ArrayIndexOutOfBoundsException异常与ArrayAdapter带过滤器 [英] ArrayIndexOutOfBoundsException with ArrayAdapter with filter
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问题描述
我正在一个 ArrayIndexOutOfBoundsException异常下面的自定义实现的 ArrayAdapter 给定的启用过滤。我看到过滤code返回正确的结果集，但是当视图筛选之后呈现，我得到一个异常。我在做什么错在这里。任何帮助AP preaciated。
I am getting an ArrayIndexOutOfBoundsException with the given below custom implementation of an ArrayAdapter with filtering enabled. I see the filtering code returning the correct resultset, but when view is rendered after filtering, I get an exception. What am I doing wrong here. Any help is appreaciated.
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Filter;
import android.widget.ImageView;
import android.widget.TextView;
import com.syntrio.iwm.act.R;
public class IWMArrayAdapter<T> extends ArrayAdapter<T>{
Activity activity;
List<T> mItems;
String[] icons;
boolean isArrowNeeded=false;
boolean isIconNeeded=false;
private ItemsFilter mFilter;
public IWMArrayAdapter(Activity context,List<T> items) {
super(context, R.layout.item_row,items);
activity=context;
mItems=items;
}
public void setIcons(String[] iconList){
if(iconList!=null && iconList.length>0){
icons=iconList;
isIconNeeded=true;
}
}
public void setArrowNeeded(){
isArrowNeeded=true;
}
@Override
public View getView(int position, View convertView,ViewGroup parent) {
View row = convertView;
if (row == null) {
LayoutInflater inflater = activity.getLayoutInflater();
row = inflater.inflate(R.layout.item_row_array, parent, false);
}
TextView label = (TextView) row.findViewById(R.id.label);
label.setText(mItems.get(position).toString());
ImageView icon;
ImageView arrow;
if(isIconNeeded){
icon = (ImageView) row.findViewById(R.id.row_image);
if(icons.length==1){
icon.setImageResource(activity.getResources().getIdentifier(icons[0], "drawable", "com.syntrio.iwm.act"));
}
else{
icon.setImageResource(activity.getResources().getIdentifier(icons[position], "drawable", "com.syntrio.iwm.act"));
}
icon.setVisibility(View.VISIBLE);
}
if(isArrowNeeded){
arrow = (ImageView) row.findViewById(R.id.row_arrow);
arrow.setImageResource(activity.getResources().getIdentifier("arrow", "drawable", "com.syntrio.iwm.act"));
arrow.setVisibility(View.VISIBLE);
}
return (row);
}
public Filter getFilter() {
if (mFilter == null) {
mFilter = new ItemsFilter();
}
return mFilter;
}
private class ItemsFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
// We implement here the filter logic
if (constraint == null || constraint.length() == 0) {
// No filter implemented we return all the list
results.values = mItems;
results.count = mItems.size();
}
else {
// We perform filtering operation
List<T> itemsList = new ArrayList<T>();
for (T t : mItems) {
if (t.toString().toUpperCase().startsWith(constraint.toString().toUpperCase()))
itemsList.add(t);
}
results.values = itemsList;
results.count = itemsList.size();
}
return results;
}
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
// Now we have to inform the adapter about the new list filtered
if (results.count == 0){
notifyDataSetInvalidated();
}
else {
List<T> lst = (List<T>)results.values;
List<T> itemsList = new ArrayList<T>(lst);
//this.items=mItems;
mItems =itemsList;
notifyDataSetChanged();
}
}
}
}
例外是：
03-24 16:52:11.608: E/AndroidRuntime(947): FATAL EXCEPTION: main
03-24 16:52:11.608: E/AndroidRuntime(947): java.lang.IndexOutOfBoundsException: Invalid index 1, size is 1
03-24 16:52:11.608: E/AndroidRuntime(947): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:257)
03-24 16:52:11.608: E/AndroidRuntime(947): at java.util.ArrayList.get(ArrayList.java:311)
03-24 16:52:11.608: E/AndroidRuntime(947): at com.syntrio.iwm.IWMArrayAdapter.getView(IWMArrayAdapter.java:50)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.widget.AbsListView.obtainView(AbsListView.java:1409)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.widget.ListView.measureHeightOfChildren(ListView.java:1216)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.widget.ListView.onMeasure(ListView.java:1127)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.view.View.measure(View.java:8313)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.widget.LinearLayout.measureVertical(LinearLayout.java:386)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.widget.LinearLayout.onMeasure(LinearLayout.java:309)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.view.View.measure(View.java:8313)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.view.View.measure(View.java:8313)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.widget.LinearLayout.measureVertical(LinearLayout.java:531)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.widget.LinearLayout.onMeasure(LinearLayout.java:309)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.view.View.measure(View.java:8313)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.view.View.measure(View.java:8313)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.view.View.measure(View.java:8313)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.view.ViewRoot.performTraversals(ViewRoot.java:839)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.view.ViewRoot.handleMessage(ViewRoot.java:1859)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.os.Handler.dispatchMessage(Handler.java:99)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.os.Looper.loop(Looper.java:130)
03-24 16:52:11.608: E/AndroidRuntime(947): at android.app.ActivityThread.main(ActivityThread.java:3683)
03-24 16:52:11.608: E/AndroidRuntime(947): at java.lang.reflect.Method.invokeNative(Native Method)
03-24 16:52:11.608: E/AndroidRuntime(947): at java.lang.reflect.Method.invoke(Method.java:507)
03-24 16:52:11.608: E/AndroidRuntime(947): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
03-24 16:52:11.608: E/AndroidRuntime(947): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
03-24 16:52:11.608: E/AndroidRuntime(947): at dalvik.system.NativeStart.main(Native Method)
更新：增加了异常
Update : added exception
推荐答案
您需要执行<一个href="http://developer.android.com/reference/android/widget/ArrayAdapter.html#getCount%28%29">getCount您的自定义内的方法 ArrayAdapter 。该的ListView 调用它的适配器的方法来找出有多少项目会显示。你需要的东西是这样的：
You need to implement the getCount method within your custom ArrayAdapter. The ListView invokes that method on its adapter to find out how many items it will display. You need something like this:
public int getCount () {
return mItems.size ();
}
这篇关于ArrayIndexOutOfBoundsException异常与ArrayAdapter带过滤器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IT屋！
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