Options Menu Fragment - Kotlin

Options Menu Fragment - Android Studio - Kotlin

This will cover the followings:
✓Use Options Menu / Actionbar menu
✓Use Options Menu in fragments
✓Add items with icons in options menu
✓Show different options of an options menu in each fragment
✓Handle options menu's item clicks
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Video:

Step 1: Create a new Project or open new project

Step 2: Code

menu_main.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <item
        android:id="@+id/action_settings"
        android:title="Settings"/>

    <item android:id="@+id/action_sort"
        android:title="Sort"
        android:icon="@drawable/ic_sort_white"
        app:showAsAction="always"/>

</menu>

FragmentOne.kt

package com.blogspot.atifsoftwares.myapplication


import android.os.Bundle
import android.support.v4.app.Fragment
import android.view.LayoutInflater
import android.view.Menu
import android.view.MenuInflater
import android.view.MenuItem
import android.view.View
import android.view.ViewGroup
import android.widget.Toast


/**
 * A simple [Fragment] subclass.
 */
class FragmentOne : Fragment() {


    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                              savedInstanceState: Bundle?): View? {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_fragment_one, container, false)
    }

    //enable options menu in this fragment
    override fun onCreate(savedInstanceState: Bundle?) {
        setHasOptionsMenu(true)
        super.onCreate(savedInstanceState)
    }
    //inflate the menu
    override fun onCreateOptionsMenu(menu: Menu?, inflater: MenuInflater?) {
        inflater!!.inflate(R.menu.menu_main, menu)
        super.onCreateOptionsMenu(menu, inflater)
    }
    //handle item clicks of menu
    override fun onOptionsItemSelected(item: MenuItem?): Boolean {
        //get item id to handle item clicks
        val id = item!!.itemId
        //handle item clicks
        if (id == R.id.action_settings){
            //do your action here, im just showing toast
            Toast.makeText(activity, "Settings", Toast.LENGTH_SHORT).show()
        }
        if (id == R.id.action_sort){
            //do your action here, im just showing toast
            Toast.makeText(activity, "Sort", Toast.LENGTH_SHORT).show()
        }

        return super.onOptionsItemSelected(item)
    }

}

FragmentTwo.kt

package com.blogspot.atifsoftwares.myapplication


import android.os.Bundle
import android.support.v4.app.Fragment
import android.view.LayoutInflater
import android.view.Menu
import android.view.MenuInflater
import android.view.MenuItem
import android.view.View
import android.view.ViewGroup
import android.widget.Toast


/**
 * A simple [Fragment] subclass.
 */
class FragmentTwo : Fragment() {


    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                              savedInstanceState: Bundle?): View? {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_fragment_two, container, false)
    }

    //enable options menu in this fragment
    override fun onCreate(savedInstanceState: Bundle?) {
        setHasOptionsMenu(true)
        super.onCreate(savedInstanceState)
    }
    //inflate the menu
    override fun onCreateOptionsMenu(menu: Menu?, inflater: MenuInflater?) {
        inflater!!.inflate(R.menu.menu_main, menu)

        //hide some items from this fragment (e.g. sort)
        menu!!.findItem(R.id.action_sort).isVisible = false

        super.onCreateOptionsMenu(menu, inflater)
    }
    //handle item clicks of menu
    override fun onOptionsItemSelected(item: MenuItem?): Boolean {
        //get item id to handle item clicks
        val id = item!!.itemId
        //handle item clicks
        if (id == R.id.action_settings){
            //do your action here, im just showing toast
            Toast.makeText(activity, "Settings", Toast.LENGTH_SHORT).show()
        }

        return super.onOptionsItemSelected(item)
    }

}

FragmentThree.kt

package com.blogspot.atifsoftwares.myapplication


import android.os.Bundle
import android.support.v4.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup


/**
 * A simple [Fragment] subclass.
 */
class FragmentThree : Fragment() {


    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                              savedInstanceState: Bundle?): View? {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_fragment_three, container, false)
    }

    /*Leaving this fragment as it is, because to show example of fragment having no options menu*/

}

Step 3: Run Project

Output:

Options Menu Fragment - Android Studio - Kotlin