KT: สร้าง Button แบบ programmatically

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <LinearLayout
        android:id="@+id/ll_main_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="vertical"></LinearLayout>

</android.support.constraint.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity">

<LinearLayout

android:id="@+id/ll_main_layout"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:gravity="center"

android:orientation="vertical"></LinearLayout>

</android.support.constraint.ConstraintLayout>

MainActivity.kt

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.view.ViewGroup
import android.widget.Button
import android.widget.LinearLayout
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

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

        // creating the button
        val button = Button(this)
        // setting layout_width and layout_height using layout parameters
        button.layoutParams = LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.WRAP_CONTENT, 
                ViewGroup.LayoutParams.WRAP_CONTENT)
        button.text = "Dynamic Button"
        // add Button to LinearLayout
        ll_main_layout.addView(button)
    }
}

import android.support.v7.app.AppCompatActivity

import android.os.Bundle

import android.view.ViewGroup

import android.widget.Button

import android.widget.LinearLayout

import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

override fun onCreate(savedInstanceState: Bundle?) {

super.onCreate(savedInstanceState)

setContentView(R.layout.activity_main)

// creating the button

val button = Button(this)

// setting layout_width and layout_height using layout parameters

button.layoutParams = LinearLayout.LayoutParams(

LinearLayout.LayoutParams.WRAP_CONTENT,

ViewGroup.LayoutParams.WRAP_CONTENT)

button.text = "Dynamic Button"

// add Button to LinearLayout

ll_main_layout.addView(button)

}

บรรทัดที่ 17 : มีการกำหนด LayoutParams()

Phaisarn Sutheebanjard

blog.phaisarn.com

KT: สร้าง Button แบบ programmatically