[Solved] How to get all rows stored in the `room` library using `Async Task`?

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If you are looking forward to get previous data, the following Codelab might help you. But this really depends on your implementation.

How to get previous stored data without using LiveData ?
How to get all rows stored in the room library using Async Task?

Explanation:

In Your Dao include the following code:

  @Query("SELECT * FROM user")
    List<CustomObject> getAll();

In your Repository class include this snippet:

 public List<CustomObject> getAll() throws ExecutionException, InterruptedException {
    return new getAllAsyncTask(mCustomObjectDao).execute().get();
}

private static class getAllAsyncTask extends android.os.AsyncTask<Void, Void, List<CustomObject>> {

    private CustomObjectDao mAsyncTaskDao;
    List<CustomObject> a;

    getAllAsyncTask(CustomObjectDao dao) {
        mAsyncTaskDao = dao;
    }

    @Override
    protected List<CustomObject> doInBackground(Void... voids) {
        return mAsyncTaskDao.getAll();
    }
}

solved How to get all rows stored in the `room` library using `Async Task`?