Java tutorial
//package com.java2s; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import android.app.Activity; import android.content.Context; import android.graphics.Bitmap; public class Main { public static String saveToPrivateFile(Activity activity, String filename, Bitmap bmp) { FileOutputStream fos; try { fos = activity.openFileOutput(filename, Context.MODE_PRIVATE); bmp.compress(Bitmap.CompressFormat.PNG, 100, fos); fos.close(); return filename; } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); return ""; } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); return ""; } } }