apply plugin: 'com.android.application'
apply plugin: 'jacoco'

android {
    compileSdkVersion 22
    buildToolsVersion "22.0.1"

    defaultConfig {
        applicationId "ninja.bryansills.jacocotest"
        minSdkVersion 16
        targetSdkVersion 22
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }

    packagingOptions {
        exclude 'LICENSE.txt'
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_7
        targetCompatibility JavaVersion.VERSION_1_7
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        debug {
            testCoverageEnabled true
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.1.1'

    androidTestCompile 'com.android.support.test:runner:0.2'
    androidTestCompile 'com.android.support.test:rules:0.2'
    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.1'
}

package com.example;

import android.os.Bundle;
import android.support.test.runner.AndroidJUnitRunner;
import android.util.Log;

import java.lang.reflect.Method;

public class AndroidJacocoTestRunner extends AndroidJUnitRunner {

    static {
        System.setProperty("jacoco-agent.destfile", "/data/data/"+BuildConfig.APPLICATION_ID+"/coverage.ec");
    }

    @Override
    public void finish(int resultCode, Bundle results) {
        try {
            Class rt = Class.forName("org.jacoco.agent.rt.RT");
            Method getAgent = rt.getMethod("getAgent");
            Method dump = getAgent.getReturnType().getMethod("dump", boolean.class);
            Object agent = getAgent.invoke(null);
            dump.invoke(agent, false);
        } catch (Throwable e) {
            Log.d("JACOCO", e.getMessage());
        }
        super.finish(resultCode, results);
    }
}

android{
    ...
    defaultConfig {
      ....
      testInstrumentationRunner "com.example.AndroidJacocoTestRunner"
    }
}