ExampleUtils.java

package com.samsung.spensdk.example.bgfg;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import android.util.Log;

public class ExampleUtils {

	public static String getFileExtension(File f) 
	{
		int idx = f.getName().lastIndexOf(".");
		if (idx == -1)
			return "";
		else 
			return f.getName().substring(idx+1);
	}

	public static String fileNameRemoveExtension(String fileName)
	{
		if(fileName == null)
			return null;

		int idx = fileName.lastIndexOf(".");

		if(idx == -1)
			return fileName;

		else
			return fileName.substring(0, idx);		
	}

	public static String stringCheck(String str) {
		StringBuilder strbuilder = new StringBuilder();

		int size = str.length();
		for(int i = 0; i < size; i++) {
			char curChar = str.charAt(i);
			if(curChar == '\\' || curChar == '/' || curChar == ':' || curChar == '*' || curChar == '?' || curChar == '"' 
				|| curChar == '<' || curChar == '>' || curChar == '|') {
				strbuilder.append('_');
			}else
				strbuilder.append(curChar);
		}
		return strbuilder.toString();
	}

	public static String getUniqueFilename(File folder, String filename, String ext) {
		if (folder == null || filename == null) return null;

		String curFileName;
		File curFile;

		if(filename.length() > 20){
			filename = filename.substring(0, 19);
		}

		filename = stringCheck(filename);

		int i = 1;
		do {
			curFileName = String.format("%s_%02d.%s", filename, i++, ext);
			curFile = new File(folder, curFileName);
		} while (curFile.exists());
		return curFileName;
	}

	public static byte[] readBytedata (String aFilename) {
		byte[] imgBuffer = null;

		FileInputStream fileInputStream = null;
		try {
			File file = new File(aFilename);
			fileInputStream = new FileInputStream(file);
			int byteSize = (int)file.length();
			imgBuffer = new byte[byteSize];

			if ( fileInputStream.read(imgBuffer) == -1 ) {
				Log.e(SPen_Example_BackgroundForeground.TAG, "failed to read image");
			}
			fileInputStream.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();            
		} catch (IOException e2) {
			e2.printStackTrace();            
		} finally {
			if(fileInputStream != null) {
				try{

					fileInputStream.close();

				} catch (IOException e) {
					e.printStackTrace();            
				} 
			}
		}


		return imgBuffer;
	}

	public static boolean writeBytedata (String aFilename, byte[] imgBuffer) {

		FileOutputStream fileOutputStream = null;
		boolean result = true;

		try {
			File file = new File(aFilename);
			fileOutputStream = new FileOutputStream(file);
			fileOutputStream.write(imgBuffer);

			fileOutputStream.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
			result = false;
		} catch (IOException e2) {
			e2.printStackTrace();
			result = false;
		} finally {
			if(fileOutputStream != null) {
				try{

					fileOutputStream.close();

				} catch (IOException e) {
					e.printStackTrace(); 
					result = false;
				} 
			}        	
		}

		return result;
	}
}