Streamlining Data Validation with Data-Binding-Validator Library

In the realm of Android development, ensuring the accuracy and validity of data is a cornerstone for building reliable applications. The open-source project, Data-Binding-Validator, presented by Ilhasoft, emerges as a robust solution for verifying data-bound information within Android applications. Crafted with the elegance of Kotlin, this library embodies simplicity and ease of use.

Here's a glimpse into the core features of Data-Binding-Validator:

1. It facilitates validation checks on data-bound elements for attributes like minimum length, maximum length, and conformity to specified regular expressions.
2. The library offers a pathway to define custom validation rules, thus providing a tailored validation mechanism.

Initiating the use of Data-Binding-Validator is a straightforward process. By adding the following dependency to your Android project, you're good to go:

dependencies {
    implementation 'com.github.Ilhasoft:data-binding-validator:1.2.0'
}

The ease of integration is illustrated through a simple example:

<!-- Defining data-bound element in layout file -->
<EditText
    android:id="@+id/editText"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:bindingVariable="@{viewModel.name}"
    app:validateMinLength="5"
    app:validateMaxLength="10"
    app:validatePattern="^[a-zA-Z0-9]+$" />

// Creating data-binding object in code
val viewModel = ViewModel()

// Validating data-bound data in code
viewModel.name.validate()

This example reflects the verification of the EditText control input against specified minimum length, maximum length, and the regular expression requirements.

For those seeking a more personalized validation logic, Data-Binding-Validator extends a warm welcome. By altering the methods within the DataBindingValidator class, custom validation rules can be established:

// Custom validation rule definition
class CustomValidator : DataBindingValidator() {

    override fun validate(binding: Binding, field: Field): ValidationResult {
        // Custom validation logic
        return super.validate(binding, field)
    }
}

// Utilizing custom validator
val validator = CustomValidator()

// Defining data-bound element in layout file
<EditText
    android:id="@+id/editText"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:bindingVariable="@{viewModel.name}"
    app:validate="validator" />

// Validating data-bound data in code
viewModel.name.validate()