gistfile1.java

	public void extractZipFiles(String dest, String zipName) {
		try {
			AssetManager assetManager = context.getAssets();			
			InputStream inputStream = assetManager.open(zipName, AssetManager.ACCESS_STREAMING);

			ZipInputStream zipInputStream = new ZipInputStream(inputStream);
			ZipEntry zipEntry = zipInputStream.getNextEntry();
			
			while (zipEntry != null) { 
				String entryName = zipEntry.getName();
				int n;
				FileOutputStream fileOutputStream;
				fileOutputStream = new FileOutputStream(dest + "/" + entryName);             

				byte[] buf = new byte[DEFAULT_BUFFER_SIZE];
				while ((n = zipInputStream.read(buf, 0, DEFAULT_BUFFER_SIZE)) > -1) {
					fileOutputStream.write(buf, 0, n);
				}

				fileOutputStream.close(); 
				zipInputStream.closeEntry();
				zipEntry = zipInputStream.getNextEntry();

			}
			zipInputStream.close();
		} catch (Exception e) {
			Log.e(TAG, e.getMessage());
		}
	}