Display action bar in few activities

Question

I created a custom theme style with no action bar:

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
</style>

And in my manifest I use this style:

<application
    android:largeHeap="true"
    android:name="androidx.multidex.MultiDexApplication"
    android:allowBackup="true"
    android:icon="@drawable/icon"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">

That way there is no action bar in all of my activites. However I would like it to appear in just certain activities. I tried to add the code:

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    val layoutInflater: LayoutInflater = LayoutInflater.from(this)
    val view: View = layoutInflater.inflate(R.layout.activity_edit_profile, null)

    setContentView(view)
    supportActionBar?.show()

But the action bar is not showing and I assume the reason is that the theme doesn't support an action bar. I would only like to display the action bar in few activities, even so should I create a theme with an action bar and hide it programatically in most of the activities?

Answer 1

Create style with action bar

<!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>

    </style>

then create another style with no action bar

<style name="AppTheme.NoActionBar">
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
    </style>

then use like this

activities with action bar

<activity android:name=".MyActivity"
            android:theme="@style/AppTheme"
            android:label="MyActivity"></activity>

activities with no action bar

<activity android:name=".MyActivity"
            android:theme="@style/AppTheme.NoActionBar"
            android:label="MyActivity"></activity>