Googlemap not working in Android Emulator

It used to work before, but suddenly failed to use google map on Android Emulator.
It's working on Test, Run mode on web, but not in emulator.

This is the error.

E/MethodChannel#flutter/platform_views( 8794): Failed to handle method call
E/MethodChannel#flutter/platform_views( 8794): java.lang.RuntimeException: API key not found.  Check that <meta-data android:name="com.google.android.geo.API_KEY" android:value="your API key"/> is in the <application> element of AndroidManifest.xml
E/MethodChannel#flutter/platform_views( 8794): 	at com.google.maps.api.android.lib6.common.c.b(:com.google.android.gms.policy_maps_core_dynamite@[email protected]:110)
E/MethodChannel#flutter/platform_views( 8794): 	at com.google.android.gms.maps.internal.CreatorImpl.c(:com.google.android.gms.policy_maps_core_dynamite@[email protected]:427)
E/MethodChannel#flutter/platform_views( 8794): 	at com.google.android.gms.maps.internal.CreatorImpl.logInitialization(:com.google.android.gms.policy_maps_core_dynamite@[email protected]:16)
E/MethodChannel#flutter/platform_views( 8794): 	at com.google.android.gms.maps.internal.i.bp(:com.google.android.gms.policy_maps_core_dynamite@[email protected]:75)
...
1 reply