我正在尝试在android studio（java）中创建一个应用程序，但我的复选框有一点问题。每次当我取消选中该复选框时，我的应用程序都会崩溃。我们的意图是，当选中一个复选框时，整数存储在一个arraylist中，一个随机数发生器从数组中选择一个整数并显示它。谁能告诉我我做错了什么。
.java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>
.XML文件
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)
错误日志
Sub find_cell()
Dim find_cell As Range
Set ws = Sheets("TempList3")
stop_loop = False
Do Until stop_loop = True
Set find_cell = ws.Cells.Find(What:=Sheets("Sheet1").ComboBox2.Value, LookAt:=xlWhole)
If Not find_cell Is Nothing Then
ws.Rows(find_cell.Row).EntireRow.Delete
Else
stop_loop = True
End If
Loop
End Sub
答案 0 :(得分：0)
您应该仔细查看例外java.lang.IndexOutOfBoundsException: Invalid index 2, size is 1
意味着在max index为1时尝试使用索引2。
Arraylist index以0开头，您的ID为1，因此您需要按ID-1删除，代码
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;
}
}
}