MainActivity.kt
package com.example.jetpack
import android.graphics.Color
import android.os.Bundle
import android.text.SpannableString
import android.text.style.ForegroundColorSpan
import android.view.Menu
import android.view.MenuItem
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val actionBar = supportActionBar
actionBar?.apply {
title = "Kotlin - Menu Text Color"
}
}
override fun onCreateOptionsMenu(menu: Menu?): Boolean {
menuInflater.inflate(R.menu.toolbar_menu,menu)
// change menu text color programmatically
menu?.apply {
for(index in 0 until this.size()){
val item = this.getItem(index)
val s = SpannableString(item.title)
s.setSpan(ForegroundColorSpan(Color.GREEN),0,s.length,0)
item.title = s
}
}
return super.onCreateOptionsMenu(menu)
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
when(item.itemId){
R.id.download->{
// do something here
return true
}R.id.upload->{
// do something here
return true
}R.id.cancel->{
// do something here
return true
}R.id.settings->{
// do something here
return true
}
}
return super.onOptionsItemSelected(item)
}
}
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"
app:showAsAction="withText|always" />
<item
android:id="@+id/upload"
android:title="Upload"
android:icon="@drawable/ic_cloud_upload"
app:showAsAction="always|withText" />
<item
android:id="@+id/cancel"
android:title="Cancel"
android:icon="@drawable/ic_cancel"
app:showAsAction="never" />
<item
android:id="@+id/settings"
android:title="Settings"
android:icon="@drawable/ic_settings"
app:showAsAction="never" />
</menu>


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