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chore: Cleaned up cluster diff demo (#1446)
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@dkhawk
dkhawk authored Jan 16, 2025
1 parent 1ba553d commit fc66e48
Showing 1 changed file with 124 additions and 129 deletions.
253 changes: 124 additions & 129 deletions demo/src/main/java/com/google/maps/android/utils/demo/ClusteringDiffDemoActivity.java
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Original file line number Diff line number Diff line change
Expand Up @@ -46,18 +46,32 @@
import java.util.ArrayList;
import java.util.List;

enum City {
ENFIELD(new LatLng(51.6524, -0.0838), "Enfield"),
ILFORD(new LatLng(51.5590, -0.0815), "Ilford"),
LONDON(new LatLng(51.5074, -0.1278), "London");

public final LatLng latLng;
public final String label;

City(LatLng latLng, String label) {
this.latLng = latLng;
this.label = label;
}
}

/**
* Demonstrates how to apply a diff to the current Cluster
*/
public class ClusteringDiffDemoActivity extends BaseDemoActivity implements ClusterManager.OnClusterClickListener<Person>, ClusterManager.OnClusterInfoWindowClickListener<Person>, ClusterManager.OnClusterItemClickListener<Person>, ClusterManager.OnClusterItemInfoWindowClickListener<Person> {
private ClusterManager<Person> mClusterManager;
private Person itemtoUpdate = new Person(ENFIELD, "Teach", R.drawable.teacher);

private static final LatLng ENFIELD = new LatLng(51.6524, -0.0838);
private static final LatLng ILFORD = new LatLng(51.5590, -0.0815);
public class ClusteringDiffDemoActivity extends BaseDemoActivity
implements ClusterManager.OnClusterClickListener<Person>,
ClusterManager.OnClusterInfoWindowClickListener<Person>,
ClusterManager.OnClusterItemClickListener<Person>,
ClusterManager.OnClusterItemInfoWindowClickListener<Person> {

private static final LatLng LONDON = new LatLng(51.5074, -0.1278);
LatLng midpoint = getMidpoint();
private final LatLng midpoint = getMidpoint();
private ClusterManager<Person> mClusterManager;
private Person itemToUpdate = new Person(City.ENFIELD.latLng, "Teach", R.drawable.teacher);
private int currentLocationIndex = 0;

protected int getLayoutId() {
Expand All @@ -71,11 +85,108 @@ public void onMapReady(@NonNull GoogleMap map) {
getMap().animateCamera(CameraUpdateFactory.newLatLngZoom(midpoint, 12));
}


private LatLng getMidpoint() {
double latitude = (ClusteringDiffDemoActivity.ENFIELD.latitude + ClusteringDiffDemoActivity.ILFORD.latitude + ClusteringDiffDemoActivity.LONDON.latitude) / 3;
double longitude = (ClusteringDiffDemoActivity.ENFIELD.longitude + ClusteringDiffDemoActivity.ILFORD.longitude + ClusteringDiffDemoActivity.LONDON.longitude) / 3;
return new LatLng(latitude, longitude);
double latitude = 0.0;
double longitude = 0.0;

for (City city: City.values()) {
latitude += city.latLng.latitude;
longitude += city.latLng.longitude;
}

int numCities = City.values().length;

return new LatLng(latitude / numCities, longitude / numCities);
}

@Override
public boolean onClusterClick(Cluster<Person> cluster) {
// Show a toast with some info when the cluster is clicked.
String firstName = cluster.getItems().iterator().next().name;
Toast.makeText(this, cluster.getSize() + " (including " + firstName + ")", Toast.LENGTH_SHORT).show();

// Zoom in the cluster. Need to create LatLngBounds and including all the cluster items
// inside of bounds, then animate to center of the bounds.

// Create the builder to collect all essential cluster items for the bounds.
LatLngBounds.Builder builder = LatLngBounds.builder();
for (ClusterItem item : cluster.getItems()) {
builder.include(item.getPosition());
}
// Get the LatLngBounds
final LatLngBounds bounds = builder.build();

// Animate camera to the bounds
try {
getMap().animateCamera(CameraUpdateFactory.newLatLngBounds(bounds, 200));
} catch (Exception e) {
e.printStackTrace();
}

return true;
}

@Override
public void onClusterInfoWindowClick(Cluster<Person> cluster) {
// Does nothing, but you could go to a list of the users.
}

@Override
public boolean onClusterItemClick(Person item) {
// Does nothing, but you could go into the user's profile page, for example.
return false;
}

@Override
public void onClusterItemInfoWindowClick(Person item) {
// Does nothing, but you could go into the user's profile page, for example.
}

@Override
protected void startDemo(boolean isRestore) {
if (!isRestore) {
getMap().moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(51.503186, -0.126446), 6));
}

mClusterManager = new ClusterManager<>(this, getMap());
mClusterManager.setRenderer(new PersonRenderer());
getMap().setOnCameraIdleListener(mClusterManager);
getMap().setOnMarkerClickListener(mClusterManager);
getMap().setOnInfoWindowClickListener(mClusterManager);
mClusterManager.setOnClusterClickListener(this);
mClusterManager.setOnClusterInfoWindowClickListener(this);
mClusterManager.setOnClusterItemClickListener(this);
mClusterManager.setOnClusterItemInfoWindowClickListener(this);

addItems();
mClusterManager.cluster();
}

private void addItems() {
// Marker in Enfield
mClusterManager.addItem(new Person(City.ENFIELD.latLng, "John", R.drawable.john));

// Marker in the center of London
itemToUpdate = new Person(City.LONDON.latLng, "Teach", R.drawable.teacher);
mClusterManager.addItem(itemToUpdate);
}

private void rotateLocation() {
// Update the current index to cycle through locations (0 = Enfield, 1 = Olford, 2 = London)
currentLocationIndex = (currentLocationIndex + 1) % City.values().length;

City nextCity = City.values()[currentLocationIndex];

LatLng newLocation = nextCity.latLng;
String cityName = nextCity.label;

Log.d("ClusterTest", "Item rotated to: " + newLocation.toString() + ", City: " + cityName);

if (itemToUpdate != null) {
itemToUpdate = new Person(newLocation, "Teach", R.drawable.teacher);
mClusterManager.updateItem(itemToUpdate); // Update the marker
mClusterManager.cluster();
}
}

/**
Expand Down Expand Up @@ -108,9 +219,7 @@ public PersonRenderer() {
@Override
protected void onBeforeClusterItemRendered(@NonNull Person person, @NonNull MarkerOptions markerOptions) {
// Draw a single person - show their profile photo and set the info window to show their name
markerOptions
.icon(getItemIcon(person))
.title(person.name);
markerOptions.icon(getItemIcon(person)).title(person.name);
}

@Override
Expand Down Expand Up @@ -180,118 +289,4 @@ protected boolean shouldRenderAsCluster(@NonNull Cluster<Person> cluster) {
return cluster.getSize() >= 2;
}
}


@Override
public boolean onClusterClick(Cluster<Person> cluster) {
// Show a toast with some info when the cluster is clicked.
String firstName = cluster.getItems().iterator().next().name;
Toast.makeText(this, cluster.getSize() + " (including " + firstName + ")", Toast.LENGTH_SHORT).show();

// Zoom in the cluster. Need to create LatLngBounds and including all the cluster items
// inside of bounds, then animate to center of the bounds.

// Create the builder to collect all essential cluster items for the bounds.
LatLngBounds.Builder builder = LatLngBounds.builder();
for (ClusterItem item : cluster.getItems()) {
builder.include(item.getPosition());
}
// Get the LatLngBounds
final LatLngBounds bounds = builder.build();

// Animate camera to the bounds
try {
getMap().animateCamera(CameraUpdateFactory.newLatLngBounds(bounds, 100));
} catch (Exception e) {
e.printStackTrace();
}

return true;
}

@Override
public void onClusterInfoWindowClick(Cluster<Person> cluster) {
// Does nothing, but you could go to a list of the users.
}

@Override
public boolean onClusterItemClick(Person item) {
// Does nothing, but you could go into the user's profile page, for example.
return false;
}

@Override
public void onClusterItemInfoWindowClick(Person item) {
// Does nothing, but you could go into the user's profile page, for example.
}

@Override
protected void startDemo(boolean isRestore) {
if (!isRestore) {
getMap().moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(51.503186, -0.126446), 6));
}

mClusterManager = new ClusterManager<>(this, getMap());
mClusterManager.setRenderer(new PersonRenderer());
getMap().setOnCameraIdleListener(mClusterManager);
getMap().setOnMarkerClickListener(mClusterManager);
getMap().setOnInfoWindowClickListener(mClusterManager);
mClusterManager.setOnClusterClickListener(this);
mClusterManager.setOnClusterInfoWindowClickListener(this);
mClusterManager.setOnClusterItemClickListener(this);
mClusterManager.setOnClusterItemInfoWindowClickListener(this);

addItems();
mClusterManager.cluster();
}

private void addItems() {
// Marker in Enfield
mClusterManager.addItem(new Person(ENFIELD, "John", R.drawable.john));

// Marker in the center of London
itemtoUpdate = new Person(LONDON, "Teach", R.drawable.teacher);
mClusterManager.addItem(itemtoUpdate);
}

private void rotateLocation() {
// Update the current index to cycle through locations (0 = Enfield, 1 = Olford, 2 = London)
currentLocationIndex = (currentLocationIndex + 1) % 3;


LatLng newLocation = switch (currentLocationIndex) {
case 0 -> ENFIELD;
case 1 -> ILFORD;
default -> LONDON;
};

String cityName = getCityName(newLocation);

Log.d("ClusterTest", "Item rotated to: " + newLocation.toString() + ", City: " + cityName);

if (itemtoUpdate != null) {
itemtoUpdate = new Person(newLocation, "Teach", R.drawable.teacher);
mClusterManager.updateItem(itemtoUpdate); // Update the marker
mClusterManager.cluster();
}
}

// Method to map LatLng to city name
private String getCityName(LatLng location) {
if (areLocationsEqual(location, ENFIELD)) {
return "Enfield";
} else if (areLocationsEqual(location, ILFORD)) {
return "Ilford";
} else if (areLocationsEqual(location, LONDON)) {
return "London";
} else {
return "Unknown City"; // Default case if location is not recognized
}
}

// Method to compare LatLng objects with a tolerance
private boolean areLocationsEqual(LatLng loc1, LatLng loc2) {
return Math.abs(loc1.latitude - loc2.latitude) < 1E-5 &&
Math.abs(loc1.longitude - loc2.longitude) < 1E-5;
}
}

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