最新基于高德地图的android进阶开发（6）感兴趣点（POI）周边搜索源码浅析

1.今天研究了一下高德地图的POI周边搜索，以及改变下初始定位，主要涉及关键字搜索和以及marker展示，还包括搜索结果信息的获取。

2.下面直接上源码，上面都已注释

布局文件:poi_around_search.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"                android:layout_width="match_parent"                android:layout_height="match_parent"                android:gravity="center_horizontal" >    <RelativeLayout        android:layout_width="match_parent"        android:layout_height="match_parent" >        <com.amap.api.maps.MapView            android:id="@+id/mapView"            android:layout_width="match_parent"            android:layout_height="match_parent"            android:layout_alignParentLeft="true"            android:layout_alignParentTop="true" >        </com.amap.api.maps.MapView>    </RelativeLayout>    <RelativeLayout        android:id="@+id/search_bar_layout"        android:layout_width="match_parent"        android:layout_height="48dp"        android:layout_marginLeft="@dimen/offset_title"        android:layout_marginRight="@dimen/offset_title"        android:layout_marginStart="@dimen/offset_title"        android:layout_marginTop="@dimen/offset_title"        android:gravity="center_vertical"        android:orientation="horizontal" >        <TextView            android:id="@+id/btn_search"            android:layout_width="wrap_content"            android:layout_height="match_parent"            android:layout_alignParentEnd="true"            android:layout_alignParentRight="true"            android:layout_centerVertical="true"            android:background="@drawable/offlinearrow_tab2_pressed"            android:clickable="true"            android:gravity="center"            android:paddingEnd="12dp"            android:paddingLeft="12dp"            android:paddingRight="12dp"            android:paddingStart="12dp"            android:text="搜索"            android:textColor="@color/white"            android:textSize="12dp"/>        <LinearLayout            android:layout_width="match_parent"            android:layout_height="match_parent"            android:layout_centerVertical="true"            android:layout_toLeftOf="@+id/btn_search"            android:layout_toStartOf="@+id/btn_search"            android:background="@drawable/search_input_half"            android:clickable="true"            android:gravity="center_vertical" >            <EditText                android:id="@+id/input_edittext"                android:layout_width="match_parent"                android:layout_height="match_parent"                android:drawableLeft="@drawable/search_input"                android:background="@color/transparent"                android:hint="请输入搜索关键字"                android:textColorHint="@color/darkgrey"                android:singleLine="true"                android:textColor="@color/gary"                android:textSize="14sp" />        </LinearLayout>    </RelativeLayout>    <RelativeLayout        android:id="@+id/poi_detail"        android:layout_width="match_parent"        android:layout_height="80dp"        android:layout_alignParentBottom="true"        android:background="@drawable/border_bg"        android:visibility="gone">        <TextView            android:id="@+id/poi_name"            android:layout_width="wrap_content"            android:layout_height="30dp"            android:layout_alignParentLeft="true"            android:layout_alignParentStart="true"            android:layout_marginLeft="12dp"            android:layout_marginStart="12dp"            android:ellipsize="end"            android:gravity="center_vertical"            android:singleLine="true"            android:textColor="#5566b8"            android:textSize="15sp" />        <TextView            android:id="@+id/poi_address"            android:layout_width="wrap_content"            android:layout_height="35dp"            android:layout_alignParentLeft="true"            android:layout_alignParentStart="true"            android:layout_below="@id/poi_name"            android:layout_marginLeft="12dp"            android:layout_marginStart="12dp"            android:gravity="center_vertical"            android:singleLine="true"            android:textColor="#333333"            android:textSize="15sp" />    </RelativeLayout></RelativeLayout>

3.代码文件：PoiAroundSearch.java

package com.dragon.arnav.basicFuction.locationMap;import android.app.Activity;import android.graphics.BitmapFactory;import android.graphics.Color;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.EditText;import android.widget.RelativeLayout;import android.widget.TextView;import com.amap.api.maps.AMap;import com.amap.api.maps.CameraUpdateFactory;import com.amap.api.maps.MapView;import com.amap.api.maps.model.BitmapDescriptor;import com.amap.api.maps.model.BitmapDescriptorFactory;import com.amap.api.maps.model.CircleOptions;import com.amap.api.maps.model.LatLng;import com.amap.api.maps.model.LatLngBounds;import com.amap.api.maps.model.Marker;import com.amap.api.maps.model.MarkerOptions;import com.amap.api.services.core.LatLonPoint;import com.amap.api.services.core.PoiItem;import com.amap.api.services.core.SuggestionCity;import com.amap.api.services.poisearch.PoiResult;import com.amap.api.services.poisearch.PoiSearch;import com.dragon.arnav.R;import com.dragon.arnav.basicFuction.util.ToastUtil;import java.util.ArrayList;import java.util.List;/** * This file created by dragon on 2016/8/4 13:19, * belong to com.dragon.arnav.basicFuction.locationMap . */public class PoiAroundSearch extends Activity implements OnClickListener,AMap.OnMapClickListener,        AMap.OnInfoWindowClickListener,AMap.InfoWindowAdapter,AMap.OnMarkerClickListener,PoiSearch.OnPoiSearchListener {    private MapView mapView;    private AMap mAMap;//地图对象    private PoiResult poiResult;//the result of the poi    private int currentPage = 0;//the page start with 0    private PoiSearch.Query query;//poi query    //当前定位在深圳市南山区，这个经纬度应该是经过偏移的，具体原因，相信你懂的    private LatLonPoint lp=new LatLonPoint(22.528402,113.938963);    private Marker locationMarker;//选择点    private Marker detailMarker;    private Marker mlastMarker;    private PoiSearch poiSearch;    private myPoiOverlay poiOverlay;//poi图层    private List<PoiItem> poiItems;//poi数据    private PoiItem mPoi;    private RelativeLayout mPoiDetail;    private TextView mPoiName,mPoiAddress;    private String keyWord = "";    private EditText mSearchText;    @Override    protected void onCreate(Bundle savedInstanceState){        super.onCreate(savedInstanceState);        setContentView(R.layout.poi_around_search);//        基本操作        mapView = (MapView)findViewById(R.id.mapView);        mapView.onCreate(savedInstanceState);        init();    }//AMap对象的初始化    private void init(){        if(mAMap == null){            mAMap = mapView.getMap();//            AMap对象的监事件            mAMap.setOnMapClickListener(this);            mAMap.setOnMarkerClickListener(this);            mAMap.setOnInfoWindowClickListener(this);            mAMap.setInfoWindowAdapter(this);//            获取相关控件            TextView searchButton = (TextView)findViewById(R.id.btn_search);            searchButton.setOnClickListener(this);//初始位置标记            locationMarker = mAMap.addMarker(new MarkerOptions().anchor(0.5f,0.5f).icon(BitmapDescriptorFactory            .fromBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.point4))).position(new LatLng(lp.getLatitude(),lp.getLongitude())));            locationMarker.showInfoWindow();        }        setup();//        显示摄像头的大小        mAMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(lp.getLatitude(),lp.getLongitude()),14));    }    private void setup(){        mPoiDetail = (RelativeLayout)findViewById(R.id.poi_detail);        mPoiDetail.setOnClickListener(new OnClickListener(){            @Override            public void onClick(View v){            }        });        mPoiName =(TextView)findViewById(R.id.poi_name);        mPoiAddress = (TextView)findViewById(R.id.poi_address);        mSearchText = (EditText)findViewById(R.id.input_edittext);    }//    begin poi serch    protected void doSearchQuery(){        //Trim() 函数的功能是去掉首尾空格        keyWord = mSearchText.getText().toString().trim();        currentPage = 0;        // 第一个参数表示搜索字符串，第二个参数表示poi搜索类型，第三个参数表示poi搜索区域（空字符串代表全国）        query = new PoiSearch.Query(keyWord,"","深圳市");        query.setPageSize(20);//setting how mang itmes to return;        query.setPageNum(currentPage);//setup query the first page;        if(lp!=null){            poiSearch = new PoiSearch(this,query);            poiSearch.setOnPoiSearchListener(this);            // 设置搜索区域为以lp点为圆心，其周围5000米范围            poiSearch.setBound(new PoiSearch.SearchBound(lp,5000,true));            poiSearch.searchPOIAsyn();//asyn search        }    }    @Override    protected void onResume(){        super.onResume();        mapView.onResume();        whetherToShowDetailInfo(false);    }    @Override    protected void onPause(){        super.onPause();        mapView.onPause();    }    @Override    protected void onSaveInstanceState(Bundle outState){        super.onSaveInstanceState(outState);        mapView.onSaveInstanceState(outState);    }    @Override    protected void onDestroy(){        super.onDestroy();        mapView.onDestroy();    }    @Override    public void onPoiItemSearched(PoiItem arg0,int arg1){    }//    搜索成功时的回调    @Override    public void onPoiSearched(PoiResult result, int rcode){        if(rcode ==1000){//            检测搜索结果            if(result!=null && result.getQuery()!=null){//                是否是同一条                if(result.getQuery().equals(query)){                    poiResult = result;                    poiItems = poiResult.getPois();//                   获取poitem数据                    List<SuggestionCity> suggestionCities = poiResult.getSearchSuggestionCitys();                    if(poiItems !=null && poiItems.size()>0) {                        //清楚POI信息                        whetherToShowDetailInfo(false);//                        并还原点击marker样式                        if (mlastMarker != null) {                            resetlastmarker();                        }//                        清除之前的结果marker样式                        if (poiOverlay != null) {                            poiOverlay.removeFromMap();                        }//                        新的marker                        mAMap.clear();                        poiOverlay = new myPoiOverlay(mAMap, poiItems);                        poiOverlay.addToMap();                        poiOverlay.zoomToSpan();                        mAMap.addMarker(new MarkerOptions().anchor(0.5f, 0.5f)                                .icon(BitmapDescriptorFactory                                        .fromBitmap(BitmapFactory.decodeResource(                                                getResources(), R.drawable.point4)))                                .position(new LatLng(lp.getLatitude(), lp.getLongitude())));//在地图上显示搜索范围圈                        mAMap.addCircle(new CircleOptions().center(new LatLng(lp.getLatitude(), lp.getLongitude())).radius(5000)                                .strokeColor(Color.BLUE)                                .fillColor(Color.argb(50, 1, 1, 1))                                .strokeWidth(2));                    }else if (suggestionCities !=null && suggestionCities.size()>0){                        showSuggestCity(suggestionCities);                    } else {                        ToastUtil.show(PoiAroundSearch.this,R.string.no_result);                    }                }            }else {                ToastUtil.show(PoiAroundSearch.this,R.string.no_result);            }        }    }    public boolean onMarkerClick(Marker marker) {        if (marker.getObject() != null) {//            显示相关的位置信息            whetherToShowDetailInfo(true);            try {                PoiItem mCurrentPoi = (PoiItem) marker.getObject();                if (mlastMarker == null) {                    mlastMarker = marker;                } else {//                    还原原来的marker                    resetlastmarker();                    mlastMarker = marker;                }                detailMarker = marker;//                按下后的显示图标                detailMarker.setIcon(BitmapDescriptorFactory.fromBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.poi_marker_pressed)));                setPoiItemDisplayContent(mCurrentPoi);            } catch (Exception e) {            }        } else {            whetherToShowDetailInfo(false);            resetlastmarker();        }        return true;    }//    将之前点击的marker还原为原来的状态    private void resetlastmarker() {        int index = poiOverlay.getPoiIndex(mlastMarker);//        10个以内的marker显示图标        if(index<10){            mlastMarker.setIcon(BitmapDescriptorFactory                    .fromBitmap(BitmapFactory.decodeResource(                            getResources(),                            markers[index])));        }else{//            大于10个后的marker显示图标信息            mlastMarker.setIcon(BitmapDescriptorFactory.fromBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.marker_other_highlight)));        }        mlastMarker = null;    }    private void setPoiItemDisplayContent(final PoiItem mCurrentPoi){        mPoiName.setText(mCurrentPoi.getTitle());        mPoiAddress.setText(mCurrentPoi.getSnippet());    }    @Override    public View getInfoContents(Marker arg0){        return null;    }    @Override    public View getInfoWindow(Marker arg0){        return null;    }    @Override    public void onInfoWindowClick(Marker arg0){    }    @Override    public void onClick(View v){        switch (v.getId()) {            case R.id.btn_search:            doSearchQuery();            break;            default:                break;        }    }    private int[] markers = {            R.drawable.poi_marker_1,            R.drawable.poi_marker_2,            R.drawable.poi_marker_3,            R.drawable.poi_marker_4,            R.drawable.poi_marker_5,            R.drawable.poi_marker_6,            R.drawable.poi_marker_7,            R.drawable.poi_marker_8,            R.drawable.poi_marker_9,            R.drawable.poi_marker_10,    };    private void whetherToShowDetailInfo(boolean isToShow){        if(isToShow){            mPoiDetail.setVisibility(View.VISIBLE);        }else {            mPoiDetail.setVisibility(View.GONE);        }    }    @Override    public void onMapClick(LatLng arg0){        whetherToShowDetailInfo(false);        if(mlastMarker!=null){            resetlastmarker();        }    }    private void showSuggestCity(List<SuggestionCity> cities){        String infomation = "推荐城市\n";        for(int i = 0;i<cities.size();i++){            infomation += "城市名称：" + cities.get(i).getCityName() + "城市区号：" + cities.get(i).getCityCode() + "城市编码：" + cities.get(i).getAdCode() + "\n";        }        ToastUtil.show(this,infomation);    }//myPoiOverlay类，该类下面有多个方法    private class myPoiOverlay{        private AMap mamap;        private List<PoiItem> mPois;        private ArrayList<Marker> mPoiMarks = new ArrayList<Marker>();//    构造函数，传进来的是amap对象和查询到的结果itmes  mPois        public myPoiOverlay(AMap amap,List<PoiItem>pois){            mamap = amap;            mPois = pois;        }//增加Maker到地图中    public void addToMap(){        for(int i=0;i<mPois.size();i++){            Marker marker = mamap.addMarker(getMarkerOptions(i));            PoiItem item = mPois.get(i);            marker.setObject(item);            mPoiMarks.add(marker);        }    }//移除所有的marker    public void removeFromMap(){        for(Marker mark: mPoiMarks){            mark.remove();        }    }//移动镜头到当前的视角    public void zoomToSpan(){        if(mPois !=null && mPois.size()>0){            if(mamap ==null) return;            LatLngBounds bounds = getLatLngBounds();//            瞬间移动到目标位置            mamap.moveCamera(CameraUpdateFactory.newLatLngBounds(bounds,100));        }    }    private LatLngBounds getLatLngBounds(){        LatLngBounds.Builder b = LatLngBounds.builder();        for(int i=0;i<mPois.size();i++){            b.include(new LatLng(mPois.get(i).getLatLonPoint().getLatitude(),mPois.get(i).getLatLonPoint().getLongitude()));        }        return b.build();    }    private MarkerOptions getMarkerOptions(int index){        return new MarkerOptions()                .position(new LatLng(mPois.get(index).getLatLonPoint()                .getLatitude(),mPois.get(index)                .getLatLonPoint().getLongitude()))                .title(getTitle(index)).snippet(getSnippet(index))                .icon(getBitmapDescriptor(index));    }    protected String getTitle(int index){        return mPois.get(index).getTitle();    }    protected String getSnippet(int index){        return mPois.get(index).getSnippet();    }//获取位置，第几个index就第几个poi    public int getPoiIndex(Marker marker){        for(int i=0;i<mPoiMarks.size();i++){            if(mPoiMarks.get(i).equals(marker)){                return i;            }        }        return -1;    }    public PoiItem getPoiItem(int index) {        if (index < 0 || index >= mPois.size()) {            return null;        }        return mPois.get(index);    }    protected BitmapDescriptor getBitmapDescriptor(int arg0){        if(arg0<10){            BitmapDescriptor icon = BitmapDescriptorFactory.fromBitmap(                    BitmapFactory.decodeResource(getResources(),markers[arg0]));            return icon;        }else {            BitmapDescriptor icon = BitmapDescriptorFactory.fromBitmap(                    BitmapFactory.decodeResource(getResources(),R.drawable.marker_other_highlight));            return icon;        }    }    }}

github源码下载链接

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