? ? FileInputStream fis = null;

fis = openFileInput("a.txt");

? ? ByteArrayOutputStream baos = new ByteArrayOutputStream();

? ? byte [] buffer = new byte[1024];

? ? int len=0;

? ?

while((len=fis.read(buffer))!=-1){

baos.write(buffer, 0, len);

? ? content = baos.toString();

? ?

fis.close();

baos.close();

? ? return content;