我有一个简单的空活动,判断是否需要请求权限.当调用registerForActivityResult
时,它会崩溃,错误java.lang.IllegalStateException: LifecycleOwner com.example.app.PermsRequester@41a30da is attempting to register while current state is RESUMED. LifecycleOwners must call register before they are STARTED.
来self 的研究,我需要判断savedInstanceState
是否是null
,如果是,创建一个新的fragment
?我不确定这是否是正确的解决方案,也不确定如何实施.代码如下:
class PermsRequester : AppCompatActivity() {
requestPerms = false
override fun onCreate(savedInstanceState: Bundle?) {
setTheme(R.style.AppTheme)
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_perms_requester)
findViewById<Button>(R.id.acceptButton).setOnClickListener { accepted() }
}
private fun accepted() {
//There is code here to check if rationale dialog needs to be displayed
//There is code here to build a mutable list of permissions that need to be requested and sets requestPerms = true
if(requestPerms)
requestPermissions()
}
private fun requestPermissions() {
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
//app crashes on the following line
val requestMultiplePermissions = registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) {
permissions -> permissions.entries.forEach {
//Handles permission result
}
}
}
}
}