Android Unzip from Assets folder

[Ron Ingram]

I'm trying to unzip 3 files in three different folders found in the assets folder to my external file directory (ctx.getExternalFiles). Using Log.v(output of the file being zipped), it appears to be copying and unzipping correctly. However, when I check the folders that are correctly created, no data exists. I've set permissions in my manafest correctly as well. Does anyone know what could e causing this?

  

public void copyAssetsToExtStorage() throws IOException {

    // get list from assests folder
    // iterate and get all zip files and send to unzip
    String[] assets = new String[3];
    assets[0] = "nlpmodels" + File.separator + "nlpmodels.zip";
    assets[1] = "stopwords" + File.separator + "stop-words_english_6_en.zip";
    assets[2] = "wordnet" + File.separator + "wordnet.zip";
    for (String s : assets) {

        Log.v("AssetsHandler", s);
        unZip(s);

    }

}

   

public void unZip(String fileName) {

    AssetManager manager = ctx.getAssets();

    final String OUTPUT_FOLDER = ctx.getExternalFilesDir(null).getAbsolutePath();
    // create output directory if not exists
    String[] fileNameSplit = fileName.split("/");

    File folder = new File(OUTPUT_FOLDER + "/" + fileNameSplit[0]);
    if (!folder.exists()) {
        folder.mkdir();
    }

    Log.v("AssetsHandler.unZip", "Destination output: " + OUTPUT_FOLDER);

    try {

        // get the zip file content
        Log.v("AssetsHandler retrieval nam", fileName);

        BufferedInputStream bis = new BufferedInputStream(manager.open(fileName));
        ZipInputStream zis = new ZipInputStream(bis);
        // get the zipped file list entry
        ZipEntry ze = zis.getNextEntry();

        while (ze != null) {

            String fileEntry = ze.getName();
            File newFile = new File(OUTPUT_FOLDER + File.separator + fileEntry);
            Log.v("AssetsHandler.unZip", "File unzip: " + newFile.getAbsolutePath());

            // create all non existent folders from zip archive
            if (fileEntry.endsWith("/")) {
                // new File(newFile.getParent()).mkdirs();
                newFile.mkdirs();
            }

            File parent = newFile.getParentFile();
            if (parent != null) {
                parent.mkdirs();
            }

            // FileOutputStream fos = new FileOutputStream(newFile);

            FileOutputStream fos = ctx.openFileOutput(newFile.getName(),
                    0);

            byte[] buffer = new byte[4096];
            int length = 0;
            while ((length = zis.read(buffer)) > 0) {

                fos.write(buffer, 0, length);
                fos.flush();
            }

            fos.close();
            ze = zis.getNextEntry();

        }
        // close open resources
        bis.close();
        zis.closeEntry();
        zis.close();

    } catch (IOException ex) {
        Log.v("AssetsHandler.unZip EX", ex.toString());
    }
}