PhotoFragment.java 文件源码

private void configureCamera() {
    final Camera.Parameters parameters = camera.getParameters();
    try {
        parameters.setPreviewFormat(ImageFormat.NV21);

        // set focus for video if present
        List<String> focusModes = parameters.getSupportedFocusModes();

        if (null != focusModes && focusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) {
            parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
        }

        // check if torch is present
        List<String> flashModes = parameters.getSupportedFlashModes();

        cameraFlashIsSupported = null != flashModes && flashModes.contains(Camera.Parameters.FLASH_MODE_TORCH);

        final Camera.Size bestPreviewSize = getBestPreviewSize();
        photoProcessor.setPreviewSize(bestPreviewSize.width, bestPreviewSize.height);
        parameters.setPreviewSize(bestPreviewSize.width, bestPreviewSize.height);
        camera.setParameters(parameters);
    } catch (RuntimeException exception) {
        Toast.makeText(getContext(), R.string.camera_configuration_failed, Toast.LENGTH_SHORT).show();
    }
}