FileUtils.java

package com.cellasoft.univrapp.utils;

import android.content.Context;

import java.io.*;
import java.nio.channels.FileChannel;

public class FileUtils {

    public static void copyFile(File sourceFile, File destFile)
            throws IOException {
        if (!destFile.exists()) {
            destFile.createNewFile();
        }

        FileChannel source = null;
        FileChannel destination = null;
        try {
            source = new FileInputStream(sourceFile).getChannel();
            destination = new FileOutputStream(destFile).getChannel();
            destination.transferFrom(source, 0, source.size());
        } finally {
            StreamUtils.closeQuietly(source);
            StreamUtils.closeQuietly(destination);
        }
    }

    public static void save(String content, String fileName) throws IOException {
        FileOutputStream os = new FileOutputStream(fileName);
        OutputStreamWriter writer = new OutputStreamWriter(os);
        writer.write(content);
        os.flush();
        StreamUtils.closeQuietly(os);
    }

    public static String getFileFromAssets(Context context, String fileName) {
        try {
            return StreamUtils.readAllText(context.getAssets().open(fileName));
        } catch (IOException e) {
            e.printStackTrace();
        }

        return "<p>Errore durante l'appertura del file <b>" + fileName
                + "</b></p>";
    }
}