How to access private final fields in a private static final inner class via reflection

MyApplication.java

public class MyApplication extends Application {
  
  ...
  
  @SuppressWarnings({"unchecked", "ConstantConditions"})
  private void handleDownloadManagerCrash(Thread thread, Throwable throwable) {
    ArrayList<Download> downloads = null;
    HashMap activeTasks = null;

    try {
      Field innerClassField = mDownloadManager.getClass().getDeclaredField("internalHandler");
      innerClassField.setAccessible(true);
      Object internalHandler = innerClassField.get(mDownloadManager);
      Field activeTasksField = internalHandler.getClass().getDeclaredField("activeTasks");
      Field downloadsField = internalHandler.getClass().getDeclaredField("downloads");

      activeTasksField.setAccessible(true);
      downloadsField.setAccessible(true);

      activeTasks = (HashMap) activeTasksField.get(internalHandler);
      downloads = (ArrayList) downloadsField.get(internalHandler);
    } catch (IllegalAccessException | IllegalArgumentException | NoSuchFieldException | NullPointerException | SecurityException e) {
      // Failed
    }

    Log.d("TAG", String.format("Handled crash, fields are -> downloads=[%s], activeTasks=[%s]", 
                                   downloads, activeTasks));
  }
}