Android高仿百度地图公交与位置建议搜索（四）

朱雀 2022-08-13 12:47 152阅读 0赞

Android高仿百度地图公交与位置建议搜索  
  
转载请注明：[http://blog.csdn.net/smile5005/article/details/40475393][http_blog.csdn.net_smile5005_article_details_40475393]

最近自己在开发一个Android的app，由于需要主动搜索位置以及公交信息，所以想先借鉴一下百度地图的位置公交搜索模块，姑且先模仿百度地图来实现。  
  
1、UI布局文件如下：

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/common_background_color"
        android:orientation="vertical" >
        	 
       	<include
       		android:id="@+id/common_search_action_bar"
       		layout="@layout/baidu_search_action_bar" />
    
       	<ListView
       	    android:id="@+id/lv_position_list"
       	    android:layout_marginLeft="5dp"
       	    android:layout_marginRight="5dp"
       	    android:layout_marginTop="5dp"
       	    android:layout_marginBottom="5dp"
       	    android:layout_width="match_parent"
       	    android:layout_height="wrap_content" >
       	</ListView>
    
    </LinearLayout>

其中Include是自己写的一个共同的搜索模块的View，大家可以根据自己的具体项目来替换。  
  
2、Activity中代码如下：

package com.remind.ui;
    
    import java.util.ArrayList;
    import java.util.List;
    
    import com.baidu.mapapi.search.core.CityInfo;
    import com.baidu.mapapi.search.core.PoiInfo;
    import com.baidu.mapapi.search.core.PoiInfo.POITYPE;
    import com.baidu.mapapi.search.core.SearchResult;
    import com.baidu.mapapi.search.poi.OnGetPoiSearchResultListener;
    import com.baidu.mapapi.search.poi.PoiDetailResult;
    import com.baidu.mapapi.search.poi.PoiResult;
    import com.baidu.mapapi.search.poi.PoiSearch;
    import com.baidu.mapapi.search.sug.OnGetSuggestionResultListener;
    import com.baidu.mapapi.search.sug.SuggestionResult;
    import com.baidu.mapapi.search.sug.SuggestionSearch;
    import com.baidu.mapapi.search.sug.SuggestionSearchOption;
    import com.mr.remind.R;
    import com.remind.adapter.PoiResultAdapter;
    import com.remind.bean.MrPoiResult;
    import com.remind.config.Constant;
    import com.remind.db.AlarmColumn;
    import com.remind.db.DBHelper;
    import com.remind.db.PoiHistoryColumn;
    import com.remind.utils.LogUtils;
    import com.remind.widget.ClearEditText;
    
    import android.app.Activity;
    import android.database.Cursor;
    import android.os.Bundle;
    import android.text.Editable;
    import android.text.TextWatcher;
    import android.view.View;
    import android.widget.ListView;
    import android.widget.Toast;
    
    /**
     * 搜索细节的Activity;
     * @author Render
     */
    public class SearchDetailActivity extends Activity implements OnGetSuggestionResultListener{
    
    	private static final String TAG = "SearchDetailActivity";
    	
    	private SuggestionSearch mSuggestionSearch = null;   //百度地图建议搜索对象;
    	private ClearEditText mEditText;                     //自定义的一个Edit控件，也可以用标准的EditView替代.
    	private ListView mListView;
    	private PoiResultAdapter mPoiResultAdapter=null; //自定义的ListView适配器对象。
    	private List<MrPoiResult> mPoiResults=null;      //查询后的结果数据链表;其中MrPoiResult是自定义的Bean对象。
            private String mSearchName;
    	
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_search_detail);
    		
    		initView();
    		initData();
    	}
    	
    	private void initView(){
    		
    	       mEditText=(ClearEditText) findViewById(R.id.et_search);
    	       mListView=(ListView) findViewById(R.id.lv_position_list);
    	}
    	
    	private void initData(){
    		
    		mPoiResults=new ArrayList<MrPoiResult>();
    		mPoiResultAdapter=new PoiResultAdapter(this, mPoiResults);
    		mListView.setAdapter(mPoiResultAdapter);
    		
    		mSuggestionSearch = SuggestionSearch.newInstance();
    		mSuggestionSearch.setOnGetSuggestionResultListener(this);
    		
    		mEditText.addTextChangedListener(new TextWatcher() {
    			
    			@Override
    			public void onTextChanged(CharSequence s, int start, int before, int count) {
    				
    			}
    			
    			@Override
    			public void beforeTextChanged(CharSequence s, int start, int count,
    					int after) {
    			
    			}
    			
    			@Override
    			public void afterTextChanged(Editable s) {
    				
    				mSearchName=mEditText.getText().toString();
    				excuteSuggestionSearch();
    			}
    		});
    	}
    
    	/**
    	 * 开始执行建议搜索;
    	 */
    	private void excuteSuggestionSearch(){
    
    		mPoiResults.clear();
    		
    		//清空链表;
    		if(mSearchName.equals("")||mSearchName==null){
    			mPoiResultAdapter.updateListView(mPoiResults,null);
    			return;
    		}
    		
                    //根据输入的名称和城市进行建议搜索，建议搜索很强大，即使固定了城市，也可以搜索到别的地方。
    		mSuggestionSearch
    		.requestSuggestion((new SuggestionSearchOption())
    				.keyword(mSearchName).city(Constant.city));
    		
    	}
    	
    	@Override
    	public void onGetSuggestionResult(SuggestionResult res) {
    		
    		if (res == null || res.getAllSuggestions() == null) {
    			return;
    		}
    		
    		for (SuggestionResult.SuggestionInfo info : res.getAllSuggestions()) {
    			if (info.key != null){
    				MrPoiResult poiResult=new MrPoiResult();
    				
                                    //记录搜索到的城市，名称和地区;
    				poiResult.setCity(info.city);
    				poiResult.setName(info.key);
    				poiResult.setAddress(info.city+info.district);
    				
    				mPoiResults.add(poiResult);
    			}
    		}
    		mPoiResultAdapter.updateListView(mPoiResults,mSearchName);
    	}
    	
    	@Override
    	protected void onDestroy() {
    		
    	       mSuggestionSearch.destroy();
    	       super.onDestroy();
    	}
    	
    	@Override
    	protected void onSaveInstanceState(Bundle outState) {
    		super.onSaveInstanceState(outState);
    	}
    
    	@Override
    	protected void onRestoreInstanceState(Bundle savedInstanceState) {
    		super.onRestoreInstanceState(savedInstanceState);
    	}
    }

上文的Activity主要是进行简单的建议搜索，并把搜索的结果显示在ListVIew中，接下来我们看看ListView中的适配器对象，由于在项目中我们会经常用到适配器对象，因此这里把适配器对象写成了一个模板基类，先看看基类适配器对象。  
  
3、适配器基类对象

package com.remind.adapter.base;
    
    import java.util.LinkedList;
    import java.util.List;
    
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.BaseAdapter;
    
    public abstract class AdapterBase<T> extends BaseAdapter {
    	
    	private final List<T> mList = new LinkedList<T>();
    	
    	public List<T> getList(){
    		return mList;
    	}
    	
    	public void appendToList(List<T> list) {
    		if (list == null) {
    			return;
    		}
    		mList.addAll(list);
    		notifyDataSetChanged();
    	}
    
    	public void appendToTopList(List<T> list) {
    		if (list == null) {
    			return;
    		}
    		mList.addAll(0, list);
    		notifyDataSetChanged();
    	}
    
    	public void clear() {
    		mList.clear();
    		notifyDataSetChanged();
    	}
    	@Override
    	public int getCount() {
    		
    		if(mList!=null){
    			return mList.size();
    		}
    		return 0;
    	}
    
    	@Override
    	public Object getItem(int position) {
    		if(position > mList.size()-1){
    			return null;
    		}
    		return mList.get(position);
    	}
    
    	@Override
    	public long getItemId(int position) {
    		return position;
    	}
    
    	@Override
    	public View getView(int position, View convertView, ViewGroup parent) {
    		if (position == getCount() - 1) {
    			onReachBottom();
    		}
    		return getExView(position, convertView, parent);
    	}
    	
            // 两个基类对象，由子类进行扩展;
    	protected abstract View getExView(int position, View convertView, ViewGroup parent);
    	protected abstract void onReachBottom();
    }

4、ListView中的适配器对象，代码如下：

package com.remind.adapter;
    
    import java.util.List;
    
    import android.content.Context;
    import android.graphics.Color;
    import android.text.Spannable;
    import android.text.SpannableStringBuilder;
    import android.text.style.ForegroundColorSpan;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.ImageView;
    import android.widget.RelativeLayout;
    import android.widget.TextView;
    
    import com.mr.remind.R;
    import com.remind.adapter.base.AdapterBase;
    import com.remind.bean.MrPoiResult;
    
    public class PoiResultAdapter extends AdapterBase<MrPoiResult>{
    
    	private Context ct;
    	private ViewHolder viewHolder=null;
    	private String mSearchKey;        //搜索的关键字对象;
    	
    	public PoiResultAdapter(Context ct,List<MrPoiResult> postions){
    		this.ct=ct;
    		appendToList(postions);
    	}
    
    	public void updateListView(List<MrPoiResult> datas,String searchKey){
    
    		mSearchKey=searchKey;
    		
    		clear();
    		appendToList(datas);
    		notifyDataSetChanged();
    	}
    	
    	static class ViewHolder {
    		
    		ImageView imageView;
    		TextView tvName;
    		TextView tvAddress;
    	}
    
    	@Override
    	protected View getExView(int position, View convertView, ViewGroup parent) {
    		
    		MrPoiResult poiResult=getList().get(position);
    		
    		if (convertView == null) {
    
    			convertView = LayoutInflater.from(ct).inflate(R.layout.item_poi_result, null);
    			viewHolder = new ViewHolder();
    		
    			viewHolder.imageView = (ImageView) convertView.findViewById(R.id.iv_postion_icon);
    			viewHolder.tvName=(TextView)convertView.findViewById(R.id.tv_position_name);
    			viewHolder.tvAddress=(TextView)convertView.findViewById(R.id.tv_position_address);
    			
    			convertView.setTag(viewHolder);
    			
    		} else{
    			viewHolder = (ViewHolder) convertView.getTag();
    		}
    		
                    //该部分主要是针对于搜索的结果，用不同的颜色标记出和关键字相同的部分。
    		String name=poiResult.getName();
    		int nBegIndex=name.indexOf(mSearchKey);
    		int nEndIndex=nBegIndex+mSearchKey.length();
    		
    		if(nBegIndex!=-1)
    		{
    			//设置指定位置文字的颜色
    			SpannableStringBuilder style=new SpannableStringBuilder(name);   
    			style.setSpan(new ForegroundColorSpan(Color.rgb(118, 173, 255)),
    					nBegIndex,nEndIndex,Spannable.SPAN_EXCLUSIVE_INCLUSIVE);    
    			viewHolder.tvName.setText(style);
    		}
                    
                    //下面部分主要是对于如果搜索到的地址为空时，把搜索的名字动态居中显示。
    		if(poiResult.getAddress()==null||poiResult.getAddress().equals("")){
    			
    			RelativeLayout.LayoutParams lParams=
    					new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
    					RelativeLayout.LayoutParams.WRAP_CONTENT);
    			
    			lParams.addRule(RelativeLayout.CENTER_VERTICAL);
    			viewHolder.tvName.setLayoutParams(lParams);
    			viewHolder.tvAddress.setText("");
    			
    		}else{
    			
    			RelativeLayout.LayoutParams lParams=
    					new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
    					RelativeLayout.LayoutParams.WRAP_CONTENT);
    			
    			lParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
    			viewHolder.tvName.setLayoutParams(lParams);
    			viewHolder.tvAddress.setText(poiResult.getAddress());
    		}
    
    		return convertView;
    	}
    
    	@Override
    	protected void onReachBottom() {
    	
    	}
    }

5、建议搜索结果如下，分别进行了位置搜索和公交搜索，结果如下：  
  
![SouthEast][] ![SouthEast 1][]

[http_blog.csdn.net_smile5005_article_details_40475393]: http://blog.csdn.net/smile5005/article/details/40475393
[SouthEast]: https://img-blog.csdn.net/20141026120543625?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvc21pbGU1MDA1/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast
[SouthEast 1]: /images/20220810/cdc92b02417f432792a29ce2bc287fcc.png