วิธีการเพิ่ม View ตัวอื่นๆเข้าไปแบบ Programmatically (ใช้โค้ด Java)

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"
    android:id="@+id/layout_root"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.akexorcist.myapplication.MainActivity">

    <Button
        android:id="@+id/btn_add_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Add View" />
</LinearLayout>

MainActivity.java

package com.akexorcist.myapplication;

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {
    private LinearLayout layoutRoot;
    private Button btnAddView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        layoutRoot = (LinearLayout) findViewById(R.id.layout_root);

        btnAddView = (Button) findViewById(R.id.btn_add_view);
        btnAddView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // TODO When user click this button
                addNewView();
            }
        });
    }

    public void addNewView() {
        View view = LayoutInflater.from(this).inflate(R.layout.view_simple_button, null);
        layoutRoot.addView(view);
    }

}

view_simple_button.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button
        android:id="@+id/btn_stupid"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Stupid Button" />
</LinearLayout>