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How to disable an item in ListView in Android

activity_main.xml

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/rl"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="10dp"
    tools:context=".MainActivity"
    android:background="#add67c"
    >
    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Disable First Item From ListView"
        />
    <ListView
        android:id="@+id/lv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/btn"
        />
</RelativeLayout>
MainActivity.java

package com.cfsuman.me.androidcodesnippets;

import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class MainActivity extends Activity {

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

        // Get reference of widgets from XML layout
        final ListView lv = (ListView) findViewById(R.id.lv);
        final Button btn = (Button) findViewById(R.id.btn);

        // Initializing a new String Array
        String[] fruits = new String[] {
                "American Pawpaw",
                "Apricot",
                "Araza",
                "Atherton Raspberry",
                "Avocado"
        };

        // Create a List from String Array elements
        final List<String> fruits_list = new ArrayList<String>(Arrays.asList(fruits));

        // Create an ArrayAdapter from List
        final ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>
                (this, android.R.layout.simple_list_item_1, fruits_list);

        // DataBind ListView with items from ArrayAdapter
        lv.setAdapter(arrayAdapter);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Disable the first item from ListView
                // ListView items are zero (0) based index
                lv.getChildAt(0).setEnabled(false);
            }
        });
    }
}
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