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JaCoCo Code Coverage Report for Multi-Module Android Project

This guide explains how to set up and generate a complete code coverage report for a multi-module Android project using JaCoCo. It includes both unit and instrumented tests.

Steps to Implement JaCoCo in Your Project

1. Apply JaCoCo Plugin in All Modules

To begin, apply the JaCoCo plugin in all modules of your project (including the root module)

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/*
 * MIT License
 *
 * Copyright (c) 2018 Markus Deutsch
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is

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//In local.properties
tmdb_api_key = "xxxxxxxxxxxxxxxxxxxxxxxxxx"

//In build.gradle (Module: app)
buildTypes.each {
        Properties properties = new Properties()
        properties.load(project.rootProject.file("local.properties").newDataInputStream())
        def tmdbApiKey = properties.getProperty("tmdb_api_key", "")

        it.buildConfigField 'String', "TMDB_API_KEY", tmdbApiKey

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Gradle Dependency Resolution

Normal Gradle behavior

The default behavior of Gradle to pick the newest version also applies if a lower version has been declared locally, but another dependency transitively pulls in a newer version. This is in contrast with Maven, where a locally declared version will always win.

For example, if your build.gradle specifies the dependency org.springframework:spring-tx:3.2.3.RELEASE, and another dependency declares 4.0.5.RELEASE as a transitive dependency, then 4.0.5.RELEASE will take precedence:

dependencies {
    compile("org.springframework.data:spring-data-hadoop:2.0.0.RELEASE")
    compile("org.springframework:spring-tx:3.2.3.RELEASE")

// will select org.springframework:spring-tx:4.0.5.RELEASE

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 private String getRealPathFromURI(Context context, Uri contentUri) {
    Cursor cursor = null;
    try {
        String[] proj = { MediaStore.Images.Media.DATA };
        cursor = context.getContentResolver().query(contentUri,  proj, null, null, null);
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    } catch (Exception e) {
        Log.e(TAG, "getRealPathFromURI Exception : " + e.toString());

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        ImageView imageView = (ImageView) findViewById(R.id.card_thumbnail_image);
        Bitmap mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.rose);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP){
            //Default 
            imageView.setBackgroundResource(R.drawable.rose);
        } else {
            //RoundCorners 
            RoundCornersDrawable round = new RoundCornersDrawable(mBitmap,
                    getResources().getDimension(R.dimen.cardview_default_radius), 0); //or your custom radius

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        ImageView imageView = (ImageView) findViewById(R.id.card_thumbnail_image);
        Bitmap mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.rose);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP){
            //Default 
            imageView.setBackgroundResource(R.drawable.rose);
        } else {
            //RoundCorners 
            RoundCornersDrawable round = new RoundCornersDrawable(mBitmap,
                    getResources().getDimension(R.dimen.cardview_default_radius), 0); //or your custom radius

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// Custom interface that enables communication between Fragment and its Activity
public interface OnItemSelectedListener
{
	public void onItemSelected(String item);
}

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/*
 * BottomNavigationLayout library for Android
 * Copyright (c) 2016. Nikola Despotoski (http://github.com/NikolaDespotoski).
 * Licensed 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

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public class LocationIntentService extends IntentService {

    private GoogleApiClient mGoogleApiClient;

    public LocationIntentService() {
        super(LocationIntentService.class.getName());
    }

    @Override
    protected void onHandleIntent(Intent intent) {