Android Studio - Bottom Navigation Activity

Bottom Navigation Activity

Bottom Navigation Activity è un tipo di progetto vuoto in cui è presente una barra menù nella parte bassa dello schermo.

AndroidManifest.xml

	<?xml version="1.0" encoding="utf-8"?>
	<manifest xmlns:android="http://schemas.android.com/apk/res/android"
	package="com.dm.tutorialbottomnavigationactivity">
	<application
	android:allowBackup="true"
	android:icon="@mipmap/ic_launcher"
	android:label="@string/app_name"
	android:roundIcon="@mipmap/ic_launcher_round"
	android:supportsRtl="true"
	android:theme="@style/AppTheme">
	<activity
	android:name=".MainActivity"
	android:label="@string/app_name">
	<intent-filter>
	<action android:name="android.intent.action.MAIN"/>
	<category android:name="android.intent.category.LAUNCHER"/>
	</intent-filter>
	</activity>
	</application>
	</manifest>

view raw 3BNA_AndroidManifest.xml hosted with ❤ by GitHub

bottom_nav_menu.xml

	<?xml version="1.0" encoding="utf-8"?>
	<menu xmlns:android="http://schemas.android.com/apk/res/android">
	<item
	android:id="@+id/navigation_home"
	android:icon="@drawable/ic_home_black_24dp"
	android:title="@string/title_home"/>
	<item
	android:id="@+id/navigation_dashboard"
	android:icon="@drawable/ic_dashboard_black_24dp"
	android:title="@string/title_dashboard"/>
	<item
	android:id="@+id/navigation_notifications"
	android:icon="@drawable/ic_notifications_black_24dp"
	android:title="@string/title_notifications"/>
	</menu>

view raw 3BNA_bottom_nav_menu.xml hosted with ❤ by GitHub

activity_main.xml

	<?xml version="1.0" encoding="utf-8"?>
	<android.support.constraint.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/container"
	android:layout_width="match_parent"
	android:layout_height="match_parent"
	tools:context=".MainActivity">
	<TextView
	android:id="@+id/message"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:layout_marginLeft="@dimen/activity_horizontal_margin"
	android:layout_marginTop="@dimen/activity_vertical_margin"
	android:text="@string/title_home"
	app:layout_constraintLeft_toLeftOf="parent"
	app:layout_constraintTop_toTopOf="parent"
	android:textSize="28sp"/>
	<android.support.design.widget.BottomNavigationView
	android:id="@+id/nav_view"
	android:layout_width="0dp"
	android:layout_height="wrap_content"
	android:layout_marginEnd="0dp"
	android:layout_marginStart="0dp"
	android:background="?android:attr/windowBackground"
	app:layout_constraintBottom_toBottomOf="parent"
	app:layout_constraintLeft_toLeftOf="parent"
	app:layout_constraintRight_toRightOf="parent"
	app:menu="@menu/bottom_nav_menu"/>
	</android.support.constraint.ConstraintLayout>

view raw 3BNA_activity_main.xml hosted with ❤ by GitHub

MainActivity.kt

	package com.dm.tutorialbottomnavigationactivity
	import android.os.Bundle
	import android.support.design.widget.BottomNavigationView
	import android.support.v7.app.AppCompatActivity
	import android.widget.TextView
	class MainActivity : AppCompatActivity() {
	private lateinit var textMessage: TextView
	private val onNavigationItemSelectedListener = BottomNavigationView.OnNavigationItemSelectedListener { item ->
	when (item.itemId) {
	R.id.navigation_home -> {
	textMessage.setText(R.string.title_home)
	return@OnNavigationItemSelectedListener true
	}
	R.id.navigation_dashboard -> {
	textMessage.setText(R.string.title_dashboard)
	return@OnNavigationItemSelectedListener true
	}
	R.id.navigation_notifications -> {
	textMessage.setText(R.string.title_notifications)
	return@OnNavigationItemSelectedListener true
	}
	}
	false
	}
	override fun onCreate(savedInstanceState: Bundle?) {
	super.onCreate(savedInstanceState)
	setContentView(R.layout.activity_main)
	val navView: BottomNavigationView = findViewById(R.id.nav_view)
	textMessage = findViewById(R.id.message)
	navView.setOnNavigationItemSelectedListener(onNavigationItemSelectedListener)
	}
	}

view raw 3BNA_MainActivity.kt hosted with ❤ by GitHub

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