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   源码介绍

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做的一个小系统，用于手机定位，代码比较简单适合初学者学习，有疑问的地方欢迎大家指出

package com.zky.testbdmap;

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.BitmapDescriptor;
import com.baidu.mapapi.map.BitmapDescriptorFactory;
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.MyLocationData;
import com.baidu.mapapi.map.MyLocationConfiguration.LocationMode;
import com.baidu.mapapi.model.LatLng;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;

/**
 * 功能：结合定位SDK实现定位
 * 作者：周克瑜
 * 时间：2016-01-20
 *
 */
public class MainActivity extends Activity { 
    
	    // 定位相关
		LocationClient mLocClient;
		public MyLocationListenner myListener = new MyLocationListenner();
		private LocationMode mCurrentMode;
		BitmapDescriptor mCurrentMarker;

		MapView mMapView;
		BaiduMap mBaiduMap;

		// UI相关
		OnCheckedChangeListener radioButtonListener;
		Button requestLocButton;
		boolean isFirstLoc = true;// 是否首次定位	
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		//在使用SDK各组件之前初始化context信息，传入ApplicationContext  
        //注意该方法要再setContentView方法之前实现  
        SDKInitializer.initialize(getApplicationContext());  
		
		setContentView(R.layout.activity_main);
		
		requestLocButton = (Button) findViewById(R.id.btn_Switch);
        mCurrentMode = LocationMode.NORMAL;
        requestLocButton.setText("普通");
        
        OnClickListener btnClickListener = new OnClickListener() {
            public void onClick(View v) {
                switch (mCurrentMode) {
                    case NORMAL:
                        requestLocButton.setText("跟随");
                        mCurrentMode = LocationMode.FOLLOWING;
                        mBaiduMap
                                .setMyLocationConfigeration(new MyLocationConfiguration(
                                        mCurrentMode, true, mCurrentMarker));
                        break;
                    case COMPASS:
                        requestLocButton.setText("普通");
                        mCurrentMode = LocationMode.NORMAL;
                        mBaiduMap
                                .setMyLocationConfigeration(new MyLocationConfiguration(
                                        mCurrentMode, true, mCurrentMarker));
                        break;
                    case FOLLOWING:
                        requestLocButton.setText("罗盘");
                        mCurrentMode = LocationMode.COMPASS;
                        mBaiduMap
                                .setMyLocationConfigeration(new MyLocationConfiguration(
                                        mCurrentMode, true, mCurrentMarker));
                        break;
                    default:
                        break;
                }
            }
        };
        
        requestLocButton.setOnClickListener(btnClickListener);

        /**
		RadioGroup group = (RadioGroup) this.findViewById(R.id.radioGroup);
		// 设置图标
		radioButtonListener = new OnCheckedChangeListener() {
			@Override
			public void onCheckedChanged(RadioGroup group, int checkedId) {
				if (checkedId == R.id.defaulticon) {
					// 传入null则，恢复默认图标
					mCurrentMarker = null;
					mBaiduMap
							.setMyLocationConfigeration(new MyLocationConfiguration(
									mCurrentMode, true, null));
				}
				if (checkedId == R.id.customicon) {
					// 修改为自定义marker
					mCurrentMarker = BitmapDescriptorFactory
							.fromResource(R.drawable.icon_geo);
					mBaiduMap
							.setMyLocationConfigeration(new MyLocationConfiguration(
									mCurrentMode, true, mCurrentMarker));
				}
			}
		};
		
		group.setOnCheckedChangeListener(radioButtonListener);*/
        
		// 地图初始化
		mMapView = (MapView) findViewById(R.id.bmapView);
		mBaiduMap = mMapView.getMap();
		
		// 普通地图    
        mBaiduMap.setMapType(BaiduMap.MAP_TYPE_NORMAL);    
        // 卫星地图    
        mBaiduMap.setMapType(BaiduMap.MAP_TYPE_SATELLITE);
        // 开启交通图     
        // mBaiduMap.setTrafficEnabled(true);  
        // 开启热力图     
        // mBaiduMap.setBaiduHeatMapEnabled(true); 
        // 显示默认的缩放控件 
        mMapView.showZoomControls(true);
        // 显示默认比例尺控件           
        mMapView.showScaleControl(true);
		
		// 开启定位图层
		mBaiduMap.setMyLocationEnabled(true);
		// 定位初始化
		mLocClient = new LocationClient(this);
		mLocClient.registerLocationListener(myListener);
		LocationClientOption option = new LocationClientOption();
		option.setOpenGps(true);// 打开gps
		option.setCoorType("bd09ll"); // 设置坐标类型
		
	    option.setScanSpan(1000);
		mLocClient.setLocOption(option);
		mLocClient.start();
  
	}
	
	
	/**
	 * 定位SDK监听函数
	 */
	public class MyLocationListenner implements BDLocationListener {

        @Override
        public void onReceiveLocation(BDLocation location) {
            // map view 销毁后不在处理新接收的位置
            if (location == null || mMapView == null) {
                return;
            }
            MyLocationData locData = new MyLocationData.Builder()
                    .accuracy(location.getRadius())
                            // 此处设置开发者获取到的方向信息，顺时针0-360
                    .direction(100).latitude(location.getLatitude())
                    .longitude(location.getLongitude()).build();
            mBaiduMap.setMyLocationData(locData);
            		
            if (isFirstLoc) {
                isFirstLoc = false;
                LatLng ll = new LatLng(location.getLatitude(),
                        location.getLongitude());
                // 在定位时指定比例尺大小,设置到50米的大小
                float f = mBaiduMap.getMaxZoomLevel();//19.0
        		// float m = mBaiduMap.getMinZoomLevel();//3.0
        		MapStatusUpdate u = MapStatusUpdateFactory.newLatLngZoom(ll, f-2);
                //MapStatusUpdate u = MapStatusUpdateFactory.newLatLng(ll);
                mBaiduMap.animateMapStatus(u);
            }
        }

		public void onReceivePoi(BDLocation poiLocation) {
		}
	}

	
	@Override  
    protected void onDestroy() {  
        super.onDestroy();  
        //在activity执行onDestroy时执行mMapView.onDestroy()，实现地图生命周期管理  
        // 关闭定位图层
 		mBaiduMap.setMyLocationEnabled(false);
 		mMapView.onDestroy();
 		mMapView = null;        
      
        //mMapView.onDestroy();  
    }  
	
    @Override  
    protected void onResume() {  
        super.onResume();  
        //在activity执行onResume时执行mMapView. onResume ()，实现地图生命周期管理  
        mMapView.onResume();  
        }  
    
    @Override  
    protected void onPause() {  
        super.onPause();  
        //在activity执行onPause时执行mMapView. onPause ()，实现地图生命周期管理 
     
        mMapView.onPause();  
        }  
	
}