Андроид Java Работа с файлами

public class FSL {
    public final int PLACE_INTERNAL_CASHE = 0;
    public final int PLACE_INTERNAL_FILES = 1;
    public final int PLACE_EXTERNAL_CASHE = 2;
    public final int PLACE_EXTERNAL_FILES = 3;
    public final int PLACE_EXTERNAL_STORAGE = 4;
    //public final int PLACE_EXTERNAL_STORAGE_PUBLIC = 5;
    public final String LOG_TAG = "FSL";
 
    public FSL() {
    }
 
    public void FileSave(int place, String relativePath, String fileName, byte[] bytes) {
        File path = GetPlacePath(place);
        if (path == null) return;
        path = new File(path.getAbsolutePath() + "/" + relativePath);
        path.mkdir();
        File file = new File(path, fileName);
        try {
            FileOutputStream fout = new FileOutputStream(file);
            fout.write(bytes);
            fout.close();
            Log.d(LOG_TAG, "File save: " + file.getAbsolutePath());
        } catch (IOException e) {
            Log.e(LOG_TAG, e.getMessage());
        } catch (Exception ex) {
            Log.e(LOG_TAG, ex.getMessage());
        }
    }
 
    public byte[] FileLoad(int place, String relativePath, String fileName) {
        byte[] bytes = new byte[0];
        File path = GetPlacePath(place);
        if (path == null) return bytes;
        path = new File(path.getAbsolutePath() + "/" + relativePath);
        File file = new File(path, fileName);
        try {
            FileInputStream fin = new FileInputStream(file);
            bytes = new byte[fin.available()];
            fin.read(bytes);
            fin.close();
            Log.d(LOG_TAG, "File load: " + file.getAbsolutePath());
        } catch (IOException e) {
            Log.e(LOG_TAG, e.getMessage());
        } catch (Exception ex) {
            Log.e(LOG_TAG, ex.getMessage());
        }
        return bytes;
    }
 
    public void FileDelete(int place, String relativePath, String fileName) {
        File path = GetPlacePath(place);
        if (path == null) return;
        path = new File(path.getAbsolutePath() + "/" + relativePath);
        File file = new File(path, fileName);
        try {
            String str = file.getAbsolutePath();
            file.delete();
            Log.d(LOG_TAG, "File deleted: " + str);
        } catch (Exception e) {
            Log.e(LOG_TAG, e.getMessage());
        }
    }
 
    public File GetPlacePath(int place) {
        File path = null;
        if ((place == PLACE_EXTERNAL_CASHE)
                || (place == PLACE_EXTERNAL_FILES)
                || (place == PLACE_EXTERNAL_STORAGE)) {
            if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                Log.d(LOG_TAG, "SD-card not available: " + Environment.getExternalStorageState());
                return path;
            }
        }
        switch (place) {
            case PLACE_INTERNAL_CASHE:
                path = getCacheDir();
                break;
            case PLACE_INTERNAL_FILES:
                path = getFilesDir();
                break;
            case PLACE_EXTERNAL_CASHE:
                path = getExternalCacheDir();
                break;
            case PLACE_EXTERNAL_FILES:
                path = getExternalFilesDir(null);
                break;
            case PLACE_EXTERNAL_STORAGE:
                path = Environment.getExternalStorageDirectory();
                break;
//                case PLACE_EXTERNAL_STORAGE_PUBLIC:
//                    path = Environment.getExternalStoragePublicDirectory(null);
//                    break;
        }
        return path;
    }
}
 
public void Test() {
    String relativePath = "relativePath";
    Calendar calendar = Calendar.getInstance();
    String fileName = String.format("fileName_%tY%tm%td%tH%tM%tS",
            calendar, calendar, calendar, calendar, calendar, calendar);
    byte[] bytes = new byte[]{
            (byte) (calendar.get(Calendar.YEAR) - 2000),
            (byte) calendar.get(Calendar.MONTH),
            (byte) calendar.get(Calendar.DAY_OF_MONTH),
            (byte) calendar.get(Calendar.HOUR_OF_DAY),
            (byte) calendar.get(Calendar.MINUTE),
            (byte) calendar.get(Calendar.SECOND)
    };
    FSL fsl = new FSL();
    Log.d(fsl.LOG_TAG, "Start FSL");
    for (int i = 0; i < 5; i++) {
        Log.d(fsl.LOG_TAG, "i=" + Integer.toString(i));
        fsl.FileSave(i, relativePath, fileName, bytes);
        if (bytes[5] != fsl.FileLoad(i, relativePath, fileName)[5])
            Log.d(fsl.LOG_TAG, "ERROR");
        fsl.FileDelete(i, relativePath, fileName);
    }
}