Base64

public class XOREncrypt {
    public static String encrypt(String str, String key) {
        if (str == null || "".equals(str) || key == null || "".equals(key)) {
            return str;
        }
        try {
            char[] data = str.toCharArray();
            char[] keyData = key.toCharArray();
            int keyIndex = 0;
            for (int x = 0; x < data.length; x++) {
                data[x] = (char) (data[x] ^ keyData[keyIndex]);
                keyIndex++;
                if (keyIndex == keyData.length) {
                    keyIndex = 0;
                }
            }
            return new String(data);
        } catch (Exception e) {
            e.printStackTrace();
            return str;
        }

}

public class XOREncrypt {
    public static String encrypt(String str, String key) {
        if (str == null || "".equals(str) || key == null || "".equals(key)) {
            return str;
        }
        try {
            char[] data = str.toCharArray();
            char[] keyData = key.toCharArray();
            int keyIndex = 0;
            for (int x = 0; x < data.length; x++) {
                data[x] = (char) (data[x] ^ keyData[keyIndex]);
                keyIndex++;
                if (keyIndex == keyData.length) {
                    keyIndex = 0;
                }
            }
            return new String(data);
        } catch (Exception e) {
            e.printStackTrace();
            return str;
        }
    }

import android.app.Activity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

public class SActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        EncryptUtils EU = new EncryptUtils();
        String strKey = EU.getDecryptKey();
        String strEnc = EU.encrypt("http://47.104.140.194:8080/login", strKey);
        String strDec = EU.decrypt(strEnc, strKey);
        Log.d("strEnc",strEnc);
        Log.d("strDec",strDec);
        //Toast.makeText(this,strEnc+"请求网络失败"+strDec,Toast.LENGTH_LONG).show();
    }


}