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• Here I am going to show some an examples on how to use "pixymeta-android" library: Note: the examples will not work out of the box with Android application. They just demonstrate how the library can be used generally.

    public class TestPixyMetaAndroid {
    	// Obtain a logger instance
    	private static final Logger LOGGER = LoggerFactory.getLogger(TestPixyMetaAndroid.class);
    	
    	public static void main(String[] args) throws IOException {
    		Map<MetadataType, Metadata> metadataMap = Metadata.readMetadata(args[0]);
    		LOGGER.info("Start of metadata information:");
    		LOGGER.info("Total number of metadata entries: {}", metadataMap.size());
    		
    		int i = 0;
    		for(Map.Entry<MetadataType, Metadata> entry : metadataMap.entrySet()) {
    			LOGGER.info("Metadata entry {} - {}", i, entry.getKey());
    			entry.getValue().showMetadata();
    			i++;
    			LOGGER.info("-----------------------------------------");
    		}
    		LOGGER.info("End of metadata information.");
  
    		FileInputStream fin = null;
    		FileOutputStream fout = null;
    		
    		if(metadataMap.get(MetadataType.XMP) != null) {
    			XMP xmp = (XMP)metadataMap.get(MetadataType.XMP);
    			Document xmpDoc = xmp.getXmpDocument();
    			fin = new FileInputStream("images/1.jpg");
    			fout = new FileOutputStream("1-xmp-inserted.jpg");
    			if(!xmp.hasExtendedXmp())
    				Metadata.insertXMP(fin, fout, XMLUtils.serializeToString(xmpDoc.getDocumentElement(), "UTF-8"));
    			else {
    				Document extendedXmpDoc = xmp.getExtendedXmpDocument();
    				JPEGMeta.insertXMP(fin, fout, XMLUtils.serializeToString(xmpDoc.getDocumentElement(), "UTF-8"), XMLUtils.serializeToString(extendedXmpDoc));
    			}
    			fin.close();
    			fout.close();
    		}
    		
    		Metadata.extractThumbnails("images/iptc-envelope.tif", "iptc-envelope");
    	
    		fin = new FileInputStream("images/iptc-envelope.tif");
    		fout = new FileOutputStream("iptc-envelope-iptc-inserted.tif");
    			
    		Metadata.insertIPTC(fin, fout, createIPTCDataSet(), true);
    		
    		fin.close();
    		fout.close();
    		
    		fin = new FileInputStream("images/wizard.jpg");
    		fout = new FileOutputStream("wizard-iptc-inserted.jpg");
    		
    		Metadata.insertIPTC(fin, fout, createIPTCDataSet(), true);
    		
    		fin.close();
    		fout.close();
    		
    		fin = new FileInputStream("images/1.jpg");
    		fout = new FileOutputStream("1-irbthumbnail-inserted.jpg");
    		
    		Metadata.insertIRBThumbnail(fin, fout, createThumbnail("images/1.jpg"));
    		
    		fin.close();
    		fout.close();
    		
    		fin = new FileInputStream("images/f1.tif");
    		fout = new FileOutputStream("f1-irbthumbnail-inserted.tif");
    		
    		Metadata.insertIRBThumbnail(fin, fout, createThumbnail("images/f1.tif"));
    		
    		fin.close();
    		fout.close();		
  
    		fin = new FileInputStream("images/exif.tif");
    		fout = new FileOutputStream("exif-exif-inserted.tif");
    		
    		Metadata.insertExif(fin, fout, populateExif(TiffExif.class), true);
    		
    		fin.close();
    		fout.close();
    		
    		fin = new FileInputStream("images/12.jpg");
    		fout = new FileOutputStream("12-exif-inserted.jpg");
  
    		Metadata.insertExif(fin, fout, populateExif(JpegExif.class), true);
    		
    		fin.close();
    		fout.close();
    		
    		fin = new FileInputStream("images/table.jpg");
    		fout = new FileOutputStream("table-metadata-removed.jpg");
    		
    		Metadata.removeMetadata(fin, fout, MetadataType.IPTC, MetadataType.PHOTOSHOP, MetadataType.ICC_PROFILE, MetadataType.XMP, MetadataType.EXIF);
    		
    		fin.close();
    		fout.close();
    		
    		fin = new FileInputStream("images/12.jpg");
    		fout = new FileOutputStream("12-photoshop-iptc-inserted.jpg");
    		
    		Metadata.insertIRB(fin, fout, createPhotoshopIPTC(), true);
    		
    		fin.close();
    		fout.close();
    		
    		fin = new FileInputStream("images/table.jpg");
    		JPEGMeta.extractDepthMap(fin, "table");
    		
    		fin.close();
    	}
    	
    	private static List<IPTCDataSet> createIPTCDataSet() {
    		List<IPTCDataSet> iptcs = new ArrayList<IPTCDataSet>();
    		iptcs.add(new IPTCDataSet(IPTCRecord.APPLICATION, IPTCApplicationTag.COPYRIGHT_NOTICE.getTag(), "Copyright 2014-2015, yuwen_66@yahoo.com"));
    		iptcs.add(new IPTCDataSet(IPTCApplicationTag.CATEGORY.getTag(), "ICAFE"));
    		iptcs.add(new IPTCDataSet(IPTCApplicationTag.KEY_WORDS.getTag(), "Welcome 'icafe' user!"));
    		
    		return iptcs;
    	}
    	
    	private static List<_8BIM> createPhotoshopIPTC() {
    		IPTC_NAA iptc = new IPTC_NAA();
    		iptc.addDataSet(new IPTCDataSet(IPTCRecord.APPLICATION, IPTCApplicationTag.COPYRIGHT_NOTICE.getTag(), "Copyright 2014-2015, yuwen_66@yahoo.com"));
    		iptc.addDataSet(new IPTCDataSet(IPTCApplicationTag.KEY_WORDS.getTag(), "Welcome 'icafe' user!"));
    		iptc.addDataSet(new IPTCDataSet(IPTCApplicationTag.CATEGORY.getTag(), "ICAFE"));
    		
    		return new ArrayList<_8BIM>(Arrays.asList(iptc));
    	}
    	
    	private static Bitmap createThumbnail(String filePath) throws IOException {
    		FileInputStream fin = null;
    		try {
    			fin = new FileInputStream(filePath);
    		} catch (FileNotFoundException e) {
    			e.printStackTrace();
    		}
    		
    		Bitmap thumbnail = MetadataUtils.createThumbnail(fin);
    		
    		fin.close();
    		
    		return thumbnail;
    	}
    	
    	// This method is for testing only
    	private static Exif populateExif(Class<?> exifClass) throws IOException {
    		// Create an EXIF wrapper
    		Exif exif = exifClass == (TiffExif.class)?new TiffExif() : new JpegExif();
    		exif.addImageField(TiffTag.WINDOWS_XP_AUTHOR, FieldType.WINDOWSXP, "Author");
    		exif.addImageField(TiffTag.WINDOWS_XP_KEYWORDS, FieldType.WINDOWSXP, "Copyright;Author");
    		DateFormat formatter = new SimpleDateFormat("yyyy:MM:dd HH:mm:ss");
    		exif.addExifField(ExifTag.EXPOSURE_TIME, FieldType.RATIONAL, new int[] {10, 600});
    		exif.addExifField(ExifTag.FNUMBER, FieldType.RATIONAL, new int[] {49, 10});
    		exif.addExifField(ExifTag.ISO_SPEED_RATINGS, FieldType.SHORT, new short[]{273});
    		//All four bytes should be interpreted as ASCII values - represents [0220] - new byte[]{48, 50, 50, 48}
    		exif.addExifField(ExifTag.EXIF_VERSION, FieldType.UNDEFINED, "0220".getBytes());
    		exif.addExifField(ExifTag.DATE_TIME_ORIGINAL, FieldType.ASCII, formatter.format(new Date()));
    		exif.addExifField(ExifTag.DATE_TIME_DIGITIZED, FieldType.ASCII, formatter.format(new Date()));
    		exif.addExifField(ExifTag.FOCAL_LENGTH, FieldType.RATIONAL, new int[] {240, 10});		
    		// Insert ThumbNailIFD
    		// Since we don't provide thumbnail image, it will be created later from the input stream
    		exif.setThumbnailRequired(true);
    		
    		return exif;
    	}
    }