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 implements
		Filterable, 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);

	}

	@Override
	public int getCount() {
		return list.size();
	}

	@Override
	public Object getItem(int position) {
		return list.get(position);
	}

	@Override
	public long getItemId(int position) {
		return position;
	}

	class ViewHolder {
		LinearLayout alphalayout;
		TextView alphaTextView;
		TextView name;
	}

	@Override
	public 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;
	}

	@Override
	public int getItemViewType(int position) {
		return position;
	}

	@Override
	public Filter getFilter() {
		if (null == myFilter) {
			myFilter = new MyFilter();
		}
		return myFilter;
	}

	class MyFilter extends Filter {

		List<CountryRegion> strsContains;

		public MyFilter() {
			super();
			strsContains = list;
		}

		@Override
		protected 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;
		}

		@Override
		protected 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();
			}
		}
	}

	@Override
	public 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;
	}

	@Override
	public int getSectionForPosition(int position) {
		// TODO Auto-generated method stub
		return 0;
	}

	@Override
	public Object[] getSections() {
		// TODO Auto-generated method stub
		return 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());}