添加定位功能

• MainActivity

package com.sjy.baidumap;

import com.baidu.location.BDLocation;
import com.baidu.location.BDLocationListener;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;
import com.baidu.mapapi.SDKInitializer;
import com.baidu.mapapi.map.BaiduMap;
import com.baidu.mapapi.map.MapStatusUpdate;
import com.baidu.mapapi.map.MapStatusUpdateFactory;
import com.baidu.mapapi.map.MapView;
import com.baidu.mapapi.map.MyLocationConfiguration;
import com.baidu.mapapi.map.MyLocationConfiguration.LocationMode;
import com.baidu.mapapi.model.LatLng;
import com.baidu.mapapi.map.MyLocationData;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Window;
import android.widget.Toast;

public class MainActivity extends Activity {
    private MapView mMapView = null;// 一個顯示地圖的視圖（View）
    private BaiduMap mBaiduMap;
    private Context context;

    // 定位相關(guān)
    private LocationClient mLocationClient;
    private MyLocationListener mLocationListener;
    private boolean isFirstIn = true;
    private double mLatitude;// 緯度
    private double mLongtitude;// 經(jīng)度

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        // 在使用SDK各組件之前初始化context信息，傳入ApplicationContext
        // 注意該方法要再setContentView方法之前實現(xiàn)
        SDKInitializer.initialize(getApplicationContext());
        setContentView(R.layout.activity_main);
        this.context = this;
        initView();
        initLocation();
    }

    private void initLocation() {
        mLocationClient = new LocationClient(this);
        mLocationListener = new MyLocationListener();
        mLocationClient.registerLocationListener(mLocationListener);
        LocationClientOption option = new LocationClientOption();
        option.setCoorType("bd09ll");
        option.setIsNeedAddress(true);
        option.setOpenGps(true);
        option.setScanSpan(1000);

        mLocationClient.setLocOption(option);
    }

    private void initView() {
        mMapView = (MapView) findViewById(R.id.bmapView);
        mBaiduMap = mMapView.getMap();// 獲取地圖控制器
        MapStatusUpdate mapStatusUpdate = MapStatusUpdateFactory.zoomTo(15.0f);// 設(shè)置地圖縮放級別
    }

    @Override
    protected void onStart() {
        // TODO Auto-generated method stub
        super.onStart();
        // 開始定位
        mBaiduMap.setMyLocationEnabled(true);
        if (!mLocationClient.isStarted())
            mLocationClient.start();
    }

    @Override
    protected void onStop() {
        // TODO Auto-generated method stub
        super.onStop();
        // 停止定位
        mBaiduMap.setMyLocationEnabled(false);
        mLocationClient.stop();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        // 在activity執(zhí)行onDestroy時執(zhí)行mMapView.onDestroy()，實現(xiàn)地圖生命周期管理
        mMapView.onDestroy();
    }

    @Override
    protected void onResume() {
        super.onResume();
        // 在activity執(zhí)行onResume時執(zhí)行mMapView. onResume ()，實現(xiàn)地圖生命周期管理
        mMapView.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
        // 在activity執(zhí)行onPause時執(zhí)行mMapView. onPause ()，實現(xiàn)地圖生命周期管理
        mMapView.onPause();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // TODO Auto-generated method stub
        getMenuInflater().inflate(R.menu.main, menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        switch (item.getItemId()) {
        case R.id.id_map_commen:
            mBaiduMap.setMapType(BaiduMap.MAP_TYPE_NORMAL);
            break;
        case R.id.id_map_site:
            mBaiduMap.setMapType(BaiduMap.MAP_TYPE_SATELLITE);
            break;
        case R.id.id_map_traffic:
            if (mBaiduMap.isTrafficEnabled()) {
                mBaiduMap.setTrafficEnabled(false);
                item.setTitle("實時交通(off)");
            } else {
                mBaiduMap.setTrafficEnabled(true);
                item.setTitle("實時交通(on)");
            }
            break;
        case R.id.id_map_location:
            centerToMyLocation();

            break;

        }
        return super.onOptionsItemSelected(item);
    }

    // 定位到我的位置
    private void centerToMyLocation() {
        LatLng latLng = new LatLng(mLatitude, mLongtitude);// 地理坐標基本數(shù)據(jù)結(jié)構(gòu)
        MapStatusUpdate msu // 描述地圖狀態(tài)將要發(fā)生的變化
                = MapStatusUpdateFactory.newLatLng(latLng);// 設(shè)置地圖新中心點
        mBaiduMap.animateMapStatus(msu);// 以動畫方式更新地圖狀態(tài)，動畫耗時 300 ms
    }

    private class MyLocationListener implements BDLocationListener {

        @Override
        public void onReceiveLocation(BDLocation location) {
            MyLocationData data = new MyLocationData.Builder()// 定位數(shù)據(jù)
                    .accuracy(location.getRadius())// 設(shè)置定位數(shù)據(jù)的精度信息，單位：米
                    .latitude(location.getLatitude())// 設(shè)置定位數(shù)據(jù)的緯度
                    .longitude(location.getLongitude())// 設(shè)置定位數(shù)據(jù)的經(jīng)度
                    .build();// 構(gòu)建生成定位數(shù)據(jù)對象
            mBaiduMap.setMyLocationData(data);// 設(shè)置定位數(shù)據(jù), 只有先允許定位圖層后設(shè)置數(shù)據(jù)才會生效
            mLatitude = location.getLatitude();
            mLongtitude = location.getLongitude();
            // MyLocationConfiguration config = new
            // MyLocationConfiguration(LocationMode.NORMAL, ar, arg2)
            if (isFirstIn) {
                // LatLng latLng = new LatLng(location.getLatitude(),
                // location.getLongitude());
                // MapStatusUpdate msu =
                // MapStatusUpdateFactory.newLatLng(latLng);
                // mBaiduMap.animateMapStatus(msu);
                centerToMyLocation();
                isFirstIn = false;
                Toast.makeText(context, location.getAddrStr(), Toast.LENGTH_SHORT).show();
            }

        }

    }
}