Unresolved Reference: Theme_AppCompat_NoActionBar in Android Project

[dschandrasekara]

The flutter_mapbox_navigation plugin causes build failures due to unresolved references to Theme_AppCompat_NoActionBar in the following files:

• NavigationActivity.kt
• EmbeddedNavigationViewFactory.kt

This issue occurs because the required AppCompat theme is either not included in the plugin's dependencies or improperly referenced.

Steps to Reproduce:

1. Add flutter_mapbox_navigation version 0.2.2 to a Flutter project.
2. Build the project for Android using flutter build apk.

Observed Error:

Unresolved reference 'Theme_AppCompat_NoActionBar' in:
- NavigationActivity.kt (line 84)
- EmbeddedNavigationViewFactory.kt (line 35)

[22chiragmodh]

You need to add implementation 'com.google.android.material:material:1.8.0'
line into root project/android/app/build.gradle dependencies block like below

dependencies { implementation 'androidx.appcompat:appcompat:1.6.1' implementation 'com.google.android.material:material:1.8.0' // other dependencies... }

• instead of setTheme(R.style.Theme_AppCompat_NoActionBar) use setTheme(com.google.android.material.R.style.Theme_MaterialComponents_NoActionBar) in NavigationActivity.kt file

• instead of activity.setTheme(R.style.Theme_AppCompat_NoActionBar) use activity.setTheme(com.google.android.material.R.style.Theme_MaterialComponents_NoActionBar) in EmbeddedNavigationViewFactory.kt file.

your issues will solved after above changes.

[Krupal001]

instead of activity.setTheme(R.style.Theme_AppCompat_NoActionBar) use activity.setTheme(R.style.AppTheme) in EmbeddedNavigationViewFactory.kt file.
and also in NavigationActivity.kt file and your issue is resolved