问题描述
- 为什么 autocompletetextview
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为什么 autocompletetextview 用了直接写的 adapter showdropdown 没有效果了啊
下面是我写的adapterpackage com.depart.adapter; import java.util.ArrayList; import java.util.List; import android.content.Context; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.Filter; import android.widget.Filterable; import android.widget.ImageView; import android.widget.TextView; import com.depart.autocomplete.R; import com.depart.db.HistorySQLiteOpenHelper; public class AutoCompleteAdapter extends BaseAdapter implements Filterable{ private Context context; private ArrayFilter mFilter; private ArrayList<String> mOriginalValues;//所有的Item private List<String> mObjects;//过滤后的item private final Object mLock = new Object(); private int maxMatch=10;//最多显示多少个选项,负数表示全部 public AutoCompleteAdapter(Context context,ArrayList<String> mOriginalValues,int maxMatch){ this.context=context; this.mOriginalValues=mOriginalValues; this.maxMatch=maxMatch; } public AutoCompleteAdapter(){ } @Override public Filter getFilter() { // TODO Auto-generated method stub if (mFilter == null) { mFilter = new ArrayFilter(); } return mFilter; } public void refresh(){ notifyDataSetChanged(); } private class ArrayFilter extends Filter { @Override protected FilterResults performFiltering(CharSequence prefix) { // TODO Auto-generated method stub FilterResults results = new FilterResults(); // if (mOriginalValues == null) { // synchronized (mLock) { // mOriginalValues = new ArrayList<String>(mObjects);// // } // } System.out.println("prefix:"+prefix); if (prefix == null || prefix.length() == 0) { synchronized (mLock) { Log.i("tag", "mOriginalValues.size="+mOriginalValues.size()); ArrayList<String> list = new ArrayList<String>(mOriginalValues); results.values = list; results.count = list.size(); return results; } } else { String prefixString = prefix.toString().toLowerCase(); if(prefixString==null){ prefixString="1"; } final int count = mOriginalValues.size(); final ArrayList<String> newValues = new ArrayList<String>(count); for (int i = 0; i < count; i++) { final String value = mOriginalValues.get(i); final String valueText = value.toLowerCase(); if(valueText.contains(prefixString)){//匹配所有 newValues.add(value); } // First match against the whole, non-splitted value /* if (valueText.startsWith(prefixString)) { //源码 ,匹配开头 newValues.add(value); } */ // else { // final String[] words = valueText.split(" ");//分隔符匹配,效率低 // final int wordCount = words.length; // // for (int k = 0; k < wordCount; k++) { // if (words[k].startsWith(prefixString)) { // newValues.add(value); // break; // } // } // } if(maxMatch>0){//有数量限制 if(newValues.size()>maxMatch-1){//不要太多 break; } } } results.values = newValues; results.count = newValues.size(); } return results; } @Override protected void publishResults(CharSequence constraint, FilterResults results) { // TODO Auto-generated method stub mObjects = (List<String>) results.values; if (results.count > 0) { notifyDataSetChanged(); } else { notifyDataSetInvalidated(); } } } @Override public int getCount() { // TODO Auto-generated method stub if(mObjects!=null){ return mObjects.size(); } return 0; } @Override public Object getItem(int position) { // TODO Auto-generated method stub //此方法有误,尽量不要使用 return mObjects.get(position); } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public View getView(final int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub ViewHolder holder = null; if(convertView==null){ holder=new ViewHolder(); LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView=inflater.inflate(R.layout.simple_list_item_for_autocomplete, null); holder.tv=(TextView)convertView.findViewById(R.id.simple_item_0); holder.iv=(ImageView)convertView.findViewById(R.id.simple_item_1); convertView.setTag(holder); }else{ holder = (ViewHolder) convertView.getTag(); } holder.tv.setText(mObjects.get(position)); holder.iv.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub String obj=mObjects.remove(position); mOriginalValues.remove(obj); /* Cursor c = new HistorySQLiteOpenHelper(context).getWritableDatabase(). query("history", new String []{"_id","name"}, "name = ? ", new String[]{obj}, null, null, null, null);*/ new HistorySQLiteOpenHelper(context).getWritableDatabase(). delete("history", "name = ? ", new String[]{obj}); notifyDataSetChanged(); } }); return convertView; } public void showd(){ } class ViewHolder { TextView tv; ImageView iv; } public ArrayList<String> getAllItems(){ return mOriginalValues; } }
时间: 2024-09-17 04:07:07