Camera2 APIを使ったカメラ機能の実装|Android開発

<uses-permission android:name="android.permission.CAMERA"></uses-permission>

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
             xmlns:tools="http://schemas.android.com/tools"
             android:layout_width="match_parent"
             android:layout_height="match_parent">

    <TextureView
        android:id="@+id/camera2_texture"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:visibility="visible" />

</FrameLayout>

mTextureView.isAvailable();

mTextureView.setSurfaceTextureListener(mSurfaceTextureListener);

TextureView.SurfaceTextureListener mSurfaceTextureListener =
    new TextureView.SurfaceTextureListener() {...};

CameraManager cameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);

ImageReader mImageReader = ImageReader.newInstance(1920, 1080, ImageFormat.JPEG, 3);
mImageReader.setOnImageAvailableListener(mTakePictureAvailableListener, null);

cameraManager.openCamera(cameraId, mStateCallback, null);

CameraDevice.StateCallback mStateCallback =
    new CameraDevice.StateCallback() {...};

SurfaceTexture texture = mTextureView.getSurfaceTexture();
texture.setDefaultBufferSize(1280, 720);
Surface mPreviewSurface = new Surface(texture);

camera.createCaptureSession(Arrays.asList(mPreviewSurface,
                                       mImageReader.getSurface()),
                           mSessionCallback,
                           null);

CameraCaptureSession.StateCallback mSessionCallback =
    new CameraCaptureSession.StateCallback() {...};

mCameraDevice = camera;

mCaptureSession = session;

CaptureRequest.Builder captureBuilder =
    mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);

captureBuilder.addTarget(mPreviewSurface);

captureBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);

captureSession.setRepeatingRequest(captureBuilder.build(), null, null);

CaptureRequest.Builder captureBuilder =
    camera.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE);

captureBuilder.addTarget(mImageReader.getSurface());

captureBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, orientation);
captureBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_ON);

captureSession.stopRepeating();

captureSession.capture(captureBuilder.build(), mCaptureCallback, null);

CameraCaptureSession.CaptureCallback mCaptureCallback =
    new CameraCaptureSession.CaptureCallback() {...};

ImageReader.OnImageAvailableListener mTakePictureAvailableListener =
    new ImageReader.OnImageAvailableListener() {...};

Image image = reader.acquireNextImage();

Image image = reader.acquireLatestImage();

image.close();

mCaptureSession.close();

mCameraDevice.close();

mImageReader.close();