问题描述
我开始在android中开发,我尝试修改Snake代码,包括调用浏览器来显示网页,当我执行我的应用程序时,它显示在brwser中的页面,但问题是当我回到蛇应用程序显示应用程序已意外停止的消息,并且logCat显示下面的例外情况
I start to developpe in android, and I try to modify Snake code for including a call to browser for desplaying web page, when i execute my application it shows the page in the brwser, but the problem when i come back to snake application it shows message that the application has stoped unexpectedly, and the logCat show anthe exception below
02-19 01:06:50.920: W/dalvikvm(3394): threadid=1: thread exiting with uncaught exception (group=0x4015a760)
02-19 01:06:50.930: E/AndroidRuntime(3394): FATAL EXCEPTION: main
02-19 01:06:50.930: E/AndroidRuntime(3394): java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
02-19 01:06:50.930: E/AndroidRuntime(3394): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
02-19 01:06:50.930: E/AndroidRuntime(3394): at java.util.ArrayList.get(ArrayList.java:308)
02-19 01:06:50.930: E/AndroidRuntime(3394): at com.example.android.snake.SnakeView.updateSnake(SnakeView.java:448)
02-19 01:06:50.930: E/AndroidRuntime(3394): at com.example.android.snake.SnakeView.update(SnakeView.java:403)
02-19 01:06:50.930: E/AndroidRuntime(3394): at com.example.android.snake.SnakeView.setMode(SnakeView.java:335)
02-19 01:06:50.930: E/AndroidRuntime(3394): at com.example.android.snake.SnakeView.onKeyDown(SnakeView.java:278)
02-19 01:06:50.930: E/AndroidRuntime(3394): at android.view.KeyEvent.dispatch(KeyEvent.java:2387)
02-19 01:06:50.930: E/AndroidRuntime(3394): at android.view.View.dispatchKeyEvent(View.java:4569)
02-19 01:06:50.930: E/AndroidRuntime(3394): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1113)
02-19 01:06:50.930: E/AndroidRuntime(3394): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1113)
02-19 01:06:50.930: E/AndroidRuntime(3394): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1113)
02-19 01:06:50.930: E/AndroidRuntime(3394): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1113)
02-19 01:06:50.930: E/AndroidRuntime(3394): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:1692)
02-19 01:06:50.930: E/AndroidRuntime(3394): at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1260)
02-19 01:06:50.930: E/AndroidRuntime(3394): at android.app.Activity.dispatchKeyEvent(Activity.java:2231)
02-19 01:06:50.930: E/AndroidRuntime(3394): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1648)
02-19 01:06:50.930: E/AndroidRuntime(3394): at android.view.ViewRoot.deliverKeyEventPostIme(ViewRoot.java:2730)
02-19 01:06:50.930: E/AndroidRuntime(3394): at android.view.ViewRoot.handleFinishedEvent(ViewRoot.java:2703)
02-19 01:06:50.930: E/AndroidRuntime(3394): at android.view.ViewRoot.handleMessage(ViewRoot.java:1958)
02-19 01:06:50.930: E/AndroidRuntime(3394): at android.os.Handler.dispatchMessage(Handler.java:99)
02-19 01:06:50.930: E/AndroidRuntime(3394): at android.os.Looper.loop(Looper.java:126)
02-19 01:06:50.930: E/AndroidRuntime(3394): at android.app.ActivityThread.main(ActivityThread.java:3997)
02-19 01:06:50.930: E/AndroidRuntime(3394): at java.lang.reflect.Method.invokeNative(Native Method)
02-19 01:06:50.930: E/AndroidRuntime(3394): at java.lang.reflect.Method.invoke(Method.java:491)
02-19 01:06:50.930: E/AndroidRuntime(3394): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
02-19 01:06:50.930: E/AndroidRuntime(3394): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
02-19 01:06:50.930: E/AndroidRuntime(3394): at dalvik.system.NativeStart.main(Native Method)
02-19 01:08:07.450: D/A
推荐答案
我觉得很清楚,这里
您正在访问 ArrayList
,该实例已被实例化为 new ArrayList(0)
,如果你至少读过这个错误就很简单。
you are accessing an ArrayList
that has been instantiated as new ArrayList(0)
, quite straightforward if you at least read the error.
ArrayList
对象意味着自动调整大小,但是如果你没有在零大小的数组列表中放置任何东西,那么你会收到这个错误。
ArrayList
objects are meant to automatically resize, but if you don't place anything in a zero-sized array list then you get this error.
这篇关于错误java.lang.IndexOutOfBoundsException:索引0无效,我的程序android中的大小为0的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!