Export database file

database.java

public Uri exportDatabase() {
		String dbName = DATABASE_NAME;
		File dbFile = new File(DATABASE_NAME);
		
		File desti = new File(Environment.getExternalStorageDirectory(),
				"backup/");
		File file = new File(desti, dbName);
	
		if (!desti.exists())
			desti.mkdirs();

		try {
			file.createNewFile();
			copyFile(dbFile, file);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;
		}

		return Uri.fromFile(file);

	}

	private void copyFile(File src, File dst) throws IOException {
		@SuppressWarnings("resource")
		FileChannel inChannel = new FileInputStream(src).getChannel();
		@SuppressWarnings("resource")
		FileChannel outChannel = new FileOutputStream(dst).getChannel();
		try {
			inChannel.transferTo(0, inChannel.size(), outChannel);
		} finally {
			if (inChannel != null)
				inChannel.close();
			if (outChannel != null)
				outChannel.close();
		}

	}