Skip to main content
 首页 » 编程设计

java之为什么我的应用程序崩溃(复选框)

2025年05月04日17xing901022

我正在尝试在android studio（java）中制作一个应用，但是我的复选框有一个小问题。每当我取消选中该复选框时，我的应用都会崩溃。这样做的意图是，当选中一个复选框时，该整数将存储在arraylist中，并且随机化器会从数组中选择这些整数之一并显示出来。有人可以告诉我我在做什么错。

.java文件

package com.developer.sven.dartworkout20; 
 
import android.content.Intent; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.View; 
import android.widget.CheckBox; 
 
import java.util.ArrayList; 
 
public class PreferenceDartThrow extends AppCompatActivity { 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.preference_dart_throw_page); 
 
    Intent preferenceDartThrowPageOpened = getIntent(); 
    String previousActivity = preferenceDartThrowPageOpened.getExtras().getString("Pref"); 
} 
 
ArrayList<Integer> selection = new ArrayList<Integer>(); 
 
public void selectNumber(View view) { 
    boolean numberChecked = ((CheckBox) view).isChecked(); 
    switch (view.getId()) { 
        case R.id.number_D1: 
            if (numberChecked) { 
                selection.add(1); 
            } else { 
                selection.remove(1); 
            } 
            break; 
 
        case R.id.number_D2: 
            if (numberChecked) { 
                selection.add(2); 
            } else { 
                selection.remove(2); 
            } 
            break; 
 
        case R.id.number_D3: 
            if (numberChecked) { 
                selection.add(3); 
            } else { 
                selection.remove(3); 
            } 
            break; 
 
        case R.id.number_D4: 
            if (numberChecked) { 
                selection.add(4); 
            } else { 
                selection.remove(4); 
            } 
            break; 
 
        case R.id.number_D5: 
            if (numberChecked) { 
                selection.add(5); 
            } else { 
                selection.remove(5); 
            } 
            break; 
  } 
} 
}


.XML文件 

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"> 
 
<CheckBox 
        android:layout_width="wrap_content" 
        android:layout_height="21dp" 
        android:id="@+id/number_D1" 
        android:onClick="selectNumber" 
        android:layout_below="@+id/text_double" 
        android:layout_centerHorizontal="true" 
        android:checked="false" /> 
 
 
    <CheckBox 
        android:layout_width="wrap_content" 
        android:layout_height="21dp" 
        android:id="@+id/number_D2" 
        android:onClick="selectNumber" 
        android:layout_below="@+id/number_D1" 
        android:layout_centerHorizontal="true" 
        android:checked="false" 
        android:visibility="visible" /> 
 
 
    <CheckBox 
        android:layout_width="wrap_content" 
        android:layout_height="21dp" 
        android:id="@+id/number_D3" 
        android:onClick="selectNumber" 
        android:layout_below="@+id/number_D2" 
        android:checked="false" 
        android:layout_centerHorizontal="true" 
        android:visibility="visible" /> 
 
    <CheckBox 
        android:layout_width="wrap_content" 
        android:layout_height="21dp" 
        android:id="@+id/number_D4" 
        android:onClick="selectNumber" 
        android:layout_below="@+id/number_D3" 
        android:checked="false" 
        android:layout_centerHorizontal="true" 
        android:visibility="visible" /> 
 
    <CheckBox 
        android:layout_width="wrap_content" 
        android:layout_height="21dp" 
        android:onClick="selectNumber" 
        android:layout_below="@+id/number_D4" 
        android:checked="false" 
        android:layout_centerHorizontal="true" 
        android:id="@+id/number_D5" 
        android:visibility="visible" /> 
</RelativeLayout>


错误日志 

    02-27 14:15:33.540 1024-1024/com.developer.sven.dartworkout20 E/AndroidRuntime: FATAL EXCEPTION: main 
                                                                                    Process: com.developer.sven.dartworkout20, PID: 1024 
                                                                                    java.lang.IllegalStateException: Could not execute method for android:onClick 
                                                                                        at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:275) 
                                                                                        at android.view.View.performClick(View.java:4438) 
                                                                                        at android.widget.CompoundButton.performClick(CompoundButton.java:100) 
                                                                                        at android.view.View$PerformClick.run(View.java:18422) 
                                                                                        at android.os.Handler.handleCallback(Handler.java:733) 
                                                                                        at android.os.Handler.dispatchMessage(Handler.java:95) 
                                                                                        at android.os.Looper.loop(Looper.java:136) 
                                                                                        at android.app.ActivityThread.main(ActivityThread.java:5017) 
                                                                                        at java.lang.reflect.Method.invokeNative(Native Method) 
                                                                                        at java.lang.reflect.Method.invoke(Method.java:515) 
                                                                                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
                                                                                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
                                                                                        at dalvik.system.NativeStart.main(Native Method) 
                                                                                     Caused by: java.lang.reflect.InvocationTargetException 
                                                                                        at java.lang.reflect.Method.invokeNative(Native Method) 
                                                                                        at java.lang.reflect.Method.invoke(Method.java:515) 
                                                                                        at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:270) 
                                                                                        at android.view.View.performClick(View.java:4438)  
                                                                                        at android.widget.CompoundButton.performClick(CompoundButton.java:100)  
                                                                                        at android.view.View$PerformClick.run(View.java:18422)  
                                                                                        at android.os.Handler.handleCallback(Handler.java:733)  
                                                                                        at android.os.Handler.dispatchMessage(Handler.java:95)  
                                                                                        at android.os.Looper.loop(Looper.java:136)  
                                                                                        at android.app.ActivityThread.main(ActivityThread.java:5017)  
                                                                                        at java.lang.reflect.Method.invokeNative(Native Method)  
                                                                                        at java.lang.reflect.Method.invoke(Method.java:515)  
                                                                                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)  
                                                                                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)  
                                                                                        at dalvik.system.NativeStart.main(Native Method)  
                                                                                     Caused by: java.lang.IndexOutOfBoundsException: Invalid index 2, size is 1 
                                                                                        at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255) 
                                                                                        at java.util.ArrayList.remove(ArrayList.java:403) 
                                                                                        at com.developer.sven.dartworkout20.PreferenceDartThrow.selectNumber(PreferenceDartThrow.java:38) 
                                                                                        at java.lang.reflect.Method.invokeNative(Native Method)  
                                                                                        at java.lang.reflect.Method.invoke(Method.java:515)  
                                                                                        at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:270)  
                                                                                        at android.view.View.performClick(View.java:4438)  
                                                                                        at android.widget.CompoundButton.performClick(CompoundButton.java:100)  
                                                                                        at android.view.View$PerformClick.run(View.java:18422)  
                                                                                        at android.os.Handler.handleCallback(Handler.java:733)  
                                                                                        at android.os.Handler.dispatchMessage(Handler.java:95)  
                                                                                        at android.os.Looper.loop(Looper.java:136)  
                                                                                        at android.app.ActivityThread.main(ActivityThread.java:5017)  
                                                                                        at java.lang.reflect.Method.invokeNative(Native Method)  
                                                                                        at java.lang.reflect.Method.invoke(Method.java:515)  
                                                                                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)  
                                                                                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)  
                                                                                        at dalvik.system.NativeStart.main(Native Method) 

请您参考如下方法:

您应该仔细查看异常java.lang.IndexOutOfBoundsException: Invalid index 2, size is 1

这意味着您尝试在最大索引为1时使用索引2。

Arraylist索引以0开头，您的ID以1开头，因此您需要通过ID-1（代码）删除

public void selectNumber(View view) { 
    boolean numberChecked = ((CheckBox) view).isChecked(); 
    switch (view.getId()) { 
        case R.id.number_D1: 
            if (numberChecked) { 
                selection.add(1); 
            } else { 
                selection.remove(0); 
            } 
            break; 
 
        case R.id.number_D2: 
            if (numberChecked) { 
                selection.add(2); 
            } else { 
                selection.remove(1); 
            } 
            break; 
 
        case R.id.number_D3: 
            if (numberChecked) { 
                selection.add(3); 
            } else { 
                selection.remove(2); 
            } 
            break; 
 
        case R.id.number_D4: 
            if (numberChecked) { 
                selection.add(4); 
            } else { 
                selection.remove(3); 
            } 
            break; 
 
        case R.id.number_D5: 
            if (numberChecked) { 
                selection.add(5); 
            } else { 
                selection.remove(4); 
            } 
            break; 
  } 
} 
}


  文章来源：
  https://www.itguest.com/post/ajjfjfi2b1.html
阅读延展