onCreate在抽象的父活动中没有在kotlin中调用

Question

我的活动是MapActivity的孩子.

class RecordingActivity : MapActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        Log.d("RecirdingActivity", "InitializeMap") //called
    }

    override fun getView(): Int {
        return R.layout.activity_recording
    }
}

我从我的主要活动中调用此活动:

fab.setOnClickListener {
            Log.d("MainActivity", "fabClick") //called
            startActivity(intentFor<RecordingActivity>())
        }

我有抽象的活动:

abstract class MapActivity: AppCompatActivity(), OnMapReadyCallback {

    override fun onCreate(savedInstanceState: Bundle?, persistentState: PersistableBundle?) {
        super.onCreate(savedInstanceState, persistentState)
        setContentView(getView())
        initializeMap()
        Log.d("MapActivity", "InitializeMap")//not called
    }
}

而本次活动的onCreate方法永远不会被调用

我用调试器跟踪它,我得到了相同的结果.我做错了什么？

Answer 1

似乎有两种解决方案:

1. 也许onCreate你真正想要覆盖的MapActivity是签名onCreate(android.os.Bundle):

   abstract class MapActivity: AppCompatActivity(), OnMapReadyCallback {
   
       override fun onCreate(savedInstanceState: Bundle?) {
           super.onCreate(savedInstanceState)
           setContentView(getView())
           initializeMap()
           Log.d("MapActivity", "InitializeMap")
       }
   }
   

2. onCreate(android.os.Bundle, android.os.PersistableBundle)被覆盖的方法的文档MapActivity表明,persistableMode对于AndroidManifest.xml需要设置的活动,persistAcrossReboots要调用它...但是MapActivity是抽象的,因此您需要为其子类设置属性.在这种情况下,这将是RecordingActivity.

   <?xml version="1.0" encoding="utf-8"?>
   <manifest>
       ...
       <application>
           ...
           <activity
               android:name=".RecordingActivity"
               android:persistableMode="persistAcrossReboots"/>
           ...
       </application>
       ...
   </manifest>