android reading from a text file

Question

I have a java class where it reads some data from a text file using a buffered reader and returns that data as a hash map:

import java.io.BufferedReader;
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Answer 1

This is searching for a needle in the hay stack.

I recommend you to first learn how to use debugging in Android:
http://www.droidnova.com/debugging-in-android-using-eclipse,541.html

Also some exception handling wouldn't hurt:
http://en.wikibooks.org/wiki/Java_Programming/Throwing_and_Catching_Exceptions

The following line of code is very wrong, and it seems you don't understand file storage in android:

new FileReader("unigramFrequencies.txt")

Here it is explained:
http://developer.android.com/guide/topics/data/data-storage.html

Answer 2

I think the error might well be there :

BufferedReader bf = new BufferedReader(new FileReader("unigramFrequencies.txt"));

You should provide an absolute path here and first make sure that the file exists before accessing it or handle the exception.

If this file is some final asset, you should place it in your project assets folder and get a filereader from there.

Example (from here):

AssetFileDescriptor descriptor = getAssets().openFd("unigramFrequencies.txt");
FileReader reader = new FileReader(descriptor.getFileDescriptor());

Note that your unigramFrequencies.txt file should be present in your <project>/assets/ directory

Answer 3

without a bit of logcat it is a bit trivial.

 unigramFrequencies.put(splittedLine[0].trim(), Double.parseDouble(splittedLine[1].trim()))

here for instance could be raised a null pointer execption if splittedLine[0] or splittedLine[1] is null, or parseDouble could arise a number format execption