get random string for Captcha - Android java.util

Android examples for java.util:Random String

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Description

get random string for Captcha

Demo Code

import android.content.Context;
import android.provider.Settings;
import android.telephony.PhoneNumberUtils;
import java.io.File;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Random;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main{

    public static String getCaptcha() {
        Random rd = new Random(System.currentTimeMillis());
        StringBuilder strBuilder = new StringBuilder("");
        String tmp = new String("123456789abcdefghijklmnopqrstuvwxyz");
        for (int i = 0; i < 8; i++) {
            strBuilder.append(tmp.charAt(rd.nextInt(35)));
        }/*from ww w .jav  a2s.c  om*/
        return strBuilder.toString();
    }

}

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