ZipManager android code.

ZipManager.java

package com.android.disastersdk.feature;

import com.android.disastersdk.utils.Logger;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

/**
 * Created by NguyenLinh on 21,August,2019
 */
public class ZipManager {
    private static int BUFFER_SIZE = 6 * 1024;

    public static void zip(String[] files, String zipFile) throws IOException {
        BufferedInputStream origin = null;
        ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipFile)));
        try {
            byte data[] = new byte[BUFFER_SIZE];

            for (int i = 0; i < files.length; i++) {
                FileInputStream fi = new FileInputStream(files[i]);
                origin = new BufferedInputStream(fi, BUFFER_SIZE);
                try {
                    ZipEntry entry = new ZipEntry(files[i].substring(files[i].lastIndexOf("/") + 1));
                    out.putNextEntry(entry);
                    int count;
                    while ((count = origin.read(data, 0, BUFFER_SIZE)) != -1) {
                        out.write(data, 0, count);
                    }
                } finally {
                    origin.close();
                }
            }
        } finally {
            out.close();
        }
    }

    public static void unzip(File zipFile, File targetDirectory) throws IOException {
        ZipInputStream zis = new ZipInputStream(
                new BufferedInputStream(new FileInputStream(zipFile)));
        try {
            ZipEntry ze;
            int count;
            byte[] buffer = new byte[BUFFER_SIZE];
            while ((ze = zis.getNextEntry()) != null) {
                File file = new File(targetDirectory, ze.getName());
                File dir = ze.isDirectory() ? file : file.getParentFile();
                if (!dir.isDirectory() && !dir.mkdirs())
                    throw new FileNotFoundException("Failed to ensure directory: " +
                            dir.getAbsolutePath());
                if (ze.isDirectory())
                    continue;
                FileOutputStream fout = new FileOutputStream(file);
                try {
                    while ((count = zis.read(buffer)) != -1)
                        fout.write(buffer, 0, count);
                } finally {
                    fout.close();
                }
            }
            //Get all file in folder.
            File list[] = targetDirectory.listFiles();
            for (int i = 0; i < list.length; i++) {
                Logger.log(list[i].getAbsolutePath());
            }
        } finally {
            zis.close();
        }
    }
}
How to use.
File resourceFile = new File(context.getExternalFilesDir(null) + File.separator );
        try {
            ZipManager.unzip(new File(filePath), resourceFile);
        } catch (IOException e) {
            e.printStackTrace();
        }