#####Originally a fork of Google's CameraView library.

CameraKit is an extraordinarily easy to use utility to work with the infamous Android Camera and Camera2 APIs. Built by Dylan McIntyre.

Try out all the unique features using the CameraKit Demo from the Google Play store!

Table of Contents

• Features
• Setup
• Usage
  • Capturing Images
  • Capturing Video
• Extra Attributes
  • ckFacing
  • ckFlash
  • ckFocus
  • ckMethod
  • ckZoom
  • ckCropOutput
  • ckJpegQuality
• Automatic Permissions Behavior
• Dynamic Sizing Behavior
  • adjustViewBounds
• Events
• Credits
• License

Features

• Image and video capture seamlessly working with the same preview session.
• Automatic use of both Camera and Camera2 APIs.
• Automatic system permission handling.
• Automatic preview scaling.
  • Create a CameraView of any size (not just presets!).
  • Automatic output cropping to match your CameraView bounds.
• Multiple capture methods.
  • METHOD_STANDARD: an image captured normally using the camera APIs.
  • METHOD_STILL: a freeze frame of the CameraView preview (similar to SnapChat and Instagram) for devices with slower cameras.
  • METHOD_AUTO: automatic capture method determination based on measured speed.
• Built-in tap to focus and auto focus.
• Built-in pinch to zoom.

Setup

Add CameraKit to the dependencies block in your app level build.gradle:

compile 'com.flurgle:camerakit:1.0.0'

Usage

To use CameraKit, simply add a CameraView to your layout:

<com.flurgle.camerakit.CameraView
    android:id="@+id/camera"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:adjustViewBounds="true" />

Make sure you override onResume and onPause in your activity, and make calls respectively to CameraView.start() and CameraView.stop().

@Override
protected void onResume() {
    super.onResume();
    cameraView.start();
}

@Override
protected void onPause() {
    cameraView.stop();
    super.onPause();
}

Capturing Images

To capture an image just call CameraView.captureImage(). Make sure you setup a CameraListener to handle the image callback.

camera.setCameraListener(new CameraListener() {
    @Override
    public void onPictureTaken(byte[] picture) {
        super.onPictureTaken(picture);

        // Create a bitmap
        Bitmap result = BitmapFactory.decodeByteArray(picture, 0, picture.length);
    }
});

camera.captureImage();

Capturing Video

To capture video just call CameraView.startRecordingVideo() to start, and CameraView.stopRecordingVideo() to finish. Make sure you setup a CameraListener to handle the video callback.

camera.setCameraListener(new CameraListener() {
    @Override
    public void onVideoTaken(File video) {
        super.onVideoTaken(video);
        // The File parameter is an MP4 file.
    }
});

camera.startRecordingVideo();
camera.postDelayed(new Runnable() {
    @Override
    public void run() {
        camera.stopRecordingVideo();
    }
}, 2500);

Extra Attributes

<com.flurgle.camerakit.CameraView xmlns:camerakit="http://schemas.android.com/apk/res-auto"
    android:id="@+id/camera"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    camerakit:ckFacing="back"
    camerakit:ckFlash="off"
    camerakit:ckFocus="continuous"
    camerakit:ckMethod="standard"
    camerakit:ckZoom="pinch"
    camerakit:ckCropOutput="true"  
    camerakit:ckJpegQuality="100"
    android:adjustViewBounds="true" />

Attribute	Values
ckFacing	back front
ckFlash	off on auto
ckFocus	off continuous tap
ckMethod	standard still speed
ckZoom	off pinch
ckCropOutput	true false
ckJpegQuality	0 <= n <= 100

---

ckFacing

back front

back

cameraView.setFacing(CameraKit.Constants.FACING_BACK);

front

cameraView.setFacing(CameraKit.Constants.FACING_FRONT);

---

ckFlash

off on auto

off

cameraView.setFlash(CameraKit.Constants.FLASH_OFF);

on

cameraView.setFlash(CameraKit.Constants.FLASH_ON);

auto

cameraView.setFlash(CameraKit.Constants.FLASH_AUTO);

---

ckFocus

off continuous tap

off

cameraView.setFocus(CameraKit.Constants.FOCUS_OFF);

continuous

cameraView.setFocus(CameraKit.Constants.FOCUS_CONTINUOUS);

tap

cameraView.setFocus(CameraKit.Constants.FOCUS_TAP);

---

ckMethod

standard still speed

standard

cameraView.setMethod(CameraKit.Constants.METHOD_STANDARD);

When you use METHOD_STANDARD (camerakit:ckMethod="standard"), images will be captured using the normal camera API capture method using the shutter.

[Insert GIF]

still

cameraView.setMethod(CameraKit.Constants.METHOD_STILL);

When you use METHOD_STILL (camerakit:ckMethod="still"), images will be captured by grabbing a single frame from the preview. This behavior is the same as SnapChat and Instagram. This method has a higher rate of motion blur but can be a better experience for users with slower cameras.

[Insert GIF]

speed

cameraView.setMethod(CameraKit.Constants.METHOD_SPEED);

When you use METHOD_SPEED (camerakit:ckMethod="speed"), images will be first be captured using the standard method. If capture consistently takes a long amount of time, the picture mode will fallback to still capture.

[Insert GIF]

---

ckZoom

off pinch

off

cameraView.setZoom(CameraKit.Constants.ZOOM_OFF);

pinch

cameraView.setZoom(CameraKit.Constants.ZOOM_PINCH);

---

ckCropOutput

true false

true

cameraView.setCropOutput(true);

false

cameraView.setCropOutput(false);

---

ckJpegQuality

cameraView.setJpegQuality(100);

---

Automatic Permissions Behavior

You can handle permissions yourself in whatever way you want, but if you make a call to CameraView.start() without the android.permission.CAMERA permission, an exception would normally be thrown and your app would crash.

With CameraKit, we will automatically prompt for the android.permission.CAMERA permission if it's not available. If you want to handle it yourself, just make sure you don't call CameraView.start() until you acquire the permissions.

Dynamic Sizing Behavior

You can setup the CameraView dimensions however you want. When your dimensions don't match the aspect ratio of the internal preview surface, the surface will be cropped minimally to fill the view. The behavior is the same as the android:scaleType="centerCrop" on an ImageView.

adjustViewBounds

You can use a mix of a fixed dimension (a set value or match_parent) as well as wrap_content. When you do this make sure you set android:adjustViewBounds="true" on the CameraView.

When you do this the dimension set to wrap_content will automatically align with the true aspect ratio of the preview surface. In this case the whole preview will be visible with no cropping.

Events

Make sure you can react to different camera events by setting up a CameraListener instance.

camera.setCameraListener(new CameraListener() {

    @Override
    public void onCameraOpened() {
        super.onCameraOpened();
    }

    @Override
    public void onCameraClosed() {
        super.onCameraClosed();
    }

    @Override
    public void onPictureTaken(byte[] picture) {
        super.onPictureTaken(picture);
    }

    @Override
    public void onVideoTaken(File video) {
        super.onVideoTaken(video);
    }

});

Credits

Dylan McIntyre

License

CameraKit-Android is MIT licensed.