Google Maps Android Custom Info Window Example

You can display information about a location where you add a marker on the Google map by customizing info window. This post shows how to define custom info window layout and custom info window adapter and use it to display customized info window on the Google map.

You can read my previous tutorial about Google maps android API to know how to use Google play service API in android applications and view Google maps android API examples.

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Google Maps Android Custom Info Window Example Output

Google Maps Android Custom Info Window Example

To create custom info window, first you need to define layout for info window with elements such as image and text view which you want to display in your custom info window.

<?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:id="@+id/name" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textAppearance="@style/TextAppearance.AppCompat.Headline" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent"/> <ImageView android:id="@+id/pic" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="8dp" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintTop_toBottomOf="@+id/name"/> <TextView android:id="@+id/details" android:layout_width="wrap_content" android:layout_height="wrap_content" android:singleLine="false" android:layout_marginTop="8dp" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toBottomOf="@+id/pic" /> <TextView android:id="@+id/hotels" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="8dp" android:textColor="#c2185b" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toBottomOf="@+id/details"/> <TextView android:id="@+id/food" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="8dp" android:textColor="#1976d2" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toBottomOf="@+id/hotels"/> <TextView android:id="@+id/transport" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="8dp" android:textColor="#64dd17" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toBottomOf="@+id/food"/> </android.support.constraint.ConstraintLayout>

After custom info window layout is defined, you need to define custom InfoWindowAdapter class by implementing GoogleMap.InfoWindowAdapter interface. InfoWindowAdapter interface has two methods getInfoContents and getInfoWindow methods which you need to implement.

If you want to define your own window, you need to implement getInfoWindow method otherwise just return null to indicate that you use default window. To provide content for info window, you need to implement getInfoContents methods. You need to use your custom layout in this method and populate values into the elements of the layout.

To pass information from activity to custom InfoWindowAdapter, you can create data transfer object. In your activity, this object is added to marker using setTag method passing the object. Since Marker object is passed to getInfoContents method, you can get tag object and use data to populate elements in info window layout as show in the example.

import android.app.Activity; import android.content.Context; import android.view.View; import android.widget.ImageView; import android.widget.TextView; import com.google.android.gms.maps.GoogleMap; import com.google.android.gms.maps.model.Marker; public class CustomInfoWindowGoogleMap implements GoogleMap.InfoWindowAdapter { private Context context; public CustomInfoWindowGoogleMap(Context ctx){ context = ctx; } @Override public View getInfoWindow(Marker marker) { return null; } @Override public View getInfoContents(Marker marker) { View view = ((Activity)context).getLayoutInflater() .inflate(R.layout.map_custom_infowindow, null); TextView name_tv = view.findViewById(R.id.name); TextView details_tv = view.findViewById(R.id.details); ImageView img = view.findViewById(R.id.pic); TextView hotel_tv = view.findViewById(R.id.hotels); TextView food_tv = view.findViewById(R.id.food); TextView transport_tv = view.findViewById(R.id.transport); name_tv.setText(marker.getTitle()); details_tv.setText(marker.getSnippet()); InfoWindowData infoWindowData = (InfoWindowData) marker.getTag(); int imageId = context.getResources().getIdentifier(infoWindowData.getImage().toLowerCase(), "drawable", context.getPackageName()); img.setImageResource(imageId); hotel_tv.setText(infoWindowData.getHotel()); food_tv.setText(infoWindowData.getFood()); transport_tv.setText(infoWindowData.getTransport()); return view; } }

In the activity, first define marker options and add to map, then instantiate data object, populate values and add it to Marker by calling setTag and finally instantiate custom info window class and add it to Marker by calling setInfoWindowAdapter method.

import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import com.google.android.gms.maps.CameraUpdateFactory; 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.BitmapDescriptorFactory; import com.google.android.gms.maps.model.LatLng; import com.google.android.gms.maps.model.Marker; import com.google.android.gms.maps.model.MarkerOptions; public class GoogleMapInfoWindowActivity extends AppCompatActivity implements OnMapReadyCallback { private GoogleMap mMap; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.maps_infowindow); SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.gmap); mapFragment.getMapAsync(this); } @Override public void onMapReady(GoogleMap googleMap) { mMap = googleMap; mMap.getUiSettings().setZoomControlsEnabled(true); mMap.setMinZoomPreference(11); LatLng snowqualmie = new LatLng(47.5287132, -121.8253906); MarkerOptions markerOptions = new MarkerOptions(); markerOptions.position(snowqualmie) .title("Snowqualmie Falls") .snippet("Snoqualmie Falls is located 25 miles east of Seattle.") .icon(BitmapDescriptorFactory.defaultMarker( BitmapDescriptorFactory.HUE_BLUE)); InfoWindowData info = new InfoWindowData(); info.setImage("snowqualmie"); info.setHotel("Hotel : excellent hotels available"); info.setFood("Food : all types of restaurants available"); info.setTransport("Reach the site by bus, car and train."); CustomInfoWindowGoogleMap customInfoWindow = new CustomInfoWindowGoogleMap(this); mMap.setInfoWindowAdapter(customInfoWindow); Marker m = mMap.addMarker(markerOptions); m.setTag(info); m.showInfoWindow(); mMap.moveCamera(CameraUpdateFactory.newLatLng(snowqualmie)); } }

Below is the data transfer object used to transfer data from activity to info window adapter class.