Java tutorial
//package com.java2s; import android.content.Context; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; public class Main { public static void writeFile(Context context, String text, String fileName) { try { FileOutputStream fos = context.openFileOutput(fileName, Context.MODE_APPEND); fos.write(text.getBytes()); fos.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }