FloatingLabelValidator
A small library including an example app demonstrating a concept of combining the 'floating label' pattern with form validation. Youtube video demo
This is more a proof of concept than a full blown library but if you want to use it all the files you need are in the lib folder.
<com.ivanwooll.floatinglabelvalidator.lib.FloatingLabelTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:hint="alpha"
app:allowEmpty="false"
app:validatorType="alpha" />
<com.ivanwooll.floatinglabelvalidator.lib.FloatingLabelTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:hint="numeric"
app:allowEmpty="false"
app:validatorType="numeric" />
<com.ivanwooll.floatinglabelvalidator.lib.FloatingLabelTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:hint="alpha numeric"
app:allowEmpty="false"
app:validatorType="alphaNumeric" />
<com.ivanwooll.floatinglabelvalidator.lib.FloatingLabelTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:hint="email"
app:allowEmpty="false"
app:validatorType="email" />
<com.ivanwooll.floatinglabelvalidator.lib.FloatingLabelTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:hint="phone number"
app:allowEmpty="false"
app:validatorType="phone" />