2017-12-21 6 views
-2

문제가있는 줄은 counter.getTag().toString();입니다. 나는 그것을 문자열에 넣어 다음 tappedCounter에 전달하려고했지만 여전히 내 응용 프로그램이 충돌합니다.ImageView를 누르면 응용 프로그램이 충돌합니다.

누군가가이 문제를 해결할 때 Android Studio의 logcat을 사용하여 자신을 알아내는 데 도움이된다면 도움이 될 것입니다. 여기

는 로그 캣입니다 : -

12-22 02:09:59.790 14251-14251/com.example.msq.practice E/AndroidRuntime: FATAL EXCEPTION: main 
                      Process: com.example.msq.practice, PID: 14251 
                      java.lang.IllegalStateException: Could not execute method for android:onClick 
                       at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293) 
                       at android.view.View.performClick(View.java:6256) 
                       at android.view.View$PerformClick.run(View.java:24701) 
                       at android.os.Handler.handleCallback(Handler.java:789) 
                       at android.os.Handler.dispatchMessage(Handler.java:98) 
                       at android.os.Looper.loop(Looper.java:164) 
                       at android.app.ActivityThread.main(ActivityThread.java:6541) 
                       at java.lang.reflect.Method.invoke(Native Method) 
                       at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 
                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) 
                      Caused by: java.lang.reflect.InvocationTargetException 
                       at java.lang.reflect.Method.invoke(Native Method) 
                       at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) 
                       at android.view.View.performClick(View.java:6256) 
                       at android.view.View$PerformClick.run(View.java:24701) 
                       at android.os.Handler.handleCallback(Handler.java:789) 
                       at android.os.Handler.dispatchMessage(Handler.java:98) 
                       at android.os.Looper.loop(Looper.java:164) 
                       at android.app.ActivityThread.main(ActivityThread.java:6541) 
                       at java.lang.reflect.Method.invoke(Native Method) 
                       at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 
                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) 
                      Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference 
                       at com.example.msq.practice.MainActivity.click(MainActivity.java:27) 
                       at java.lang.reflect.Method.invoke(Native Method) 
                       at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) 
                       at android.view.View.performClick(View.java:6256) 
                       at android.view.View$PerformClick.run(View.java:24701) 
                       at android.os.Handler.handleCallback(Handler.java:789) 
                       at android.os.Handler.dispatchMessage(Handler.java:98) 
                       at android.os.Looper.loop(Looper.java:164) 
                       at android.app.ActivityThread.main(ActivityThread.java:6541) 
                       at java.lang.reflect.Method.invoke(Native Method) 
                       at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 
                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) 

MainActivity : -

package com.example.msq.practice; 

    import android.support.v7.app.AppCompatActivity; 
    import android.os.Bundle; 
    import android.widget.ImageView; 
    import android.view.View; 

    public class MainActivity extends AppCompatActivity { 

     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_main); 
     } 

     int activePlayer = 0; 
     int[] gameState = {2,2,2,2,2,2,2,2,2}; 
     int[][] winningPositions = {{1,2,3}, {4,5,6}, {7,8,9}, {0,3,6},     
     {1,4,7,}, {2,5,8}, {0,4,8}, {2,4,6}}; 
     boolean isGameActive = true; 
     String result; 
     String tag; 

     public void click(View view){ 

      ImageView counter = (ImageView) view; 

      tag = counter.getTag().toString(); 

      int tappedCounter = Integer.parseInt(tag); 

      if(gameState[tappedCounter] == 2 && isGameActive == true){ 

       counter.setTranslationY(-5000f); 

       gameState[tappedCounter] = activePlayer; 
       if(activePlayer == 0){ 
        counter.setImageResource(R.drawable.circle); 
        activePlayer = 1; 
       } 
       else{ 
        counter.setImageResource(R.drawable.cross); 
        activePlayer = 0; 
       } 



counter.animate().rotation(360f).translationYBy(5000f).setDuration(1000); 

    } 

    for(int[] winningPosition : winningPositions){ 

     if(gameState[winningPosition[0]] == gameState[winningPosition[1]] && 
       gameState[winningPosition[1]] == gameState[winningPosition[2]] && 
       gameState[winningPosition[0]] != 2){ 

      isGameActive = false; 

      if(gameState[winningPosition[0]]==0){ 
       result = "PLayer 1 Won !"; 
      } 
      else{ 
       result = "PLayer 2 Won !"; 
      } 

     } 
     else{ 

      boolean isGameOver = true; 
      for(int counterState : gameState){ 
       if(counterState == 2) isGameOver = false; 
      } 

      if(isGameOver) 
       result = "It's a Draw"; 

     } 
    } 
} 

    } 

activity_main.xml 파일 : -

<?xml version="1.0" encoding="utf-8"?> 
    <android.support.constraint.ConstraintLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    tools:context="com.example.msq.practice.MainActivity"> 



     <GridLayout 


     android:id="@+id/gLayout" 
     android:layout_width="300dp" 
     android:layout_height="300dp" 
     android:layout_centerHorizontal="true" 
     android:layout_centerVertical="true" 
     android:layout_marginBottom="106dp" 
     android:layout_marginEnd="42dp" 
     android:layout_marginStart="42dp" 
     android:layout_marginTop="105dp" 
     android:background="@drawable/board" 
     android:columnCount="3" 
     app:layout_constraintBottom_toBottomOf="parent" 
     app:layout_constraintEnd_toEndOf="parent" 
     app:layout_constraintStart_toStartOf="parent" 
     app:layout_constraintTop_toTopOf="parent" 
     tools:rowCount="3"> 

     <ImageView 
      android:id="@+id/imageView0" 
      android:layout_width="80dp" 
      android:layout_height="80dp" 
      android:layout_column="0" 
      android:layout_marginStart="10dp" 
      android:layout_marginTop="10dp" 
      android:layout_row="0" 
      android:contentDescription="@string/cross" 
      android:onClick="click" /> 

     <ImageView 
      android:id="@+id/imageView1" 
      android:layout_width="80dp" 
      android:layout_height="80dp" 
      android:layout_column="1" 
      android:layout_marginStart="20dp" 
      android:layout_marginTop="10dp" 
      android:layout_row="0" 
      android:contentDescription="@string/cross" 
      android:onClick="click" /> 

     <ImageView 
      android:id="@+id/imageView3" 
      android:layout_width="80dp" 
      android:layout_height="80dp" 
      android:layout_column="0" 
      android:layout_marginStart="10dp" 
      android:layout_marginTop="22dp" 
      android:layout_row="1" 
      android:contentDescription="@string/cross" 
      android:onClick="click" /> 

     <ImageView 
      android:id="@+id/imageView4" 
      android:layout_width="80dp" 
      android:layout_height="80dp" 
      android:layout_column="1" 
      android:layout_marginStart="20dp" 
      android:layout_marginTop="22dp" 
      android:layout_row="1" 
      android:contentDescription="@string/cross" 
      android:onClick="click" /> 

     <ImageView 
      android:id="@+id/imageView5" 
      android:layout_width="80dp" 
      android:layout_height="80dp" 
      android:layout_column="2" 
      android:layout_marginStart="20dp" 
      android:layout_marginTop="22dp" 
      android:layout_row="1" 
      android:contentDescription="@string/cross" 
      android:onClick="click"/> 

     <ImageView 
      android:id="@+id/imageView7" 
      android:layout_width="80dp" 
      android:layout_height="80dp" 
      android:layout_column="1" 
      android:layout_marginStart="20dp" 
      android:layout_marginTop="22dp" 
      android:layout_row="2" 
      android:contentDescription="@string/cross" 
      android:onClick="click" /> 

     <ImageView 
      android:id="@+id/imageView8" 
      android:layout_width="80dp" 
      android:layout_height="80dp" 
      android:layout_column="2" 
      android:layout_marginStart="20dp" 
      android:layout_marginTop="22dp" 
      android:layout_row="2" 
      android:contentDescription="@string/cross" 
      android:onClick="click" /> 

     <ImageView 
      android:id="@+id/imageView6" 
      android:layout_width="80dp" 
      android:layout_height="80dp" 
      android:layout_column="0" 
      android:layout_marginStart="10dp" 
      android:layout_marginTop="22dp" 
      android:layout_row="2" 
      android:contentDescription="@string/cross" 
      android:onClick="click" /> 

     <ImageView 
      android:id="@+id/imageView2" 
      android:layout_width="80dp" 
      android:layout_height="80dp" 
      android:layout_column="2" 
      android:layout_marginStart="22dp" 
      android:layout_marginTop="10dp" 
      android:layout_row="0" 
      android:contentDescription="@string/cross" 
      android:onClick="click"/> 


    </GridLayout> 
</android.support.constraint.ConstraintLayout> 
+0

두 답변이 모두 올바른 것으로 보입니다. 그들이 당신을 위해 일하지 않는다면 이유를 설명하십시오. –

답변

-1

당신은 어디에서나 태그를 설정하지 않습니다 응용 프로그램 또는 xml. 그래서 getTag는 null을 리턴 할 것이다. 보기에 태그가 있으면보기를 추가해야합니다.

-1

발생 원인 : logcat의 일부가 충돌의 원인을 식별합니다. logcat을주의 깊게 읽으면 충돌의 마지막 원인은 NullPointerException입니다.

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference

이제 getTag()를 사용하여 태그의 값을 얻기 위해 노력하고있다,하지만 당신은 XML 레이아웃의 ImageView의에 어떤 태그를 설정하지 않았습니다. 따라서 toString이 호출 될 때 태그는 null 예외를 던집니다.

+0

ohk 지금은, 감사합니다 –

+0

마인드가 올바른 답변으로 표시되어 다른 사람이 유익 할 수 있습니까? @ Msq-9 –

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