Android EditText Koltin

In Android EditText is user interface for entering and modifying text , when using you must specify the type of data that EditText accept  using  android:inputType .

Project Detail

Project Name	AndroidEditText
Package	com.tutorialsbuzz.androidedittext
Min Sdk Version	22
Target Sdk Version	28
Compile Sdk Version	28
Theme	Theme.AppCompat.Light.DarkActionBar

1. gradle

file : build.gradle (Application Level Gradle)

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.tutorialsbuzz.androidedittext"
        minSdkVersion 22
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.core:core-ktx:1.0.2'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.2.0'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}

2. XML Layout

file : activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        tools:context=".MainActivity"
        android:gravity="center"
        android:padding="10dp"
        android:id="@+id/rootLayout">

    <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/hint_text"
            android:id="@+id/editText"
            android:maxLines="1"
            android:imeOptions="actionDone"
            android:inputType="text"
            android:padding="10dp"
    />

</LinearLayout>

• android:inputType : value of this attribute aspecifies the type of data that edittext accepts 

              here are all the possible values of android:inputType

1. none
2. text
3. textCapCharacters
4. textCapWords
5. textCapSentences
6. textAutoCorrect
7. textAutoComplete
8. textMultiLine
9. textImeMultiLine
10. textNoSuggestions
11. textUri
12. textEmailAddress
13. textEmailSubject
14. textShortMessage
15. textLongMessage
16. textPersonName
17. textPostalAddress
18. textPassword
19. textVisiblePassword
20. textWebEditText
21. textFilter
22. textPhonetic
23. textWebEmailAddress
24. textWebPassword
25. number
26. numberSigned
27. numberDecimal
28. numberPassword
29. phone
30. datetime
31. date
32. time

• android:maxLines : Set Number of lines user can input

Note : You just need to make sure you have the attribute "android:inputType" set. It doesn't work without inputType.

• android:hint Show hint text 

EditText on Editor Change Listener

android:imeOptions this attribute takes keyboard action as value
for example if you want to recognize when action DONE button has clicked ,

1.  android:imeOptions attribute equal to “actionDone” ,
2.  Set Editor Change Listener on EditText , override onEditorAction method To Recognize Action DONE.  

 editText.setOnEditorActionListener { v, actionId, event ->
            if (actionId == EditorInfo.IME_ACTION_DONE) {
                Toast.makeText(this@MainActivity, "You Have Entered: " + editText.text.toString(), Toast.LENGTH_SHORT)
                    .show()
                false
            } else {
                false
            }
        }

EditText on TextChange Listener

1. TextChangeListener monitor whenever there is change of text in EditText
2. TextChangeListener interface has 3 method afterTextChanged , beforeTextChanged , onTextChanged 

editText.addTextChangedListener(object : TextWatcher {
 override fun afterTextChanged(s: Editable?) {
  Log.d(TAG, "afterTextChanged: " + s.toString());
 }

 override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
  Log.d(TAG, "beforeTextChanged: " + s.toString());
 }

 override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
  Log.d(TAG, "onTextChanged: " + s.toString());
 }
})

3. Activity

file : MainActivity.kt

package com.tutorialsbuzz.androidedittext

import android.os.Bundle
import android.text.Editable
import android.text.TextWatcher
import android.util.Log
import android.view.inputmethod.EditorInfo
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    val TAG: String = "MainActivity";

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        //EditText on Editor Change Listener
        editText.setOnEditorActionListener { v, actionId, event ->
            if (actionId == EditorInfo.IME_ACTION_DONE) {
                Toast.makeText(this@MainActivity, "You Have Entered: " + editText.text.toString(), Toast.LENGTH_SHORT)
                    .show()
                false
            } else {
                false
            }
        }

        //EditText on TextChange Listener
        editText.addTextChangedListener(object : TextWatcher {
            override fun afterTextChanged(s: Editable?) {
                Log.d(TAG, "afterTextChanged: " + s.toString());
            }

            override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
                Log.d(TAG, "beforeTextChanged: " + s.toString());
            }

            override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
                Log.d(TAG, "onTextChanged: " + s.toString());
            }
        })

    }
}

Download