Java tutorial
//package com.java2s; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import android.graphics.Bitmap; import android.graphics.Bitmap.CompressFormat; public class Main { private static void saveBitmap2TempFile(File file, Bitmap bitmap) { ByteArrayOutputStream bos = new ByteArrayOutputStream(); bitmap.compress(CompressFormat.JPEG, 70 /* ignored for PNG */, bos); byte[] bitmapdata = bos.toByteArray(); // write the bytes in file FileOutputStream fos = null; try { fos = new FileOutputStream(file); fos.write(bitmapdata); fos.flush(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { try { fos.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }