cordova-demo/myApp/platforms/android/CordovaLib/src/org/apache/cordova/BuildHelper.java

/*
       Licensed to the Apache Software Foundation (ASF) under one
       or more contributor license agreements.  See the NOTICE file
       distributed with this work for additional information
       regarding copyright ownership.  The ASF licenses this file
       to you under the Apache License, Version 2.0 (the
       "License"); you may not use this file except in compliance
       with the License.  You may obtain a copy of the License at

         http://www.apache.org/licenses/LICENSE-2.0

       Unless required by applicable law or agreed to in writing,
       software distributed under the License is distributed on an
       "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
       KIND, either express or implied.  See the License for the
       specific language governing permissions and limitations
       under the License.
*/

package org.apache.cordova;

/*
 * This is a utility class that allows us to get the BuildConfig variable, which is required
 * for the use of different providers.  This is not guaranteed to work, and it's better for this
 * to be set in the build step in config.xml
 *
 */

import android.app.Activity;
import android.content.Context;

import java.lang.reflect.Field;


public class BuildHelper {


    private static String TAG="BuildHelper";

    /*
     * This needs to be implemented if you wish to use the Camera Plugin or other plugins
     * that read the Build Configuration.
     *
     * Thanks to Phil@Medtronic and Graham Borland for finding the answer and posting it to
     * StackOverflow.  This is annoying as hell!  However, this method does not work with
     * ProGuard, and you should use the config.xml to define the application_id
     *
     */

    public static Object getBuildConfigValue(Context ctx, String key)
    {
        try
        {
            Class<?> clazz = Class.forName(ctx.getPackageName() + ".BuildConfig");
            Field field = clazz.getField(key);
            return field.get(null);
        } catch (ClassNotFoundException e) {
            LOG.d(TAG, "Unable to get the BuildConfig, is this built with ANT?");
            e.printStackTrace();
        } catch (NoSuchFieldException e) {
            LOG.d(TAG, key + " is not a valid field. Check your build.gradle");
        } catch (IllegalAccessException e) {
            LOG.d(TAG, "Illegal Access Exception: Let's print a stack trace.");
            e.printStackTrace();
        }

        return null;
    }

}