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android:configChanges="orientation|screenSize"

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private fun screenOrientation() {
        if (resources.configuration.orientation == Configuration.ORIENTATION_LANDSCAPE)
        {
            //Per abilitare il full screen:
            window.addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN)
            window.clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN)
        }
        else if (resources.configuration.orientation == Configuration.ORIENTATION_PORTRAIT)
        {
            //Per disabilitare il full screen:

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:tools="http://schemas.android.com/tools" package="com.dm.myapplication">

    <application
            android:allowBackup="true"
            android:icon="@mipmap/ic_launcher"
            android:label="@string/app_name"
            android:roundIcon="@mipmap/ic_launcher_round"
            android:supportsRtl="true"

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<activity
android:configChanges="orientation|screenSize"
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">

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import android.content.res.Configuration
import android.view.WindowManager
//potrebbero esserci altri import

class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener {

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val toolbar: Toolbar = findViewById(R.id.toolbar)

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<?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_info"
          android:title="Info"
          android:orderInCategory="100"
          app:showAsAction="never"/>
</menu>

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                val context = applicationContext
                val packageManager = context.packageManager
                val packageName = context.packageName
                /*recupero del nome versione*/
                var versionName = "non disponibile"

                try {
                    versionName = packageManager.getPackageInfo(packageName, 0).versionName
                } catch (e: PackageManager.NameNotFoundException) {
                    e.printStackTrace()

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Questo è l'<b>esempio 1</b> di testo in grassetto

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Questo è l'<i>esempio 1</i> di testo in corsivo

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Testo1<br>
Testo2<br>
Testo3<br>