io - read file from assets android -

i'm trying build card viewer in android trading card game. plan use arraylist populate cards database. read in values file , displayed via listview. listview code , arraylist code fine (after testing without using file input). problem occurs when attempt read in file. i'm @ loss of do. when run program this, crashes. when remove "parseint" method (because i'm reading in integer file), runs, none of data populated. wrong io code?

    import android.content.intent;     import android.support.v7.app.actionbaractivity;     import android.os.bundle;      import java.util.arraylist;     import java.io.*;      import android.widget.arrayadapter;     import android.widget.listview;       public class deckbuilderactivity extends actionbaractivity {       @override      protected void oncreate(bundle savedinstancestate) {      intent intent = getintent();      super.oncreate(savedinstancestate);      setcontentview(r.layout.activity_deck_builder);      //populate       database************************************************************************     arraylist<card> database = new arraylist<card>(); //create new arraylist of datatype card      //value holders     string cardname, expansion, cardnum, unittype, unitclan, unitrace, trigger, unitskill, cardlore,             imageid;     int unitgrade, unitpower, unitshield;     //exception handling      try{         string myfile = "cardmaindatabase.txt";         inputstream inputreader = getassets().open(myfile);         bufferedreader reader = new bufferedreader(new inputstreamreader(inputreader)); //open file         //begin populating loop         int = 0; //incrementer         while(reader.readline() != null) //while not end of file         {             //assign values placeholders              //add new card , take parameters             database.add(new card());             database.get(i).setcardname(reader.readline());             database.get(i).setexpansion(reader.readline());             database.get(i).setcardnum(reader.readline());             database.get(i).setunitgrade(integer.parseint(reader.readline()));              }     } catch (ioexception e) {         e.printstacktrace();     }     //******************************************************************************************     //populate arraylist     arrayadapter<card> adapter = new arrayadapter(this, android.r.layout.simple_list_item_1, database);     listview lv = (listview) findviewbyid(r.id.card_database_listview);     lv.setadapter(adapter);   } 

        stringbuffer stringbuffer = new stringbuffer();          try {              inputstream = mcontext.getresources().getassets().open("your-file-path");             bufferedreader br = new bufferedreader(new inputstreamreader(is, "utf-8"));             string line;              while ((line = br.readline()) != null) {                 //play each line here              } }... 

try code data assets.

or if don't want clear code. try modify code this. think problem in loop.

string line = null;  while((line = reader.readline()) != null) //while not end of file         {             //play each line here          } 

but collecting/storing data unstable , hard maintain. i'll suggest use json. store data in asset,so able collect , store data fast possible.