ValiFi

• ValiFi is android library for validating fields or whole forms.
• It's working with data binding and validations are visible immediately when user adds input.
• It's highly customizable and simple for use.
• works with kotlin

Features

• predefined fields (password, email, username, ..)
• forms for lots of fields
• custom and asynchronous validations
• option for own fields

How to use

Initialize the library

1. Add gradle dependency

implementation 'com.mlykotom:valifi:1.5.0'

2. Setup project with data binding

android{
    ...
    dataBinding.enabled = true
    ...
}

3. Install the library in application class

public class MyApplication extends Application {
    @Override
    public void onCreate() {
        ValiFi.install(this);
    }
}

Use in your code

1. Create field you want to validate

public final ValiFieldEmail email = new ValiFieldEmail();

2. Use it from layout

Library uses two-way data binding so be careful of adding android:text="@={...}"

<android.support.design.widget.TextInputLayout
    ...
    app:errorEnabled="true"
    app:error="@{viewModel.email.error}">

    <android.support.design.widget.TextInputEditText
        ... 
        android:text="@={viewModel.email.value}"
        android:hint="E-mail address" />
</android.support.design.widget.TextInputLayout>

...

<Button
    ...
    android:enabled="@{viewModel.email.valid}"
    android:text="Submit" />

3. Destroy the field

In order to prevent leaks, field must be destroyed before destroying the screen!

This is easily done by calling:

@Override
public void onDestroy() {
 email.destroy();
 super.onDestroy();
}

That's it!

When user types his e-mail, it will automatically validates input and enables/disables submit button.

For customizations information visit Wiki

App Examples

1. MVVM approach (preferred) here
2. Classic fragment approach here
3. [deprecated + removed] MVVM approach here

License

Copyright 2018 Tomas Mlynaric

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.