问大文本文件加载在android上不起作用

EN

public void loadTextFile(String textFileName, ArrayList<String> dictionary) 
{
AssetManager assetManager = getAssets(); //files manager
//reader = public bufferedReader
//word = public String
//dictionary = public ArrayList<String>

//load file to buffer
try {
reader = new BufferedReader(new InputStreamReader(assetManager.open(textFileName)));
} catch (IOException e1) {
e1.printStackTrace();
}
word = " "; 
//loop, save words from buffer to dictionary
while(word != null)
{
try {
  word = reader.readLine();
} catch (IOException e) {
  e.printStackTrace();
  word = null;
}
if (word != null) {
  dictionary.add(word);
}
}//end while
//buffer close
try {
reader.close();
} catch (IOException e1) {
e1.printStackTrace();
}

} //end function