Java tutorial
//package com.java2s; import java.io.DataOutputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import android.content.Context; public class Main { public static void secSet(Context context, String key, String val) { //long now = System.currentTimeMillis(); FileOutputStream fos = null; try { DataOutputStream dos = new DataOutputStream( (fos = context.openFileOutput(key + ".mits", android.content.Context.MODE_PRIVATE))); dos.writeUTF(val); } catch (FileNotFoundException e1) { //e1.printStackTrace(); } catch (IOException e1) { //e1.printStackTrace(); } finally { if (fos != null) try { fos.close(); } catch (IOException ignored) { } } } }