Thursday, June 11, 2020

android kotlin - Menu add remove update item programmatically

MainActivity.kt

package com.example.jetpack

import android.annotation.SuppressLint
import android.os.Bundle
import android.view.Menu
import android.view.MenuItem
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.appcompat.view.menu.MenuBuilder


class MainActivity : AppCompatActivity() {

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

        val actionBar = supportActionBar
        actionBar?.apply {
            title = "Menu Add Remove Item"
        }
    }


    @SuppressLint("RestrictedApi")
    override fun onCreateOptionsMenu(menu: Menu?): Boolean {
        menuInflater.inflate(R.menu.toolbar_menu,menu)

        menu?.apply {
            // ----------------- add a new item to menu ----------------
            // add new item to menu
            val newItem:MenuItem = menu.add(
                Menu.NONE, // group id
                2, // item id
                1, // order
                "New Item" // title
            )

            // set new item's icon
            newItem.setIcon(R.drawable.ic_check_circle)

            // set new item show as action flags
            newItem.setShowAsActionFlags(
                MenuItem.SHOW_AS_ACTION_ALWAYS or
                MenuItem.SHOW_AS_ACTION_WITH_TEXT
            )

            // menu new item click listener
            newItem.setOnMenuItemClickListener {
                Toast.makeText(this@MainActivity,
                    "New Item Clicked",
                    Toast.LENGTH_SHORT)
                    .show()
                true
            }


            // ----------------- remove an item from menu ----------------
            menu.removeItem(R.id.cancel)


            // ----------------- update an item in menu ----------------
            menu.findItem(R.id.settings).apply {
                title = "Updated Title"
            }
        }


        // To display icon on overflow menu
        if (menu is MenuBuilder) {
            menu.setOptionalIconsVisible(true)
        }

        return super.onCreateOptionsMenu(menu)
    }
}
activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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:id="@+id/constraintLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"/>
res/menu/toolbar_menu.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/download"
        android:title="Download"
        android:icon="@drawable/ic_arrow_download"
        android:orderInCategory="0"
        app:showAsAction="withText|always" />
    <item
        android:id="@+id/upload"
        android:title="Upload"
        android:icon="@drawable/ic_cloud_upload"
        android:orderInCategory="2"
        app:showAsAction="never" />
    <item
        android:id="@+id/cancel"
        android:title="Cancel"
        android:icon="@drawable/ic_cancel"
        android:orderInCategory="3"
        app:showAsAction="never" />
    <item
        android:id="@+id/settings"
        android:title="Settings"
        android:icon="@drawable/ic_settings"
        android:orderInCategory="4"
        app:showAsAction="never" />
</menu>