Java CameraSource.Builder方法代碼示例

import com.google.android.gms.vision.CameraSource; //導入方法依賴的package包/類
public void createCameraSource() {
    //Setup the BarCodeDetector
    Context context = getApplicationContext();
    BarcodeDetector detector = new BarcodeDetector.Builder(context)
        .build();

    //note the barcodeTrackerFactory is defined below and is very simple.
    detector.setProcessor(new MultiProcessor.Builder<>(new BarcodeTrackFactory()).build());

    if (!detector.isOperational()) {
        // Note: The first time that an app using face API is installed on a device, GMS will
        // download a native library to the device in order to do detection.  Usually this
        // completes before the app is run for the first time.  But if that download has not yet
        // completed, then the above call will not detect any faces.
        //
        // isOperational() can be used to check if the required native library is currently
        // available.  The detector will automatically become operational once the library
        // download completes on device.
        Log.w(TAG, "Face detector dependencies are not yet available.");
    }

    // Creates and starts the camera.  Note that this uses a higher resolution in comparison
    // to other detection examples to enable the barcode detector to detect small barcodes
    // at long distances.
    CameraSource.Builder builder = new CameraSource.Builder(getApplicationContext(), detector)
        .setFacing(CameraSource.CAMERA_FACING_BACK)
        .setRequestedPreviewSize(1600, 1024)
        .setRequestedFps(15.0f);

    builder = builder.setAutoFocusEnabled(true);

    mCameraSource = builder.build();
}
 

import com.google.android.gms.vision.CameraSource; //導入方法依賴的package包/類
private void createCameraSource() {

        Context context = getActivity().getApplicationContext();

        int code = GoogleApiAvailability.getInstance().isGooglePlayServicesAvailable(
                getActivity());
        if (code != ConnectionResult.SUCCESS) {
            GoogleApiAvailability.getInstance().getErrorDialog(getActivity(), code, 100).show();
        } else {

            // A barcode detector is created to track barcodes.  An associated multi-processor instance
            // is set to receive the barcode detection results, track the barcodes, and maintain
            // graphics for each barcode on screen.  The factory is used by the multi-processor to
            // create a separate tracker instance for each barcode.
            BarcodeDetector barcodeDetector = new BarcodeDetector.Builder(context).build();
            processor = new PandroidScannerView.SimpleProcessor() {

                @Override
                public boolean handleBarcode(Barcode barcode) {
                    toastManager.makeToast(getActivity(), "Detected: " + barcode.displayValue, new ToastManager.ToastListener() {
                        @Override
                        public void onDismiss() {
                            processor.resumeDetector();
                        }

                        @Override
                        public void onActionClicked() {

                        }
                    });
                    return true;
                }
            };
            barcodeDetector.setProcessor(processor);

            if (!barcodeDetector.isOperational()) {
                // Note: The first time that an app using the barcode or face API is installed on a
                // device, GMS will download a native libraries to the device in order to do detection.
                // Usually this completes before the app is run for the first time.  But if that
                // download has not yet completed, then the above call will not detect any barcodes
                // and/or faces.
                //
                // isOperational() can be used to check if the required native libraries are currently
                // available.  The detectors will automatically become operational once the library
                // downloads complete on device.
                Log.w(TAG, "Detector dependencies are not yet available.");
            }

            // Creates and starts the camera.  Note that this uses a higher resolution in comparison
            // to other detection examples to enable the barcode detector to detect small barcodes
            // at long distances.
            CameraSource.Builder builder = new CameraSource.Builder(context, barcodeDetector)
                    .setFacing(CameraSource.CAMERA_FACING_BACK)
                    .setRequestedPreviewSize(1600, 1024)
                    .setRequestedFps(30.0f)
                    .setAutoFocusEnabled(true);

            mCameraSource = builder.build();
        }

    }