Take Backup Sqlite Database from device programmatically

package com.example.sample;

import android.content.Intent;
import android.os.Environment;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import com.truetech.nec.util.NECSharedPref;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.nio.channels.FileChannel;

public class SplashScreen extends BaseActivity {


    // Splash screen timer    private static int SPLASH_TIME_OUT = 3000;

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

          //fucntion for taking sqlite database backup programmatically

          backupDB();

    }

 //fucntion for taking sqlite database backup programmatically

private void backupDB() {

    try {
        File sd = Environment.getExternalStorageDirectory();
        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            String currentDBPath = "/data/data/" + getPackageName() + "/databases/database.db";
            String backupDBPath = "databasename.db";
            File currentDB = new File(currentDBPath);
            File backupDB = new File(sd, backupDBPath);

            if (currentDB.exists()) {
                FileChannel src = new FileInputStream(currentDB).getChannel();
                FileChannel dst = new FileOutputStream(backupDB).getChannel();
                dst.transferFrom(src, 0, src.size());
                src.close();
                dst.close();
            }
        }
    } catch (Exception e) {

    }
}