How to copy content from a zip to an android directory?

If you have defined the permission and you use android 6+ besides adding the permission to your AndroidManifest.xml :

 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

You must manually require permissions by:

private static final int REQUEST_CODE_ASK_PERMISSIONS = 507;

    private void checkWritePermission(){
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
            // No action!.
        }else{
            ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_CODE_ASK_PERMISSIONS);
            return;
        }
    }


    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode){
            case REQUEST_CODE_ASK_PERMISSIONS:
                if(grantResults[0] != PackageManager.PERMISSION_GRANTED){
                    // Permiso negado.                                  
                }
            default:
                super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }

Asked about the routes you send to your method, the paths of the files must be defined within the external storage, for example:

String archivoZip = Environment.getExternalStorageDirectory() + "/Android/data/archivoszip/miarchivo.zip";
String directorioArchivosDecompresos  = Environment.getExternalStorageDirectory() + "/Android/data/archivosdescomprimidos/"; 

Copy content from a .zip to a directory on android.

For this you have to unzip and add this class that will be useful:

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import android.util.Log;

public class Decompressfile {

    private String zipFile;
    private String decompresslocation;

    public Decompressfile(String zipFile, String location) {
        this.zipFile = zipFile;
        this.decompresslocation = location;

        _dirChecker("");
    }

    public void unzip() {
        try  {
            FileInputStream fin = new FileInputStream(zipFile);
            ZipInputStream zin = new ZipInputStream(fin);
            ZipEntry ze = null;
            while ((ze = zin.getNextEntry()) != null) {
                Log.v("Decompress", "Unzipping " + ze.getName());

                if(ze.isDirectory()) {
                    _dirChecker(ze.getName());
                } else {
                    FileOutputStream fout = new FileOutputStream(decompresslocation + ze.getName());
                    BufferedOutputStream bufout = new BufferedOutputStream(fout);
                    byte[] buffer = new byte[1024];
                    int read = 0;
                    while ((read = zin.read(buffer)) != -1) {
                        bufout.write(buffer, 0, read);
                    }




                    bufout.close();

                    zin.closeEntry();
                    fout.close();
                }

            }
            zin.close();


            Log.d("Unzip", "Unzipping complete. path :  " + decompresslocation);
        } catch(Exception e) {
            Log.e("Decompress", "unzip", e);

            Log.d("Unzip", "Unzipping failed");
        }

    }

    private void _dirChecker(String dir) {
        File f = new File(decompresslocation + dir);

        if(!f.isDirectory()) {
            f.mkdirs();
        }
    }

}

To use it would be like this:

    String archivoZip = Environment.getExternalStorageDirectory() + "/Android/data/archivoszip/miarchivo.zip";
    String directorioArchivosDecompresos = Environment.getExternalStorageDirectory() + "/Android/data/archivosdescomprimidos/"; 

new Decompressfile(archivoZip, directorioArchivosDecompresos).unzip();

It may be a permission error. Check that you have the following line included in your AndroidManifest.xml:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

On the other hand, I do not know how you pass the path to your method, but you should do it on a route whose base was obtained like this:

Environment.getExternalStorageDirectory();