Android列表视图数组索引超出界限 – 没有线索？
我有一个应用程序在打开时加载一个列表视图，但是我得到一个数组索引超出界限exception，没有关于问题所在的线索。 它试图在某处访问index = -1，但我不知道在哪里。
该应用程序从数据库加载家庭作业信息，将它们放入ArrayList中的单独的Homework对象中，并从那里将其加载到ListView中。 我真的不知道exception的来源，我已经检查了所有代码。 列表中只有1个作业，但是当我尝试打开它时，应用程序拒绝打开并强制关闭。 这是LogCat输出
谢谢
LogCat输出
01-11 16:38:43.644: E/AndroidRuntime(7267): FATAL EXCEPTION: main 01-11 16:38:43.644: E/AndroidRuntime(7267): java.lang.ArrayIndexOutOfBoundsException: length=29; index=-1 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.text.StaticLayout.calculateEllipsis(StaticLayout.java:738) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.text.StaticLayout.out(StaticLayout.java:702) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.text.StaticLayout.generate(StaticLayout.java:410) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.text.StaticLayout.(StaticLayout.java:140) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.TextView.makeSingleLayout(TextView.java:5888) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.TextView.makeNewLayout(TextView.java:5745) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.TextView.onMeasure(TextView.java:6102) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.View.measure(View.java:15513) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:645) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:425) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.View.measure(View.java:15513) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4827) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1052) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.LinearLayout.onMeasure(LinearLayout.java:590) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.View.measure(View.java:15513) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.ListView.measureScrapChild(ListView.java:1183) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.ListView.measureHeightOfChildren(ListView.java:1248) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.ListView.onMeasure(ListView.java:1158) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.View.measure(View.java:15513) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4827) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.LinearLayout.measureVertical(LinearLayout.java:695) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.LinearLayout.onMeasure(LinearLayout.java:588) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.View.measure(View.java:15513) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4827) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.View.measure(View.java:15513) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.LinearLayout.measureVertical(LinearLayout.java:847) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.LinearLayout.onMeasure(LinearLayout.java:588) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.View.measure(View.java:15513) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4827) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 01-11 16:38:43.644: E/AndroidRuntime(7267): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2176) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.View.measure(View.java:15513) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1874) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1089) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1265) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:989) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4351) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.Choreographer.doCallbacks(Choreographer.java:562) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.Choreographer.doFrame(Choreographer.java:532) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.os.Handler.handleCallback(Handler.java:725) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.os.Handler.dispatchMessage(Handler.java:92) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.os.Looper.loop(Looper.java:137) 01-11 16:38:43.644: E/AndroidRuntime(7267): at android.app.ActivityThread.main(ActivityThread.java:5039) 01-11 16:38:43.644: E/AndroidRuntime(7267): at java.lang.reflect.Method.invokeNative(Native Method) 01-11 16:38:43.644: E/AndroidRuntime(7267): at java.lang.reflect.Method.invoke(Method.java:511) 01-11 16:38:43.644: E/AndroidRuntime(7267): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 01-11 16:38:43.644: E/AndroidRuntime(7267): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 01-11 16:38:43.644: E/AndroidRuntime(7267): at dalvik.system.NativeStart.main(Native Method) 从DB加载
public ArrayList getHomeworks() { String[] columns = new String[] { KEY_ROWID, KEY_TITLE, KEY_SUBJECT, KEY_DUE_DAY, KEY_DUE_MONTH, KEY_DUE_YEAR, KEY_NOTES, KEY_REMINDER_ONE, KEY_REMINDER_TWO }; Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null, null); ArrayList hwks = new ArrayList(); int id = c.getColumnIndex(KEY_ROWID); int iTitle = c.getColumnIndex(KEY_TITLE); int iSub = c.getColumnIndex(KEY_SUBJECT); int iDay = c.getColumnIndex(KEY_DUE_DAY); int iMonth = c.getColumnIndex(KEY_DUE_MONTH); int iYear = c.getColumnIndex(KEY_DUE_YEAR); int iNotes = c.getColumnIndex(KEY_NOTES); int iOne = c.getColumnIndex(KEY_REMINDER_ONE); int iTwo = c.getColumnIndex(KEY_REMINDER_TWO); for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) { HomeworkItem h = new HomeworkItem(); h.id = c.getInt(id); h.title = c.getString(iTitle); h.subject = c.getString(iSub); h.day = Integer.parseInt(c.getString(iDay)); h.month = Integer.parseInt(c.getString(iMonth)); h.year = Integer.parseInt(c.getString(iYear)); h.notes = c.getString(iNotes); h.late = h.isLate(); h.oneDayReminder = Boolean.parseBoolean(c.getString(iOne)); h.twoDayReminder = Boolean.parseBoolean(c.getString(iTwo)); hwks.add(h); } return hwks; }
ListView适配器
public class MyAdapter extends BaseAdapter { // adapter for list public MyAdapter(Context c) { } public int getCount() { // TODO Auto-generated method stub Log.d("hwk", hwks.size()+" is the size"); return hwks.size(); } public Object getItem(int position) { // TODO Auto-generated method stub Log.d("hwk", position+" being accessed"); return position; } public long getItemId(int position) { // TODO Auto-generated method stub Log.d("hwk", position+" being accessed"); return position; } public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub View v = convertView; // inflate the list TextView title, subject, dueDate, listLate; if (v == null) { LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE); v = vi.inflate(R.layout.list, null); Log.d("hwk", "v inflated"); } title = (TextView) v.findViewById(R.id.listTitle); // get the id's // of fields subject = (TextView) v.findViewById(R.id.listSubject); dueDate = (TextView) v.findViewById(R.id.listDueDate); listLate = (TextView) v.findViewById(R.id.listLate); Log.d("hwk", "got views"); title.setText(hwks.get(position).title); subject.setText(hwks.get(position).subject); String date = hwks.get(position).day + "/" + (hwks.get(position).month + 1) + "/" + hwks.get(position).year; dueDate.setText(date); Log.d("hwk", "some text set"); if (hwks.get(position).late) { // set if they are late or not if (hwks.get(position).isToday()) { listLate.setTextColor(Color.rgb(255, 165, 0)); listLate.setText("Due Today!"); } else { listLate.setTextColor(Color.RED); listLate.setText("Late"); } } else { listLate.setTextColor(Color.GREEN); listLate.setText("Ongoing"); } Log.d("hwk", "returning v"); return v; } }
编辑：此外，当我第一次在应用程序中添加一个家庭作业时，ListView工作，它会刷新ListView并添加家庭作业。 当发生这种情况时，我完全重新加载主Activity，因此在应用程序关闭一次之后打开它似乎是一个问题。
编辑2：我从应用程序中删除了数据，添加了一个新的家庭作业，现在我无法重新创建问题..这可能是什么造成的？！
编辑3：检测到问题。 这与一些文字有关。 我已经知道，当我将“标题”设置为“二项式扩展”时，它重新创建了我之前所谓的“二项式扩展”的错误。 是否可以尝试将该String放在TextView中并且文本太大？
我已经扩展了TextView的宽度，它停止了错误。 当我扩展文本时，我再次遇到了问题。 文本视图溢出一定是个问题。 我可以设置任何TextView属性来阻止它吗？
这是因为在没有安装android:singleLine="true"的TextView上设置android:ellipsize="middle" （或start ）引起的。
例如，以下崩溃发生此错误：
但以下不是：
参考： https ： //code.google.com/p/android/issues/detail？id = 33868
注意： singleLine是一个已弃用的属性，但仍适用于Jelly Bean。
你的问题出在getView方法中，每当你滚动数组时都会调用这个方法，所以在做任何逻辑之前一定要检查视图是否为null。
检查CursorAdapter 构造函数中的布局和游标列名称数组长度。 当两个数组的长度不匹配时，会导致ArrayOutOfBoundsException 。
这肯定与文本视图ellipsize逻辑有关，它与适配器代码无关。