rugved-in

import android.content.Context;
import android.os.Environment;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;

rugved-in

import android.annotation.TargetApi;
import android.os.Build;
import android.util.Base64;

import com.shikshaatoday.app.BuildConfig;

import java.io.UnsupportedEncodingException;
import java.math.BigInteger;
import java.nio.charset.StandardCharsets;
import java.security.InvalidAlgorithmParameterException;