TextView中的整數值不會更新; onClickListener將不會運行代碼

Question

無論我爲此分配編輯或更改爲Java代碼多少，它都拒絕正確更新爲結果設置的整數變量的值。有人能告訴我我在這裏失蹤的是什麼嗎？以下是我的代碼： package com.example.minicalc;

import com.example.minicalc.R; 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.KeyEvent; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.inputmethod.EditorInfo; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.Spinner; 
import android.widget.TextView; 
import android.widget.TextView.OnEditorActionListener; 
import android.content.SharedPreferences; 
import android.content.SharedPreferences.Editor; 
import android.util.Log; 

public class MainActivity extends Activity implements OnEditorActionListener { 
    private static final String TAG = "MiniCalc"; 
    private SharedPreferences savedValues; 

    private EditText editText1; 
    private EditText editText2; 
    private Button button1; 
    private Spinner spinner1; 
    private TextView answerLbl; 
    private int ivalue1 = 0; 
    private int ivalue2 = 0; 
    private int ianswer; 
    private int spinChoice; 
    //private String[] spinner_strings = {"+", "-", "×", "÷"}; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     Log.d(TAG, "onCreate event started"); 
     setContentView(R.layout.activity_main); 

     spinner1 = (Spinner) findViewById(R.id.spinner1); 
     button1 = (Button) findViewById(R.id.button1); 
     answerLbl = (TextView) findViewById(R.id.answerTxt); 
     editText1 = (EditText) findViewById(R.id.editText1); 
     editText2 = (EditText) findViewById(R.id.editText2); 

     editText1.setOnEditorActionListener(this); 
     editText2.setOnEditorActionListener(this); 

     savedValues = getSharedPreferences("SavedValues", MODE_PRIVATE); 

     spinChoice = spinner1.getSelectedItemPosition(); 

     button1.setOnClickListener(new OnClickListener() { 
      public void onClick(View arg0) { 
       Log.d(TAG, "onClick event started"); 
       ianswer = 0; 
       if (spinChoice == 0) { 
        ianswer = ivalue1 + ivalue2; 
        Log.d(TAG, "ianswer VALUE IS: " + Integer.valueOf(ianswer).toString()); 
       } else if (spinChoice == 1) { 
        ianswer = ivalue1 - ivalue2; 
        Log.d(TAG, "ianswer VALUE IS: " + Integer.valueOf(ianswer).toString()); 
       } else if (spinChoice == 2) { 
        ianswer = ivalue1 * ivalue2; 
        Log.d(TAG, "ianswer VALUE IS: " + Integer.valueOf(ianswer).toString()); 
       } else if (spinChoice == 3) { 
        ianswer = ivalue1/ivalue2; 
        Log.d(TAG, "ianswer VALUE IS: " + Integer.valueOf(ianswer).toString()); 
       } 
       answerLbl.setText(Integer.toString(ianswer)); 
       //answerLbl.setText(""+ianswer); 
       Log.d(TAG, "answerLbl TEXT IS: " + answerLbl.getText()); 
      } 
     }); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.main, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 
     if (id == R.id.action_settings) { 
      return true; 
     } 
     return super.onOptionsItemSelected(item); 
    } 

    @Override 
    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) { 
     Log.d(TAG, "onEditorAction event started"); 
     if (actionId == EditorInfo.IME_ACTION_DONE || actionId == EditorInfo.IME_ACTION_UNSPECIFIED) { 
      ivalue1 = Integer.parseInt(editText1.getText().toString()); 
      ivalue2 = Integer.parseInt(editText2.getText().toString()); 
     } 
     return false; 
    } 

    @Override 
    public void onPause() { 
     Log.d(TAG, "onPause event started"); 
     Editor editor = savedValues.edit(); 
     editor.putString("value1", editText1.getText().toString()); 
     editor.putString("value2", editText2.getText().toString()); 

     editor.commit(); 
     super.onPause(); 
    } 

    @Override 
    public void onResume() { 
     super.onResume(); 
     Log.d(TAG, "onResume event started"); 
     editText1.setText(savedValues.getString("value1", "")); 
     editText2.setText(savedValues.getString("value2", "")); 
    } 
} 

這裏是我的佈局XML，activity_main.xml中：

<?xml version="1.0" encoding="UTF-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    tools:context="com.example.minicalc.MainActivity" > 
    <TextView 
     android:id="@+id/valLbl1" 
     android:labelFor="@+id/editText1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentStart="true" 
     android:layout_alignParentTop="true" 
     android:layout_marginStart="30dp" 
     android:layout_marginTop="40dp" 
     android:text="@string/valueLbl1" /> 
    <TextView 
     android:id="@+id/valLbl2" 
     android:labelFor="@+id/editText2" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignStart="@+id/valLbl1" 
     android:layout_below="@+id/editText1" 
     android:layout_marginTop="24dp" 
     android:text="@string/valueLbl2" /> 
    <EditText 
     android:id="@+id/editText1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignStart="@+id/valLbl1" 
     android:layout_below="@+id/valLbl1" 
     android:layout_marginTop="20dp" 
     android:ems="5" 
     android:inputType="number"> 
     <requestFocus /> 
    </EditText> 
    <EditText 
     android:id="@+id/editText2" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignStart="@+id/valLbl2" 
     android:layout_below="@+id/valLbl2" 
     android:layout_marginTop="16dp" 
     android:ems="5" 
     android:inputType="number" /> 
    <TextView 
     android:id="@+id/answerTxt" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignTop="@+id/answerLblTxt" 
     android:layout_centerHorizontal="true" 
     android:ems="7"/> 
    <Button 
     android:id="@+id/button1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_below="@+id/editText2" 
     android:layout_centerHorizontal="true" 
     android:layout_marginTop="18dp" 
     android:text="@string/submit" /> 
    <TextView 
     android:id="@+id/answerLblTxt" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignStart="@+id/editText2" 
     android:layout_below="@+id/button1" 
     android:layout_marginTop="16dp" 
     android:text="@string/answerLbl" /> 
    <Spinner 
     android:id="@+id/spinner1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignTop="@+id/valLbl2" 
     android:layout_marginStart="28dp" 
     android:layout_toEndOf="@+id/editText2" 
     android:entries="@array/spinner_strings" /> 
</RelativeLayout> 

現在，應用程序運行正常，在logcat的消息顯示了罰款...除非我把它們放在onClickListener。所以是的，我已經發現問題在哪裏，我只是不知道問題在哪。我會顯示錯誤的屏幕截圖，但這是我第一次發佈。無論如何，我正在運行該應用的手機是運行Android 4.4.4的三星Galaxy Note 3。誰能幫我？

Answer 1

您的紡織商getSelectedItemPoisition()方法僅在您的onCreate()方法中調用一次，並且每次單擊該按鈕時都不會調用該方法，從而導致該值永不更新。需要在onClick()方法會導致新的價值要在按鈕點擊閱讀添加

button1.setOnClickListener(new OnClickListener() { 
    public void onClick(View arg0) { 

     spinChoice = spinner1.getSelectedItemPosition(); 

     ... 
    } 

這行代碼。