按照开发者文档一步一步复制过来，发现定位成功，但是无法在地图上无法显示当前位置。

首先确保定位权限是否开启，测试设备可以到应用管理那手动开启

同时在权限清单加入以下权限

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <!-- wifi状态权限 -->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.READ_CONTACTS" />
    <uses-permission android:name="android.permission.RECEIVE_SMS" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_SMS" />
    <uses-permission android:name="android.permission.SEND_SMS" />
    <uses-permission android:name="android.permission.WRITE_SMS" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

根据官方demo                 可能是无法显示

public class MyLocationListener extends BDAbstractLocationListener {
        @Override
        public void onReceiveLocation(BDLocation location) {
            //mapView 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(location.getDirection()).latitude(location.getLatitude())
                    .longitude(location.getLongitude()).build();
            mBaiduMap.setMyLocationData(locData);
    }
}

查阅资料后要加一个判断：

 public class MyLocationListener extends BDAbstractLocationListener {
        @Override
        public void onReceiveLocation(BDLocation location) {
            //mapView 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(location.getDirection()).latitude(location.getLatitude())
                    .longitude(location.getLongitude()).build();
            // 设置定位数据, 只有先允许定位图层后设置数据才会生效
            mBaiduMap.setMyLocationData(locData);
            if (isFirstLoc) {
                isFirstLoc = false;
                LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
                MapStatus.Builder builder = new MapStatus.Builder();
                builder.target(latLng).zoom(20.0f);
                mBaiduMap.animateMapStatus(MapStatusUpdateFactory.newMapStatus(builder.build()));
            }

        }
    }

这样就可以显示了