android ListView快速下拉跟搜索

LocationSelectAutoTextListAdapater

package com.reacnn.android.assistadpter;import java.util.ArrayList;import java.util.Collections;import java.util.HashMap;import java.util.List;import java.util.Set;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Filter;import android.widget.Filterable;import android.widget.LinearLayout;import android.widget.SectionIndexer;import android.widget.TextView;import com.reacnn.android.R;import com.reacnn.android.bean.CountryRegion;import com.reacnn.android.utils.LogUtil;public class LocationSelectAutoTextListAdapater extends BaseAdapter implementsFilterable, SectionIndexer {private LayoutInflater inflater;private List<CountryRegion> list;private ArrayList<CountryRegion> mOriginalValues;private HashMap<String, Integer> alphaIndexer;private String[] sections;MyFilter myFilter;private final Object mLock = new Object();private final String TAG = "LocationSelectAutoTextListAdapater";public LocationSelectAutoTextListAdapater(Context context,List<CountryRegion> list) {this.inflater = LayoutInflater.from(context);this.list = list;this.alphaIndexer = new HashMap<String, Integer>();this.sections = new String[list.size()];for (int i = 0; i < list.size(); i++) {String name = list.get(i).getAlphaString();if (!alphaIndexer.containsKey(name)) {alphaIndexer.put(name, i);}}Set<String> sectionLetters = alphaIndexer.keySet();ArrayList<String> sectionList = new ArrayList<String>(sectionLetters);Collections.sort(sectionList);sections = new String[sectionList.size()];sectionList.toArray(sections);}@Overridepublic int getCount() {return list.size();}@Overridepublic Object getItem(int position) {return list.get(position);}@Overridepublic long getItemId(int position) {return position;}class ViewHolder {LinearLayout alphalayout;TextView alphaTextView;TextView name;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {ViewHolder holder;if (convertView == null) {convertView = inflater.inflate(R.layout.layout_item_selectlocation,null);holder = new ViewHolder();holder.alphalayout = (LinearLayout) convertView.findViewById(R.id.alphalayout);holder.name = (TextView) convertView.findViewById(R.id.locationname);holder.alphaTextView = (TextView) convertView.findViewById(R.id.locationalpha);convertView.setTag(holder);} else {holder = (ViewHolder) convertView.getTag();}CountryRegion cv = list.get(position);holder.name.setText(cv.getRegionString());String currentStr = cv.getAlphaString();String previewStr = (position - 1) >= 0 ? list.get(position - 1).getAlphaString() : " ";if (!previewStr.equals(currentStr)) {holder.alphalayout.setVisibility(View.VISIBLE);holder.alphaTextView.setText(currentStr);} else {holder.alphalayout.setVisibility(View.GONE);}return convertView;}@Overridepublic int getItemViewType(int position) {return position;}@Overridepublic Filter getFilter() {if (null == myFilter) {myFilter = new MyFilter();}return myFilter;}class MyFilter extends Filter {List<CountryRegion> strsContains;public MyFilter() {super();strsContains = list;}@Overrideprotected FilterResults performFiltering(CharSequence constraint) {LogUtil.e(TAG, "constraint=" + constraint, false);FilterResults results = new FilterResults();if (mOriginalValues == null) {synchronized (mLock) {mOriginalValues = new ArrayList<CountryRegion>(list);}}if (constraint == null || constraint.length() == 0) {synchronized (mLock) {ArrayList<CountryRegion> list = new ArrayList<CountryRegion>(mOriginalValues);results.values = list;results.count = list.size();}} else {String prefixString = constraint.toString().toLowerCase();final ArrayList<CountryRegion> values = mOriginalValues;final int count = values.size();final ArrayList<CountryRegion> newValues = new ArrayList<CountryRegion>(count);for (int i = 0; i < count; i++) {final CountryRegion value = (CountryRegion) values.get(i);if (value.getRegionString().contains(prefixString)) {newValues.add(value);}}results.values = newValues;results.count = newValues.size();}return results;}@Overrideprotected void publishResults(CharSequence constraint,FilterResults results) {// 重新将与适配器相关联的List重赋值一下list = (List<CountryRegion>) results.values;if (results.count > 0) {notifyDataSetChanged();} else {notifyDataSetInvalidated();}}}@Overridepublic int getPositionForSection(int section) {CountryRegion mContent;String l;if (section == '!') {return 0;} else {for (int i = 0; i < getCount(); i++) {mContent = (CountryRegion) list.get(i);l = mContent.getAlphaString();char firstChar = l.toUpperCase().charAt(0);if (firstChar == section) {return i + 1;}}}mContent = null;l = null;return -1;}@Overridepublic int getSectionForPosition(int position) {// TODO Auto-generated method stubreturn 0;}@Overridepublic Object[] getSections() {// TODO Auto-generated method stubreturn null;}}

 

SideBar

 

package com.reacnn.android.view;import com.reacnn.android.assistadpter.LocationSelectAutoTextListAdapater;import android.content.Context;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.Paint.Style;import android.graphics.drawable.ColorDrawable;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import android.widget.HeaderViewListAdapter;import android.widget.ListView;import android.widget.SectionIndexer;import android.widget.TextView;public class SideBar extends View {private char[] l;private SectionIndexer sectionIndexter = null;private ListView list;private TextView mDialogText;private int color = 0xff858c94;public SideBar(Context context) {super(context);init();}public SideBar(Context context, AttributeSet attrs) {super(context, attrs);init();}private void init() {l = new char[] { '#', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J','K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V','W', 'X', 'Y', 'Z' };}public SideBar(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);init();}public void setListView(ListView _list) {list = _list;HeaderViewListAdapter ha = (HeaderViewListAdapter) _list.getAdapter();LocationSelectAutoTextListAdapater ad = (LocationSelectAutoTextListAdapater) ha.getWrappedAdapter();sectionIndexter = (SectionIndexer) ad;}public void setTextView(TextView mDialogText) {this.mDialogText = mDialogText;}public boolean onTouchEvent(MotionEvent event) {super.onTouchEvent(event);int i = (int) event.getY();int idx = i / (getMeasuredHeight() / l.length);if (idx >= l.length) {idx = l.length - 1;} else if (idx < 0) {idx = 0;}if (event.getAction() == MotionEvent.ACTION_DOWN|| event.getAction() == MotionEvent.ACTION_MOVE) {mDialogText.setVisibility(View.VISIBLE);mDialogText.setText(String.valueOf(l[idx]));mDialogText.setTextSize(34);if (sectionIndexter == null) {sectionIndexter = (SectionIndexer) list.getAdapter();}int position = sectionIndexter.getPositionForSection(l[idx]);if (position == -1) {return true;}list.setSelection(position);} else {mDialogText.setVisibility(View.INVISIBLE);}if (event.getAction() == MotionEvent.ACTION_UP) {setBackgroundDrawable(new ColorDrawable(0x00000000));}return true;}protected void onDraw(Canvas canvas) {Paint paint = new Paint();paint.setColor(color);paint.setTextSize(12);paint.setStyle(Style.FILL);paint.setTextAlign(Paint.Align.CENTER);float widthCenter = getMeasuredWidth() / 2;if (l.length > 0) {float height = getMeasuredHeight() / l.length;for (int i = 0; i < l.length; i++) {canvas.drawText(String.valueOf(l[i]), widthCenter, (i + 1)* height, paint);}}this.invalidate();super.onDraw(canvas);}}

 

indexBar.setTextView(mDialogText);         mDialogText.setVisibility(View.INVISIBLE);         indexBar.setListView(mNormalListView);搜索:if (adapter != null&& (StringUtils.IsEmptyOrNull(this.txtSearchKeyText.getText().toString()) != true)) {adapter.getFilter().filter(this.txtSearchKeyText.getText().toString());}