[移动开发]AS 百度地图定位

1.首先是在百度地图开发网站寻找Android地图SDK开发文档，进去根据教程注册和获取密钥。

?2.随后在manifest里面添加一些权限。

<!-- 访问网络，进行地图相关业务数据请求，包括地图数据，路线规划，POI检索等 -->
<uses-permission android:name="android.permission.INTERNET" />
<!-- 获取网络状态，根据网络状态切换进行数据请求网络转换 -->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

<!-- 读取外置存储。如果开发者使用了so动态加载功能并且把so文件放在了外置存储区域，则需要申请该权限，否则不需要 -->
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<!-- 写外置存储。如果开发者使用了离线地图，并且数据写在外置存储区域，则需要申请该权限 -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

<!-- 这个权限用于进行网络定位 -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<!-- 这个权限用于访问GPS定位 -->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

<service android:name="com.baidu.location.f"
    android:enabled="true"
    android:process=":remote"/>

<meta-data
    android:name="com.baidu.lbsapi.API_KEY"
    android:value="自己的key" />

3.main代码如下

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

        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
        } else {
            requestLocation();
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode) {
            case 1:
                if (grantResults[0] != PackageManager.PERMISSION_GRANTED) {
                    Toast.makeText(this, "Without Location Permissions!", Toast.LENGTH_SHORT).show();
                    finish();
                } else {
                    Toast.makeText(this, "Got Location Permissions!", Toast.LENGTH_SHORT).show();
                    requestLocation();
                }
                break;
        }
    }

    private void requestLocation() {
        MyLocationListener myLocationListener = new MyLocationListener();
        mLocationClient = new LocationClient(getApplicationContext());
        mLocationClient.registerLocationListener(myLocationListener);
        SDKInitializer.initialize(getApplicationContext());
        setContentView(R.layout.activity_main);

        mapView = findViewById(R.id.bmapView);
        baiduMap = mapView.getMap();
        baiduMap.setMyLocationEnabled(true);


        LocationClientOption option = new LocationClientOption();
        option.setScanSpan(1000);//每一秒发送一次
        option.setLocationMode(LocationClientOption.LocationMode.Hight_Accuracy);
        option.setIsNeedAddress(true);
        mLocationClient.setLocOption(option);
        mLocationClient.start();//启动位置请求
    }


    private class MyLocationListener extends BDAbstractLocationListener {
        @Override
        public void onReceiveLocation(BDLocation bdLocation) {
            StringBuffer currentPosition = new StringBuffer();
            currentPosition.append("Longitude: ").append(bdLocation.getLongitude()).append("\n");
            currentPosition.append("Latitude: ").append(bdLocation.getLatitude());
            String s = "" + bdLocation.getLatitude();


            if (bdLocation.getLocType() == BDLocation.TypeGpsLocation || bdLocation.getLocType() == BDLocation.TypeNetWorkLocation) {
                setMyLocation(bdLocation);
            }

        }
    }

    private void setMyLocation(BDLocation bdLocation) {
        if (isFirstLocation) {
            LatLng latLng = new LatLng(bdLocation.getLatitude(), bdLocation.getLongitude());
            MapStatusUpdate update = MapStatusUpdateFactory.newLatLng(latLng);
            MyLocationData locationData = new MyLocationData.Builder().latitude(latLng.latitude).longitude(latLng.longitude).build();
            baiduMap.animateMapStatus(update);
            baiduMap.setMyLocationData(locationData);       // 地图上显示定位点
            isFirstLocation = false;
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        mapView.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
        mapView.onPause();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mLocationClient.stop();
        mapView.onDestroy();
    }
}

4.结果如图

?

代码仓库：https://gitee.com/flowers-like-brocade/projects