Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.io.File;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import android.os.Environment;

public class Main {
    public final static String rootSaveCachePath = Environment.getExternalStorageDirectory().getPath()
            + "/.DLNA/cache";

    public static boolean isExistCache(String fileName) {
        fileName = rootSaveCachePath + "/" + getMD5Str(fileName) + ".png";
        return new File(fileName).exists();

    }

    public static String getMD5Str(String str) {
        MessageDigest messageDigest = null;
        try {
            messageDigest = MessageDigest.getInstance("MD5");

            messageDigest.reset();

            messageDigest.update(str.getBytes("UTF-8"));
        } catch (NoSuchAlgorithmException e) {
            System.out.println("NoSuchAlgorithmException caught!");
        } catch (UnsupportedEncodingException e) {
        }

        byte[] byteArray = messageDigest.digest();

        StringBuffer md5StrBuff = new StringBuffer();

        for (int i = 0; i < byteArray.length; i++) {
            if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)
                md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));
            else
                md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));
        }
        return md5StrBuff.substring(0, 24).toString().toUpperCase();
    }
}