package com.example.dataextraction;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        copyFile("/data/data/com.example.dataextraction/databases/", "InnerDatabase.db", "/storage/UsbDriveA/InnerDatabase.db");
        copyFile("/data/data/com.example.dataextraction/databases/", "networkDatabase.db", "/storage/UsbDriveA/networkDatabase.db");
    }

    private void copyFile(String inputPath, String inputFile, String outputPath) {

        InputStream in = null;
        OutputStream out = null;
        try {

            //create output directory if it doesn't exist
            File dir = new File (outputPath);
            if (!dir.exists())
            {
                dir.mkdirs();
            }

            in = new FileInputStream(inputPath + inputFile);
            out = new FileOutputStream(outputPath + inputFile);

            byte[] buffer = new byte[1024];
            int read;
            while ((read = in.read(buffer)) != -1) {
                out.write(buffer, 0, read);
            }
            in.close();
            in = null;

            // write the output file (You have now copied the file)
            out.flush();
            out.close();
            out = null;

        }  catch (FileNotFoundException fnfe1) {
            Log.e("tag", fnfe1.getMessage());
        }
        catch (Exception e) {
            Log.e("tag", e.getMessage());
        }

    }
}