AndroidVerify
Android library designed for rapid and customizable form validation.
Demo
Setup
To use this library your minSdkVersion must be >= 15.
In your project level build.gradle :
allprojects {
repositories {
...
maven {
url "https://jitpack.io"
}
}
}
In your app level build.gradle :
dependencies {
compile 'com.github.pchmn:AndroidVerify:1.0.2'
}
Usage
You can use AndroidVerify with any View that extends the original EditText (such as MaterialEditText for example).
With XML
You just have to wrap your EditText with an InputValidator view. Example for an email and a custom regex :
<com.pchmn.androidverify.InputValidator
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:required="true"
app:requiredMessage="Email required">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"
android:hint="Email"/> </com.pchmn.androidverify.InputValidator>
<com.pchmn.androidverify.InputValidator
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:regex="^[0-9]{
4
}
$"
app:errorMessage="4 digits only">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Regex 4 digits (custom error msg)"/> </com.pchmn.androidverify.InputValidator>
InputValidator will automatically recognized textEmailAdress, phone and number inputType and use the appropriate validator, like in the example with the email field.
If you don't specify an errorMessage or a requiredMessage, predefined messages will be shown if the field is not valid.
Then validate your form :
// initiate from an activity // 'this' represents an Activity // you can specify if you want to show error messages or not Form form = new Form.Builder(this)
.showErrors(true)
.build();
// or initiate from a fragment or from what you want by providing your own root view Form form = new Form.Builder(getContext(), rootView)
.showErrors(true)
.build();
// validate the form if(form.isValid()) {
// the form is valid
}
else {
// the form is not valid
}
With Java
You can create programmatically InputValidator without passing by XML ( see all Builder methods) :
// create the validator with the Builder // emailEditText is the EditText to validate // 'this' represents a Context InputValidator emailValidator = new InputValidator.Builder(this)
.on(emailEditText)
.required(true)
.validatorType(InputValidator.IS_EMAIL)
.build();
// create the form and add the validator Form form = new Form.Builder(this)
.addInputValidator(emailValidator)
.build();
// validate the form if(form.isValid()) {
// the form is valid
}
else {
// the form is not valid
}
You can create programmatically without using the Builders, but it is safer and quicker to use Builders.
Attributes
InputValidator
All the attributes that can be used with the InputValidator view. They can be used in XML or in Java with setters :
| Attribute | Type | Description |
|---|---|---|
app:required | boolean | Whether the field is required or not |
app:validator | enum | Use a validator type predefined by FormValidator. You can use isEmail, isPhoneNumber, isNumeric, isUrl or isIP |
app:minLength | int | The minimum length of the field |
app:maxLength | int | The maximum length of the field |
app:minValue | int | The minimum value of the field (must be numeric) |
app:maxValue | int | The maximum value of the field (must be numeric) |
app:regex | string | Use a regex to validate a field |
app:identicalAs | reference id | The id of an EditText to which the field must be equal |
app:errorMessage | string | The message to display if the field is not valid |
app:requiredMessage | string | The message to display if the field is empty but was required. It implies that the field is required |
Form
All the attributes that can be used with the Form view. They can be used in XML or in Java with setters :
| Attribute | Type | Default | Description |
|---|---|---|---|
app:showErrors | boolean | true | Whether the errors must be shown on each EditText or not |
Advanced Usage
Use a custom validator
You can use a custom validator for an InputValidator :
// the InputValidator was present in the XML layout InputValidator inputValidator = (InputValidator) findViewById(R.id.input_validator);
// your custom validator must extends AbstractValidator class inputValidator.setCustomValidator(new AbstractValidator() {
@Override
public boolean isValid(String value) {
return value.equals("ok man");
}
@Override
public String getErrorMessage() {
return "This field must be equals to 'ok man'";
}
}
);
// or create your InputValidator with the Builder InputValidator inputValidator = new InputValidator.Builder(this)
.on(anEditText)
.customValidator(new AbstractValidator() {
@Override
public boolean isValid(String value) {
return value.equals("ok man");
}
@Override
public String getErrorMessage() {
return "This field must be equals to 'ok man'";
}
}
);
.build();
Use the Form view in XML
If you want, you can use a Form view directly in XML. This view extends LinearLayout. It must wrap all the fields you want to check.
It can be useful for these reasons :
- You don't have to instantiate a
Formobject before validate the form - It will be easier to identify a form in your XML layout
- You can use two different and independent forms in the same XML layout
XML
<!-- form1 -->
<com.pchmn.androidverify.Form
android:id="@+id/form1"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:showErrors="false">
<!-- email -->
<com.pchmn.androidverify.InputValidator
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"
android:hint="Email"/>
</com.pchmn.androidverify.InputValidator>
<!-- password -->
<com.pchmn.androidverify.InputValidator
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:required="true"
app:minLength="6">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:hint="Password (6 char. min) *" />
</com.pchmn.androidverify.InputValidator>
</com.pchmn.androidverify.Form>
<!-- /form1 -->
<!-- form2 -->
<com.pchmn.androidverify.Form
android:id="@+id/form2"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<!-- phone number -->
<com.pchmn.androidverify.InputValidator
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:required="true">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="phone"
android:hint="Phone number *"/>
</com.pchmn.androidverify.InputValidator>
<!-- age -->
<com.pchmn.androidverify.InputValidator
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:minValue="12">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="number"
android:hint="Age (12 min)" />
</com.pchmn.androidverify.InputValidator>
</com.pchmn.androidverify.Form>
<!-- /form2 -->Validate the forms
// get the forms // you don't have to instantiate them because they already know the fields they have to validate Form form1 = (Form) findViewById(R.id.form1);
Form form2 = (Form) findViewById(R.id.form2);
// validate form1 if(form1.isValid()) {
// form1 is valid
}
// validate form2 if(form2.isValid()) {
// form2 is valid
}
Builders method
It is recommended to use the builders to create Form and InputValidator views programmatically in order to prevent some errors. All the attributes for the two views are supported by the builders.
InputValidator builder
InputValidator inputValidator = new InputValidator.Builder(this)
// methods
.build();
| Method | Return value | Description |
|---|---|---|
InputValidator.Builder(Context context) | InputValidator.Builder | The constructor of the builder |
on(EditText editText) | InputValidator.Builder | The EditText to validate |
required(boolean required) | InputValidator.Builder | Whether the field is required or not |
validatorType(int type) | InputValidator.Builder | Use a validator type predefined by FormValidator. You can use InputValidator.IS_EMAIL, InputValidator.IS_PHONE_NUMBER, InputValidator.IS_NUMERIC, InputValidator.IS_URL or InputValidator.IS_IP |
customValidator(AbstractValidator validator) | InputValidator.Builder | Use a custom validator |
minLength(int length) | InputValidator.Builder | The minimum length of the field |
maxLength(int length) | InputValidator.Builder | The maximum length of the field |
minValue(int value) | InputValidator.Builder | The minimum value of the field (must be numeric) |
maxValue(int value) | InputValidator.Builder | The maximum value of the field (must be numeric) |
regex(String regex) | InputValidator.Builder | Use a regex to validate a field |
identicalAs(int id) | InputValidator.Builder | The id of an EditText to which the field must be equal |
identicalAs(EditText editText)` | InputValidator.Builder | An other EditText to which the field must be equal |
errorMessage(String message) | InputValidator.Builder | The message to display if the field is not valid |
requiredMessage(String message) | InputValidator.Builder | The message to display if the field is empty but was required |
build() | InputValidator | Create the InputValidator object |
Form builder
Form form = new Form.Builder(this)
// methods
.build();
| Method | Return value | Description |
|---|---|---|
Form.Builder(Activity activity) | Form.Builder | First constructor of the builder |
Form.Builder**(Context context, View rootView) | Form.Builder | Second constructor of the builder |
Form.Builder(Context context) | Form.Builder | Third constructor of the builder. Be aware of possibly inflating errors using this constructor |
addInputValidator(InputValidator validator) | Form.Builder | Add an InputValidator |
showErrors(boolean show) | Form.Builder | Whether the errors must be shown on each EditText or not |
build() | Form | Create the Form object |
Sample
A sample app with some use cases of the library is available on this link
Credits
License
Copyright 2017 pchmn 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.