cordova-plugin-camera

This plugin defines a global navigator.camera object, which provides an API for taking pictures and for choosing images from the system's image library.

Although the object is attached to the global scoped navigator, it is not available until after the deviceready event.

document.addEventListener("deviceready", onDeviceReady, false);
function onDeviceReady() {
    console.log(navigator.camera);
}

Installation

cordova plugin add cordova-plugin-camera

It is also possible to install via repo url directly ( unstable )

cordova plugin add https://github.com/apache/cordova-plugin-camera.git

Plugin variables

The plugin uses the ANDROIDX_CORE_VERSION variable to configure androidx.core:core dependency. This allows to avoid conflicts with other plugins that have the dependency hardcoded. If no value is passed, it will use 1.6.+ as the default value.

The variable is configured on install time

cordova plugin add cordova-plugin-camera --variable ANDROIDX_CORE_VERSION=1.8.0

How to Contribute

Contributors are welcome! And we need your contributions to keep the project moving forward. You can[report bugs, improve the documentation, or contribute code.

There is a specific contributor workflow we recommend. Start reading there. More information is available on our wiki.

Have a solution? Send a Pull Request.

In order for your changes to be accepted, you need to sign and submit an Apache ICLA (Individual Contributor License Agreement). Then your name will appear on the list of CLAs signed by non-committers or Cordova committers.

And don't forget to test and document your code.

iOS Quirks

Since iOS 10 it's mandatory to provide an usage description in the info.plist if trying to access privacy-sensitive data. When the system prompts the user to allow access, this usage description string will displayed as part of the permission dialog box, but if you didn't provide the usage description, the app will crash before showing the dialog. Also, Apple will reject apps that access private data but don't provide an usage description.

This plugins requires the following usage descriptions:

• NSCameraUsageDescription specifies the reason for your app to access the device's camera.
• NSPhotoLibraryUsageDescription specifies the reason for your app to access the user's photo library.
• NSLocationWhenInUseUsageDescription specifies the reason for your app to access the user's location information while your app is in use. (Set it if you have CameraUsesGeolocation preference set to true)
• NSPhotoLibraryAddUsageDescription specifies the reason for your app to get write-only access to the user's photo library

To add these entries into the info.plist, you can use the edit-config tag in the config.xml like this:

<edit-config target="NSCameraUsageDescription" file="*-Info.plist" mode="merge">
    <string>need camera access to take pictures</string>
</edit-config>

<edit-config target="NSPhotoLibraryUsageDescription" file="*-Info.plist" mode="merge">
    <string>need photo library access to get pictures from there</string>
</edit-config>

<edit-config target="NSLocationWhenInUseUsageDescription" file="*-Info.plist" mode="merge">
    <string>need location access to find things nearby</string>
</edit-config>

<edit-config target="NSPhotoLibraryAddUsageDescription" file="*-Info.plist" mode="merge">
    <string>need photo library access to save pictures there</string>
</edit-config>

API Reference

• camera
  • .getPicture(successCallback, errorCallback, options)
  • .cleanup()
  • .onError : function
  • .onSuccess : function
  • .CameraOptions : Object
• Camera
  • .DestinationType : enum
  • .EncodingType : enum
  • .MediaType : enum
  • .PictureSourceType : enum
  • .PopoverArrowDirection : enum
  • .Direction : enum
• CameraPopoverHandle
• CameraPopoverOptions

camera

camera.getPicture(successCallback, errorCallback, options)

Takes a photo using the camera, or retrieves a photo from the device's image gallery. The result is provided in the first parameter of the successCallback as a string.

As of v8.0.0, the result is formatted as URIs. The scheme will vary depending on settings and platform.

v7 and earlier versions, the return format is as follows:

For this reason, upgrading to v8 is strongly recommended as it greatly streamlines the return data.

The camera.getPicture function opens the device's default camera application that allows users to snap pictures by default - this behavior occurs, when Camera.sourceType equals Camera.PictureSourceType.CAMERA. Once the user snaps the photo, the camera application closes and the application is restored.

If Camera.sourceType is Camera.PictureSourceType.PHOTOLIBRARY or Camera.PictureSourceType.SAVEDPHOTOALBUM, then a dialog displays that allows users to select an existing image.

The return value is sent to the cameraSuccess callback function, in one of the following formats, depending on the specified cameraOptions. You can do whatever you want with content:

• Render the content in an <img> or <video> tag
• Copy the data to a persistent location
• Post the data to a remote server

NOTE: Photo resolution on newer devices is quite good. Photos selected from the device's gallery are not downscaled to a lower quality, even if a quality parameter is specified. To avoid common memory problems, set Camera.destinationType to FILE_URI rather than DATA_URL.

NOTE: To use saveToPhotoAlbum option on Android 9 (API 28) and lower, the WRITE_EXTERNAL_STORAGE permission must be declared.

To do this, add the following in your config.xml:

<config-file target="AndroidManifest.xml" parent="/*" xmlns:android="http://schemas.android.com/apk/res/android">
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" android:maxSdkVersion="28" />
</config-file>

Android 10 (API 29) and later devices does not require WRITE_EXTERNAL_STORAGE permission. If your application only supports Android 10 or later, then this step is not necessary.

FILE_URI Usage

When FILE_URI is used, the returned path is not directly usable. The file path needs to be resolved into a DOM-usable URL using the Cordova File Plugin.

Additionally, the file URIs returned is a temporary read access grant. The OS reserves the right to revoke permission to access the resource, which typically occurs after the app has been closed. For images captured using the camera, the image is stored in a temporary location which can be cleared at any time, usually after the app exits. It's the application's decision to decide how the content should be used depending on their use cases.

For persistent access to the content, the resource should be copied to your app's storage container. An example use case is an app allowing an user to select a profile picture from their gallery or camera. The application will need consistent access to that resource, so it's not suitable to retain the temporary access path. So the appplication should copy the resource to a persistent location.

For use cases that involve temporary use, it is valid and safe to use the temporary file path to display the content. An example of this could be an image editing application, rendering the data into a canvas.

NOTE: The returned schemes is an implementation detail. Do not assume that it will always be a file:// URI.

Supported Platforms

• Android
• Browser
• iOS

More examples here. Quirks here.

Kind: static method of [camera](#module_camera)

Example

navigator.camera.getPicture(cameraSuccess, cameraError, cameraOptions);

camera.cleanup()

Removes intermediate image files that are kept in temporary storage after calling camera.getPicture. Applies only when the value of Camera.sourceType equals Camera.PictureSourceType.CAMERA and the Camera.destinationType equals Camera.DestinationType.FILE_URI.

Supported Platforms

• iOS

Kind: static method of [camera](#module_camera)
Example

navigator.camera.cleanup(onSuccess, onFail);

function onSuccess() {
    console.log("Camera cleanup success.")
}

function onFail(message) {
    alert('Failed because: ' + message);
}

camera.onError : function

Callback function that provides an error message.

Kind: static typedef of [camera](#module_camera)

camera.onSuccess : function

Callback function that provides the image data.

Kind: static typedef of [camera](#module_camera)

Example

// Show image captured with FILE_URI
function cameraCallback(imageData) {
    window.resolveLocalFileSystemURL(uri, (entry) => {
        let image = document.getElementById('myImage');
        image.src = entry.toURL();
    }, onError);
}

// Show image captured with DATA_URL
function cameraCallback(imageData) {
   var image = document.getElementById('myImage');
   image.src = imageData;
}

camera.CameraOptions : Object

Optional parameters to customize the camera settings.

• Quirks

Kind: static typedef of [camera](#module_camera)
Properties

Camera

Camera.DestinationType : enum

Defines the output format of Camera.getPicture call.

Kind: static enum property of [Camera](#module_Camera)
Properties

Camera.EncodingType : enum

Kind: static enum property of [Camera](#module_Camera)
Properties

Camera.MediaType : enum

Kind: static enum property of [Camera](#module_Camera)
Properties

Camera.PictureSourceType : enum

Defines the output format of Camera.getPicture call.

Kind: static enum property of [Camera](#module_Camera)
Properties

Camera.PopoverArrowDirection : enum

Matches iOS UIPopoverArrowDirection constants to specify arrow location on popover.

Kind: static enum property of [Camera](#module_Camera)
Properties

Camera.Direction : enum

Kind: static enum property of [Camera](#module_Camera)
Properties

CameraPopoverOptions

iOS-only parameters that specify the anchor element location and arrow direction of the popover when selecting images from an iPad's library or album. Note that the size of the popover may change to adjust to the direction of the arrow and orientation of the screen. Make sure to account for orientation changes when specifying the anchor element location.

CameraPopoverHandle

A handle to an image picker popover.

Supported Platforms

• iOS

Example

navigator.camera.getPicture(onSuccess, onFail,
{
    destinationType: Camera.DestinationType.FILE_URI,
    sourceType: Camera.PictureSourceType.PHOTOLIBRARY,
    popoverOptions: new CameraPopoverOptions(300, 300, 100, 100, Camera.PopoverArrowDirection.ARROW_ANY, 300, 600)
});

// Reposition the popover if the orientation changes.
window.onorientationchange = function() {
    var cameraPopoverHandle = new CameraPopoverHandle();
    var cameraPopoverOptions = new CameraPopoverOptions(0, 0, 100, 100, Camera.PopoverArrowDirection.ARROW_ANY, 400, 500);
    cameraPopoverHandle.setPosition(cameraPopoverOptions);
}

camera.getPicture Errata

Example

Take a photo and retrieve the image's file location:

// Don't forget to install cordova-plugin-file for resolveLocalFileSystemURL!

navigator.camera.getPicture(onSuccess, onFail, { quality: 50,
    destinationType: Camera.DestinationType.FILE_URI });

function onSuccess(imageURI) {
    window.resolveLocalFileSystemURL(uri, (entry) => {
        let img = document.getElementById('image');
        img.src = entry.toURL();
    }, onFail);
}

function onFail(message) {
    alert('Failed because: ' + message);
}

Take a photo and retrieve it as a Base64-encoded image:

/**
 * Warning: Using DATA_URL is not recommended! The DATA_URL destination
 * type is very memory intensive, even with a low quality setting. Using it
 * can result in out of memory errors and application crashes. Use FILE_URI
 * instead.
 */
navigator.camera.getPicture(onSuccess, onFail, { quality: 25,
    destinationType: Camera.DestinationType.DATA_URL
});

function onSuccess(imageData) {
    var image = document.getElementById('myImage');
    image.src = imageData;
}

function onFail(message) {
    alert('Failed because: ' + message);
}

Preferences (iOS)

• CameraUsesGeolocation (boolean, defaults to false). For capturing JPEGs, set to true to get geolocation data in the EXIF header. This will trigger a request for geolocation permissions if set to true.

   <preference name="CameraUsesGeolocation" value="false" />
  

Android Quirks

Android uses intents to launch the camera activity on the device to capture images, and on phones with low memory, the Cordova activity may be killed. In this scenario, the result from the plugin call will be delivered via the resume event. See the Android Lifecycle guide for more information. The pendingResult.result value will contain the value that would be passed to the callbacks (either the URI/URL or an error message). Check the pendingResult.pluginStatus to determine whether or not the call was successful.

Browser Quirks

Can only return photos as data URI image.

iOS Quirks

Including a JavaScript alert() in either of the callback functions can cause problems. Wrap the alert within a setTimeout() to allow the iOS image picker or popover to fully close before the alert displays:

setTimeout(function() {
    // do your thing here!
}, 0);

CameraOptions Errata

Android Quirks

• Any cameraDirection value results in a back-facing photo. (= You can only use the back camera)

• allowEdit is unpredictable on Android and it should not be used! The Android implementation of this plugin tries to find and use an application on the user's device to do image cropping. The plugin has no control over what application the user selects to perform the image cropping and it is very possible that the user could choose an incompatible option and cause the plugin to fail. This sometimes works because most devices come with an application that handles cropping in a way that is compatible with this plugin (Google Photos), but it is unwise to rely on that being the case. If image editing is essential to your application, consider seeking a third party library or plugin that provides its own image editing utility for a more robust solution.

• Camera.PictureSourceType.PHOTOLIBRARY and Camera.PictureSourceType.SAVEDPHOTOALBUM both display the same photo album.

• Ignores the encodingType parameter if the image is unedited (i.e. quality is 100, correctOrientation is false, and no targetHeight or targetWidth are specified). The CAMERA source will always return the JPEG file given by the native camera and the PHOTOLIBRARY and SAVEDPHOTOALBUM sources will return the selected file in its existing encoding.

Sample: Take Pictures, Select Pictures from the Picture Library, and Get Thumbnails

The Camera plugin allows you to do things like open the device's Camera app and take a picture, or open the file picker and select one. The code snippets in this section demonstrate different tasks including:

• Open the Camera app and take a Picture
• Take a picture and return thumbnails (resized picture)
• Take a picture and generate a FileEntry object
• Select a file from the picture library
• Select a JPEG image and return thumbnails (resized image)
• Select an image and generate a FileEntry object

Take a Picture

Before you can take a picture, you need to set some Camera plugin options to pass into the Camera plugin's getPicture function. Here is a common set of recommendations. In this example, you create the object that you will use for the Camera options, and set the sourceType dynamically to support both the Camera app and the file picker.

function setOptions(srcType) {
    var options = {
        // Some common settings are 20, 50, and 100
        quality: 50,
        destinationType: Camera.DestinationType.FILE_URI,
        // In this app, dynamically set the picture source, Camera or photo gallery
        sourceType: srcType,
        encodingType: Camera.EncodingType.JPEG,
        mediaType: Camera.MediaType.PICTURE,
        allowEdit: true,
        correctOrientation: true
    }
    return options;
}

Typically, you want to use a FILE_URI instead of a DATA_URL to avoid most memory issues. JPEG is the recommended encoding type for Android.

You take a picture by passing in the options object to getPicture, which takes a CameraOptions object as the third argument. When you call setOptions, pass Camera.PictureSourceType.CAMERA as the picture source.

function openCamera(selection) {

    var srcType = Camera.PictureSourceType.CAMERA;
    var options = setOptions(srcType);
    var func = createNewFileEntry;

    navigator.camera.getPicture(function cameraSuccess(imageUri) {

        displayImage(imageUri);
        // You may choose to copy the picture, save it somewhere, or upload.
        func(imageUri);

    }, function cameraError(error) {
        console.debug("Unable to obtain picture: " + error, "app");

    }, options);
}

Once you take the picture, you can display it or do something else. In this example, call the app's displayImage function from the preceding code.

function displayImage(imgUri) {

    var elem = document.getElementById('imageFile');
    elem.src = imgUri;
}

Take a Picture and Return Thumbnails (Resize the Picture)

To get smaller images, you can return a resized image by passing both targetHeight and targetWidth values with your CameraOptions object. In this example, you resize the returned image to fit in a 100px by 100px box (the aspect ratio is maintained, so 100px is either the height or width, whichever is greater in the source).

function openCamera(selection) {

    var srcType = Camera.PictureSourceType.CAMERA;
    var options = setOptions(srcType);
    var func = createNewFileEntry;

    if (selection == "camera-thmb") {
        options.targetHeight = 100;
        options.targetWidth = 100;
    }

    navigator.camera.getPicture(function cameraSuccess(imageUri) {

        // Do something

    }, function cameraError(error) {
        console.debug("Unable to obtain picture: " + error, "app");

    }, options);
}

Select a File from the Picture Library

When selecting a file using the file picker, you also need to set the CameraOptions object. In this example, set the sourceType to Camera.PictureSourceType.SAVEDPHOTOALBUM. To open the file picker, call getPicture just as you did in the previous example, passing in the success and error callbacks along with CameraOptions object.

function openFilePicker(selection) {

    var srcType = Camera.PictureSourceType.SAVEDPHOTOALBUM;
    var options = setOptions(srcType);
    var func = createNewFileEntry;

    navigator.camera.getPicture(function cameraSuccess(imageUri) {

        // Do something

    }, function cameraError(error) {
        console.debug("Unable to obtain picture: " + error, "app");

    }, options);
}

Select an Image and Return Thumbnails (resized images)

Resizing a file selected with the file picker works just like resizing using the Camera app; set the targetHeight and targetWidth options.

function openFilePicker(selection) {

    var srcType = Camera.PictureSourceType.SAVEDPHOTOALBUM;
    var options = setOptions(srcType);
    var func = createNewFileEntry;

    if (selection == "picker-thmb") {
        // To downscale a selected image,
        // Camera.EncodingType (e.g., JPEG) must match the selected image type.
        options.targetHeight = 100;
        options.targetWidth = 100;
    }

    navigator.camera.getPicture(function cameraSuccess(imageUri) {

        // Do something with image

    }, function cameraError(error) {
        console.debug("Unable to obtain picture: " + error, "app");

    }, options);
}

Take a picture and get a FileEntry Object

If you want to do something like copy the image to another location, or upload it somewhere, an FileEntry is needed for the returned picture. To do this, call window.resolveLocalFileSystemURL on the file URI returned by the Camera app. If you need to use a FileEntry object, set the destinationType to Camera.DestinationType.FILE_URI in your CameraOptions object (this is also the default value).

NOTE: You need the File plugin to call window.resolveLocalFileSystemURL.

Here is the call to window.resolveLocalFileSystemURL. The image URI is passed to this function from the success callback of getPicture. The success handler of resolveLocalFileSystemURL receives the FileEntry object.

function getFileEntry(imgUri) {
    window.resolveLocalFileSystemURL(imgUri, function success(fileEntry) {

        // Example 1: Copy to app data directory
        window.resolveLocalFileSystemURL(cordova.file.dataDirectory, function (dataDirectoryEntry) {
            fileEntry.copyTo(dataDirectoryEntry, "profilePic", onSuccess, onError);
        }, onError);
        
        // Example 2: Upload it!
        fileEntry.file(function (file) {
            var reader = new FileReader();
            
            reader.onloadend = function() {
                var xhr = new XMLHttpRequest();
                xhr.open('POST', 'https://myserver.com/upload');
                xhr.onload = function () {
                    // All done!
                };
                xhr.send(this.result);
            };

            reader.readAsArrayBuffer(file);
        }, onError);
    }, onError);
}