Default Marker Clustering.

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild

app/.gitignore

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+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 28
+    defaultConfig {
+        applicationId "spartons.com.googlemapcustommarkercluster"
+        minSdkVersion 15
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+
+    // Support dependencies
+    implementation 'com.android.support:appcompat-v7:28.0.0'
+    implementation 'com.android.support:support-v4:28.0.0'
+    implementation 'com.android.support:animated-vector-drawable:28.0.0'
+    implementation 'com.android.support:support-media-compat:28.0.0'
+    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
+
+    testImplementation 'junit:junit:4.12'
+
+    // Marker clustering dependency
+    implementation 'com.google.maps.android:android-maps-utils:0.5'
+
+    // Google play services dependencies
+    implementation 'com.google.android.gms:play-services-location:16.0.0'
+    implementation 'com.google.android.gms:play-services-maps:16.1.0'
+
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+    implementation 'org.jetbrains:annotations-java5:15.0'
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/spartons/com/googlemapcustommarkercluster/ExampleInstrumentedTest.java

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+package spartons.com.googlemapcustommarkercluster;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("spartons.com.googlemapcustommarkercluster", appContext.getPackageName());
+    }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    package="spartons.com.googlemapcustommarkercluster"
+    android:targetSandboxVersion="1"
+    tools:ignore="UnusedAttribute">
+
+    <permission
+        android:name="spartons.com.googlemapcustommarkercluster.permission.MAPS_RECEIVE"
+        android:protectionLevel="signature" />
+
+    <uses-feature
+        android:glEsVersion="0x00020000"
+        android:required="true" />
+
+    <uses-permission android:name="android.permission.INTERNET" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme"
+        android:usesCleartextTraffic="true"
+        tools:ignore="AllowBackup,GoogleAppIndexingWarning,UnusedAttribute">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <meta-data
+            android:name="com.google.android.geo.API_KEY"
+            android:value="@string/google_maps_api_key" />
+
+        <meta-data
+            android:name="com.google.android.gms.version"
+            android:value="@integer/google_play_services_version" />
+
+    </application>
+
+</manifest>

app/src/main/java/spartons/com/googlemapcustommarkercluster/MainActivity.java

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+package spartons.com.googlemapcustommarkercluster;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.view.WindowManager;
+
+import com.google.android.gms.maps.GoogleMap;
+import com.google.android.gms.maps.OnMapReadyCallback;
+import com.google.android.gms.maps.SupportMapFragment;
+import com.google.android.gms.maps.model.LatLng;
+import com.google.maps.android.clustering.ClusterManager;
+
+import java.util.Arrays;
+import java.util.List;
+
+import spartons.com.googlemapcustommarkercluster.data.User;
+import spartons.com.googlemapcustommarkercluster.util.GoogleMapHelper;
+
+public class MainActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        getWindow().setFlags(
+                WindowManager.LayoutParams.FLAG_FULLSCREEN,
+                WindowManager.LayoutParams.FLAG_FULLSCREEN
+        );
+        setContentView(R.layout.activity_main);
+        SupportMapFragment supportMapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.mapFragment);
+        assert supportMapFragment != null;
+        supportMapFragment.getMapAsync(new OnMapReadyCallback() {
+            @Override
+            public void onMapReady(GoogleMap googleMap) {
+                GoogleMapHelper.defaultMapSettings(googleMap);
+                setUpClusterManager(googleMap);
+            }
+        });
+    }
+
+    private void setUpClusterManager(GoogleMap googleMap) {
+        ClusterManager<User> clusterManager = new ClusterManager<>(this, googleMap);
+        googleMap.setOnCameraIdleListener(clusterManager);
+        List<User> items = getItems();
+        clusterManager.addItems(items);
+        clusterManager.cluster();
+    }
+
+    private List<User> getItems() {
+        return Arrays.asList(
+                new User("CodingInfinite1", new LatLng(-31.563910, 147.154312)),
+                new User("CodingInfinite2", new LatLng(-33.718234, 150.363181)),
+                new User("CodingInfinite3", new LatLng(-33.727111, 150.371124)),
+                new User("CodingInfinite4", new LatLng(-33.848588, 151.209834)),
+                new User("CodingInfinite5", new LatLng(-33.851702, 151.216968)),
+                new User("CodingInfinite6", new LatLng(-34.671264, 150.863657)),
+                new User("CodingInfinite7", new LatLng(-35.304724, 148.662905)),
+                new User("CodingInfinite8", new LatLng(-36.817685, 175.699196)),
+                new User("CodingInfinite9", new LatLng(-36.828611, 175.790222)),
+                new User("CodingInfinite10", new LatLng(-37.750000, 145.116667)),
+                new User("CodingInfinite11", new LatLng(-37.759859, 145.128708)),
+                new User("CodingInfinite12", new LatLng(-37.765015, 145.133858)),
+                new User("CodingInfinite13", new LatLng(-37.770104, 145.143299)),
+                new User("CodingInfinite14", new LatLng(-37.773700, 145.145187)),
+                new User("CodingInfinite15", new LatLng(-37.774785, 145.137978)),
+                new User("CodingInfinite16", new LatLng(-37.819616, 144.968119)),
+                new User("CodingInfinite17", new LatLng(-38.330766, 144.695692)),
+                new User("CodingInfinite18", new LatLng(-39.927193, 175.053218)),
+                new User("CodingInfinite19", new LatLng(-41.330162, 174.865694)),
+                new User("CodingInfinite20", new LatLng(-42.734358, 147.439506)),
+                new User("CodingInfinite21", new LatLng(-42.734358, 147.501315)),
+                new User("CodingInfinite22", new LatLng(-42.735258, 147.438000)),
+                new User("CodingInfinite23", new LatLng(-43.999792, 170.463352))
+        );
+    }
+}

app/src/main/java/spartons/com/googlemapcustommarkercluster/data/User.java

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+package spartons.com.googlemapcustommarkercluster.data;
+
+
+import com.google.android.gms.maps.model.LatLng;
+import com.google.maps.android.clustering.ClusterItem;
+
+public class User implements ClusterItem {
+
+    private final String username;
+    private final LatLng latLng;
+
+    public User(String username, LatLng latLng) {
+        this.username = username;
+        this.latLng = latLng;
+    }
+
+    @Override
+    public LatLng getPosition() {
+        return latLng;
+    }
+
+    @Override
+    public String getTitle() {
+        return username;
+    }
+
+    @Override
+    public String getSnippet() {
+        return "";
+    }
+}

app/src/main/java/spartons/com/googlemapcustommarkercluster/util/GoogleMapHelper.java

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+package spartons.com.googlemapcustommarkercluster.util;
+
+import com.google.android.gms.maps.GoogleMap;
+
+import org.jetbrains.annotations.NotNull;
+
+public class GoogleMapHelper {
+
+    public static void defaultMapSettings(@NotNull GoogleMap googleMap) {
+        googleMap.getUiSettings().setZoomControlsEnabled(true);
+        googleMap.getUiSettings().setMapToolbarEnabled(false);
+        googleMap.getUiSettings().setRotateGesturesEnabled(true);
+        googleMap.getUiSettings().setMapToolbarEnabled(false);
+        googleMap.getUiSettings().setTiltGesturesEnabled(true);
+        googleMap.getUiSettings().setCompassEnabled(false);
+        googleMap.setBuildingsEnabled(true);
+    }
+}

app/src/main/res/drawable-v24/ic_launcher_foreground.xml

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+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillType="evenOdd"
+        android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="78.5885"
+                android:endY="90.9159"
+                android:startX="48.7653"
+                android:startY="61.0927"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
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+</vector>