在EditText上调用setText并不总是更改内容

Question

我试图通过调用输入上的setText方法来更改片段内的editText的值。但它并不总是有效：

• 有时当我从微调器值更改时，正常文本与edittext相关联，但有时候它不会更改其值
• 有时在设备旋转时，文本会更新，有时则不会 但是在所有情况下，当将新文本内容记录到Logcat中时，它是预期的字符串（新内容）。

这里是片段定义（使用kotlinX扩展来攻击小部件）

import android.os.Bundle
import android.support.v4.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.AdapterView
import android.widget.ArrayAdapter
import android.widget.Spinner
import com.loloof64.android.basicchessendgamestrainer.PositionGeneratorValuesHolder
import com.loloof64.android.basicchessendgamestrainer.R
import kotlinx.android.synthetic.main.fragment_editing_other_pieces_global_constraint.*
import java.lang.ref.WeakReference
import java.util.logging.Logger

class OtherPiecesGlobalConstraintEditorFragment : Fragment() {

    private var spinnerPiecesKindValues = listOf<PieceKind>()
    private var lastSpinnerSelectedItem : PieceKind? = null

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        return inflater.inflate(R.layout.fragment_editing_other_pieces_global_constraint, container, false)
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {




 generator_editor_spinner_other_piece_global_constraint.
 onItemSelectedListener =

OtherPiecesGlobalConstraintEditorSpinnerSelectionListener(this)





 generator_editor_field_other_piece_global_constraint.
 onFocusChangeListener =

    OtherPiecesGlobalConstraintEditorScriptFieldFocusListener(this)

        updatePieceKindsSpinnerAndLoadFirstScriptIfAny()
    }

    override fun onResume() {
        super.onResume()
        updatePieceKindsSpinnerAndLoadFirstScriptIfAny()
    }

    private fun updatePieceKindsSpinnerAndLoadFirstScriptIfAny() {
        loadSpinnerTitles()
        loadScriptMatchingSpinnerSelectionOrDisableAndClearField()
        if (scriptsByPieceKind.isNotEmpty()) {

generator_editor_spinner_other_piece_global_constraint.setSelection(0)
        }
    }

    companion object {
        fun newInstance(): OtherPiecesGlobalConstraintEditorFragment {
            return OtherPiecesGlobalConstraintEditorFragment()
        }

        fun deleteScriptAssociatedWithPieceKind(kind: PieceKind){
            scriptsByPieceKind.remove(kind)
        }

        val scriptsByPieceKind = mutableMapOf<PieceKind, String>()
    }

    private fun loadSpinnerTitles() {
        val pieceTypesStrings = resources.getStringArray(R.array.piece_type_spinner)
        val sideStrings = resources.getStringArray(R.array.player_computer_spinner)
        spinnerPiecesKindValues = 
PositionGeneratorValuesHolder.otherPiecesCount.map { it.pieceKind }
        val otherPiecesKinds = spinnerPiecesKindValues.map {
            "${pieceTypesStrings[it.pieceType.ordinal]} 
${sideStrings[it.side.ordinal]}"
        }.toTypedArray()

         val spinnerAdapter = ArrayAdapter<String>(activity, android.R.layout.simple_spinner_item, otherPiecesKinds)


          spinnerAdapter.
          setDropDownViewResource(
          android.R.layout.simple_spinner_dropdown_item)

        generator_editor_spinner_other_piece_global_constraint.adapter = spinnerAdapter

        setEmptyScriptsWheneverScriptMissingForASpinnerKey()
    }

    private fun setEmptyScriptsWheneverScriptMissingForASpinnerKey(){
        for (currentSpinnerKey in spinnerPiecesKindValues){
            if ( ! scriptsByPieceKind.containsKey(currentSpinnerKey) ) 
            {
                scriptsByPieceKind[currentSpinnerKey] = ""
            }
        }
    }

    fun loadScriptMatchingSpinnerSelectionOrDisableAndClearField(){
        if (spinnerPiecesKindValues.isEmpty()){

          generator_editor_field_other_piece_global_constraint.
          text.clear()

         generator_editor_field_other_piece_global_constraint.
         isEnabled = false
        }
        else {
            val selectedItemPosition = 
            generator_editor_spinner_other_piece_global_constraint.
                selectedItemPosition
            val selectedPieceKind = 
            spinnerPiecesKindValues[selectedItemPosition]
            val associatedScript = 
            scriptsByPieceKind[selectedPieceKind]

             generator_editor_field_other_piece_global_constraint.
             isEnabled = true

              //----------------------------------------//
             // Here is the strange editText behaviour //
             //----------------------------------------//
             generator_editor_field_other_piece_global_constraint.
             setText(associatedScript)

generator_editor_field_other_piece_global_constraint.postInvalidate()

            /////////////////////////////////////////////////
            Logger.getLogger("loloof64").info("selected piece kind : $selectedPieceKind")
            Logger.getLogger("loloof64").info("associated script : $associatedScript")
            Logger.getLogger("loloof64").info("current script field value : ${generator_editor_field_other_piece_global_constraint.text}")
            /////////////////////////////////////////////////
        }
    }

    fun retainCurrentScript() {
        if (lastSpinnerSelectedItem != null){
            scriptsByPieceKind[lastSpinnerSelectedItem!!] = 
            generator_editor_field_other_piece_global_constraint.
            text.toString()
        }
    }

    fun removeScriptFieldFocus() {

generator_editor_field_other_piece_global_constraint.clearFocus()
    }

    fun updateLastSelectedItem() {
        val spinnerSelectedItemPosition = 
        generator_editor_spinner_other_piece_global_constraint.
        selectedItemPosition
        lastSpinnerSelectedItem =
                if (spinnerSelectedItemPosition == Spinner.INVALID_POSITION) null
                else spinnerPiecesKindValues[spinnerSelectedItemPosition]
    }

 }

class OtherPiecesGlobalConstraintEditorSpinnerSelectionListener(parent: 
OtherPiecesGlobalConstraintEditorFragment):
        AdapterView.OnItemSelectedListener {
    override fun onNothingSelected(parent: AdapterView<*>?) {
        saveLastScriptAndSetToCurrent()
    }

    override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
        saveLastScriptAndSetToCurrent()
    }

    private fun saveLastScriptAndSetToCurrent(){
        parentRef.get()?.removeScriptFieldFocus()
        parentRef.get()?.updateLastSelectedItem()


        parentRef.get()?.
        loadScriptMatchingSpinnerSelectionOrDisableAndClearField()
    }

    private val parentRef = WeakReference(parent)
}

class OtherPiecesGlobalConstraintEditorScriptFieldFocusListener(parent: 
OtherPiecesGlobalConstraintEditorFragment):
    View.OnFocusChangeListener
{
    override fun onFocusChange(v: View?, hasFocus: Boolean) {
        if (!hasFocus){
            parentRef.get()?.retainCurrentScript()
        }
    }

    private val parentRef = WeakReference(parent)
}