Попробуй так:
try
{
InputStream instream = openFileInput("myfilename.txt");
if (instream)
{
InputStreamReader inputreader = new InputStreamReader(instream);
BufferedReader buffreader = new BufferedReader(inputreader);
String line, text = "";
while ((line = buffreader.readLine()))
{
text = text + line;
}
}
instream.close();
}
catch (java.io.FileNotFoundException e)
{
}