length=0; index=-1 at java.util.ArrayList.get(ArrayList.java:439) at io.legado.a...
🚨 错误信息
java.lang.ArrayIndexOutOfBoundsException: length=0; index=-1
at java.util.ArrayList.get(ArrayList.java:439)
at io.legado.app.ui.book.read.page.entities.TextChapter.getReadLength(SourceFile:17)
at li.v0.A(SourceFile:5)
at mj.c2.onStopTrackingTouch(SourceFile:51)
at android.widget.SeekBar.onStopTrackingTouch(SeekBar.java:181)
at android.widget.AbsSeekBar.onTouchEvent(AbsSeekBar.java:931)
at android.view.View.dispatchTouchEvent(View.java:13699)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3249)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2938)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3249)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2938)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3249)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2938)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3249)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2938)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3249)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2938)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3249)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2938)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3249)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2938)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3249)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2938)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3249)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2938)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3249)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2938)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3249)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2938)
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:741)
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:2013)
at android.app.Activity.dispatchTouchEvent(Activity.java:4180)
at dh.a.dispatchTouchEvent(SourceFile:6)
at j.a0.dispatchTouchEvent(SourceFile:3)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:687)
at android.view.View.dispatchPointerEvent(View.java:13962)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:6420)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:6215)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5604)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5657)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5623)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5781)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5631)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5838)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5604)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5657)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5623)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5631)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5604)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:8701)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:8621)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:8574)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:8959)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:239)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:363)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:8668)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1109)
🤖 AI解决方案
错误翻译
原文：java.lang.ArrayIndexOutOfBoundsException: length=0; index=-1
译文：数组索引越界异常：数组长度为0；索引值为-1
原因分析
根本原因：尝试访问空的ArrayList，使用了非法索引值-1。
具体位置：在TextChapter.getReadLength()方法中（第17行），调用ArrayList.get(-1)时发生异常。这说明程序试图获取一个不存在的列表元素的读取长度。
错误上下文：这个错误发生在用户操作进度条组件（SeekBar）时，系统回调onStopTrackingTouch方法，最终尝试获取章节的读取长度信息。
解决方案
java
// 修复 TextChapter.getReadLength() 方法
public int getReadLength() {
// 检查列表是否为空，防止空指针和索引越界
if (textList == null || textList.isEmpty()) {
return 0; // 返回默认值
}
// 检查索引是否合法（如果使用currentIndex变量）
if (currentIndex < 0 || currentIndex >= textList.size()) {
return textList.isEmpty() ? 0 : textList.get(0).length(); // 返回安全值
}
return textList.get(currentIndex).length();
}
java
// 或者在调用处添加保护性检查
// 在调用 getReadLength() 之前确保状态正确
if (textChapter != null && textChapter.isValid()) {
int length = textChapter.getReadLength();
// 使用length进行后续操作
} else {
// 处理无效章节的情况
seekBar.setProgress(0);
}