Java tutorial
//package com.java2s; //License from project: Open Source License import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import android.graphics.Bitmap; public class Main { /** * Compress the bitmap to a PNG and return its {@link ByteArrayInputStream} * * @param bitmap The {@link Bitmap} to compress * @return The {@link ByteArrayInputStream} */ public static ByteArrayInputStream toPNGInputStream(Bitmap bitmap) { ByteArrayOutputStream bytes = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.PNG, 100, bytes); return new ByteArrayInputStream(bytes.toByteArray()); } }