2
我一直在爲此苦苦掙扎，儘管尋找了一段時間，卻找不到答案。我有一個自定義的數組適配器，它使用自定義對象POI填充我的列表視圖。使用自定義ArrayAdapter進行過濾
package com.WasserSportLotse;
import java.util.ArrayList;
import android.content.Context;
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;
class poiAdapter extends ArrayAdapter<POI>{
private ArrayList<POI> items;
private Context mContext;
public ArrayList<POI> allItems;
private Filter filter;
public ArrayList<POI> filtered;
public poiAdapter(Context context, int textViewResourceId, ArrayList<POI> items){
super(context, textViewResourceId, items);
mContext = context;
this.items = items;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.list_items, null);
}
POI poi = items.get(position);
if (poi != null) {
TextView mDistanceTextView = (TextView) v.findViewById(R.id.listitems_distancetxt);
TextView mNameTextView = (TextView) v.findViewById(R.id.listitems_nametxt);
TextView mCategoryTextView = (TextView) v.findViewById(R.id.listitems_categorytxt);
if (mDistanceTextView != null) {
mDistanceTextView.setText(poi.getDistance()+"km");
}
if(mNameTextView != null){
mNameTextView.setText(poi.getName());
}
if(mCategoryTextView != null){
mCategoryTextView.setText(poi.getType());
setImage(poi.getType(), v);
}
}
return v;
}
private void setImage(String type, View v) {
if ("shopping".equals(type)){
ImageView mImage = (ImageView) v.findViewById(R.id.imageView1);
mImage.setImageResource(R.drawable.shopping);
}
if ("liegestelle".equals(type)){
ImageView mImage = (ImageView) v.findViewById(R.id.imageView1);
mImage.setImageResource(R.drawable.liegestelle);
}
if ("restaurant".equals(type)){
ImageView mImage = (ImageView) v.findViewById(R.id.imageView1);
mImage.setImageResource(R.drawable.restaurant);
}
if ("schleuse".equals(type)){
ImageView mImage = (ImageView) v.findViewById(R.id.imageView1);
mImage.setImageResource(R.drawable.schleuse);
}
if ("verein".equals(type)){
ImageView mImage = (ImageView) v.findViewById(R.id.imageView1);
mImage.setImageResource(R.drawable.verein);
}
if ("tankstelle".equals(type)){
ImageView mImage = (ImageView) v.findViewById(R.id.imageView1);
mImage.setImageResource(R.drawable.tankstelle);
}
if ("faekalien".equals(type)){
ImageView mImage = (ImageView) v.findViewById(R.id.imageView1);
mImage.setImageResource(R.drawable.faekalien);
}
if ("werkstatt".equals(type)){
ImageView mImage = (ImageView) v.findViewById(R.id.imageView1);
mImage.setImageResource(R.drawable.werkstatt);
}
if ("uebernachtung".equals(type)){
ImageView mImage = (ImageView) v.findViewById(R.id.imageView1);
mImage.setImageResource(R.drawable.uebernachtung);
}
}
@Override
public Filter getFilter()
{
if(filter == null)
filter = new POITypeFilter();
return filter;
}
private class POITypeFilter extends Filter
{
@Override
protected FilterResults performFiltering(CharSequence constraint) {
// NOTE: this function is *always* called from a background thread, and
// not the UI thread.
constraint = constraint.toString().toLowerCase();
FilterResults result = new FilterResults();
if(constraint != null && constraint.toString().length() > 0)
{
ArrayList<POI> filt = new ArrayList<POI>();
ArrayList<POI> lItems = new ArrayList<POI>();
synchronized (this)
{
lItems.addAll(items);
}
for(int i = 0, l = lItems.size(); i < l; i++)
{
POI m = lItems.get(i);
if(m.getType().toLowerCase().contains(constraint))
filt.add(m);
}
result.count = filt.size();
result.values = filt;
}
else
{
synchronized(this)
{
result.values = items;
result.count = items.size();
}
}
return result;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
// NOTE: this function is *always* called from the UI thread.
filtered = (ArrayList<POI>)results.values;
notifyDataSetChanged();
clear();
for(int i = 0, l = filtered.size(); i < l; i++)
add(filtered.get(i));
notifyDataSetInvalidated();
}
}
}
我想重寫getFilter方法，所以我可以通過POI.type過濾每個POI並更新listView。我打電話給getFilter像這樣
@Override
protected void onRestart() {
super.onRestart();
mAdapter.getFilter().filter(getFilterSettings());
mAdapter.notifyDataSetChanged();
}
這只是返回一個黑色的屏幕，就好像所有東西都被過濾掉了。我把斷點放在getFilter上，但是應用程序確實進入了它，所以我不確定應用程序是否使用這個代碼。有什麼明顯的我失蹤了？
更新 - 在那裏的一半
我在這裏有幾個問題。它看起來應用程序沒有調用getFilter作爲不停在那裏的斷點。實際上，Davlik虛擬機只能使用這麼多的中斷點（記住它並不是很多）。當我使用我想要分析的代碼時，它停止使用斷點。我覺得我非常不走運。
然後哪里哪里一些問題code.I改變
private ArrayList<POI> items;
公衆。所以它可以被讀入一個新的數組，並過濾結果。現在只需要弄清楚如何使arrayAdapter再次過濾，但是在原始數組上。哇，這是一個漫長的過程。