JTTextView

implementation 'com.william:JTTextView:1.0.0'

<com.william.jttextview.JTTextView
        android:id="@+id/jt_text_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:drawablePadding="10dp"
        android:drawableLeft="@drawable/none"
        app:drawableStart_action="@drawable/yes"
        android:drawableTop="@drawable/none"
        app:drawableTop_action="@drawable/yes"
        android:drawableRight="@drawable/none"
        app:drawableEnd_action="@drawable/yes"
        android:drawableBottom="@drawable/none"
        app:drawableBottom_action="@drawable/yes"
        android:text="single click" />

jt1.setOnDrawableClickListener { switchState, view, actionId, currentText ->

            val str = when (actionId) {
                JTTextView.ACTION_START -> "left drawable"
                JTTextView.ACTION_TOP -> "top drawable"
                JTTextView.ACTION_END -> "right drawable"
                else -> "bottom drawable"
            }

            val test = if (switchState) "selected $str" else "give up $str"

            Toast.makeText(this, str, Toast.LENGTH_SHORT).show()
        }
        
jt5.validator = object : JTTextView.Validator {
            override fun isValid(text: CharSequence?): Boolean {
                return when {
                    text == null -> false
                    text.isEmpty() -> {
                        Toast.makeText(this@MainActivity, "please input your account !", Toast.LENGTH_SHORT).show()
                        false
                    }
                    text.length > 6 -> {
                        Toast.makeText(this@MainActivity, "your account's length is longer then 6 !", Toast.LENGTH_SHORT).show()
                        false
                    }
                    else -> true
                }
            }

            //autoComplete
            override fun fixText(invalidText: CharSequence?) = invalidText

        }

It's looks like kotlin ：）

Copyright 2018 william Inc.

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.