Inflating UI Dynammically Example in Android

activity_main.xml

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <Button
            android:id="@+id/add_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:layout_marginLeft="29dp"
            android:text="Add" />

        <Button
            android:id="@+id/delete_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="36dp"
                        android:layout_marginTop="10dp"
            android:layout_toRightOf="@id/add_button"
            android:text="Delete" />

        <LinearLayout android:id="@+id/child_linear"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/add_button"
            android:layout_marginTop="45dp"
            android:orientation="vertical" >
        </LinearLayout>

    </RelativeLayout>

custom_layout.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" >

    <EditText
        android:id="@+id/editText1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10" />

</LinearLayout>

MainActivity.java

package com.rajeshvijayakumar.inflat;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;

public class MainActivity extends Activity implements OnClickListener {

    private Button mAddButton;
    private Button mDeleteButton;
    private LinearLayout mLinear;
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mAddButton = (Button) findViewById(R.id.add_button);
        mDeleteButton = (Button) findViewById(R.id.delete_button);
        mLinear = (LinearLayout) findViewById(R.id.child_linear);
        mAddButton.setOnClickListener(this);
        mDeleteButton.setOnClickListener(this);
       
    }

    @Override
    public void onClick(View v) {
       
        switch(v.getId()) {
            case R.id.add_button :
                View childView = getLayoutInflater().inflate(R.layout.custom_layout, null);
                mLinear.addView(childView);
                break;
            case R.id.delete_button :
                int childSize = mLinear.getChildCount();
                if(childSize != 0) {
                    mLinear.removeViewAt(childSize - 1);
                }
                break;
        }
    }  
}

Output :

Source Code :  Download this Example Here