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POAndroid unzipping files that where zipped on a Mac
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  1. POAndroid unzipping files that where zipped on a Mac
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    copied!<p>I have an application, which downloads a zip and unzips the files on my SDCard. All works fine, but when my collegue creates the zip file on his Mac (lion), all my files have </p> <p><strong>size:-1</strong> </p> <p><strong>crc:-1</strong> </p> <p><strong>compressedsize:-1</strong></p> <p>and I cannot write the files to my sdcard. Both zips have exactly the same content, the only difference is where they where originally zipped. This is the code where I unzip the files:</p> <pre><code>public class UnzipTask extends AsyncTask&lt;String, Integer, Void&gt; { private static final String TAG = UnzipTask.class.getSimpleName(); private String mDestLocation; private ZipListener mListener; private Context mCtx; private int mCallbackId; public UnzipTask(Context context, ZipListener listener, File dir) { mCtx = context; mListener = listener; mDestLocation = dir.getAbsolutePath() + "/"; } public void setId(int id) { mCallbackId = id; } @Override protected Void doInBackground(String... arg0) { try { String file = arg0[0]; InputStream is = mCtx.getAssets().open(file); unzipFile(is); } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } return null; } /** * Private function that ensures a directory exist * @param dir */ private void _dirChecker(String dir) { File f = new File(mDestLocation + dir); if (!f.isDirectory()) { f.mkdirs(); } } private void unzipFile(InputStream input) throws Exception { ZipInputStream zin = new ZipInputStream(input); ZipEntry ze = null; while ((ze = zin.getNextEntry()) != null) { Log.v(TAG, "Unzipping " + ze.getName()); if(mListener != null) { mListener.onUnzipped(mCallbackId, ze.getName(), ze.g etSize(), ze.getCrc(), ze.getCompressedSize()); } if (ze.isDirectory()) { _dirChecker(ze.getName()); } else if (ze.getCompressedSize() &gt; 0 &amp;&amp; ze.getSize() &gt; 0 &amp;&amp; ze.getCrc() != 0.0) { // If size=-1 -&gt; writing to disk fails String fileOutput = mDestLocation + ze.getName(); FileOutputStream fout = new FileOutputStream(fileOutput); int read = 0; byte[] buffer = new byte[(int) ze.getSize()]; while ((read = zin.read(buffer)) &gt;= 0) { fout.write(buffer, 0, read); } zin.closeEntry(); fout.close(); } else { Log.v(TAG, "Skipping entry" + ze.getName()); } } } zin.close(); } } </code></pre> <p><strong>A couple of notes</strong></p> <p><strong>1)</strong> I can unzip both files on my windows 7 pc</p> <p><strong>2)</strong> My collegue can unzip both files on his Mac</p> <p><strong>3)</strong> The only problem is, on Android I cannot unzip the zip file the MAC creates...</p> <p><strong>QUESTION:</strong></p> <p>Does anyone know why the zip file that was zipped on a Mac has these invalid sizes? Is my Unzipping process (on Android) missing some code?</p> <p>You can download the zips here if you want, as well as a very small apk to show the output:</p> <p>EDIT: updated the links</p> <p><a href="http://www.haarmodemanowi.nl/stackoverflow/test_mac.zip" rel="nofollow">Zip file (zipped on a Mac)</a></p> <p><a href="http://www.haarmodemanowi.nl/stackoverflow/test_win.zip" rel="nofollow">Zip file (zippen on Win7)</a></p> <p><a href="http://www.haarmodemanowi.nl/stackoverflow/Stackoverflow.apk" rel="nofollow">Demo.apk</a></p>
 

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