SimpleAdapter背景色の変更、カスタム ビュー、フィルタリングなどの追加機能を追加するためにサブクラス化しました。バックグラウンドはうまく機能していますが、フィルターはそうではありません。アダプターが提供するものを使用してSimpleFilterもまったく問題ないので、ソースからメソッドをコピーしてアダプターに入れました。何も触れていませんがIndexOutOfBoundsException、検索語を入力すると が表示されます。通常は 2 番目または 3 番目の文字にあります。
クラス全体をコピーしましたが、興味深い部分は で、CustomFilter bindViewうまく機能しgetViewています。変更されたフィルターを実装した後、機能しなくなります。例外は最初の行のメソッドの data.get(position) によって引き起こされますbindViewが、問題はフィルターでなければなりません。
public class ChangingColorAdapter extends SimpleAdapter {
int resource;
int[] to;
List<Map<String, String>> data, mUnfilteredData;
String[] from;
Context context;
Resources res;
Filter filter;
/*
* A custom adapter which changes background colors on the elements
* and implements custom filtering
*/
public ChangingColorAdapter(Context context,
List<Map<String, String>> data, int resource, String[] from, int[] to) {
super(context, data, resource, from, to);
this.context = context;
this.resource = resource;
this.data = data;
this.from = from;
this.to = to;
this.res = context.getResources();
}
@Override
public Filter getFilter() {
if(filter != null) return filter;
else return filter = new CustomFilter();
}
/*
* A custom filter which is copied from the simplefilter in simpleadapter.
* Changed word check from .startswith to .contains
*/
private class CustomFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence prefix) {
FilterResults results = new FilterResults();
if (mUnfilteredData == null) {
mUnfilteredData = new ArrayList<Map<String, String>>(data);
}
if (prefix == null || prefix.length() == 0) {
List<Map<String, String>> list = mUnfilteredData;
results.values = list;
results.count = list.size();
} else {
String prefixString = prefix.toString().toLowerCase();
List<Map<String, String>> unfilteredValues = mUnfilteredData;
int count = unfilteredValues.size();
ArrayList<Map<String, ?>> newValues = new ArrayList<Map<String, ?>>(count);
for (int i = 0; i < count; i++) {
Map<String, ?> h = unfilteredValues.get(i);
if (h != null) {
int len = to.length;
for (int j=0; j<len; j++) {
String str = (String)h.get(from[j]);
String[] words = str.split(" ");
int wordCount = words.length;
for (int k = 0; k < wordCount; k++) {
String word = words[k];
if (word.toLowerCase().contains(prefixString)) {
newValues.add(h);
break;
}
}
}
}
}
results.values = newValues;
results.count = newValues.size();
}
return results;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
data = (List<Map<String, String>>) results.values;
if (results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = inflater.inflate(resource, parent, false);
} else {
v = convertView;
}
bindView(position, v);
if(position%2!=0) {
v.setBackgroundColor(Color.DKGRAY);
}
else {
v.setBackgroundColor(Color.BLACK);
}
return v;
}
/*
* Iterate over all elements, check which type the given view is and fill in the data
*/
private void bindView(int position, View view) {
final Map<String, String> dataSet = data.get(position);
if (dataSet == null) {
return;
}
final ViewBinder binder = getViewBinder();
final String[] from = this.from;
final int[] to = this.to;
final int count = to.length;
for (int i = 0; i < count; i++) {
final View v = view.findViewById(to[i]);
if (v != null) {
final Object data = dataSet.get(from[i]);
String text = data == null ? "" : data.toString();
if (text == null) {
text = "";
}
boolean bound = false;
if (binder != null) {
bound = binder.setViewValue(v, data, text);
}
if (!bound) {
if (v instanceof Checkable) {
if (data instanceof Boolean) {
((Checkable) v).setChecked((Boolean) data);
} else if (v instanceof TextView) {
setViewText((TextView) v, text);
} else {
throw new IllegalStateException(v.getClass().getName() +
" should be bound to a Boolean, not a " +
(data == null ? "<unknown type>" : data.getClass()));
}
} else if (v instanceof TermView) {
if(text.length()==10) {
int year = Integer.parseInt(text.substring(0,4));
if(text.substring(5, 7).equals("04")) {
setViewText((TextView) v, res.getString(R.string.summerterm) + " " + year);
}
else {
setViewText((TextView) v, res.getString(R.string.winterterm) + " " + year + "/" + (year+1));
}
}
else {
setViewText((TextView) v, text);
}
} else if (v instanceof TextView) {
setViewText((TextView) v, text);
} else if (v instanceof ImageView) {
if (data instanceof Integer) {
setViewImage((ImageView) v, (Integer) data);
} else {
setViewImage((ImageView) v, text);
}
} else {
throw new IllegalStateException(v.getClass().getName() + " is not a " +
" view that can be bounds by this SimpleAdapter");
}
}
}
}
}
}