CameraHandler.java 文件源码

/**
 * Initialize the camera device
 */
public void initializeCamera(Context context,
                             Handler backgroundHandler,
                             ImageReader.OnImageAvailableListener imageAvailableListener) {
    // Discover the camera instance
    CameraManager manager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
    String[] camIds = {};
    try {
        camIds = manager.getCameraIdList();
    } catch (CameraAccessException e) {
        Log.d(TAG, "Cam access exception getting IDs", e);
    }
    if (camIds.length < 1) {
        Log.d(TAG, "No cameras found");
        return;
    }
    String id = camIds[0];
    Log.d(TAG, "Using camera id " + id);
    // Initialize the image processor
    mImageReader = ImageReader.newInstance(IMAGE_WIDTH, IMAGE_HEIGHT,
            ImageFormat.JPEG, MAX_IMAGES);
    mImageReader.setOnImageAvailableListener(
            imageAvailableListener, backgroundHandler);
    // Open the camera resource
    try {
        manager.openCamera(id, mStateCallback, backgroundHandler);
    } catch (CameraAccessException cae) {
        Log.d(TAG, "Camera access exception", cae);
    }
}