Java tutorial
//package com.java2s; import android.app.Activity; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; public class Main { static public Activity _context; public static void writeBuffer2InternalStorage(String path, byte[] data) { File file = new File(_context.getFilesDir() + File.separator + path); try { FileOutputStream outstream; if (!file.exists()) { file.createNewFile(); } outstream = new FileOutputStream(file); outstream.write(data); outstream.close(); } catch (IOException e) { e.printStackTrace(); } } }