Android 开发百度地图之四 Poi

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本文主要就百度地图上的POI 功能做个讲解，本次主要是以上海市内搜索相关地区的例子。
首先是在前面百度开发系列的demo 中添加两个搜索框来搜索起始地址。代码如下：

<LinearLayout          android:layout_width="match_parent"          android:layout_height="wrap_content"          android:gravity="center"          android:orientation="horizontal">          <ImageView              android:layout_width="30dp"              android:layout_height="30dp"              android:src="@drawable/ic_baidumap_start"/>          <TextView              android:id="@+id/tv_start_pos"              android:layout_width="match_parent"              android:layout_height="match_parent"              android:gravity="center_vertical"              android:paddingLeft="10dp"              android:text="起点"/>      </LinearLayout>      <LinearLayout          android:layout_width="match_parent"          android:layout_height="wrap_content"          android:gravity="center"          android:orientation="horizontal">          <ImageView              android:layout_width="30dp"              android:layout_height="30dp"              android:src="@drawable/ic_baidumap_destination"/>          <TextView              android:id="@+id/tv_end_pos"              android:layout_width="match_parent"              android:layout_height="match_parent"              android:gravity="center_vertical"              android:paddingLeft="10dp"              android:text="終点"/>      </LinearLayout>

在java主文文件中添加触发监听，当点击搜索框是从下面蹦出一个Dialog 来搜索。

 @Override    public void onClick(View view) {         switch (view.getId()){             case R.id.tv_start_pos: {                 ChoosePosDlg.DlgListener listener = new ChoosePosDlg.DlgListener() {                     @Override                     public void choosePossuccess(MapPosition mapPosition) {                         mStartPosition=mapPosition;                         mTxtStartPos.setText(mapPosition.getName());                     }                 };                 ChoosePosDlg.registerListener(listener);                 new ChoosePosDlg(this, R.style.bottom_animation_dlg,mCity).show();             }             break;             case R.id.tv_end_pos: {                 ChoosePosDlg.DlgListener listener = new ChoosePosDlg.DlgListener() {                     @Override                     public void choosePossuccess(MapPosition mapPosition) {                         mEndPosition=mapPosition;                         mTxtEndPos.setText(mapPosition.getName());                     }                 };                 ChoosePosDlg.registerListener(listener);                 new ChoosePosDlg(this, R.style.bottom_animation_dlg,mCity).show();             }         }    }

最后在编写 Dialog，其中主要的poi 代码块是：

    mPoiSearch.searchInCity((new PoiCitySearchOption())                                    .city(mCity)                                    .keyword(addr.trim())                                    .pageNum(0).pageCapacity(15));   //调用poi查询

监听查询的结果：

 @Override    public void onGetPoiResult(PoiResult poiResult) {        if (poiResult.error == SearchResult.ERRORNO.NO_ERROR) {            if (TextUtils.isEmpty(mAddrEditText.getText().toString().trim())) {                return;            }            mMapPositionList.clear();            for (int i = 0; i < poiResult.getAllPoi().size(); i++) {                try {                    MapPosition mp = new MapPosition();                    if (poiResult.getAllPoi().get(i).type == PoiInfo.POITYPE.BUS_STATION) {                        mp.setAddress(poiResult.getAllPoi().get(i).city + "(" +                                poiResult.getAllPoi().get(i).name + "公交车站)");                    } else {                        mp.setAddress(poiResult.getAllPoi().get(i).address);                    }                    mp.setName(poiResult.getAllPoi().get(i).name);                    mp.setLatitude(poiResult.getAllPoi().get(i).location.latitude + "");                    mp.setLongitude(poiResult.getAllPoi().get(i).location.longitude + "");                    mMapPositionList.add(mp);                } catch (Exception e) {                    e.printStackTrace();                    continue;                }            }            mRootListAdapter.notifyDataSetChanged();        } else {            mMapPosition.clearPos();        }    }

完整的ChoosePosDlg 的代码如下：

public class ChoosePosDlg extends Dialog implements OnGetPoiSearchResultListener {    private final Context mContext;    private PoiSearch mPoiSearch;    private String mCity;    private EditText mAddrEditText;    private ListView mListView;    private MapPosition mMapPosition;    private ArrayList<MapPosition> mMapPositionList;    private ChoosePosAdapter mRootListAdapter;    public ChoosePosDlg(Context context, int themeResId,String city) {        super(context, themeResId);        mContext=context;        mCity = city;    }    private static DlgListener mListener;    public static interface DlgListener {        public void choosePossuccess(MapPosition mapPosition);    }    public static void registerListener(DlgListener listener) {        mListener = listener;    }    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.dialog_choose_pos);        setCancelable(true);        mPoiSearch = PoiSearch.newInstance();        mPoiSearch.setOnGetPoiSearchResultListener(this);        initView();        setViews();        setListeners();        mAddrEditText.requestFocus();    }    @Override    public void setContentView(int layoutResID) {        super.setContentView(layoutResID);        initListener();            DisplayMetrics dm = new DisplayMetrics();            ((Activity) mContext).getWindowManager().getDefaultDisplay().getMetrics(dm);            int screenHeight = dm.heightPixels;            Window window = this.getWindow();            WindowManager.LayoutParams params = window.getAttributes();            params.x = 0;//设置x坐标            params.y = (screenHeight) / 2;//设置y坐标            window.setAttributes(params);    }    private void initListener() {        setOnKeyListener(new DialogInterface.OnKeyListener() {            @Override            public boolean onKey(DialogInterface arg0, int keyCode, KeyEvent arg2) {                // TODO Auto-generated method stub                if (keyCode == KeyEvent.KEYCODE_BACK) {                    dismiss();                    return true;                }                return false;            }        });        setOnDismissListener(new OnDismissListener() {            @Override            public void onDismiss(DialogInterface dialogInterface) {                mPoiSearch.destroy();            }        });    }    protected void initView() {        mAddrEditText = (EditText) findViewById(R.id.et_addr);        mListView = (ListView) findViewById(R.id.lv_result);    }    protected void setViews() {        mAddrEditText.setHint("输入地址");        mMapPosition = new MapPosition();        mMapPositionList = new ArrayList<MapPosition>();       // mMapPositionList.addAll(defaultPositionList);        mRootListAdapter = new ChoosePosAdapter(mContext, mMapPositionList);        mListView.setAdapter(mRootListAdapter);    }    /////////////////////////////////////setListeners////////////////////////////////////////    private void setListeners() {        mAddrEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() {            @Override            public void onFocusChange(View view, boolean b) {                if (b) {                    String addr = mAddrEditText.getText().toString().trim();                    if (!TextUtils.isEmpty(addr)) {                        if (!TextUtils.isEmpty(mCity)) {                            mPoiSearch.searchInCity((new PoiCitySearchOption())                                    .city(mCity)                                    .keyword(addr.trim())                                    .pageNum(0).pageCapacity(15));                        }                    }                }            }        });        //////////////////////////////////////////////////////////////////////////////////        mAddrEditText.addTextChangedListener(new TextWatcher() {            @Override            public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {            }            @Override            public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {            }            @Override            public void afterTextChanged(Editable editable) {                String addr = mAddrEditText.getText().toString().trim();                if (!TextUtils.isEmpty(addr)) {                    if (!TextUtils.isEmpty(mCity)) {                        mPoiSearch.searchInCity((new PoiCitySearchOption())                                .city(mCity)                                .keyword(addr.trim())                                .pageNum(0).pageCapacity(15));                    }                }                ////            }        });        //////////////////////////////////////////////////////////////////////////////////        mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {                if (null == mListener) {                    dismiss();                    return;                }                    mMapPosition = mMapPositionList.get(i);                    if (TextUtils.isEmpty(mMapPosition.getName())) {                        Toast.makeText(mContext, "请输入正确的位置", Toast.LENGTH_SHORT).show();                    } else {                        if (null != mListener)                            mListener.choosePossuccess(mMapPosition);                        dismiss();                    }            }        });    }   //////////////////////////poi/////////////////////////////////////////    @Override    public void onGetPoiResult(PoiResult poiResult) {        if (poiResult.error == SearchResult.ERRORNO.NO_ERROR) {            if (TextUtils.isEmpty(mAddrEditText.getText().toString().trim())) {                return;            }            mMapPositionList.clear();            for (int i = 0; i < poiResult.getAllPoi().size(); i++) {                try {                    MapPosition mp = new MapPosition();                    if (poiResult.getAllPoi().get(i).type == PoiInfo.POITYPE.BUS_STATION) {                        mp.setAddress(poiResult.getAllPoi().get(i).city + "(" +                                poiResult.getAllPoi().get(i).name + "公交车站)");                    } else {                        mp.setAddress(poiResult.getAllPoi().get(i).address);                    }                    mp.setName(poiResult.getAllPoi().get(i).name);                    mp.setLatitude(poiResult.getAllPoi().get(i).location.latitude + "");                    mp.setLongitude(poiResult.getAllPoi().get(i).location.longitude + "");                    mMapPositionList.add(mp);                } catch (Exception e) {                    e.printStackTrace();                    continue;                }            }            mRootListAdapter.notifyDataSetChanged();        } else {            mMapPosition.clearPos();        }    }    @Override    public void onGetPoiDetailResult(PoiDetailResult poiDetailResult) {    }    //////////////////////////poi/////////////////////////////////////////}

效果如下：
这里写图片描述

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