我实现了一个ArrayAdapter
以填充我的Spinner
视图。的Spinner
工作正常,但是当我单击微调器中的项目时,android并未检测到。
我所有的要求遵守微调例如在Android文档包括实施AdapterView.OnItemSelectedListener
我的活动,并覆盖它的两个方法OnItemSelectedListener
和onNothingSelected
,但是,没有我的Log
那些方法报表打印,使他们不被调用。
我还通过将监听器设置为微调器choose_user.onItemSelectedListener = this@PlayerDetails
。
这是我的活动:
class PlayerDetails : AppCompatActivity(), View.OnClickListener, TextWatcher, AdapterView.OnItemSelectedListener {
val TAG: String = "PlayerDetails"
val FirebaseTAG: String = "FirebaseDebug"
var numOfPlayers: Int = 1
var currentPlayer: Int = 1
var name: String = ""
var age: Int = 0
var genderId: Int = 0
var genderResult: String = ""
val db = FirebaseFirestore.getInstance()
var users: MutableList<String> = mutableListOf()
private lateinit var binding: ActivityPlayerDetailsBinding
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val sharedPref = [email protected](Context.MODE_PRIVATE)
val applicationID: String? = sharedPref.getString("applicationID", null)
binding = DataBindingUtil.setContentView(this, R.layout.activity_player_details)
if (applicationID != null) {
db.collection("phones").document(applicationID)
.collection("users")
.get()
.addOnSuccessListener { result ->
for (document in result){
val name = document.get("name").toString()
users.add(name)
}
}
Log.d(FirebaseTAG, users.toString())
val spinnerAdaptor = ArrayAdapter<String>(this@PlayerDetails, android.R.layout.simple_spinner_item, users)
spinnerAdaptor.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
choose_user?.adapter = spinnerAdaptor
choose_user.onItemSelectedListener = this@PlayerDetails
}
val intent = getIntent()
numOfPlayers = intent.getIntExtra("number_of_players", 1)
next_details.setOnClickListener(this)
player_name.addTextChangedListener(this)
player_age.addTextChangedListener(this)
gender.setOnCheckedChangeListener(object: RadioGroup.OnCheckedChangeListener {
override fun onCheckedChanged(radiogroup: RadioGroup, checked: Int) {
if (fieldsArePopulated()) next_details.visibility = View.VISIBLE
}
})
}
override fun onItemSelected(parent: AdapterView<*>?, name: View?, position: Int, rowId: Long) {
val chosenName: String = parent?.getItemAtPosition(position).toString()
Log.d("ChosenName", chosenName)
Log.d("adapterclicked", "adapterclicked")
}
override fun onNothingSelected(parent: AdapterView<*>?) {
Log.d("Nothing", "NOTHINGCALLED")
}
...
知道是什么问题吗?
另外,当我在微调器中选择一个项目时,微调器旁边的视图也会移动,因此很明显它已被检测到,但onItemSelected()
仍未被调用。
我为users
MutableList设置了一个初始值:
var users: MutableList<String> = mutableListOf("Choose User")
现在onItemSelected()
被成功调用。
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