This is a custom gradle modification for Ionic

build-extras.gradle

ext.postBuildExtras = { 

    dependencies {
    // Multidex lib for Android v4
        compile 'com.android.support:multidex:1.0.3'
    }

    android {
        dexOptions {
            jumboMode true
            javaMaxHeapSize "4g"
        }

        defaultConfig {
            multiDexEnabled true
        }

        compileOptions {
            sourceCompatibility JavaVersion.VERSION_1_7
            targetCompatibility JavaVersion.VERSION_1_7
        }
    }

 }

gradle-wrapper.properties

# Add this to the respective name file in ionic android folder
org.gradle.jvmargs=-Xmx4608M