当我滚动这个ListView时，我得到一个indexOutOfRangeException。我不知道出了什么问题，除了它与addScrapView有关，如我的LogCat所示。我一般都知道导致IndexOutOfRangeException的原因，但我不明白ListView导致它的原因。我不明白为什么它会导致错误，并且解释错误的来源会有所帮助。我不得不重写getViewTypeCount来正确设置属性。
public class InfoActivity extends AppCompatActivity {
public int Position = -1;
private static word[] removeElement(word[] words1, int counter) {
if(counter>0) {
word[] copy = new word[words1.length-1];
System.arraycopy(words1, 0, copy, 0, counter);
System.arraycopy(words1, counter+1, copy, counter, words1.length-counter-1);
return copy;
}
return null;
}
// Toast.makeText(getApplicationContext(),"Ran in: " + millis +" milliseconds",Toast.LENGTH_LONG).show();}
private static word[] findSentencewords(String sentence) {
boolean[] chars = new boolean[26];
word[] words1={new word('A')};
for (int i=0;i<26;i++)
chars[i]=sentence.contains(String.valueOf((char)('A'+i)));
for (int i=1; i<26;i++)
if (chars[i])
{
if(words1 != null) {
words1 = Arrays.copyOf(words1, words1.length + 1);
words1[words1.length - 1] =words[i];
}
else {
words1[0]=words[0];
}
}
if (!chars[0]) words1= Arrays.copyOfRange(words1,1,words1.length);
return words1;
}
public void kill(View view) {
try {
Intent i = new Intent();
setResult(RESULT_OK, i);
i.putExtra("Count", word.count);
finish();
} catch (Throwable throwable) {
throwable.printStackTrace();
}
}
public void InfowordAdd(View view) {
word word = new word(word.idents.charAt(word.count++));
MainActivity.words[word.ID]=word;
//Activity act = this;
//this.recreate()mParts=mParts2;
mParts.add(word.count-1,word);
arrayAdapter.notifyDataSetChanged();
}
public void doNote(View view) {
int i = 0;
if (notes==null) {
notes=new word[1];
notes[0]=new word((char)(255));
notes[0].setName('*');
}
else
{
i=notes.length;
notes=Arrays.copyOf(notes,i+1);
notes[i]=new word((char)255);
notes[i].setName('*');
}
mParts.add(notes[i]);
arrayAdapter.notifyDataSetChanged();
}
public void doDelete(View view) {
if (Position >-1) {
mParts.remove(Position);
Position=-1;
if(Position<=25){
word.count-=1;
MainActivity.words=removeElement(MainActivity.words,Position);}
arrayAdapter.notifyDataSetChanged();
}
else Toast.makeText(this,"Nothing selected",Toast.LENGTH_LONG).show();
}
class wordViewer extends ArrayAdapter<word> {
private ArrayList<word> objects;
public wordViewer(Context context, int resource, ArrayList objects) {
super(context, resource, objects);
this.objects = objects;
// this.context = context;
}
@Override
public int getViewTypeCount() {
return mParts.size()-1;
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public View getView(int position, View convertView, final ViewGroup parent) {
// assign the view we are converting to a local variable
View v = convertView;
final ViewHolder holder;
// first check to see if the view is null. if so, we have to inflate it.
// to inflate it basically means to render, or show, the view.
if (v == null) {
holder=new ViewHolder();
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.word_view, null);
holder.ref=position;
holder.editText1= (EditText) convertView.findViewById(R.id.definition);
CheckBox tb = (CheckBox) convertView.findViewById(R.id.trueBox);
CheckBox fb = (CheckBox) convertView.findViewById(R.id.falseBox);
holder.tb=tb;
holder.fb=fb;
holder.label=(TextView)convertView.findViewById(R.id.wordName);
convertView.setTag(holder);
} else holder= (ViewHolder) convertView.getTag();
v=convertView;
TextView name = (TextView) v.findViewById(R.id.wordName);
word i = objects.get(position);
holder.editText1.setText(e.valueAt(position));
holder.editText1.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
e.setValueAt(holder.ref, s);
}
});
{
holder.fb.setChecked(d.get(holder.ref));
holder.tb.setChecked(c.get(holder.ref));
/* boolean def = c.get(position);
if (def&&i.valueSet) {
holder.fb.setChecked(false);
holder.tb.setChecked(true);
}
else if(!def)
{
holder.fb.setChecked(true);
holder.tb.setChecked(false);
}*/
CharSequence t = String.valueOf(i.getName());
name.setText(t);
if (i.dictionaryValue != null) holder.editText1.setText(i.dictionaryValue);
}
return v;
}
}
public ArrayList<word> mParts = new ArrayList<word>();
public static word[] words;
public word[] notes;
public wordViewer mAdapter;
public ListView listView;
public static SparseArray<Editable> e = new SparseArray<>(26);
public static SparseBooleanArray c = new SparseBooleanArray(26);
public static SparseBooleanArray d = new SparseBooleanArray(26);
public static View rootview;
public static String args;
public static String concs;
public ArrayAdapter<word> arrayAdapter;
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
if(savedInstanceState!=null) {
notes = (word[]) savedInstanceState.getParcelableArray("notes");
int counter=0;
argParse= ParserResponse.ParseSentence(makeParsable(args), 0);
concParse=ParserResponse.ParseSentence(makeParsable(concs),0);
for (word a:words
) {
if(a!=null) {
if (a.valueSet) c.put(counter, a.immutabledef);
else c.put(counter, a.def);
if (a.valueSet) d.put(counter, !a.immutabledef);
else d.put(counter, !a.def);
counter++;
mParts.add(a);
}
}
if (notes!=null)for (word e:notes
) {
if(e!=null) {
if (e.valueSet) c.put(counter, e.immutabledef);
else c.put(counter, e.def);
if (e.valueSet) d.put(counter, !e.immutabledef);
else d.put(counter, !e.def);
counter++;
mParts.add(e);
}
}
arrayAdapter = new wordViewer(this, R.layout.word_view,mParts);
listView= (ListView) findViewById(R.id.list);
listView.setAdapter(arrayAdapter);
listView.getCheckedItemPositions();
listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> arg0, View view, int position, long arg3) {
listView.setSelection(position);
Position=position;
Toast.makeText(getBaseContext(),String.valueOf(position)+" selected",Toast.LENGTH_LONG).show();
Log.d("Selected: ",String.valueOf(position));
return false;
}
});
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putParcelableArray("notes", notes);
}
@Override
protected void onCreate(Bundle stuff) {
super.onCreate(stuff);
setContentView(R.layout.activity_info);
Intent i = getIntent();
rootview = getWindow().getDecorView();
Bundle b = i.getExtras();
words = MainActivity.words;
args = b.getString("Argument");
concs = b.getString("Conclusion");
TextView tv = (TextView) findViewById(R.id.argText);
tv.setText(args);
tv = (TextView) findViewById(R.id.concText);
tv.setText(concs);
tv = (TextView) findViewById(R.id.valid);
tv.setText(b.getString("Validity"));
tv = (TextView) findViewById(R.id.sound);
tv.setText(b.getString("Soundness"));
//int index = 0;
argParse = ParserResponse.ParseSentence(makeParsable(args), 0);
concParse = ParserResponse.ParseSentence(makeParsable(concs), 0);
if (stuff == null) {
int counter = 0;
for (word a : words
) {
if (a != null) {
if (a.valueSet) c.put(counter, a.immutabledef);
else c.put(counter, a.def);
if (a.valueSet) d.put(counter, !a.immutabledef);
else d.put(counter, !a.def);
counter++;
mParts.add(a);
}
if (notes != null) for (word e : notes
) {
mParts.add(e);
}
}
arrayAdapter = new wordViewer(this, R.layout.word_view, mParts);
listView = (ListView) findViewById(R.id.list);
listView.setAdapter(arrayAdapter);
listView.getCheckedItemPositions();
listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> arg0, View view, int position, long arg3) {
listView.setSelection(position);
Position = position;
Toast.makeText(getBaseContext(), String.valueOf(position) + " selected", Toast.LENGTH_LONG).show();
Log.d("Selected: ", String.valueOf(position));
return false;
}
});
}
}
private static class ViewHolder {
EditText editText1;
TextView label;
int ref;
}
`
我的LogCat在这里： java.lang.ArrayIndexOutOfBoundsException：length = 2;索引= 2
在android.widget.AbsListView $ RecycleBin.addScrapView（AbsListView.java:6643）
在android.widget.ListView.layoutChildren（ListView.java:1643）
在android.widget.AbsListView.onLayout（AbsListView.java:2148）
在android.view.View.layout（View.java:16630）
在android.view.ViewGroup.layout（ViewGroup.java:5437）
在android.widget.RelativeLayout.onLayout（RelativeLayout.java:1079）
在android.view.View.layout（View.java:16630）
在android.view.ViewGroup.layout（ViewGroup.java:5437）
在android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）
在android.widget.FrameLayout.onLayout（FrameLayout.java:273）
在android.view.View.layout（View.java:16630）
在android.view.ViewGroup.layout（ViewGroup.java:5437）
在android.support.v7.widget.ActionBarOverlayLayout.onLayout（ActionBarOverlayLayout.java:435）
在android.view.View.layout（View.java:16630）
在android.view.ViewGroup.layout（ViewGroup.java:5437）
在android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）
在android.widget.FrameLayout.onLayout（FrameLayout.java:273）
在android.view.View.layout（View.java:16630）
在android.view.ViewGroup.layout（ViewGroup.java:5437）
在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1743）
在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1586）
在android.widget.LinearLayout.onLayout（LinearLayout.java:1495）
在android.view.View.layout（View.java:16630）
在android.view.ViewGroup.layout（ViewGroup.java:5437）
在android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）
在android.widget.FrameLayout.onLayout（FrameLayout.java:273）
在com.android.internal.policy.PhoneWindow $ DecorView.onLayout（PhoneWindow.java:2678）
在android.view.View.layout（View.java:16630）
在android.view.ViewGroup.layout（ViewGroup.java:5437）
在android.view.ViewRootImpl.performLayout（ViewRootImpl.java:2171）
在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:1931）
在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1107）
在android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:6013）
在android.view.Choreographer $ CallbackRecord.run（Choreographer.java:858）
在android.view.Choreographer.doCallbacks（Choreographer.java:670）
在android.view.Choreographer.doFrame（Choreographer.java:606）
在android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:844）
在android.os.Handler.handleCallback（Handler.java:739）
在android.os.Handler.dispatchMessage（Handler.java:95）
在android.os.Looper.loop（Looper.java:148）