android 百度地图 在线建议查询,百度地图SDK-----百度地图在线建议查询，结合AutoCompleteTextView实现搜索下拉列表。...
實現效果圖 如下
這是百度地圖 POISearch的效果，
????????????????????
這是自己寫的效果
首先實現這個功能主要用到了兩個部分
第一個部分 AutoCompleteTextView
具體使用參考 http://blog.csdn.net/iamkila/article/details/7230160
第二個部分 百度地圖的在線搜索建議功能。
http://developer.baidu.com/map/index.php?title=androidsdk/guide/retrieval
實現這個功能主要過程 可以分成幾步
1.sugAdapter = new ArrayAdapter(this,android.R.layout.simple_dropdown_item_1line);
給AutoCompleteTextView創建一個adapter
(注意：這里創建Adapter時沒有提供 字符串數據源， 而是動態的添加的)
2.keyWorldsView.setAdapter(sugAdapter);
3.AutoCompleteTextView?? 添加? onTextChangedListener 監聽器
復寫 三個方法
afterTextChanged
beforeTextChanged
onTextChanged(){
在該方法內部 調用 百度sdk提供的搜索建議方法
/**
* 使用建議搜索服務獲取建議列表，結果在onGetSuggestionResult()中更新
*/
mSuggestionSearch
.requestSuggestion((new SuggestionSearchOption())
.keyword(cs.toString()).city(city));
}
4.復寫 onGetSuggestionResult() 方法? 復寫改方法有兩種方式
(1)OnGetSuggestionResultListener listener = new OnGetSuggestionResultListener() {
public void onGetSuggestionResult(SuggestionResult res) {
if (res == null || res.getAllSuggestions() == null) {
return;
//未找到相關結果
}
//獲取在線建議檢索結果
}
};
自己創建一個監聽器，復寫方法。
讓mSuggestionSearch 添加監聽
mSuggestionSearch.setOnGetSuggestionResultListener(listener);
(2) 讓 Activity 實現 接口?? implements? OnGetSuggestionResultListener
在Activity中 復寫onGetSuggestionResult 方法
public void onGetSuggestionResult(SuggestionResult res) {
if (res == null || res.getAllSuggestions() == null) {
return;
//未找到相關結果
}
//獲取在線建議檢索結果
}
};
5.
第 3 步中的? mSuggestionSearch
.requestSuggestion((new SuggestionSearchOption())
.keyword(cs.toString()).city(city));
方法調用之后就會回調
第 4 步中的?? onGetSuggestionResult 方法。 所以要在 onGetSuggestionResult 方法中給adapter提供字符串數據源
sugAdapter.clear();
每次提供數據源的時候 都要清除上一次搜索的結果
循環讀取結果 并且添加到 adapter中
for (SuggestionResult.SuggestionInfo info : res.getAllSuggestions()) {
if (info.key != null)
sugAdapter.add(info.key);
}
sugAdapter.notifyDataSetChanged();提醒數據發生改變，這時 AutoCompleteTextView就會使用Adapter提供的
字符串數據源
然后給出?這幾個步驟對應的?截圖。
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最后給出官方BaiduMapsApiDemo?中的????? POISearch.java?中的代碼
可以自己對照著比較
package baidumapsdk.demo;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.EditText;
import android.widget.Toast;
import com.baidu.mapapi.map.BaiduMap;
import com.baidu.mapapi.map.SupportMapFragment;
import com.baidu.mapapi.overlayutil.PoiOverlay;
import com.baidu.mapapi.search.core.CityInfo;
import com.baidu.mapapi.search.core.PoiInfo;
import com.baidu.mapapi.search.core.SearchResult;
import com.baidu.mapapi.search.poi.OnGetPoiSearchResultListener;
import com.baidu.mapapi.search.poi.PoiCitySearchOption;
import com.baidu.mapapi.search.poi.PoiDetailResult;
import com.baidu.mapapi.search.poi.PoiDetailSearchOption;
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;
/**
* 演示poi搜索功能
*/
public class PoiSearchDemo extends FragmentActivity implements
OnGetPoiSearchResultListener, OnGetSuggestionResultListener {
private PoiSearch mPoiSearch = null;
private SuggestionSearch mSuggestionSearch = null;
private BaiduMap mBaiduMap = null;
/**
* 搜索關鍵字輸入窗口
*/
private AutoCompleteTextView keyWorldsView = null;
private ArrayAdapter sugAdapter = null;
private int load_Index = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_poisearch);
// 初始化搜索模塊，注冊搜索事件監聽
mPoiSearch = PoiSearch.newInstance();
mPoiSearch.setOnGetPoiSearchResultListener(this);
mSuggestionSearch = SuggestionSearch.newInstance();
mSuggestionSearch.setOnGetSuggestionResultListener(this);
keyWorldsView = (AutoCompleteTextView) findViewById(R.id.searchkey);
sugAdapter = new ArrayAdapter(this,
android.R.layout.simple_dropdown_item_1line);
keyWorldsView.setAdapter(sugAdapter);
mBaiduMap = ((SupportMapFragment) (getSupportFragmentManager()
.findFragmentById(R.id.map))).getBaiduMap();
/**
* 當輸入關鍵字變化時，動態更新建議列表
*/
keyWorldsView.addTextChangedListener(new TextWatcher() {
@Override
public void afterTextChanged(Editable arg0) {
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1,
int arg2, int arg3) {
}
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2,
int arg3) {
if (cs.length() <= 0) {
return;
}
String city = ((EditText) findViewById(R.id.city)).getText()
.toString();
/**
* 使用建議搜索服務獲取建議列表，結果在onSuggestionResult()中更新
*/
mSuggestionSearch
.requestSuggestion((new SuggestionSearchOption())
.keyword(cs.toString()).city(city));
}
});
}
@Override
protected void onPause() {
super.onPause();
}
@Override
protected void onResume() {
super.onResume();
}
@Override
protected void onDestroy() {
mPoiSearch.destroy();
mSuggestionSearch.destroy();
super.onDestroy();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
}
/**
* 影響搜索按鈕點擊事件
*
* @param v
*/
public void searchButtonProcess(View v) {
EditText editCity = (EditText) findViewById(R.id.city);
EditText editSearchKey = (EditText) findViewById(R.id.searchkey);
mPoiSearch.searchInCity((new PoiCitySearchOption())
.city(editCity.getText().toString())
.keyword(editSearchKey.getText().toString())
.pageNum(load_Index));
}
public void goToNextPage(View v) {
load_Index++;
searchButtonProcess(null);
}
public void onGetPoiResult(PoiResult result) {
if (result == null
|| result.error == SearchResult.ERRORNO.RESULT_NOT_FOUND) {
Toast.makeText(PoiSearchDemo.this, "未找到結果", Toast.LENGTH_LONG)
.show();
return;
}
if (result.error == SearchResult.ERRORNO.NO_ERROR) {
mBaiduMap.clear();
PoiOverlay overlay = new MyPoiOverlay(mBaiduMap);
mBaiduMap.setOnMarkerClickListener(overlay);
overlay.setData(result);
overlay.addToMap();
overlay.zoomToSpan();
return;
}
if (result.error == SearchResult.ERRORNO.AMBIGUOUS_KEYWORD) {
// 當輸入關鍵字在本市沒有找到，但在其他城市找到時，返回包含該關鍵字信息的城市列表
String strInfo = "在";
for (CityInfo cityInfo : result.getSuggestCityList()) {
strInfo += cityInfo.city;
strInfo += ",";
}
strInfo += "找到結果";
Toast.makeText(PoiSearchDemo.this, strInfo, Toast.LENGTH_LONG)
.show();
}
}
public void onGetPoiDetailResult(PoiDetailResult result) {
if (result.error != SearchResult.ERRORNO.NO_ERROR) {
Toast.makeText(PoiSearchDemo.this, "抱歉，未找到結果", Toast.LENGTH_SHORT)
.show();
} else {
Toast.makeText(PoiSearchDemo.this, result.getName() + ": " + result.getAddress(), Toast.LENGTH_SHORT)
.show();
}
}
@Override
public void onGetSuggestionResult(SuggestionResult res) {
if (res == null || res.getAllSuggestions() == null) {
return;
}
sugAdapter.clear();
for (SuggestionResult.SuggestionInfo info : res.getAllSuggestions()) {
if (info.key != null)
sugAdapter.add(info.key);
}
sugAdapter.notifyDataSetChanged();
}
private class MyPoiOverlay extends PoiOverlay {
public MyPoiOverlay(BaiduMap baiduMap) {
super(baiduMap);
}
@Override
public boolean onPoiClick(int index) {
super.onPoiClick(index);
PoiInfo poi = getPoiResult().getAllPoi().get(index);
// if (poi.hasCaterDetails) {
mPoiSearch.searchPoiDetail((new PoiDetailSearchOption())
.poiUid(poi.uid));
// }
return true;
}
}
}
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