Android 自定义 ListView IndexOutOfBoundsException
Android Custom ListView IndexOutOfBoundsException
我需要你的帮助。
我有一个包含三个元素的自定义列表视图。当我按下加号按钮时，一个新项目将被添加到列表中。 ListView 应该更新。
但是我得到以下错误
04-16 15:54:52.177: E/AndroidRuntime(32601): Process: de.schatner.sino.main, PID: 32601
04-16 15:54:52.177: E/AndroidRuntime(32601): java.lang.IndexOutOfBoundsException: Invalid index 8, size is 8
04-16 15:54:52.177: E/AndroidRuntime(32601): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
04-16 15:54:52.177: E/AndroidRuntime(32601): at java.util.ArrayList.get(ArrayList.java:308)
04-16 15:54:52.177: E/AndroidRuntime(32601): at de.schatner.sino.main.MainActivity$ListAdapter.getView(MainActivity.java:201)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.AbsListView.obtainView(AbsListView.java:2823)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.ListView.makeAndAddView(ListView.java:1884)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.ListView.fillDown(ListView.java:713)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.ListView.fillGap(ListView.java:677)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.AbsListView.trackMotionScroll(AbsListView.java:7040)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.AbsListView.scrollIfNeeded(AbsListView.java:4162)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.AbsListView.startScrollIfNeeded(AbsListView.java:4090)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.AbsListView.onTouchMove(AbsListView.java:5511)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.AbsListView.onTouchEvent(AbsListView.java:5366)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.View.dispatchTouchEvent(View.java:8981)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2698)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2410)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.AbsListView.dispatchTouchEvent(AbsListView.java:5308)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2709)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2425)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2709)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2425)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2709)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2425)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2709)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2425)
04-16 15:54:52.177: E/AndroidRuntime(32601): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2568)
04-16 15:54:52.177: E/AndroidRuntime(32601): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1776)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.app.Activity.dispatchTouchEvent(Activity.java:2866)
04-16 15:54:52.177: E/AndroidRuntime(32601): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2529)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.View.dispatchPointerEvent(View.java:9186)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4706)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4544)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4068)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4121)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4087)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4201)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4095)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4258)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4068)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4121)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4087)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4095)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4068)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6564)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6454)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6425)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6654)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:176)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:6625)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:6677)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:777)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.Choreographer.doCallbacks(Chor
我在下面发布我的代码：
MainActivity.java
public class MainActivity extends ListActivity {
private ArrayList<NoticeDTO> lists = null;
private ListAdapter listAdapter;
final Activity activity = this;
public int i=1;
private EditText et_search;
private SQLiteHandler dbHandler;
@Override
protected void onCreate(Bundle savedInstanceState) {
ActionBar bar = this.getActionBar();
bar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#48cfae")));
bar.setDisplayShowHomeEnabled(false);
Window window = getWindow();
window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
window.setStatusBarColor(getResources().getColor(R.color.flattygreendark));
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
dbHandler = new SQLiteHandler(this);
LinkedList<NoticeDTO> notices= dbHandler.getAllNotes();
lists = new ArrayList<NoticeDTO>();
lists.addAll(notices);
this.listAdapter = new ListAdapter(this, R.layout.listrow, lists);
setListAdapter(this.listAdapter);
this.getListView().setTextFilterEnabled(true);
this.et_search= (EditText) this.findViewById(R.id.et_search);
this.et_search.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
MainActivity.this.listAdapter.getFilter().filter(s.toString());
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
final Button bt_delete= (Button) this.findViewById(R.id.bt_delete);
bt_delete.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
et_search.setText("");
}
});
final Button bt_set_event= (Button) this.findViewById(R.id.bt_new_event);
bt_set_event.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
GregorianCalendar calendar = new GregorianCalendar();
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
String date=""+calendar.get(Calendar.DAY_OF_MONTH)+"."+calendar.get(Calendar.MONTH)+"."+calendar.get(Calendar.YEAR);
date+=" "+sdf.format(calendar.getTime());
try{
long rowId= dbHandler.insertNewNotice("Testliste für den zzz Einkauf \n"
+ "laoasd asdj asdjas ",date,date);
}catch(Exception e){
e.printStackTrace();
}
LinkedList<NoticeDTO> notices = new LinkedList<NoticeDTO>();
notices= dbHandler.getAllNotes();
lists.clear();
lists.addAll(notices);
listAdapter.notifyDataSetChanged();
}
});
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id){
NoticeDTO notice=(NoticeDTO) l.getItemAtPosition(position);
Intent i= new Intent(MainActivity.this, NoticeActivity.class);
i.putExtra("text", notice.getText());
i.putExtra("noticeId", notice.getId());
startActivity(i);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
protected void onResume(){
super.onResume();
this.onCreate(null);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
//private class
private class ListAdapter extends ArrayAdapter<NoticeDTO> {
private ArrayList<NoticeDTO> originalList;
private ArrayList<NoticeDTO> noticeList;
private NoticeFilter filter;
public ListAdapter(Context context, int textViewResourceId,
ArrayList<NoticeDTO> noticeList) {
super(context, textViewResourceId, noticeList);
this.noticeList = new ArrayList<NoticeDTO>();
this.noticeList.addAll(noticeList);
this.originalList = new ArrayList<NoticeDTO>();
this.originalList.addAll(noticeList);
}
@Override
public Filter getFilter() {
if (filter == null) {
filter = new NoticeFilter();
}
return filter;
}
private class ViewHolder {
TextView toptext;
TextView bottomtext;
TextView footertext;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v= convertView;
ViewHolder holder = null;
if (convertView == null) {
LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.listrow, null);
holder = new ViewHolder();
holder.toptext = (TextView) v.findViewById(R.id.toptext);
holder.bottomtext = (TextView) v.findViewById(R.id.bottomtext);
holder.footertext = (TextView) v.findViewById(R.id.footertext);
v.setTag(holder);
}else{
holder = (ViewHolder) v.getTag();
}
NoticeDTO notice = noticeList.get(position);
if (notice != null) {
if(notice.getText().length()>20){
holder.toptext.setText(notice.getText().substring(0, 20)+"...");
}else{
holder.toptext.setText(notice.getText());
}
holder.bottomtext.setText(notice.getCreate_date()+"(ID: "+notice.getId()+")");
holder.footertext.setText("Zuletzt geändert am: "+notice.getEdit_date());
}
return v;
}
private class NoticeFilter extends Filter{
@Override
protected FilterResults performFiltering(CharSequence constraint) {
constraint = constraint.toString().toLowerCase(Locale.GERMANY);
FilterResults result = new FilterResults();
if(constraint != null && constraint.toString().length() > 0){
ArrayList<NoticeDTO> filteredItems = new ArrayList<NoticeDTO>();
for(int i = 0, l = originalList.size(); i < l; i++){
NoticeDTO notice = originalList.get(i);
if(notice.getText().toLowerCase(Locale.GERMANY).contains(constraint)){
filteredItems.add(notice);
}
}
result.count = filteredItems.size();
result.values = filteredItems;
}else{
synchronized(this){
result.values = originalList;
result.count = originalList.size();
}
}
return result;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
noticeList = (ArrayList<NoticeDTO>) results.values;
notifyDataSetChanged();
clear();
for(int i = 0, l = noticeList.size(); i < l; i++){
add(noticeList.get(i));
}
notifyDataSetInvalidated();
}
}
}
}
ListView 的刷新不起作用。
请帮助别人！
问题是在您的代码的第 201 行发生了 IndexOutOfBoundsException（您的 ListAdapter 私有的 getView 方法 class）以后请在导致异常的行添加注释。
进一步分析，抛出异常的代码行是：
NoticeDTO notice = noticeList.get(position);
两件事。首先，您可以通过以下方式修复异常：
NoticeDTO notice = noticeList.get(position-1);
位置-1 的原因是您正在尝试使用 getView 的 "int position" 输入参数。这个位置变量不像数组那样从零开始索引。也就是说，你试图获取第8位的列表项；但是您的 arrayList 大小为 8（索引从 0 到 7）
其次，此代码在任何 if-else 逻辑之外。稍后，如果您决定添加删除功能（从列表中删除项目），如果您在尝试使用 position 之前检查列表是否为空，您就会省去一些麻烦。
我需要你的帮助。
我有一个包含三个元素的自定义列表视图。当我按下加号按钮时，一个新项目将被添加到列表中。 ListView 应该更新。
但是我得到以下错误
04-16 15:54:52.177: E/AndroidRuntime(32601): Process: de.schatner.sino.main, PID: 32601
04-16 15:54:52.177: E/AndroidRuntime(32601): java.lang.IndexOutOfBoundsException: Invalid index 8, size is 8
04-16 15:54:52.177: E/AndroidRuntime(32601): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
04-16 15:54:52.177: E/AndroidRuntime(32601): at java.util.ArrayList.get(ArrayList.java:308)
04-16 15:54:52.177: E/AndroidRuntime(32601): at de.schatner.sino.main.MainActivity$ListAdapter.getView(MainActivity.java:201)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.AbsListView.obtainView(AbsListView.java:2823)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.ListView.makeAndAddView(ListView.java:1884)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.ListView.fillDown(ListView.java:713)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.ListView.fillGap(ListView.java:677)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.AbsListView.trackMotionScroll(AbsListView.java:7040)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.AbsListView.scrollIfNeeded(AbsListView.java:4162)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.AbsListView.startScrollIfNeeded(AbsListView.java:4090)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.AbsListView.onTouchMove(AbsListView.java:5511)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.AbsListView.onTouchEvent(AbsListView.java:5366)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.View.dispatchTouchEvent(View.java:8981)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2698)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2410)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.widget.AbsListView.dispatchTouchEvent(AbsListView.java:5308)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2709)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2425)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2709)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2425)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2709)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2425)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2709)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2425)
04-16 15:54:52.177: E/AndroidRuntime(32601): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2568)
04-16 15:54:52.177: E/AndroidRuntime(32601): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1776)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.app.Activity.dispatchTouchEvent(Activity.java:2866)
04-16 15:54:52.177: E/AndroidRuntime(32601): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2529)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.View.dispatchPointerEvent(View.java:9186)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4706)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4544)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4068)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4121)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4087)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4201)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4095)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4258)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4068)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4121)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4087)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4095)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4068)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6564)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6454)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6425)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6654)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:176)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:6625)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:6677)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:777)
04-16 15:54:52.177: E/AndroidRuntime(32601): at android.view.Choreographer.doCallbacks(Chor
我在下面发布我的代码：
MainActivity.java
public class MainActivity extends ListActivity {
private ArrayList<NoticeDTO> lists = null;
private ListAdapter listAdapter;
final Activity activity = this;
public int i=1;
private EditText et_search;
private SQLiteHandler dbHandler;
@Override
protected void onCreate(Bundle savedInstanceState) {
ActionBar bar = this.getActionBar();
bar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#48cfae")));
bar.setDisplayShowHomeEnabled(false);
Window window = getWindow();
window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
window.setStatusBarColor(getResources().getColor(R.color.flattygreendark));
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
dbHandler = new SQLiteHandler(this);
LinkedList<NoticeDTO> notices= dbHandler.getAllNotes();
lists = new ArrayList<NoticeDTO>();
lists.addAll(notices);
this.listAdapter = new ListAdapter(this, R.layout.listrow, lists);
setListAdapter(this.listAdapter);
this.getListView().setTextFilterEnabled(true);
this.et_search= (EditText) this.findViewById(R.id.et_search);
this.et_search.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
MainActivity.this.listAdapter.getFilter().filter(s.toString());
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
final Button bt_delete= (Button) this.findViewById(R.id.bt_delete);
bt_delete.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
et_search.setText("");
}
});
final Button bt_set_event= (Button) this.findViewById(R.id.bt_new_event);
bt_set_event.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
GregorianCalendar calendar = new GregorianCalendar();
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
String date=""+calendar.get(Calendar.DAY_OF_MONTH)+"."+calendar.get(Calendar.MONTH)+"."+calendar.get(Calendar.YEAR);
date+=" "+sdf.format(calendar.getTime());
try{
long rowId= dbHandler.insertNewNotice("Testliste für den zzz Einkauf \n"
+ "laoasd asdj asdjas ",date,date);
}catch(Exception e){
e.printStackTrace();
}
LinkedList<NoticeDTO> notices = new LinkedList<NoticeDTO>();
notices= dbHandler.getAllNotes();
lists.clear();
lists.addAll(notices);
listAdapter.notifyDataSetChanged();
}
});
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id){
NoticeDTO notice=(NoticeDTO) l.getItemAtPosition(position);
Intent i= new Intent(MainActivity.this, NoticeActivity.class);
i.putExtra("text", notice.getText());
i.putExtra("noticeId", notice.getId());
startActivity(i);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
protected void onResume(){
super.onResume();
this.onCreate(null);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
//private class
private class ListAdapter extends ArrayAdapter<NoticeDTO> {
private ArrayList<NoticeDTO> originalList;
private ArrayList<NoticeDTO> noticeList;
private NoticeFilter filter;
public ListAdapter(Context context, int textViewResourceId,
ArrayList<NoticeDTO> noticeList) {
super(context, textViewResourceId, noticeList);
this.noticeList = new ArrayList<NoticeDTO>();
this.noticeList.addAll(noticeList);
this.originalList = new ArrayList<NoticeDTO>();
this.originalList.addAll(noticeList);
}
@Override
public Filter getFilter() {
if (filter == null) {
filter = new NoticeFilter();
}
return filter;
}
private class ViewHolder {
TextView toptext;
TextView bottomtext;
TextView footertext;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v= convertView;
ViewHolder holder = null;
if (convertView == null) {
LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.listrow, null);
holder = new ViewHolder();
holder.toptext = (TextView) v.findViewById(R.id.toptext);
holder.bottomtext = (TextView) v.findViewById(R.id.bottomtext);
holder.footertext = (TextView) v.findViewById(R.id.footertext);
v.setTag(holder);
}else{
holder = (ViewHolder) v.getTag();
}
NoticeDTO notice = noticeList.get(position);
if (notice != null) {
if(notice.getText().length()>20){
holder.toptext.setText(notice.getText().substring(0, 20)+"...");
}else{
holder.toptext.setText(notice.getText());
}
holder.bottomtext.setText(notice.getCreate_date()+"(ID: "+notice.getId()+")");
holder.footertext.setText("Zuletzt geändert am: "+notice.getEdit_date());
}
return v;
}
private class NoticeFilter extends Filter{
@Override
protected FilterResults performFiltering(CharSequence constraint) {
constraint = constraint.toString().toLowerCase(Locale.GERMANY);
FilterResults result = new FilterResults();
if(constraint != null && constraint.toString().length() > 0){
ArrayList<NoticeDTO> filteredItems = new ArrayList<NoticeDTO>();
for(int i = 0, l = originalList.size(); i < l; i++){
NoticeDTO notice = originalList.get(i);
if(notice.getText().toLowerCase(Locale.GERMANY).contains(constraint)){
filteredItems.add(notice);
}
}
result.count = filteredItems.size();
result.values = filteredItems;
}else{
synchronized(this){
result.values = originalList;
result.count = originalList.size();
}
}
return result;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
noticeList = (ArrayList<NoticeDTO>) results.values;
notifyDataSetChanged();
clear();
for(int i = 0, l = noticeList.size(); i < l; i++){
add(noticeList.get(i));
}
notifyDataSetInvalidated();
}
}
}
}
ListView 的刷新不起作用。
请帮助别人！
问题是在您的代码的第 201 行发生了 IndexOutOfBoundsException（您的 ListAdapter 私有的 getView 方法 class）以后请在导致异常的行添加注释。 进一步分析，抛出异常的代码行是：
NoticeDTO notice = noticeList.get(position);
两件事。首先，您可以通过以下方式修复异常：
NoticeDTO notice = noticeList.get(position-1);
位置-1 的原因是您正在尝试使用 getView 的 "int position" 输入参数。这个位置变量不像数组那样从零开始索引。也就是说，你试图获取第8位的列表项；但是您的 arrayList 大小为 8（索引从 0 到 7）
其次，此代码在任何 if-else 逻辑之外。稍后，如果您决定添加删除功能（从列表中删除项目），如果您在尝试使用 position 之前检查列表是否为空，您就会省去一些麻烦。