ValidatedTextInputLayout

An extension to android design support library's TextInputLayout with validation support

Demo

Note: v1.0.0-beta1 adds migration to androidx and to kotlin from java. Upgrading to beta might break your code.

Features

• AutoValidation
  Validate the input field as the text changes.
  input.autoValidate(true) If false you need to call the validate() method explicitly for validation.
  OR
  use xml attribute autoValidate as true or false.

• AutoTrim
  input.getValue() will return the value of input field after removing leading and trailing white spaces

  input.autoTrimValue(true) OR
  use xml attribute autoTrim as true or false.

• Add Validators
  You can add multiple validators to a single input field.
  input.addValidator(/* Your first Validator class goes here */) input.addValidator(/* Your second Validator class goes here */)

• Clear Validators
  Removes all the validators associated with the input field.
  input.clearValidators()

• Default Available Validators

  • RequiredValidator
    Validates the input field as required. i.e. empty value is not valid.
    input.addValidator(RequiredValidator("Your error message")) OR
    use xml attribute isRequired as true or false.
    The default message will be "This field is required."
    For custom message you can use xml attribute requiredValidationMessage

  • LengthValidator
    Validates the input field against minimum and maximum length specified.
    input.addValidator(LengthValidator(8 /* Max Length */, "Your error message")) input.addValidator(LengthValidator(4 /* Min Length */, *8 /* Max Length */, "Your error message")) OR
    use xml attributes minLength and maxLength with default values being "zero" and "indefinite" respectively.
    The default message will be one of following

    • The input must have length between "minLength" and "maxLength".
    • The input length must be greater than or equal to "minLength".
    • The input length must be less than or equal to "maxLength".
      based on your values for minLength and maxLength attributes.
      For custom message you can use xml attribute lengthValidationMessage

  • RegexValidator
    Validates the input field against provided regular expression. Equivalent to String.matches()
input.addValidator(new RegexValidator("your_regex", "Your error message")) OR
    use xml attribute regex to set your regular expression.
    The default message will be "The field value does not match the required format."
    For custom message you can use xml attribute regexValidationMessage

  • DependencyValidator
    Validates the input field as per the dependency type with the input field it depends on.
    If input1 depends on input2 with dependency type TYPE_EQUAL: (i.e. input1 .getValue() must be equal to input1.getValue())
    input1.addValidator(new DependencyValidator(input2, TYPE_EQUAL, "Your error message"))

• Custom Validators
  You can create your own validators to use with ValidatedTextInputLayout just by extending the BaseValidator class.
  You need to call the super() method with the desired message and override isValid() method to return true or false;

Example: Validator class to check if field value contains character sequence "xyz"

    class MyValidator(errorMessage: String,
                      callback: ValidationCallback? = null): BaseValidator(errorMessage, callback) {
        override fun isValid(text: String): Boolean {
            return text.contains("xyz")
        }
    }

• Validation Callback You can add callbacks to the validators from constructor or a setter using the ValidationCallback class.

Usage

• Maven

   <dependency>
         <groupId>com.julianraj</groupId>
         <artifactId>validatedtextinputlayout</artifactId>
         <version>1.0.0-beta1</version>
         <type>pom</type>
   </dependency>
  

• Gradle

   compile 'com.julianraj:validatedtextinputlayout:1.0.0-beta1'
  

• You can use and style it similar to Android Design Library's TextInputLayout

   <com.julianraj.validatedtextinputlayout.ValidatedTextInputLayout
           android:id="@+id/username"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           validation:autoTrim="true"
           validation:isRequired="true"
           validation:requiredValidationMessage="Your error message here.">
   
           <com.google.android.material.textfield.TextInputEditText
               android:layout_width="match_parent"
               android:layout_height="wrap_content"
               android:hint="Username"
               android:singleLine="true"/>
   
   </com.julianraj.validatedtextinputlayout.ValidatedTextInputLayout>
   
   <com.julianraj.validatedtextinputlayout.ValidatedTextInputLayout
           android:id="@+id/password"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           validation:autoValidate="true"
           validation:lengthValidationMessage="Your error message here."
           validation:maxLength="8"
           validation:minLength="4">
   
           <com.google.android.material.textfield.TextInputEditText
               android:layout_width="match_parent"
               android:layout_height="wrap_content"
               android:hint="Password (AutoValidated)"
               android:inputType="textPassword"
               android:singleLine="true"/>
   
   </com.julianraj.validatedtextinputlayout.ValidatedTextInputLayout>
   
   <com.julianraj.validatedtextinputlayout.ValidatedTextInputLayout
           android:id="@+id/email"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           validation:autoTrim="true"
           validation:regex="^[a-z0-9._%+-]+@(?:[a-z0-9-]+[.])+[a-z]{2,}$"
           validation:regexValidationMessage="Your error message here">
   
           <com.google.android.material.textfield.TextInputEditText
               android:layout_width="match_parent"
               android:layout_height="wrap_content"
               android:hint="Email"
               android:singleLine="true"/>
   </com.julianraj.validatedtextinputlayout.ValidatedTextInputLayout>
  

License

Copyright 2016 Julian Raj Manandhar

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.