commit b1893edae5c8b9e4fbcae32d67890d9ebeb4f316
Author: Dominika Liberda <ja@sdomi.pl>
Date:   Thu Dec 24 06:29:01 2020 +0100

    Initial

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/LICENSE
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+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/Launcher.java b/Launcher.java
new file mode 100644
index 0000000..07fc714
--- /dev/null
+++ b/Launcher.java
@@ -0,0 +1,23 @@
+import java.io.File;
+import java.util.Arrays;
+import java.util.List;
+
+class Launcher {
+	public static void main(String[] args) {
+        System.out.println("why android-sdk, why");
+        if (args.length > 0) {
+        	File in = new File(args[0]);
+        	File out = new File(args[1]);
+        	align(in, out);
+        } else {
+        	System.out.println("Usage: java -jar ZipAlign.jar <in.apk> <out.apk>");
+        }
+    }
+	private static void align(File apkPath, File output) {
+		try {
+			new ZipAlign.ZipAligner(apkPath, output).run();
+		} catch (Exception exception) {
+			throw new RuntimeException(exception);
+		}
+	}
+}
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..336003f
--- /dev/null
+++ b/README.md
@@ -0,0 +1,9 @@
+# ZipAlign Java
+
+Port of android-sdk's zipalign from C++ to Java, taken from [testfairy-uploader](https://github.com/testfairy/testfairy-uploader/blob/master/src/main/java/com/testfairy/uploader/ZipAligner.java) repository.
+
+Launch `build.sh` to build. Needs JDK, unzip, wget. You can also obtain a JAR file from the releases section.
+
+# ChangeLog
+
+1.0.0 (24.12.20) - Adapted code for standalone execution, first version.
diff --git a/ZipAlign.java b/ZipAlign.java
new file mode 100644
index 0000000..8c99b27
--- /dev/null
+++ b/ZipAlign.java
@@ -0,0 +1,822 @@
+/*
+ *    Copyright (C) 2012 Hai Bison
+ *
+ *    See the file LICENSE at the root directory of this project for copying
+ *    permission.
+ */
+
+import org.apache.commons.io.IOUtils;
+
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.FilterOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.RandomAccessFile;
+import java.nio.file.Files;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.Enumeration;
+import java.util.GregorianCalendar;
+import java.util.List;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+import java.util.zip.ZipOutputStream;
+
+/**
+ * ZipAlign.
+ * <p>
+ * This file is ported from <a href=
+ * "https://android.googlesource.com/platform/build/+/master/tools/zipalign/"
+ * >AOSP's ZipAlign</a> tool.
+ * </p>
+ * <p>
+ * <h1>Quote from original README</h1>
+ * </p>
+ * <p>
+ *
+ * <pre>
+ * The purpose of zipalign is to ensure that all uncompressed data starts
+ * with a particular alignment relative to the start of the file.  This
+ * allows those portions to be accessed directly with mmap() even if they
+ * contain binary data with alignment restrictions.
+ *
+ * Some data needs to be word-aligned for easy access, others might benefit
+ * from being page-aligned.  The adjustment is made by altering the size of
+ * the "extra" field in the zip Local File Header sections.  Existing data
+ * in the "extra" fields may be altered by this process.
+ *
+ * Compressed data isn't very useful until it's uncompressed, so there's no
+ * need to adjust its alignment.
+ *
+ * Alterations to the archive, such as renaming or deleting entries, will
+ * potentially disrupt the alignment of the modified entry and all later
+ * entries.  Files added to an "aligned" archive will not be aligned.
+ * </pre>
+ *
+ * </p>
+ * <p>
+ * <h1>Notes</h1>
+ * </p>
+ * <p>
+ * <ul>
+ * <li>The tool modifies the "extra" field of all entries which are not
+ * compressed ({@link ZipEntry#STORED}).</li>
+ *
+ * <li>Only the "extra" fields in local file headers are modified. The ones in
+ * central directory are not touched.</li>
+ * </ul>
+ * </p>
+ * <p>
+ * See <a href="http://en.wikipedia.org/wiki/Zip_(file_format)">Zip (file
+ * format) - Wikipedia</a> for further information..
+ * </p>
+ *
+ * @author Hai Bison
+ * @since v1.6.9 beta
+ */
+class ZipAlign {
+
+	/**
+	 * The minimum size of a ZIP entry's header.
+	 */
+	public static final int ZIP_ENTRY_HEADER_LEN = 30;
+
+	/**
+	 * Default version to work with ZIP files.
+	 */
+	public static final int ZIP_ENTRY_VERSION = 20;
+
+	/**
+	 * The offset of extra field length in a ZIP entry's header.
+	 */
+	public static final int ZIP_ENTRY_OFFSET_EXTRA_LEN = 28;
+
+	/**
+	 * The size of field extra length, in a ZIP entry's header.
+	 */
+	public static final int ZIP_ENTRY_FIELD_EXTRA_LEN_SIZE = 2;
+
+	/**
+	 * @see <a
+	 * href="https://android.googlesource.com/platform/build/+/master/tools/zipalign/ZipEntry.h">ZipEntry.h</a>
+	 */
+	public static final int ZIP_ENTRY_USES_DATA_DESCR = 0x0008;
+
+	/**
+	 * @see <a
+	 * href="https://android.googlesource.com/platform/build/+/master/tools/zipalign/ZipEntry.h">ZipEntry.h</a>
+	 */
+	public static final int ZIP_ENTRY_DATA_DESCRIPTOR_LEN = 16;
+
+	/**
+	 * Default alignment value.
+	 * <p>
+	 * See <a
+	 * href="http://developer.android.com/tools/help/zipalign.html">zipalign
+	 * </a>.
+	 * </p>
+	 */
+	public static final int DEFAULT_ALIGNMENT = 4;
+
+	/**
+	 * Used to append to newly aligned APK's file name.
+	 */
+	public static final String ALIGNED = "ALIGNED";
+
+	/**
+	 * Private helper class.
+	 *
+	 * @author Hai Bison
+	 * @since v1.6.9 beta
+	 */
+	private static class XEntry {
+
+		public final ZipEntry entry;
+		public final long headerOffset;
+		public final int flags;
+		public final int padding;
+
+		/**
+		 * Creates new instance.
+		 *
+		 * @param entry        the entry.
+		 * @param headerOffset the offset of the header.
+		 * @param flags        the flags.
+		 * @param padding      the padding of the "extra" field.
+		 */
+		public XEntry(ZipEntry entry, long headerOffset, int flags, int padding) {
+			this.entry = entry;
+			this.headerOffset = headerOffset;
+			this.flags = flags;
+			this.padding = padding;
+		}// XEntry()
+	}// XEntry
+
+	/**
+	 * Extended class of {@link FilterOutputStream}, which has some helper
+	 * methods for writing data to ZIP stream.
+	 *
+	 * @author Hai Bison
+	 * @since v1.6.9 beta
+	 */
+	private static class FilterOutputStreamEx extends FilterOutputStream {
+
+		private long totalWritten = 0;
+
+		/**
+		 * Creates new instance.
+		 *
+		 * @param out {@link OutputStream}.
+		 */
+		public FilterOutputStreamEx(OutputStream out) {
+			super(out);
+		}// FilterOutputStreamEx()
+
+		@Override
+		public void write(byte[] b) throws IOException {
+			out.write(b);
+			totalWritten += b.length;
+		}// write()
+
+		@Override
+		public void write(byte[] b, int off, int len) throws IOException {
+			out.write(b, off, len);
+			totalWritten += len;
+		}// write()
+
+		@Override
+		public void write(int b) throws IOException {
+			out.write(b);
+			totalWritten += 1;
+		}// write()
+
+		@Override
+		public void close() throws IOException {
+			// l("\t\tclose() >> totalWritten = %,d", totalWritten);
+			super.close();
+		}// close()
+
+		/**
+		 * Writes a 32-bit int to the output stream in little-endian byte order.
+		 *
+		 * @param v the data to write.
+		 * @throws IOException
+		 */
+		public void writeInt(long v) throws IOException {
+			write((int) ((v >>> 0) & 0xff));
+			write((int) ((v >>> 8) & 0xff));
+			write((int) ((v >>> 16) & 0xff));
+			write((int) ((v >>> 24) & 0xff));
+		}// writeInt()
+
+		/**
+		 * Writes a 16-bit short to the output stream in little-endian byte
+		 * order.
+		 *
+		 * @param v the data to write.
+		 * @throws IOException
+		 */
+		public void writeShort(int v) throws IOException {
+			write((v >>> 0) & 0xff);
+			write((v >>> 8) & 0xff);
+		}// writeShort()
+
+	}// FilterOutputStreamEx
+
+	/**
+	 * To align ZIP files :-)
+	 *
+	 * @author Hai Bison
+	 * @since v1.6.9 beta
+	 */
+	public static class ZipAligner {
+		private final File mInputFile;
+		private final int mAlignment;
+		private final File mOutputFile;
+		private final List<XEntry> mXEntries = new ArrayList<XEntry>();
+
+		private ZipFile mZipFile;
+		private RandomAccessFile mRafInput;
+		private FilterOutputStreamEx mOutputStream;
+		private long mInputFileOffset = 0;
+		private int mTotalPadding = 0;
+
+		/**
+		 * Creates new instance with alignment value of
+		 * {@link ZipAlign#DEFAULT_ALIGNMENT}.
+		 *
+		 * @param input  the input file.
+		 * @param output the output file.
+		 */
+		public ZipAligner(File input, File output) {
+			this(input, DEFAULT_ALIGNMENT, output);
+		}
+
+		/**
+		 * Creates new instance.
+		 *
+		 * @param input     the input file.
+		 * @param alignment the alignment, {@link ZipAlign#DEFAULT_ALIGNMENT} is
+		 *                  highly recommended.
+		 * @param output    the output file.
+		 */
+		public ZipAligner(File input, int alignment, File output) {
+			mInputFile = input;
+			mAlignment = alignment;
+			mOutputFile = output;
+		}
+
+		public void run() {
+			try {
+				mZipFile = new ZipFile(mInputFile);
+				mRafInput = new RandomAccessFile(mInputFile, "r");
+				mOutputStream = new FilterOutputStreamEx(new BufferedOutputStream(
+					new FileOutputStream(mOutputFile),
+					Files.FILE_BUFFER
+				));
+				copyAllEntries();
+				buildCentralDirectory();
+			} catch (Exception exception) {
+				throw new RuntimeException(exception);
+			} finally {
+				IOUtils.closeQuietly(mZipFile);
+				IOUtils.closeQuietly(mRafInput);
+				IOUtils.closeQuietly(mOutputStream);
+			}
+		}
+
+		/**
+		 * Copies all entries, aligning them if needed.
+		 * <p>
+		 * This takes 80% of total.
+		 * </p>
+		 *
+		 * @throws IOException
+		 */
+		private void copyAllEntries() throws IOException {
+			final int entryCount = mZipFile.size();
+			if (entryCount == 0) {
+//				sendNotification(MSG_INFO, mProgress += 80);
+				return;
+			}
+
+			final float progress = 80f / entryCount;
+
+			final Enumeration<? extends ZipEntry> entries = mZipFile.entries();
+			while (entries.hasMoreElements()) {
+				final ZipEntry entry = entries.nextElement();
+
+				int flags = entry.getMethod() == ZipEntry.STORED ? 0 : 1 << 3;
+				flags |= 1 << 11;
+
+				final long outputEntryHeaderOffset = mOutputStream.totalWritten;
+//				if (Sys.DEBUG)
+//					L.d("\t\toutputEntryHeaderOffset = %,d",
+//						outputEntryHeaderOffset);
+
+				final int inputEntryHeaderSize = ZIP_ENTRY_HEADER_LEN
+					+ (entry.getExtra() != null ? entry.getExtra().length
+					: 0)
+					+ entry.getName().getBytes(Texts.UTF8).length;
+				final long inputEntryDataOffset = mInputFileOffset
+					+ inputEntryHeaderSize;
+
+//				sendNotification(
+//					MSG_INFO,
+//					Texts.NULL,
+//					String.format("%,15d  %s", inputEntryDataOffset,
+//						entry.getName()));
+
+				final int padding;
+
+				if (entry.getMethod() != ZipEntry.STORED) {
+					/*
+					 * The entry is compressed, copy it without padding.
+					 */
+					padding = 0;
+				} else {
+					/*
+					 * Copy the entry, adjusting as required. We assume that the
+					 * file position in the new file will be equal to the file
+					 * position in the original.
+					 */
+					long newOffset = inputEntryDataOffset + mTotalPadding;
+//					if (Sys.DEBUG)
+//						L.d("\t\t\tnewOffset = %,d", newOffset);
+					padding = (int) ((mAlignment - (newOffset % mAlignment)) % mAlignment);
+					mTotalPadding += padding;
+				}
+
+				final XEntry xentry = new XEntry(entry,
+					outputEntryHeaderOffset, flags, padding);
+				mXEntries.add(xentry);
+
+//				if (Sys.DEBUG)
+//					L.d("\t'%s' >> header = %,d, padding = %,d",
+//						entry.getName(), inputEntryHeaderSize, padding);
+
+				/*
+				 * Modify the original header, add padding to `extra` field and
+				 * copy it to output.
+				 */
+				byte[] extra = entry.getExtra();
+				if (extra == null) {
+					extra = new byte[padding];
+					Arrays.fill(extra, (byte) 0);
+				} else {
+					byte[] newExtra = new byte[extra.length + padding];
+					System.arraycopy(extra, 0, newExtra, 0, extra.length);
+					Arrays.fill(newExtra, extra.length, newExtra.length,
+						(byte) 0);
+					extra = newExtra;
+				}
+				entry.setExtra(extra);
+
+				/*
+				 * Now write the header to output.
+				 */
+
+				mOutputStream.writeInt(ZipOutputStream.LOCSIG);
+				mOutputStream.writeShort(ZIP_ENTRY_VERSION);
+				mOutputStream.writeShort(flags);
+				mOutputStream.writeShort(entry.getMethod());
+
+				int modDate;
+				int time;
+				GregorianCalendar cal = new GregorianCalendar();
+				cal.setTime(new Date(entry.getTime()));
+				int year = cal.get(Calendar.YEAR);
+				if (year < 1980) {
+					modDate = 0x21;
+					time = 0;
+				} else {
+					modDate = cal.get(Calendar.DATE);
+					modDate = (cal.get(Calendar.MONTH) + 1 << 5) | modDate;
+					modDate = ((cal.get(Calendar.YEAR) - 1980) << 9) | modDate;
+					time = cal.get(Calendar.SECOND) >> 1;
+					time = (cal.get(Calendar.MINUTE) << 5) | time;
+					time = (cal.get(Calendar.HOUR_OF_DAY) << 11) | time;
+				}
+
+				mOutputStream.writeShort(time);
+				mOutputStream.writeShort(modDate);
+
+				mOutputStream.writeInt(entry.getCrc());
+				mOutputStream.writeInt(entry.getCompressedSize());
+				mOutputStream.writeInt(entry.getSize());
+
+				mOutputStream
+					.writeShort(entry.getName().getBytes(Texts.UTF8).length);
+				mOutputStream.writeShort(entry.getExtra().length);
+				mOutputStream.write(entry.getName().getBytes(Texts.UTF8));
+				mOutputStream.write(entry.getExtra(), 0,
+					entry.getExtra().length);
+
+				/*
+				 * Copy raw data.
+				 */
+
+				mInputFileOffset += inputEntryHeaderSize;
+
+				final long sizeToCopy;
+				if ((flags & ZIP_ENTRY_USES_DATA_DESCR) != 0)
+					sizeToCopy = (entry.isDirectory() ? 0 : entry
+						.getCompressedSize())
+						+ ZIP_ENTRY_DATA_DESCRIPTOR_LEN;
+				else
+					sizeToCopy = entry.isDirectory() ? 0 : entry
+						.getCompressedSize();
+
+				if (sizeToCopy > 0) {
+					mRafInput.seek(mInputFileOffset);
+
+					long totalSizeCopied = 0;
+					final byte[] buf = new byte[Files.FILE_BUFFER];
+					while (totalSizeCopied < sizeToCopy) {
+						int read = mRafInput.read(
+							buf,
+							0,
+							(int) Math.min(Files.FILE_BUFFER, sizeToCopy
+								- totalSizeCopied));
+						if (read <= 0)
+							break;
+
+						mOutputStream.write(buf, 0, read);
+						totalSizeCopied += read;
+					}// while
+				}// if
+
+				mInputFileOffset += sizeToCopy;
+
+//				if (padding == 0)
+//					sendNotification(MSG_INFO, mProgress += progress,
+//						Texts.NULL, String.format("  (%s, %s)\n",
+//							Messages.getString(R.string.compressed),
+//							Messages.getString(R.string.passed)));
+//				else
+//					sendNotification(
+//						MSG_INFO,
+//						mProgress += progress,
+//						Texts.NULL,
+//						String.format("  (%s, %s)\n",
+//							Messages.getString(R.string.aligned),
+//							Texts.sizeToStr(padding)));
+			}// while
+		}// copyAllEntries()
+
+		/**
+		 * Builds central directory.
+		 * <p>
+		 * This takes 10% of total.
+		 * </p>
+		 *
+		 * @throws IOException
+		 */
+		private void buildCentralDirectory() throws IOException {
+			final long centralDirOffset = mOutputStream.totalWritten;
+
+//			L.d("\tWriting Central Directory at %,d", centralDirOffset);
+
+			for (XEntry xentry : mXEntries) {
+				/*
+				 * Write entry.
+				 */
+				final ZipEntry entry = xentry.entry;
+
+				int modDate;
+				int time;
+				GregorianCalendar cal = new GregorianCalendar();
+				cal.setTime(new Date(entry.getTime()));
+				int year = cal.get(Calendar.YEAR);
+				if (year < 1980) {
+					modDate = 0x21;
+					time = 0;
+				} else {
+					modDate = cal.get(Calendar.DATE);
+					modDate = (cal.get(Calendar.MONTH) + 1 << 5) | modDate;
+					modDate = ((cal.get(Calendar.YEAR) - 1980) << 9) | modDate;
+					time = cal.get(Calendar.SECOND) >> 1;
+					time = (cal.get(Calendar.MINUTE) << 5) | time;
+					time = (cal.get(Calendar.HOUR_OF_DAY) << 11) | time;
+				}
+
+				mOutputStream.writeInt(ZipFile.CENSIG); // CEN header signature
+				mOutputStream.writeShort(ZIP_ENTRY_VERSION); // version made by
+				mOutputStream.writeShort(ZIP_ENTRY_VERSION); // version needed
+				// to
+				// extract
+				mOutputStream.writeShort(xentry.flags); // general purpose bit
+				// flag
+				mOutputStream.writeShort(entry.getMethod()); // compression
+				// method
+				mOutputStream.writeShort(time);
+				mOutputStream.writeShort(modDate);
+				mOutputStream.writeInt(entry.getCrc()); // crc-32
+				mOutputStream.writeInt(entry.getCompressedSize()); // compressed
+				// size
+				mOutputStream.writeInt(entry.getSize()); // uncompressed size
+				final byte[] nameBytes = entry.getName().getBytes(Texts.UTF8);
+				mOutputStream.writeShort(nameBytes.length);
+				mOutputStream.writeShort(entry.getExtra() != null ? entry
+					.getExtra().length - xentry.padding : 0);
+				final byte[] commentBytes;
+				if (entry.getComment() != null) {
+					commentBytes = entry.getComment().getBytes(Texts.UTF8);
+					mOutputStream.writeShort(Math.min(commentBytes.length,
+						0xffff));
+				} else {
+					commentBytes = null;
+					mOutputStream.writeShort(0);
+				}
+				mOutputStream.writeShort(0); // starting disk number
+				mOutputStream.writeShort(0); // internal file attributes
+				// (unused)
+				mOutputStream.writeInt(0); // external file attributes (unused)
+				mOutputStream.writeInt(xentry.headerOffset); // relative offset
+				// of
+				// local
+				// header
+				mOutputStream.write(nameBytes);
+				if (entry.getExtra() != null)
+					mOutputStream.write(entry.getExtra(), 0,
+						entry.getExtra().length - xentry.padding);
+				if (commentBytes != null)
+					mOutputStream.write(commentBytes, 0,
+						Math.min(commentBytes.length, 0xffff));
+			}// for xentry
+
+
+//			sendNotification(MSG_INFO, mProgress += 5);
+
+			/*
+			 * Write the end of central directory.
+			 */
+			final long centralDirSize = mOutputStream.totalWritten
+				- centralDirOffset;
+//			L.d("\tWriting End of Central Directory, its size = %,d",
+//				centralDirSize);
+
+			final int entryCount = mXEntries.size();
+
+			mOutputStream.writeInt(ZipFile.ENDSIG); // END record signature
+			mOutputStream.writeShort(0); // number of this disk
+			mOutputStream.writeShort(0); // central directory start disk
+			mOutputStream.writeShort(entryCount); // number of directory entries
+			// on
+			// disk
+			mOutputStream.writeShort(entryCount); // total number of directory
+			// entries
+			mOutputStream.writeInt(centralDirSize); // length of central
+			// directory
+			mOutputStream.writeInt(centralDirOffset); // offset of central
+			// directory
+			if (mZipFile.getComment() != null) { // zip file comment
+				final byte[] bytes = mZipFile.getComment().getBytes(Texts.UTF8);
+				mOutputStream.writeShort(bytes.length);
+				mOutputStream.write(bytes);
+			} else {
+				mOutputStream.writeShort(0);
+			}
+
+			mOutputStream.flush();
+
+//			sendNotification(MSG_INFO, mProgress += 5);
+		}
+	}
+
+	/**
+	 * The ZIP alignment verifier.
+	 *
+	 * @author Hai Bison
+	 * @since v1.6.9 beta
+	 */
+	public static class ZipAlignmentVerifier {
+
+		private final File mInputFile;
+		private final int mAlignment;
+		private ZipFile mZipFile;
+		private RandomAccessFile mRafInput;
+
+		/**
+		 * 0 >> 100
+		 */
+		private double mProgress = 0;
+		private boolean mFoundBad = false;
+
+		/**
+		 * Creates new instance with alignment value of
+		 * {@link ZipAlign#DEFAULT_ALIGNMENT}.
+		 *
+		 * @param inputFile the input file to verify.
+		 */
+		public ZipAlignmentVerifier(File inputFile) {
+			this(inputFile, DEFAULT_ALIGNMENT);
+		}// ZipAlignmentVerifier()
+
+		/**
+		 * Creates new instance.
+		 *
+		 * @param inputFile the input file.
+		 * @param alignment the alignment, {@link ZipAlign#DEFAULT_ALIGNMENT} is
+		 *                  highly recommended.
+		 */
+		public ZipAlignmentVerifier(File inputFile, int alignment) {
+			mInputFile = inputFile;
+			mAlignment = alignment;
+		}// ZipAlignmentVerifier()
+
+		public void run() {
+//			L.d("%s >> starting", ZipAlignmentVerifier.class.getSimpleName());
+
+			try {
+				openFiles();
+				verify();
+			} catch (Exception e) {
+				mFoundBad = true;
+//				sendNotification(
+//					MSG_ERROR,
+//					Texts.NULL,
+//					Messages.getString(R.string.pmsg_error_details,
+//						e.getMessage(), L.printStackTrace(e)));
+			} finally {
+				try {
+					closeFiles();
+				} catch (Exception e) {
+					mFoundBad = true;
+//					sendNotification(
+//						MSG_ERROR,
+//						Texts.NULL,
+//						Messages.getString(R.string.pmsg_error_details,
+//							e.getMessage(), L.printStackTrace(e)));
+				}
+			}
+
+//				sendNotification(MSG_ERROR, Texts.NULL,
+//					Messages.getString(R.string.cancelled));
+//
+//			sendNotification(MSG_DONE);
+//
+//			L.d("%s >> finishing", ZipAlignmentVerifier.class.getSimpleName());
+		}// run()
+
+		/**
+		 * Opens files.
+		 * <p>
+		 * This takes 5% of total.
+		 * </p>
+		 *
+		 * @throws IOException
+		 */
+		private void openFiles() throws IOException {
+//			sendNotification(MSG_INFO, Texts.NULL, String.format("%s\n\n",
+//				Messages.getString(
+//					R.string.pmsg_verifying_alignment_of_apk,
+//					mInputFile.getName(), mAlignment)));
+
+			mZipFile = new ZipFile(mInputFile);
+			mRafInput = new RandomAccessFile(mInputFile, "r");
+
+//			sendNotification(MSG_INFO, mProgress = 5);
+		}// openFiles()
+
+		/**
+		 * Verifies input file.
+		 * <p>
+		 * This takes 90% of total.
+		 * </p>
+		 *
+		 * @throws IOException
+		 */
+		private void verify() throws IOException {
+			final int entryCount = mZipFile.size();
+			if (entryCount == 0) {
+//				sendNotification(MSG_INFO, mProgress += 90);
+				return;
+			}
+
+			final Enumeration<? extends ZipEntry> entries = mZipFile.entries();
+			final float progress = 90f / entryCount;
+			long dataOffset = 0;
+
+			while (entries.hasMoreElements()) {
+				final ZipEntry entry = entries.nextElement();
+
+				mRafInput.seek(dataOffset + ZIP_ENTRY_OFFSET_EXTRA_LEN);
+				final byte[] buf = new byte[ZIP_ENTRY_FIELD_EXTRA_LEN_SIZE];
+				if (mRafInput.read(buf) != buf.length) {
+					mFoundBad = true;
+					throw new IOException("Reading extra field length failed");
+				}
+				/*
+				 * Fetches unsigned 16-bit value from byte array at specified
+				 * offset. The bytes are assumed to be in Intel (little-endian)
+				 * byte order.
+				 */
+				final int extraLen = (buf[0] & 0xff) | ((buf[1] & 0xff) << 8);
+
+				final int headerSize = ZIP_ENTRY_HEADER_LEN + extraLen
+					+ entry.getName().getBytes(Texts.UTF8).length;
+
+				if (entry.getMethod() != ZipEntry.STORED) {
+					/*
+					 * The entry is compressed.
+					 */
+//					sendNotification(
+//						MSG_INFO,
+//						mProgress += progress,
+//						Texts.NULL,
+//						String.format("%,15d  %s  (%s - %s)\n", dataOffset
+//								+ headerSize, entry.getName(),
+//							Messages.getString(R.string.ok),
+//							Messages.getString(R.string.compressed)));
+				} else {
+					/*
+					 * The entry is not compressed.
+					 */
+					if ((dataOffset + headerSize) % mAlignment != 0) {
+//						sendNotification(
+//							MSG_INFO,
+//							mProgress += progress,
+//							Texts.NULL,
+//							String.format(
+//								"%,15d  %s  (%s - %s)\n",
+//								dataOffset + headerSize,
+//								entry.getName(),
+//								Messages.getString(R.string.BAD),
+//								Texts.sizeToStr((dataOffset + headerSize)
+//									% mAlignment)));
+						mFoundBad = true;
+					} else {
+//						sendNotification(
+//							MSG_INFO,
+//							mProgress += progress,
+//							Texts.NULL,
+//							String.format("%,15d  %s  (%s)\n", dataOffset
+//									+ headerSize, entry.getName(),
+//								Messages.getString(R.string.ok)));
+					}
+				}
+
+				int flags = entry.getMethod() == ZipEntry.STORED ? 0 : 1 << 3;
+				flags |= 1 << 11;
+				final long dataSize;
+				if ((flags & ZIP_ENTRY_USES_DATA_DESCR) != 0)
+					dataSize = (entry.isDirectory() ? 0 : entry
+						.getCompressedSize())
+						+ ZIP_ENTRY_DATA_DESCRIPTOR_LEN;
+				else
+					dataSize = entry.isDirectory() ? 0 : entry
+						.getCompressedSize();
+
+//				if (Sys.DEBUG)
+//					L.d("size = %,8d, compressed = %,8d, crc32 = %08x, data mHeaderOffset = %,8d >> %,8d"
+//							+ " >> Entry '%s'", entry.getSize(),
+//						entry.getCompressedSize(), entry.getCrc(),
+//						dataOffset, dataOffset + headerSize,
+//						entry.getName());
+
+				dataOffset += headerSize + dataSize;
+			}// while
+		}// verify()
+
+		/**
+		 * Closes source files.
+		 * <p>
+		 * This takes 5% of total.
+		 * </p>
+		 *
+		 * @throws IOException
+		 */
+		private void closeFiles() throws IOException {
+			mZipFile.close();
+			mRafInput.close();
+
+//			sendNotification(
+//				MSG_INFO,
+//				mProgress = 100,
+//				Texts.NULL,
+//				String.format(
+//					"\n%s",
+//					mFoundBad ? Messages
+//						.getString(R.string.verification_failed)
+//						: Messages
+//						.getString(R.string.verification_succesful)));
+		}// closeFiles()
+
+	}
+
+	static class Texts {
+		public static final String UTF8 = "UTF-8";
+	}
+
+	static class Files {
+		/**
+		 * File handling buffer (reading, writing...). {@code 32 KiB}.
+		 */
+		public static final int FILE_BUFFER = 32 * 1024;
+	}
+}
diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..2b14f31
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+rm ZipAlign.jar *.class *.apk
+[[ ! -f "commons-io-2.8.0.jar" ]] && wget "https://repo1.maven.org/maven2/commons-io/commons-io/2.8.0/commons-io-2.8.0.jar"
+javac *.java -cp commons-io-2.8.0.jar
+unzip -ou commons-io-2.8.0.jar
+rm -R META-INF
+jar cfe ZipAlign.jar Launcher org *.class