Я реализовал это пользовательское автозаполнение просмотра текста в своем приложении.Просто когда пользователь попытался набрать текст, приложение остановилось.Я проверил мой веб-API работает нормально.Я новичок в kotlin, поэтому я не знаю, как решить проблему.
Это мой пользовательский адаптер выглядит как
class AutoCompleteAdapter(context: Context, resource: Int) : ArrayAdapter<String>(context, resource), Filterable {
private val mlistData: ArrayList<String>
init {
mlistData = ArrayList()
}
fun setData(list: ArrayList<String>) {
mlistData.clear()
mlistData.addAll(list)
}
override fun getCount(): Int {
return mlistData.size
}
override fun getItem(position: Int): String? {
return mlistData[position]
}
/**
* Used to Return the full object directly from adapter.
*
* @param position
* @return
*/
fun getObject(position: Int): String {
return mlistData[position]
}
override fun getFilter(): Filter {
return object : Filter() {
override fun performFiltering(constraint: CharSequence?): FilterResults {
val filterResults = FilterResults()
if (constraint != null) {
filterResults.values = mlistData
filterResults.count = mlistData.size
}
return filterResults
}
override fun publishResults(constraint: CharSequence, results: FilterResults?) {
if (results != null && results.count > 0) {
notifyDataSetChanged()
} else {
notifyDataSetInvalidated()
}
}
}
}
}
Это код, где я использую autocompleteTextView
class RegistrationInformationActivity : AppCompatActivity(), AdapterView.OnItemSelectedListener {
private lateinit var autoCompleteAdapter: AutoCompleteAdapter
lateinit var handler: Handler
private val TRIGGER_AUTO_COMPLETE = 100
private val AUTO_COMPLETE_DELAY: Long = 300
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_registration_information)
autoCompleteAdapter = AutoCompleteAdapter(this, android.R.layout.simple_dropdown_item_1line)
register_provinsi.threshold = 2
register_provinsi.setAdapter(autoCompleteAdapter)
register_provinsi.setOnItemClickListener{ parent, view, position, id ->
val result = autoCompleteAdapter.getObject(position)
register_provinsi.setText(result)
}
register_provinsi.addTextChangedListener(object : TextWatcher {
override fun beforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int) {}
override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {
handler.removeMessages(TRIGGER_AUTO_COMPLETE)
handler.sendEmptyMessageDelayed(
TRIGGER_AUTO_COMPLETE,
AUTO_COMPLETE_DELAY
)
}
override fun afterTextChanged(s: Editable) {}
})
handler = Handler(Handler.Callback { msg ->
if (msg.what == TRIGGER_AUTO_COMPLETE) {
if (!TextUtils.isEmpty(register_provinsi.text))
val string = register_provinsi.text.toString()
loadProvinsi(string)
}
}
false
})
}
В этом месте я выполняю вызов веб-API с использованием залпа
private fun loadProvinsi(provinsi: String) {
val stringRequest = StringRequest(
Request.Method.GET, EndPoints.URL_GET_PROVINSI + "&keyword=" + provinsi,
Response.Listener<String> { s ->
try {
val obj = JSONObject(s)
val list = ArrayList<String>()
if (!obj.equals("")) {
val array = obj.getJSONArray("list")
for (i in 0 until array.length() - 1) {
val objectProvinsi = array.getJSONObject(i)
objectProvinsi.getString("value")
list.add(objectProvinsi.getString("value"))
}
} else {
Toast.makeText(applicationContext, obj.getString("message"), Toast.LENGTH_LONG).show()
}
autoCompleteAdapter.setData(list)
autoCompleteAdapter.notifyDataSetChanged()
} catch (e: JSONException) {
e.printStackTrace()
}
},
Response.ErrorListener { volleyError ->
Toast.makeText(applicationContext, volleyError.message, Toast.LENGTH_LONG).show()
})
val requestQueue = Volley.newRequestQueue(this)
requestQueue.add<String>(stringRequest)
}
Я уже реализовал методы из AdapterView.OnItemSelectedListener.Вход в приложение всегда
E/UncaughtException: java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull, parameter constraint
at com.example.bookingonline.model.AutoCompleteAdapter$getFilter$1.publishResults(AutoCompleteAdapter.kt)
at android.widget.Filter$ResultsHandler.handleMessage(Filter.java:282)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5942)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.bookingonline, PID: 16925
java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull, parameter constraint
at com.example.bookingonline.model.AutoCompleteAdapter$getFilter$1.publishResults(AutoCompleteAdapter.kt)
at android.widget.Filter$ResultsHandler.handleMessage(Filter.java:282)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5942)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)