要使用registerForActivityResult和ActivityResultCallback获取完整的照片，需要使用以下代码：

private static final int REQUEST_IMAGE_CAPTURE = 1;
private ActivityResultLauncher takePictureLauncher =
        registerForActivityResult(new ActivityResultContracts.TakePicture(), result -> {
            if (result) {
                // do something with the full size image saved to the selected file
            }
        });

private String currentPhotoPath;

private File createImageFile() throws IOException {
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date());
    String imageFileName = "JPEG_" + timeStamp + "_";
    File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
    File image = File.createTempFile(
            imageFileName,  /* prefix */
            ".jpg",         /* suffix */
            storageDir      /* directory */
    );

    currentPhotoPath = image.getAbsolutePath();
    return image;
}

private void dispatchTakePictureIntent() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    // Ensure that there's a camera activity to handle the intent
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
        // Create the File where the photo should go
        File photoFile = null;
        try {
            photoFile = createImageFile();
        } catch (IOException ex) {
            // Error occurred while creating the File
            ex.printStackTrace();
        }
        // Continue only if the File was successfully created
        if (photoFile != null) {
            Uri photoURI = FileProvider.getUriForFile(this,
                    "com.example.android.fileprovider",
                    photoFile);
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
            takePictureLauncher.launch(photoURI);
        }
    }
}

调用dispatchTakePictureIntent()方法启动照相机，并使用ActivityResultCallback收到拍摄结果。返回的结果将为true或false，具体取决于启动的照片应用程序的操作。如果照片已成功保存并返回，则将在代码中做些事情，例如将其显示在ImageView中。在此示例中，使用createImageFile()方法创建一个临时文件并将其传递给takePictureLauncher。默认情况下，照片应保存在大于或等于最低相机分辨率的分辨率下。这基本上意味着照片的尺寸可能小于设备屏幕的尺寸，但可以根据需要放大。