AddContacts | 这是一个将本地excel表格中联系人批量导入系统通讯录的代码。

Hey guys so I am new to OOP and trying to make my first OOP program. But then I encountered a problem. I don't know why the values hasn't changed even though I put a variable on the parameter of the constructor.

Here is my code:

My Json response status code is 200 and the object is also created but when I try to bind it with UI in ListView it doesn't show anything. I have also parsed created the model from the json data.

Here's my API_manager.dart file:

At the moment Room is working well with a DB to UI integration:

Dao for DB operations

Repository for interacting with the Daos and caching data into memory

ViewModel to abstract the Repository and link to UI lifecycle

However, another scenario comes up which I am having a hard time understanding how to properly implement Room usage.

I have a network API that is purely static and constructed as a reflection of the servers' REST architecture.

There is a parser method that walks through the URL structure and translates it to the existing API via reflection and invokes any final method that he finds.

In this API each REST operation is represented by a method under the equivalent REST naming structure class, i.e.:

/contacts in REST equates to Class Contacts.java in API

POST, GET, DELETE in rest equates to methods in the respective class

example:

I read following two questions but none of these are solution to my problem:

1. Firebase Phone Auth not working in release build

2. Firebase Authentication not working in Signed APK

Solution mentioned in both of these questions says that I need to copy SHA-1 from Play console and place it in Firebase console SHA-1 for my app. Problem is My app is not on play store, I just signed it and build the apks as we normally do for apk.relase. And I also updated firebase_auth and firebase_core dependencies to latest version.

Below is my code for phone auth:

The application I am trying to Build must have a spinner that dynamically changes items of a recyclerView. At the moment, when spinner item is changed, nothing happens but when I open another activity then come back, the data is then changed How can I make the data change at the moment the spinner selected item is changed. below is my code

Hi im trying to insert my the image data from firebase storage into my database however all the idea i have didn't work by the way in using Floor for my database any suggestion or idea will be well appreciated.

Here is my code for get the image from firebase Storage the image to database

I'm doing a challenge where I need to create simple functionality for a mobile phone. The program should:

1. Print a list of contacts
2. Add a new contact
3. Modify an existing contact
4. Remove a contact
5. Allow the user to search for a contact
6. Allow the user to quit the program.

The only part that isn't working for me is adding a new contact. I believe the problem is in the Mobile Phone class within the addContacts() method. When I call contacts.addName(scanner.nextLine()); and contacts.addPhoneNumber(scanner.nextLine()); the value that is being typed into the keyboard is for some reason not being added to the "names" Array List and the "phoneNumber" Array List which I initialized in the Contacts class. The code runs and prompts the user to enter the name and phone number of the contact to be added. However, when the user asks for the list of the contacts the program always prints "zero names and zero phone numbers." Even if the users just added a new contact with name and phone number. I would really appreciate any help, here is my code.

Main Class:

I'm using flutter_auth package to apply Phone Auth. Normally it sends the OTP when a new phone number is registered. But it is sending OTP again and again although the user's phone number is there in Firebase authentication list

One more thing is it is working fine on few devices, the normal way. Is there any thing wrong with syncing issue? means does it take some time to get sync with firestore or not?

Here's my code of phone auth What am I doing wrong?

I tried all the possible solutions like importing HttpClientModule in app.module.ts and all the suggestions given when I searched for this error message, but nothing solves my issues. Did I miss any settings in .ts files.