Expo mapview example

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Easy example for using features, libraries, and other integrations with the Expo SDK! If you'd like to contribute something, please check out our contributing guide!

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Contributions of any kind welcome! Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

Sign up. HTML Branch: master. Find file. Sign in Sign up. Go back. Launching Xcode If nothing happens, download Xcode and try again. Latest commit. EvanBacon Added more storybook images. Latest commit f8c6 Mar 30, Managed Workflow. Bare Workflow. Learn the Basics React Native is like React, but it uses native components instead of web components as building blocks.

So to understand the basic structure of a React Native app, you need to understand some of the basic React concepts, like JSX, components, stateand props.

Build a To Do app with React Native and Expo

If you already know React, you still need to learn some React-Native-specific stuff, like the native components. This tutorial is aimed at all audiences, whether you have React experience or not. Hello World. In accordance with the ancient traditions of our people, we must first build an app that does nothing except say "Hello, world!

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Here it is:. If you are feeling curious, you can play around with sample code directly in the web simulators. You can also paste it into your App.

What's going on here? Some of the things in here might not look like JavaScript to you. Don't panic. This is the future. First of all, ES also known as ES6 is a set of improvements to JavaScript that is now part of the official standard, but not yet supported by all browsers, so often it isn't used yet in web development. React Native ships with ES support, so you can use this stuff without worrying about compatibility. If you aren't familiar with ES, you can probably pick it up by reading through sample code like this tutorial has.

If you want, this page has a good overview of ES features. Many frameworks use a specialized templating language which lets you embed code inside markup language. In React, this is reversed. JSX lets you write your markup language inside code.A MapView displays a 2D view of a Map instance.

An instance of MapView must be created to render a Map along with its operational and base layers in 2D. To render a map and its layers in 3D, see the documentation for SceneView. For a general overview of views, see View. Each is set in the map and container properties respectively.

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In addition to being responsible for the rendering of the Map and its elements, the MapView handles the interaction between the user and the map. For example, the traditional map scale isn't set on the Map ; it's set on the MapView.

You can set the initial extent or visible portion of the map by using either a combination of center and zoomor by setting the extent property.

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For live examples of view. Because some view properties override one another e. The following table describes which properties have priority during view construction properties that are overridden will have no effect during construction.

Because the View handles user interaction, events such as click are handled on the MapView. Animations are also possible with the goTo method, which allows you to change or move the MapView from one extent to another. MapView navigation is enabled by default and includes mouse interaction as described in the table below.

To disable MapView navigation, you must call the stopPropagation method on the event objects of the pointer or gesture events that trigger the navigation. See our samples on disabling view navigation for examples. Gamepads and 3Dconnexion devices, like the SpaceMouse, can be used for navigation when view. To enable zooming in MapView, view. Please see GamepadInputDevice for supported devices.

To disable gamepad navigation, you can set view. Note: Zoom snapping must be disabled for continuous zooming. When users interact with the MapView, their actions trigger events that you can listen and respond to. For example, you can listen when a user moves the mouse over the map and display the coordinates at the mouse location.

This is called a pointer-move event. See the MapView events section for a list of all the events. It is important to note that some events are dependent on each other and the timing of the user interaction can influence the type of event that gets triggered. For example, a single click triggers a series of events: pointer-down when the user presses the mouse button, pointer-up when they release the mouse button.

An immediate-click event gets triggered right after the pointer-up event. The click event is only triggered after making sure that the user doesn't click a second time in which case it would trigger a double-click event. In the case of a double-click, the same event chain is repeated after the first click. However, if the user clicks a second time within a close time range, then the click event is not emited anymore, but the pointer-downpointer-up and immediate-click events are triggered again.

After two immediate-click events, a double-click event gets triggered along with an immediate-double-click event. The difference between the two is that an immediate-double-click cannot be prevented by the use of stopPropagation on the immediate-click event and can therefore be used to react to double-clicking independently of usage of the immediate-click event.

These events are also used internally for navigation, popups or different interactive tools like measurement or sketch. In some use cases, adding additional event listeners might interfere with the default event listeners.

For example, adding an immediate-click event to open up a popup, will interfere with the default click event that also opens up a popup. See the Event explorer sample, to visualize the different events that get triggered when you interact with the view.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

If nothing happens, download GitHub Desktop and try again.


If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. See Installation Instructions. Due to the rapid changes being made in the React Native ecosystem, we are not officially going to support this module on anything but the latest version of React Native. If you are using an older version of React Native with this module though, some features may be buggy. Since react-native 0.

React Native versions from 0. This MapView component is built so that features on the map such as Markers, Polygons, etc. This provides an intuitive and react-like API for declaratively controlling features on the map. Tiles can be stored locally within device using xyz tiling scheme and displayed as tile overlay as well. This is usefull especially for offline map usage when tiles are available for selected map region within device storage.

For Android: LocalTile is still just overlay over original map tiles. It means that if device is online, underlying tiles will be still downloaded.

For example:. See OSM Wiki for how to download tiles for offline usage. Place components you that wish to overlay MapView underneath the MapView closing tag.

Absolutely position these elements. Create the json object, or download a generated one from the google style generator. This example displays some of them in a log as a demonstration. One can change the mapview's position using refs and component methods, or by passing in an updated region prop. The component methods will allow one to animate to a given position like the native API could.

This allows one to animate the zoom and position of the MapView along with other gestures, giving a nice feel.

MapView Example

Issue: Since android needs to render its marker views as a bitmap, the animations APIs may not be compatible with the Marker views. Not sure if this can be worked around yet or not. Default markers will be rendered unless a custom marker is specified. One can optionally adjust the color of the default marker by using the pinColor prop.

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Callouts to markers can be completely arbitrary react views, similar to markers. As a result, they can be interacted with like any other view. Custom callout views can be the entire tooltip bubble, or just the content inside of the system default bubble.

See Callouts.To use this in a bare React Native appfollow the installation instructions. Managed Workflow. Bare Workflow. No setup required for use within the Expo Client app. See below for instructions on how to configure for deployment as a standalone app on Android and iOS. Deploying to a standalone app on Android.

If you have already integrated Google Sign In into your standalone app, this is very easy. Otherwise, there are some additional steps. If you already have Google Sign In configured. In app. If you already have not configured Google Sign In. Build your app, take note of your Android package name eg: ca. Choose the Android apps radio button under Key restriction. Add your android.

expo mapview example

Copy Google Certificate Fingerprint from the output from step 9 and insert it in the "SHA-1 certificate fingerprint" field. Copy the API key the first text input on the page into app. See an example diff. Press Save and then rebuild the app like in step 1.

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Deploying to the Google Play Store. Since your app is most likely using App Signing by Google Play, you will need to grab their app signing certificate in production rather than the upload certificate returned by expo fetch:android:hashes. Deploying Google Maps to a standalone app on iOS.

Apple Maps will work with no extra configuration.

expo mapview example

For Google Maps:. Open your browser to the Google API Manager and create a project, or select your existing project if you've already made one for this app. Choose the iOS apps radio button under Key restriction. Under Accept requests from an iOS application with one of these bundle identifiersclick the Add an item button. Add your ios. Note: This can also be accessed through your app's Constants via Constants. If you ejected after already configuring Google Maps, the eject step may have already provided this for you.

Web Setup. Web is experimental! You may need to add the web target to your Expo app.Managed Workflow. Bare Workflow. Networking Many mobile apps need to load resources from a remote URL. Using Fetch. Making requests. Fetch also takes an optional second argument that allows you to customize the HTTP request.

You may want to specify additional headers, or make a POST request:. Take a look at the Fetch Request docs for a full list of properties. Handling the response. The above examples show how you can make a request.

expo mapview example

In many cases, you will want to do something with the response. Networking is an inherently asynchronous operation. Fetch methods will return a Promise that makes it straightforward to write code that works in an asynchronous manner:.

Don't forget to catch any errors that may be thrown by fetchotherwise they will be dropped silently. If you need to fetch from a cleartext URL one that begins with http you will first need to add an App Transport Security exception. If you know ahead of time what domains you will need access to, it is more secure to add exceptions only for those domains; if the domains are not known until runtime you can disable ATS completely.

See Apple's documentation for more information. Using Other Networking Libraries. This means that you can use third party libraries such as frisbee or axios that depend on it, or you can use the XMLHttpRequest API directly if you prefer. WebSocket Support. React Native also supports WebSocketsa protocol which provides full-duplex communication channels over a single TCP connection.

Known Issues with fetch and cookie based authentication. The following options are currently not working with fetch. Having same name headers on Android will result in only the latest one being present. Cookie based authentication is currently unstable. As a minimum on iOS, when redirected through aif a Set-Cookie header is present, the cookie is not set properly.

Since the redirect cannot be handled manually this might cause a scenario where infinite requests occur if the redirect is the result of an expired session.This tutorial is a continuation of Google maps in android apps tutorial and shows how to use MapView instead of SupportMapFragment to display Google maps in android applications.

It also covers Google maps UI controls or settings, gestures, events and lite mode topics which were not covered in the previous tutorial Google maps android tutorial.

You can find initial setup required to use Google maps android API in android projects at Google maps android tutorial. If you want to learn android and its latest features with examples. Please visit android tutorials to learn android concepts, components and libraries with examples.

You can enable UI controls such as compass, zoom controls, indoor level picker, and map tool bar by setting related attributes in xml or programmatically. By default UI controls are not displayed. Map toolbar will be visible on touching a marker. Map tool bar contains actions which take you to directions screen, google map app etc. Indoor level picker is applicable for building with floor plans, which allow you to see floor plan of selected level.

First you need to enable indoor maps by calling setIndoorEnabled and setting it true on GoogleMap object. By default user can tilt, pinch to stretch, zoom, rotate and scroll map. You can change the camera position programmatically or in xml. Some of the camera position attributes are target position, bearing, tilt and zoom. Bearing is the direction the camera is pointing, which is in degrees clock wise from north. Tilt is camera angle in degrees from the line when it is directly facing the earth.

Classes which are used to configure camera position are CameraPosition. Using CameraPosition. Builder, you can define camera position and then you can apply new camera position to GoogleMap using moveCamera method which takes CameraUpdate as parameter. If you use CameraPosition.

You can update camera position in response to events. Below example shows how to update camera position. Camera position can be updated in response to events, below example shows zoom change in response to OnMapClick event using OnMapClickListener as shown below.

There are several event handlers which you can implement and add to GoogleMap to provide custom behavior in response to user interaction on Google maps. Based on the reason for camera motion, you can do something. Possible reasons for camera motion are GoogleMap. In onCircleClick method, you can use Circle object, which is clicked, to change circle settings or other customizations on map.

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Method onInfoWindowClick is passed the Marker object to which info window anchored. Using the Marker object, you can customize marker or info window in the handler method. Return true to override the default behavior. PointOfInterest object which is passed to onPoiClick method can be used to get information about point of interest and do something like adding marker to POI and moving camera to POI as shown in the below example. You can add the listener to GoogleMap object by calling setOnPolygonClickListener, using polygon object passed to the handler method, you can customize the map.

You can display Google map in lite mode in android apps by setting lite mode attribute to true in xml or programmatically.

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