Example usage for android.hardware.camera2 CameraCaptureSession capture

Introduction

In this page you can find the example usage for android.hardware.camera2 CameraCaptureSession capture.

Prototype

public abstract int capture(@NonNull CaptureRequest request, @Nullable CaptureCallback listener,
        @Nullable Handler handler) throws CameraAccessException;

Source Link

Document

Submit a request for an image to be captured by the camera device.

The request defines all the parameters for capturing the single image, including sensor, lens, flash, and post-processing settings.

Each request will produce one CaptureResult and produce new frames for one or more target Surfaces, set with the CaptureRequest builder's CaptureRequest.Builder#addTarget method.

Usage

From source file:MainActivity.java

protected void takePicture(View view) {
    if (null == mCameraDevice) {
        return;//from   w w w  .  j  a  v a2s  .c  o  m
    }
    CameraManager manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
    try {
        CameraCharacteristics characteristics = manager.getCameraCharacteristics(mCameraDevice.getId());
        StreamConfigurationMap configurationMap = characteristics
                .get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
        if (configurationMap == null)
            return;
        Size largest = Collections.max(Arrays.asList(configurationMap.getOutputSizes(ImageFormat.JPEG)),
                new CompareSizesByArea());
        ImageReader reader = ImageReader.newInstance(largest.getWidth(), largest.getHeight(), ImageFormat.JPEG,
                1);
        List<Surface> outputSurfaces = new ArrayList<Surface>(2);
        outputSurfaces.add(reader.getSurface());
        outputSurfaces.add(new Surface(mTextureView.getSurfaceTexture()));
        final CaptureRequest.Builder captureBuilder = mCameraDevice
                .createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE);
        captureBuilder.addTarget(reader.getSurface());
        captureBuilder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_AUTO);
        ImageReader.OnImageAvailableListener readerListener = new ImageReader.OnImageAvailableListener() {
            @Override
            public void onImageAvailable(ImageReader reader) {
                Image image = null;
                try {
                    image = reader.acquireLatestImage();
                    ByteBuffer buffer = image.getPlanes()[0].getBuffer();
                    byte[] bytes = new byte[buffer.capacity()];
                    buffer.get(bytes);
                    OutputStream output = new FileOutputStream(getPictureFile());
                    output.write(bytes);
                    output.close();
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } finally {
                    if (image != null) {
                        image.close();
                    }
                }
            }
        };
        HandlerThread thread = new HandlerThread("CameraPicture");
        thread.start();
        final Handler backgroudHandler = new Handler(thread.getLooper());
        reader.setOnImageAvailableListener(readerListener, backgroudHandler);
        final CameraCaptureSession.CaptureCallback captureCallback = new CameraCaptureSession.CaptureCallback() {
            @Override
            public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request,
                    TotalCaptureResult result) {
                super.onCaptureCompleted(session, request, result);
                Toast.makeText(MainActivity.this, "Picture Saved", Toast.LENGTH_SHORT).show();
                startPreview(session);
            }
        };
        mCameraDevice.createCaptureSession(outputSurfaces, new CameraCaptureSession.StateCallback() {
            @Override
            public void onConfigured(CameraCaptureSession session) {
                try {
                    session.capture(captureBuilder.build(), captureCallback, backgroudHandler);
                } catch (CameraAccessException e) {
                    e.printStackTrace();
                }
            }

            @Override
            public void onConfigureFailed(CameraCaptureSession session) {
            }
        }, backgroudHandler);
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}

---