간단한 퀴즈 .... java.lang.NullPointerExeption 오류

Question

질문과 대답이있는 .txt 파일을 사용하여 JSON으로 간단한 퀴즈를 만들려고합니다. 그것은 나를 위해 그렇게 간단하지 않습니다. 평가판 txt 파일에는 23 개의 질문 만 있습니다. 어쨌든 오류가 발생합니다 : Kviz 클래스의 65 번째 줄에 java.lang.NullPointerExeption이 있습니다. 바로 "newGame();"입니다. . 여기에 Kviz.java에 대한 코드 : 여기

package rs.androidaplikacijekvizopstekulture; 

import java.io.IOException; 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.Window; 
import android.view.WindowManager; 
import android.widget.Button; 
import android.widget.TextView; 

public class Kviz extends Activity implements View.OnClickListener{ 

    Button bIzlazIzKviza, bOdgovor1, bOdgovor2, bOdgovor3, bOdgovor4; 
    TextView question; 
    kvizData kvizData = null; 
    boolean mWait = false; 

    private void newGame(){ 
     try { 
     if(this.kvizData == null) 
      this.kvizData = new kvizData(); 
      this.kvizData.randomQuestion(); 
      this.question.setText(this.kvizData.getQuestion()); 
      this.bOdgovor1.setText(this.kvizData.getAnswer()[0]); 
      this.bOdgovor2.setText(this.kvizData.getAnswer()[1]); 
      this.bOdgovor3.setText(this.kvizData.getAnswer()[2]); 
      this.bOdgovor4.setText(this.kvizData.getAnswer()[3]); 
      this.bOdgovor1.setEnabled(true); 
      this.bOdgovor2.setEnabled(true); 
      this.bOdgovor3.setEnabled(true); 
      this.bOdgovor4.setEnabled(true); 
      return; 
     } catch (IOException localIOException) { 
      while(true) 
      localIOException.printStackTrace(); 
     } 
    } 


    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 

     requestWindowFeature(Window.FEATURE_NO_TITLE); 
     getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); 

     setContentView(R.layout.kviz); 

     bIzlazIzKviza = (Button) findViewById(R.id.bIzlazIzKviza); 
     question = (TextView) findViewById(R.id.tvPitanje); 
     bOdgovor1 = (Button) findViewById(R.id.bOdgovor1); 
     bOdgovor2 = (Button) findViewById(R.id.bOdgovor2); 
     bOdgovor3 = (Button) findViewById(R.id.bOdgovor3); 
     bOdgovor4 = (Button) findViewById(R.id.bOdgovor4); 
     bOdgovor1.setOnClickListener(this); 
     bOdgovor2.setOnClickListener(this); 
     bOdgovor3.setOnClickListener(this); 
     bOdgovor4.setOnClickListener(this); 
      newGame(); 


     bIzlazIzKviza.setOnClickListener(new OnClickListener() { 

      public void onClick(View v) { 
       finish(); 

      } 
     }); 

    } 


    protected void onPause() { 
     // TODO Auto-generated method stub 
     super.onPause(); 
    } 

    public void onClick(View v) { 
     // TODO Auto-generated method stub 

    } 
} 

및 kvizData.java에 대한 코드입니다 : 당신의 kviz.xml 파일 ID와 Button이없는 것처럼

package rs.androidaplikacijekvizopstekulture; 

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import com.google.gson.JsonArray; 
import com.google.gson.JsonParser; 

public class kvizData { 
    static String resourceFile; 
     static int size = -1; 
     String[] answer = new String[4]; 
     String question; 
     int right; 

     public kvizData() 
     { 
     if (size < 0); 
     try 
     { 
      loadResource("/rs/androidaplikacije/kvizopstekulture/data/pitanja.txt"); 
      return; 
     } 
     catch (IOException localIOException) 
     { 
      while (true) 
      localIOException.printStackTrace(); 
     } 
     } 

     private void loadResource(String paramString) 
     throws IOException 
     { 
     resourceFile = paramString; 
     InputStream localInputStream = getClass().getResourceAsStream(paramString); 
     BufferedReader localBufferedReader = new BufferedReader(new InputStreamReader(localInputStream, "UTF-8")); 
     for (size = 0; ; size = 1 + size) 
     { 
      String str; 
      do 
      { 
      str = localBufferedReader.readLine(); 
      if (str == null) 
      { 
       localInputStream.close(); 
       return; 
      } 
      } 
      while ((str == null) || (str.trim().length() <= 0)); 
     } 
     } 

     public static void main(String[] paramArrayOfString) 
     throws IOException 
     { 
     kvizData localkvizData = new kvizData(); 
     localkvizData.loadResource("/rs/kvizopstekulture/data/pitanja.txt"); 
     for (int i = 0; ; i++) 
     { 
      if (i >= 23) 
      return; 
      localkvizData.randomQuestion(); 
      System.out.println(); 
     } 
     } 

     public String[] getAnswer() 
     { 
     return this.answer; 
     } 

     public String getQuestion() 
     { 
     return this.question; 
     } 

     public int getRight() 
     { 
     return this.right; 
     } 

     public void randomQuestion() 
     throws IOException 
     { 
     int i = (int)(Math.random() * size); 
     BufferedReader localBufferedReader = new BufferedReader(new InputStreamReader(getClass().getResourceAsStream(resourceFile), "UTF-8")); 
     int j = 0; 
     while (true) 
     { 
      String str = localBufferedReader.readLine(); 
      if (str == null) 
      return; 
      if ((str != null) && (str.trim().length() > 0)) 
      { 
      j++; 
      if (j == i) 
      { 
       System.out.println(str); 
       JsonArray localJsonArray = new JsonParser().parse(str).getAsJsonArray(); 
       this.question = localJsonArray.get(0).getAsString(); 
       System.out.println(this.question); 
       this.right = localJsonArray.get(1).getAsInt(); 
       this.answer[0] = localJsonArray.get(2).getAsString(); 
       this.answer[1] = localJsonArray.get(3).getAsString(); 
       this.answer[2] = localJsonArray.get(4).getAsString(); 
       this.answer[3] = localJsonArray.get(5).getAsString(); 
      } 
      } 
     } 
     } 

     public void setAnswer(String[] paramArrayOfString) 
     { 
     this.answer = paramArrayOfString; 
     } 

     public void setQuestion(String paramString) 
     { 
     this.question = paramString; 
     } 

     public void setRigth(int paramInt) 
     { 
     this.right = paramInt; 
     } 
} 

Answer 1

보인다는 bIzlazIzKviza

XML 레이아웃 파일에 <Button id="+@bIzlazIzKviza" .../>입니까?