com.codename1.capture

Class Capture

java.lang.Object

com.codename1.capture.Capture

public class Capture
extends Object

Capture can "capture" media files from the device e.g. record audio, video and snap photos. Notice that files returned by this class are potentially temporary files and might be deleted by the OS in the future.
The code below demonstrates the capturing of a photo thru this API:

The code below demonstrates capturing and playing back audio files using this API:

Author:

Chen

Constructor Summary

Constructors

Constructor and Description
Capture()

Method Summary

Modifier and Type	Method and Description
static String	captureAudio() Capture the audio, blocking version that holds the EDT; alternatively you can use the Media API.
static void	captureAudio(ActionListener response) This method tries to invoke the device native hardware to capture audio.
static String	captureAudio(MediaRecorderBuilder recordingOptions) Capture the audio, blocking version that holds the EDT; alternatively you can use the Media API.
static void	captureAudio(MediaRecorderBuilder recorderOptions, ActionListener response) This method tries to invoke the device native hardware to capture audio.
static String	capturePhoto() Invokes the camera and takes a photo synchronously while blocking the EDT
static void	capturePhoto(ActionListener response) This method tries to invoke the device native camera to capture images.
static String	capturePhoto(int width, int height) Invokes the camera and takes a photo synchronously while blocking the EDT, the sample below demonstrates a simple usage and applying a mask to the result
static String	captureVideo() Same as captureVideo only a blocking version that holds the EDT
static void	captureVideo(ActionListener response) This method tries to invoke the device native camera to capture video.
static String	captureVideo(VideoCaptureConstraints constraints) Same as captureVideo(com.codename1.capture.VideoCaptureConstraints, com.codename1.ui.events.ActionListener) only a blocking version that holds the EDT.
static void	captureVideo(VideoCaptureConstraints constraints, ActionListener response) Captures video with some constraints, like width, height, and max length.
static boolean	hasCamera() Returns true if the device has camera false otherwise.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Capture

public Capture()

Method Detail

hasCamera

public static boolean hasCamera()

Returns true if the device has camera false otherwise.

Returns:

true if the device has a camera

capturePhoto

public static void capturePhoto(ActionListener response)

This method tries to invoke the device native camera to capture images. The method returns immediately and the response will be sent asynchronously to the given ActionListener Object The image is saved as a jpeg to a file on the device. use this in the actionPerformed to retrieve the file path String path = (String) evt.getSource(); if evt returns null the image capture was canceled by the user.

Parameters:

response - a callback Object to retrieve the file path

Throws:

RuntimeException - if this feature failed or unsupported on the platform

capturePhoto

public static String capturePhoto()

Invokes the camera and takes a photo synchronously while blocking the EDT

Returns:

the photo file location or null if the user canceled

captureAudio

public static String captureAudio()

Capture the audio, blocking version that holds the EDT; alternatively you can use the Media API.

Returns:

the audio file location or null if the user canceled

captureAudio

public static String captureAudio(MediaRecorderBuilder recordingOptions)

Capture the audio, blocking version that holds the EDT; alternatively you can use the Media API.

Returns:

the audio file location or null if the user canceled

Since:

7.0

captureVideo

public static String captureVideo()

Same as captureVideo only a blocking version that holds the EDT

Returns:

the photo file location or null if the user canceled

captureVideo

public static String captureVideo(VideoCaptureConstraints constraints)

Same as captureVideo(com.codename1.capture.VideoCaptureConstraints, com.codename1.ui.events.ActionListener) only a blocking version that holds the EDT.

Parameters:

constraints -

Returns:

A video file location or null if the user canceled.

Since:

7.0

capturePhoto

public static String capturePhoto(int width,
                                  int height)

Invokes the camera and takes a photo synchronously while blocking the EDT, the sample below demonstrates a simple usage and applying a mask to the result

Parameters:

width - the target width for the image if possible, some platforms don't support scaling. To maintain aspect ratio set to -1

height - the target height for the image if possible, some platforms don't support scaling. To maintain aspect ratio set to -1

Returns:

the photo file location or null if the user canceled

captureAudio

public static void captureAudio(ActionListener response)

This method tries to invoke the device native hardware to capture audio. The method returns immediately and the response will be sent asynchronously to the given ActionListener Object The audio is saved to a file on the device. use this in the actionPerformed to retrieve the file path String path = (String) evt.getSource();

Parameters:

response - a callback Object to retrieve the file path

Throws:

RuntimeException - if this feature failed or unsupported on the platform

captureAudio

public static void captureAudio(MediaRecorderBuilder recorderOptions,
                                ActionListener response)

This method tries to invoke the device native hardware to capture audio. The method returns immediately and the response will be sent asynchronously to the given ActionListener Object The audio record settings are specified in the recorderOptions parameter.

use this in the actionPerformed to retrieve the file path. String path = (String) evt.getSource();

Parameters:

response - a callback Object to retrieve the file path

Throws:

RuntimeException - if this feature failed or unsupported on the platform

Since:

7.0

captureVideo

public static void captureVideo(VideoCaptureConstraints constraints,
                                ActionListener response)

Captures video with some constraints, like width, height, and max length. Video constraints may not be supported on all platforms. Use VideoCaptureConstraints.isSupported() and VideoCaptureConstraints.isSizeSupported() to check whether constraints are supported on the current platform. If constraints are not supported, then, in the worst case, this will fall back to just use captureVideo(com.codename1.ui.events.ActionListener), i.e. capture with no constraints.

Parameters:

constraints - The constraints to use for the video capture.

response - a callback Object to retrieve the file path

Since:

7.0

captureVideo

public static void captureVideo(ActionListener response)

This method tries to invoke the device native camera to capture video. The method returns immediately and the response will be sent asynchronously to the given ActionListener Object The video is saved to a file on the device. use this in the actionPerformed to retrieve the file path String path = (String) evt.getSource();

Parameters:

response - a callback Object to retrieve the file path

Throws:

RuntimeException - if this feature failed or unsupported on the platform

See Also:

captureVideo(com.codename1.capture.VideoCaptureConstraints, com.codename1.ui.events.ActionListener)