custom-camera-android

We can make custom camera using Camera and Camera2 API. CustomCamera project make using camera API while Camera2demo make using Camera2 API. Camera class, which has been deprecated. We recommend using the newer class Camera2, which works on Android 5.0 (API level 21) or greater.

Manifest declarations

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-feature android:name="android.hardware.camera" />

Camera API:

To access the primary camera,Use Camera.open(cameraType) method. Here cameraType=0 for back camera of 1 for front camera.

A CameraPreview class is a SurfaceView that can display the live image data coming from a camera, so users can frame and capture a picture or video.This class implements SurfaceHolder.Callback in order to capture the callback events for creating and destroying the view.

Capturing pictures

In order to capturing Image Camera.takePicture() method is use. In order to receive data in a JPEG format, you must implement an Camera.PictureCallback interface to receive the image data and write it to a file.

Capturing videos

For capturing video follow same step for showing preview. Use MediaRecorder class to record video. VideoCapturing Activity contain video capturing code.

Camera2 API:

Create a custom TextureView class AutoFitTextureView and add it to the layout. The purpose of the custom TextureView is to be able to draw itself according to an aspect ratio.

Implement a TextureView.SurfaceTextureListener on your TextureView, and override its onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int width, int height) method to calculate the matrix to apply to the TextureView so the camera output fits. Also override onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) for open camera.

Implement a CameraDevice.StateCallback to receive events about changes of the state of the camera device. Get CameraManger object and set necessary Properties of camera.

manager.openCamera(cameraId, stateCallback, null)

In CameraDevice.StateCallback override method onOpened(CameraDevice camera) and start camera preview.

Capturing pictures

Method takePicture() is use for capture image. Use setOnImageAvailableListener for getting image available call back.

Capturing videos

Use MediaRecorder class to record video. Set up a CaptureRequest.Builder using createCaptureRequest(CameraDevice.TEMPLATE_RECORD) on your CameraDevice instance. Use start() and stop() methods on your MediaRecorder instance to actually start and stop the recording. RecordVideo Activity contain code for capturing video.

CaptureWithVideo Activity show simultaneously capture Image and video. In which Image will capture while video is record.