从相机意图中删除记录

Question

当用户点击十字标志时，如何从相机意图中删除照片。我开发了一个应用程序，其中刻度标志将照片保存到文件中，十字标志也将照片保存到文件中。如何删除该照片？请帮助me.Below是我到目前为止所做的代码。

public void Photo(View view) {
        Intent intent = new Intent();
        intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
        File photoFile = null;


        try {
            photoFile = createImageFile();
        } catch (IOException e) {
            e.printStackTrace();
        }



        intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));

        startActivityForResult(intent, ACTIVITY_START_CAMERA_APP);

    }

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == ACTIVITY_START_CAMERA_APP && resultCode == RESULT_OK) {

            saveJson();
        }
        else if(requestCode==ACTIVITY_START_CAMERA_APP&&resultCode==RESULT_CANCELED){
           //delete
        }
    }


    File createImageFile() throws IOException {
        File storageDirectory = Environment.getExternalStoragePublicDirectory("GeoPark");
        File myDir = new File(storageDirectory, FILENAME1);
        if (myDir.isDirectory()) {
            String[] children = myDir.list();
            for (int i = 0; i < children.length; i++) {
                new File(myDir, children[i]).delete();
            }
        }
        else{
            myDir.mkdirs();


        }
        File file = new File(myDir, timestamp);
        return file;

    }