Brtdku

In app, I allocate resources to button in GridLayout.

if(fill[tappedButtonLocation] == 2 && !gameOver) {

            fill[tappedButtonLocation] = activePlayer;

            if (activePlayer == 0) {

                tappedButton.setBackgroundResource(R.drawable.circle_yellow);

                activePlayer = 1;

            } else {

                tappedButton.setBackgroundResource(R.drawable.circle_yelp);

                activePlayer = 0;

            }

        }

Then I want to remove the resources but it crash the app.

    GridLayout gridLayout = findViewById(R.id.gridLayout);

    for(int i=0; i<gridLayout.getChildCount();i++){

        ((Button) gridLayout.getChildAt(i)).setBackgroundResource(0);

    }

Allocated resource is

<shape xmlns:android="http://schemas.android.com/apk/res/android"

    android:shape="oval">

    <solid android:color="#FFFC00"> </solid>

    <size android:height="120dp"

        android:width="120dp"> </size>

</shape>

Logcat Error:

java.lang.IllegalStateException: Could not execute method for android:onClick

        at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:390)

        at android.view.View.performClick(View.java:6597)

        at android.view.View.performClickInternal(View.java:6574)

        at android.view.View.access$3100(View.java:778)

        at android.view.View$PerformClick.run(View.java:25885)

        at android.os.Handler.handleCallback(Handler.java:873)

        at android.os.Handler.dispatchMessage(Handler.java:99)

        at android.os.Looper.loop(Looper.java:193)

        at android.app.ActivityThread.main(ActivityThread.java:6669)

        at java.lang.reflect.Method.invoke(Native Method)

        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)

        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

     Caused by: java.lang.reflect.InvocationTargetException

        at java.lang.reflect.Method.invoke(Native Method)

        at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:385)

        at android.view.View.performClick(View.java:6597) 

        at android.view.View.performClickInternal(View.java:6574) 

        at android.view.View.access$3100(View.java:778) 

        at android.view.View$PerformClick.run(View.java:25885) 

        at android.os.Handler.handleCallback(Handler.java:873) 

        at android.os.Handler.dispatchMessage(Handler.java:99) 

        at android.os.Looper.loop(Looper.java:193) 

        at android.app.ActivityThread.main(ActivityThread.java:6669) 

        at java.lang.reflect.Method.invoke(Native Method) 

        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 

        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) 

     Caused by: java.lang.ClassCastException: android.support.v7.widget.GridLayout cannot be cast to android.widget.GridLayout

        at com.example.tictokgame.MainActivity.playAgain(MainActivity.java:65)

        at java.lang.reflect.Method.invoke(Native Method) 

        at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:385) 

        at android.view.View.performClick(View.java:6597) 

        at android.view.View.performClickInternal(View.java:6574) 

        at android.view.View.access$3100(View.java:778) 

        at android.view.View$PerformClick.run(View.java:25885) 

        at android.os.Handler.handleCallback(Handler.java:873) 

        at android.os.Handler.dispatchMessage(Handler.java:99) 

        at android.os.Looper.loop(Looper.java:193) 

        at android.app.ActivityThread.main(ActivityThread.java:6669) 

        at java.lang.reflect.Method.invoke(Native Method) 

        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 

        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) 

How can I remove the resource from GridView.
Actually I want to reset the tic-toc-toe game after clicking on play again button.

The problem seems to be a ClassCastException as noted in the stacktrace:

Caused by: java.lang.ClassCastException: android.support.v7.widget.GridLayout cannot be cast to android.widget.GridLayout

Please check your imports in the class, where you do the following:

GridLayout gridLayout = findViewById(R.id.gridLayout);

Change this:

import android.widget.GridLayout;

to:

import android.support.v7.widget.GridLayout;