Android Question [solved] Starting app with dark mode

angel_ · Nov 30, 2019

When I start the app the white screen appears while loading the views, how can I remove this effect or directly start the app with the dark mode?, is possible?

B4X:

AddManifestText(
<uses-sdk android:minSdkVersion="14" android:targetSdkVersion="28"/>
<supports-screens android:largeScreens="true"
    android:normalScreens="true"
    android:smallScreens="true"
    android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
CreateResourceFromFile(Macro, Themes.DarkTheme)

SetApplicationAttribute(android:theme, "@style/MyAppTheme")

CreateResource(values, MyAppTheme.xml,
<resources>
    <style name="MyAppTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
    </style>
</resources>
)

yfleury · Dec 1, 2019

In designer, click on activity and set color to black

Erel · Dec 1, 2019

Do you need to support both light and dark themes? If not then use a dark theme.

angel_ · Dec 1, 2019

Erel said:
Do you need to support both light and dark themes? If not then use a dark theme.

Yes, I want to support both themes.

Erel · Dec 1, 2019

Make sure that your app appears as fast as possible. In most cases it should load fast enough that you don't need to worry about the base activity color.

If you are loading a large layout file then you can defer it by adding Sleep(50) before loading the layout.

angel_ · Dec 2, 2019

Erel said:
Make sure that your app appears as fast as possible. In most cases it should load fast enough that you don't need to worry about the base activity color.

If you are loading a large layout file then you can defer it by adding Sleep(50) before loading the layout.

I tried that but it appears like a flash, it is very very short but it is uncomfortable

Erel · Dec 2, 2019

Changing the theme colors: https://www.b4x.com/android/forum/threads/theme-colors.87716/#post-554897

The relevant item name is: android:windowBackground

angel_ · Dec 2, 2019

Erel said:
Changing the theme colors: https://www.b4x.com/android/forum/threads/theme-colors.87716/#post-554897

The relevant item name is: android:windowBackground

Thank you

B4X:

CreateResource(values, MyAppTheme.xml,
<resources>
    <style name="MyAppTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
        <item name="android:windowBackground">@android:color/black</item>
    </style>
</resources>
)

Android Question [solved] Starting app with dark mode

angel_

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