AdMobUtil.java

/**
 *
 * This file is part of AdMobPlugin
 *
 * Copyright (c) 2013 Guillermo Calvo
 *
 * AdMobPlugin is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * AdMobPlugin is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License (http://www.gnu.org/copyleft/lesser.html)
 * for more details.
 *
 */

package com.guillermonkey.unity.admob;


import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Locale;

import android.app.Activity;
import android.content.Context;
import android.provider.Settings.Secure;
import android.util.Log;

import com.unity3d.player.UnityPlayer;


class AdMobUtil{

	static String getAndroidId(Context context){

		String androidId;

		Log.d(AdMobPlugin.LOGTAG, "Getting Android ID...");

		androidId = Secure.getString(context.getContentResolver(), "android_id");

		Log.d(AdMobPlugin.LOGTAG, "Android ID: " + androidId);

		return(androidId);
	}

	static String getMD5(String string) throws NoSuchAlgorithmException{

		String hash = null;

		Log.d(AdMobPlugin.LOGTAG, "Getting MD5(" + string + ")...");

		if(string != null && string.length() > 0){

			MessageDigest localMessageDigest = MessageDigest.getInstance("MD5");

			localMessageDigest.update(string.getBytes(), 0, string.length());

			hash = String.format(Locale.US, "%032X", new Object[]{ new BigInteger(1, localMessageDigest.digest()) } );
		}

		Log.d(AdMobPlugin.LOGTAG, "MD5(" + string + "): " + hash);

		return(hash);
	}

	static String getDeviceId(String androidId){

		String deviceId;

		Log.d(AdMobPlugin.LOGTAG, "Getting device ID(" + androidId + ")...");

		try{

			deviceId = AdMobUtil.getMD5(androidId);

		}catch(NoSuchAlgorithmException localNoSuchAlgorithmException){

			deviceId = androidId.substring(0, 32);
		}

		Log.d(AdMobPlugin.LOGTAG, "Android ID(" + androidId + ") => " + deviceId);

		return(deviceId);
	}

	static String guessSelfDeviceId(){

		Activity	currentActivity;
		String		androidId;
		String		testDeviceId = null;

		Log.d(AdMobPlugin.LOGTAG, "Guessing self device id...");

		try{

			currentActivity	= UnityPlayer.currentActivity;
			androidId		= AdMobUtil.getAndroidId( currentActivity.getApplicationContext() );
			testDeviceId	= AdMobUtil.getDeviceId(androidId);

			Log.i(AdMobPlugin.LOGTAG, "Guessed self device id: " + testDeviceId);

		}catch(Exception error){

			Log.e(AdMobPlugin.LOGTAG, "Could not guess self device id: " + error);
		}

		return(testDeviceId);
	}
}