如果ViewBinding和GoogleMap一起使用会报错

Question

class

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    var viewBinding = ActivityMainBinding.inflate(layoutInflater)
    setContentView(R.layout.activity_main)
}

layout

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <fragment
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MapsActivity" />
</LinearLayout>

enter image description here

If you write ViewBinding and GoogleMap together, an error will occur. If you delete ViewBinding, no error will occur. What's the cause?

Answer 1

This is how you are supposed to do ViewBinding with an Activity:

 private lateinit var binding: ResultProfileBinding override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) binding = ResultProfileBinding.inflate(layoutInflater) val view = binding.root setContentView(view) } ```

As you can see, the resource id of the layout is not used, but the view from the binding instead.

source: https://developer.android.com/topic/libraries/view-binding

And then how you set the SupportMapFragment into the xml:

 <fragment class="com.google.android.gms.maps.SupportMapFragment" android:layout_width="match_parent" android:layout_height="match_parent"/>

Using class instead of android:name

source: https://developers.google.com/android/reference/com/google/android/gms/maps/SupportMapFragment

There is nothing wrong with having SupportMapFragment and ViewBinding together.

Answer 2

var viewBinding = ActivityMainBinding.inflate(layoutInflater) setContentView(R.layout.activity_main)

should be

val viewBinding = ActivityMainBinding.inflate(layoutInflater)
setContentView(viewBinding.root)