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package com.example.dell.apacheopennlp;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import java.io.IOException;
import java.io.InputStream;
import opennlp.tools.namefind.NameFinderME;
import opennlp.tools.namefind.TokenNameFinderModel;
import opennlp.tools.tokenize.TokenizerME;
import opennlp.tools.tokenize.TokenizerModel;
import opennlp.tools.util.Span;
public class apacheOpenNLP extends AppCompatActivity 

 @Override
 protected void onCreate(Bundle savedInstanceState) 
 super.onCreate (savedInstanceState);
 setContentView (R.layout.activity_apache_open_nlp);
 final TextView txt = (TextView) findViewById (R.id.txtView);

 InputStream inputStream = null;
 TokenizerModel tokenModel =null;
 try
 inputStream = getAssets().open("en-token.bin");
 tokenModel = new TokenizerModel (inputStream);
 inputStream.close();
 catch (IOException e) 
 e.printStackTrace();
 txt.setText (e.toString ()+" inside catch of token");
 

 if(tokenModel!=null) 
 TokenizerME tokenizer = new TokenizerME (tokenModel);
 String paragraph = "Tutorialspoint is located in Hyderabad";
 String tokens = tokenizer.tokenize (paragraph);
 InputStream locationInputStream=null;
 TokenNameFinderModel locationModel = null;

 try 

 locationInputStream = getAssets ( ).open ("en-ner-location.bin");
 locationModel = new TokenNameFinderModel (locationInputStream);

 catch (IOException e) 
 e.printStackTrace ( );
 txt.setText (e.toString ()+" inside catch of location");
 

 if (locationModel != null) 
 NameFinderME nameFinder = new NameFinderME (locationModel);
 Span nameSpans = nameFinder.find (tokens);

 String result = null;
 for (Span s : nameSpans)
 //result= s.toString()+" "+tokens[s.getStart()];
 result += s.toString ( );
 txt.setText (result);
 
 else
 // txt.setText ("Location model is empty");
 
 
 

I am using the apache OpenNLP to extract the location in a sentence. I have debug the code and found that after NameFinderME nameFinder = new NameFinderME (locationModel); the android app crash showing a message "The app has stopped working"
How can I resolve this issue?

Can you try to change the nameFinder to be declared as TokenNameFinder interface type?

Just try to replace

NameFinderME nameFinder = null

with

TokenNameFinder nameFinder = null

Rest all should be same.