Example usage for android.media ImageReader acquireLatestImage

Introduction

In this page you can find the example usage for android.media ImageReader acquireLatestImage.

Prototype

public Image acquireLatestImage() 

Source Link

Document

Acquire the latest Image from the ImageReader's queue, dropping older Image images .

Usage

From source file:com.sien.cpshoot.screencapture.ScreenCaptureFragment.java

private void saveImage(ImageReader mImageReader, int mWidth, int mHeight) {
    if (mImageReader == null)
        return;//from w  ww .  j  a v a 2s  .c  o m

    Image image = mImageReader.acquireLatestImage();
    if (image == null)
        return;
    final Image.Plane[] planes = image.getPlanes();
    if (planes.length <= 0)
        return;

    final ByteBuffer buffer = planes[0].getBuffer();
    int offset = 0;
    int pixelStride = planes[0].getPixelStride();
    int rowStride = planes[0].getRowStride();
    int rowPadding = rowStride - pixelStride * mWidth;
    Bitmap bitmap = Bitmap.createBitmap(mWidth + rowPadding / pixelStride, mHeight, Bitmap.Config.RGB_565);
    bitmap.copyPixelsFromBuffer(buffer);
    image.close();

    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy_MM_dd_hh_mm_ss");
    String strDate = dateFormat.format(new java.util.Date());
    String pathImage = Environment.getExternalStorageDirectory().getPath() + "/Pictures/";
    String nameImage = pathImage + strDate + ".png";
    if (bitmap != null) {
        try {
            File fileImage = new File(nameImage);
            if (!fileImage.exists()) {
                fileImage.createNewFile();
            }
            FileOutputStream out = new FileOutputStream(fileImage);
            if (out != null) {
                bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
                out.flush();
                out.close();
                Toast.makeText(getActivity(), "get phone's screen succeed", Toast.LENGTH_SHORT).show();
                Intent media = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
                Uri contentUri = Uri.fromFile(fileImage);
                media.setData(contentUri);
                getActivity().sendBroadcast(media);

                //
                beginCrop(Uri.fromFile(new File(nameImage)));
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

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From source file:MainActivity.java

protected void takePicture(View view) {
    if (null == mCameraDevice) {
        return;/*from w w  w.j ava2  s  .c  om*/
    }
    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();
    }
}

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