Android Question delete black page at the beggning of activities

[msms developer]

Hi developers.
I have a bad problem. At the start of each of my activities i can see a black page.
I set the Animation Duration of each layout = 0
And i set my app theme like this:
SetApplicationAttribute(android:theme,"@android:style/Theme.Holo.Light.NoActionBar.Fullscreen")
in addition i want to say i used immersive mode in my app.
I want to see nothing.
Please help me.

 

[Erel]

SetApplicationAttribute(android:theme,"@android:style/Theme.Holo.Light.NoActionBar.Fullscreen")

This is a mistake. You are using the old Android 4 theme.

Full screen theme: https://www.b4x.com/android/forum/threads/full-screen-theme.93892/#content
Change the theme colors: https://www.b4x.com/android/forum/threads/theme-colors.87716/

Make sure to load the layout quickly and don't do too much things when the activity is created.

 

[msms developer]

Thank you Erel but i should say the problem is already exist.

 

[Erel]

There will never be a black screen if you change the theme color. You did something wrong.

 

[msms developer]

This is my manifest code.
I see a gray page whit blue navigation bar at start of each activities.
but it,s short so where is the problem?

AddManifestText(
<uses-sdk android:minSdkVersion="19" android:targetSdkVersion="30"/>
<supports-screens android:largeScreens="true"
    android:normalScreens="true"
    android:smallScreens="true"
    android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
SetApplicationAttribute(android:theme, "@style/DarkTheme")
CreateResource(values, colors.xml,
<resources>
   <color name="actionbar">#ff039be5</color>
   <color name="statusbar">#ff006db3</color>
   <color name="textColorPrimary">#ffffffff</color>
   <color name="navigationBar">#039BE5</color>
</resources>
)

CreateResource(values-v20, theme.xml,
<resources>
    <style
        name="DarkTheme" parent="@android:style/Theme.Material.NoActionBar.Fullscreen">
         <item name="android:navigationBarColor">@color/navigationBar</item>
    </style>
</resources>
)
CreateResource(values-v14, theme.xml,
<resources>
    <style
        name="DarkTheme" parent="@android:style/Theme.Holo.NoActionBar.Fullscreen">
                 <item name="android:navigationBarColor">@color/navigationBar</item>

    </style>
</resources>
)
AddPermission(android.permission.INTERNET)

 

[Erel]

(You should set targetSdkVersion to 29.)

There is no problem. If you want the layout to appear faster then you need to make it lighter and don't do too many things when the activity is created. You can use Sleep(100) to let the layout appear and then do other things.