/system.err(2220):     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:790) 

the rest of code

        public void pdfinandout() throws filenotfoundexception, ioexception         {             try {                 fileoutputstream fos = null;                 file file2;                  file2 = new file("/mnt/sdcard/replacementpdf.pdf");                  // string filename = "testerpdfcopy.pdf";                 try {                     if (!file2.exists()) {                         file2.createnewfile();                     }                     fos = new fileoutputstream(file2);                 }                 catch (exception e1) {                     // todo auto-generated catch block                     e1.printstacktrace();                 }                 fileinputstream fis = null;                 byte[] buffer = new byte[888192];                  file filein;                 filein = new file("/mnt/sdcard/temppdf.pdf");                  fis = new fileinputstream(filein);                  int input = 0;                  while ((input = fis.read(buffer)) != -1) { // <<-- stack trace error                     fos.write(buffer, 0, input);                     log.i("<<<<<>>>>", "fos2 is; " + buffer[7]);                     try {                         fos.flush();                         fos.close();                         fis.close();                     }                     catch (ioexception e) {                         // todo auto-generated catch block                         e.printstacktrace();                     }                 }             }             textviewone.settext(string.valueof(input));         }         catch (exception e) {             // todo auto-generated catch block             e.printstacktrace();         }     } } 

while ((input = fis.read(buffer)) != -1) { // <<-- stack trace error     fos.write(buffer, 0, input); 

either must }, right? or fis.close executed, , error occur.

log.i("<<<<<>>>>", "fos2 is; " + buffer[7]);  try {     fos.flush();     fos.close();     fis.close(); }  catch (ioexception e) {     // todo auto-generated catch block     e.printstacktrace(); }