ListView未在“搜索”过滤器功能上进行更新(ListView is not updating on Search filter functionality)

我想在android中的ListView上应用搜索过滤器功能。我已经创建了CustomBaseAdapter适配器。当我在输入搜索中输入publishResults arrayList ，我在logcat中的publishResults arrayList中获得了数组列表。 butListView没有更新。

CustomBaseAdapter代码，

public class CustomBaseAdapter extends BaseAdapter implements Filterable{ Context context; List<RowItem> rowItems; List<String> arrayList; List<String> mOriginalValues; // Original Values LayoutInflater inflater; public CustomBaseAdapter( Context context, List<RowItem> items) { this.context = context; this.rowItems = items; //int position = 2; arrayList = new ArrayList<String>(); mOriginalValues=new ArrayList<String>(); for(int i = 0; i < rowItems.size(); i++) { RowItem rowItem = (RowItem)getItem(i); mOriginalValues.add(rowItem.getTitle()); } Log.d(mOriginalValues.toString(),"mOriginalValues"); } /*private view holder class*/ private class ViewHolder { ImageView imageView; TextView txtTitle; } public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE); if (convertView == null) { convertView = mInflater.inflate(R.layout.list_item, null); holder = new ViewHolder(); holder.txtTitle = (TextView) convertView.findViewById(R.id.label); holder.imageView = (ImageView) convertView.findViewById(R.id.icon); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } RowItem rowItem = (RowItem) getItem(position); holder.txtTitle.setText(rowItem.getTitle()); holder.imageView.setImageResource(rowItem.getImageId()); return convertView; } @Override public int getCount() { return rowItems.size(); } @Override public RowItem getItem(int position) { return rowItems.get(position); } @Override public long getItemId(int position) { return rowItems.indexOf(getItem(position)); } @Override public Filter getFilter() { Filter filter = new Filter() { @SuppressWarnings("unchecked") @Override protected void publishResults(CharSequence constraint,FilterResults results) { Log.d(results.values.toString(),"publishResults"); arrayList = (List<String>) results.values; // has the filtered values Log.d(results.values.toString(),"publishResults arrayList"); notifyDataSetChanged(); // notifies the data with new filtered values } @Override protected FilterResults performFiltering(CharSequence constraint) { FilterResults results = new FilterResults(); List<String> arrayList = new ArrayList<String>();// Holds the results of a filtering operation in values List<String> FilteredArrList = new ArrayList<String>(); if (mOriginalValues == null) { // mOriginalValues = new ArrayList<String>(arrayList); // saves the original data in mOriginalValues mOriginalValues.addAll(arrayList); } if (constraint == null || constraint.length() == 0) { // set the Original result to return results.count = mOriginalValues.size(); results.values = mOriginalValues; } else { constraint = constraint.toString().toLowerCase(); Log.d(constraint.toString().toLowerCase(),"constraint"); Log.d(mOriginalValues.toString(),"mOriginalValues"); for (int i = 0; i < mOriginalValues.size(); i++) { String data = mOriginalValues.get(i); if (data.toLowerCase().contains(constraint.toString())) { Log.d(data,"Filtered data"); FilteredArrList.add(data); } Log.d(FilteredArrList.toString(),"FilteredArrList"); } // set the Filtered result to return results.count = FilteredArrList.size(); results.values = FilteredArrList; } return results; } }; return filter; } }

我的Activity onCreate方法如下，

@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); listView = (ListView) findViewById(R.id.list); rowItems = new ArrayList<RowItem>(); for (int i = 0; i < titles.length; i++) { RowItem item = new RowItem(images[i],titles[i], TypeName[i] ); rowItems.add(item); } listView = (ListView)findViewById(R.id.list); inputSearch = (EditText) findViewById(R.id.inputSearch); adapter = new CustomBaseAdapter(this, rowItems); listView.setAdapter(adapter); listView.setOnItemClickListener(this); // Assign adapter to ListViez inputSearch.addTextChangedListener(new TextWatcher() { @Override public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) { // When user changed the Text MainActivity.this.adapter.getFilter().filter(cs.toString()); } @Override public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { // TODO Auto-generated method stub } @Override public void afterTextChanged(Editable arg0) { // TODO Auto-generated method stub } }); }

I want to apply search filter functionality on my ListView in android. i have create CustomBaseAdapter adapter. When i type something in input search i got the array list in publishResults arrayList in my logcat. butListView is not being update.

CustomBaseAdapter code,

onCreate method in my Activity as bellow,

最满意答案

在适配器的构造函数（）中进行以下更改，

//int position = 2; arrayList = new ArrayList<String>(); mOriginalValues=new ArrayList<String>(); for(int i = 0; i < rowItems.size(); i++) { RowItem rowItem = (RowItem)getItem(i); mOriginalValues.add(rowItem.getTitle()); arrayList.add(rowItem.getTitle()); } Log.d(mOriginalValues.toString(),"mOriginalValues");

在getView（）中进行以下更改，

if(arrayList == null || arrayList.size() == 0){ arrayList = mOriginalValues; } for(String Title : arrayList) if(rowItem.getTitle().equals(Title)){ holder.txtTitle.setText(rowItem.getTitle()); holder.imageView.setImageResource(rowItem.getImageId()); } }

如果还有任何问题，请检查一下，

public class CustomBaseAdapter extends BaseAdapter implements Filterable { Context context; List<RowItem> rowItems; List<L> mOriginalValues; // Original Values LayoutInflater inflater; public CustomBaseAdapter(Context context, List<RowItem> items) { this.context = context; this.rowItems = items; //int position = 2; mOriginalValues = new ArrayList<>(); if(rowItems!=null) { this.mOriginalValues.addAll(rowItems); } } /*private view holder class*/ private class ViewHolder { ImageView imageView; TextView txtTitle; } public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE); if (convertView == null) { convertView = mInflater.inflate(R.layout.list_item, null); holder = new ViewHolder(); holder.txtTitle = (TextView) convertView.findViewById(R.id.label); holder.imageView = (ImageView) convertView.findViewById(R.id.icon); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } holder.txtTitle.setText(rowItems.get(position).getTitle()); holder.imageView.setImageResource(rowItems.get(position).getImageId()); return convertView; } @Override public int getCount() { return rowItems.size(); } @Override public RowItem getItem(int position) { return rowItems.get(position); } @Override public long getItemId(int position) { return rowItems.indexOf(getItem(position)); } @Override public Filter getFilter() { Filter filter = new Filter() { @SuppressWarnings("unchecked") @Override protected void publishResults(CharSequence constraint,FilterResults results) { Log.d(results.values.toString(),"publishResults"); rowItems = (List<RowItem>) results.values; // has the filtered values Log.d(results.values.toString(),"publishResults arrayList"); notifyDataSetChanged(); // notifies the data with new filtered values } @Override protected FilterResults performFiltering(CharSequence constraint) { FilterResults results = new FilterResults(); List<RowItem> FilteredArrList = new ArrayList<>(); if (constraint == null || constraint.length() == 0) { // set the Original result to return results.count = mOriginalValues.size(); results.values = mOriginalValues; } else { constraint = constraint.toString().toLowerCase(); Log.d(constraint.toString().toLowerCase(),"constraint"); Log.d(mOriginalValues.toString(),"mOriginalValues"); for (int i = 0; i < mOriginalValues.size(); i++) { String data = mOriginalValues.get(i).getTitle(); if (data.toLowerCase().contains(constraint.toString())) { Log.d(data,"Filtered data"); FilteredArrList.add(mOriginalValues.get(i)); } Log.d(FilteredArrList.toString(),"FilteredArrList"); } // set the Filtered result to return results.count = FilteredArrList.size(); results.values = FilteredArrList; } return results; } }; return filter; } }

In Constructor() of adapter make following changes,

In getView() make following changes,

If there is still any problem check this too,

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