首先，去官网去注册,百度地图官网:http://lbsyun.baidu.com/
拿到密钥:AppKey:http://lbsyun.baidu.com/apiconsole/key
申请密钥的步骤具体在:http://lbsyun.baidu.com/index.php?title=android-locsdk/guide/key
下载第三方Jar包和一些SO文件:http://lbsyun.baidu.com/index.php?title=android-locsdk/geosdk-android-download

详情见代码：

    private MapView mMapView = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_map_show);

        // 获取地图控件引用
        mMapView = (MapView) findViewById(R.id.id_bmapView);

        BaiduMap map = mMapView.getMap();

        // 普通地图
        map.setMapType(BaiduMap.MAP_TYPE_NORMAL);

        //卫星地图
        // map.setMapType(BaiduMap.MAP_TYPE_SATELLITE);

        //开启交通图
        map.setTrafficEnabled(true);

        //开启热力图
        // map.setBaiduHeatMapEnabled(true);
    }

    @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
        mMapView.onDestroy();
        mMapView = null;
    }

    @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();
    }

}

    @BindView(R.id.bmapView)
    MapView mMapView;
    @BindView(R.id.address)
    TextView mAddress;

    // 定位相关
    LocationClient mLocClient;
    //定位监听
    public MyLocationListener myListener = new MyLocationListener();

    BaiduMap mBaiduMap;
    boolean isFirstLoc = true; // 是否首次定位
    BDLocation mlocation;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_map_locate);
        ButterKnife.bind(this);

        mBaiduMap = mMapView.getMap();

        // 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);
        option.setAddrType("all");
        mLocClient.setLocOption(option);
        mLocClient.start();

    }

    /**
     * 定位SDK监听函数
     */
    public class MyLocationListener 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;
            }

            mlocation = location;

            MyLocationData locData = new MyLocationData.Builder()
                    .accuracy(mlocation.getRadius())
                    // 此处设置开发者获取到的方向信息，顺时针0-360
                    .direction(100).latitude(mlocation.getLatitude())
                    .longitude(mlocation.getLongitude()).build();

            mBaiduMap.setMyLocationData(locData);

            if (isFirstLoc) {
                isFirstLoc = false;
                LatLng ll = new LatLng(location.getLatitude(), location.getLongitude());
                MapStatus.Builder builder = new MapStatus.Builder();
                builder.target(ll).zoom(18.0f);
                mBaiduMap.animateMapStatus(MapStatusUpdateFactory.newMapStatus(builder.build()));
            }

            // 地址设置
            mAddress.setText("维度:" + mlocation.getLatitude() + "\n"
                    + "精度:" + mlocation.getLongitude() + "\n"
                    + "地址:" + mlocation.getAddrStr());
        }
    }

    @Override
    protected void onPause() {
        //在activity执行onPause时执行mMapView. onPause ()，实现地图生命周期管理
        mMapView.onPause();
        super.onPause();
    }

    @Override
    protected void onResume() {
        //在activity执行onResume时执行mMapView. onResume ()，实现地图生命周期管理
        mMapView.onResume();
        super.onResume();
    }

    @Override
    protected void onDestroy() {
        // 退出时销毁定位
        mLocClient.stop();

        // 关闭定位图层
        mBaiduMap.setMyLocationEnabled(false);
        mMapView.onDestroy();
        mMapView = null;
        super.onDestroy();
    }
}