[안드로이드]로그인연동시 해시키(hashkey) 가져오는 법

로그인 연동시에 해시키가 필요한 데요, 다음은 해시키를 알 수 있는 코드 입니다.

로그캣에서 hashkey결과를 볼 수 있습니다.

package com.droid.login;


import com.facebook.FacebookSdk;
import com.facebook.appevents.AppEventsLogger;
import android.app.Activity;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.util.Base64;
import android.util.Log;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.Signature;
import android.util.Base64;
import android.util.Log;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MainActivity extends Activity {

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getHashKey();
    }

    private void getHashKey(){
        PackageInfo packageInfo = null;
        try {
            packageInfo = getPackageManager().getPackageInfo(getPackageName(), PackageManager.GET_SIGNATURES);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        if (packageInfo == null)
            Log.e("KeyHash", "KeyHash:null");

        for (Signature signature : packageInfo.signatures) {
            try {
                MessageDigest md = MessageDigest.getInstance("SHA");
                md.update(signature.toByteArray());
                Log.d("KeyHash", Base64.encodeToString(md.digest(), Base64.DEFAULT));
            } catch (NoSuchAlgorithmException e) {
                Log.e("KeyHash", "Unable to get MessageDigest. signature=" + signature, e);
            }
        }
    }

}