前两天学习了一下Android的特色--LBS(基于百度地图Android SDK)。有些坑还是得填下,避免以后用到时忘记了。

一 .申请API_KEY

1)http://lbsyun.baidu.com/ :在这里注册并申请。注册之后出现应用列表

2)选择创建应用:下图所示

PS：SHA1找了我好久

按照书上面的，资料上看了，左侧选择项目目录类型project，打开右侧Gradle–>app–>android–>signingReport，发现，诶，怎么没有。。。。（黑人问号脸？？），突然发现左下角有个转换的键（左下标红的地方），一按。。。，答案出来了。

3)完成
创建完成，获得API_KEY。

二 .下载百度定位SDK

下载解压后得到libs文件夹

BaiduLBS_android.jar放在project目录下的app–>libs目录下，其他目录放在app–>main–>新建文件夹比如：jniLibs下

三 .使用百度地图

1） AndroidManifest.xml
添加如下权限

<!-- 这个权限用于进行网络定位-->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>
<!-- 这个权限用于访问GPS定位-->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
<!-- 用于访问wifi网络信息，wifi信息会用于进行网络定位-->
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
<!-- 获取运营商信息，用于支持提供运营商信息相关的接口-->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
<!-- 这个权限用于获取wifi的获取权限，wifi信息会用来进行网络定位-->
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
<!-- 用于读取手机当前的状态-->
<uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
<!-- 写入扩展存储，向扩展卡写入数据，用于写入离线定位数据-->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
<!-- 访问网络，网络定位需要上网-->
<uses-permission android:name="android.permission.INTERNET" />
<!-- SD卡读取权限，用户写入离线定位数据-->
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"></uses-permission>

在Application标签中声明SERVICE组件,每个APP拥有自己单独的定位SERVICE

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

Android定位SDK4.2及之后版本需要在Mainfest.xml正确设置Accesskey（AK），如果设置错误将会导致定位和地理围栏服务无法正常使用。设置AK，在Application标签中加入

<meta-data
            android:name="com.baidu.lbsapi.API_KEY"
            android:value="AK" />       //key:开发者申请的Key

2） 新建activity：LBSwithBaidu，LBSwithBaidu代码如下：

public class LBSwithBaidu extends AppCompatActivity {
    private TextView text;
    private LocationClient client;
    private  StringBuilder connrentPosition;
    private MapView map;
    private BaiduMap baidumap;
    private boolean ismylocation=true;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        SDKInitializer.initialize(getApplicationContext());
        client = new LocationClient(getApplicationContext());
        client.registerLocationListener(new MylocationListener());
        setContentView(R.layout.activity_lbswith_baidu);
        text= (TextView) findViewById(R.id.textView_location);
        map= (MapView) findViewById(R.id.mapwithbaidu);
        baidumap=map.getMap();
        baidumap.setMyLocationEnabled(true);

        List<String> permission = new ArrayList<>();
        if (ContextCompat.checkSelfPermission(LBSwithBaidu.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            permission.add(Manifest.permission.ACCESS_FINE_LOCATION);
        }
        if (ContextCompat.checkSelfPermission(LBSwithBaidu.this, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
            permission.add(Manifest.permission.READ_PHONE_STATE);
        }
        if (ContextCompat.checkSelfPermission(LBSwithBaidu.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
            permission.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
        }
        if (!permission.isEmpty()) {
            String[] permissions = permission.toArray(new String[permission.size()]);
            ActivityCompat.requestPermissions(LBSwithBaidu.this, permissions, 1);

        } else {
            requestion();
        }

    }

    private void requestion() {
        initlocation();
        client.start();
    }

    private void initlocation() {
        LocationClientOption option=new LocationClientOption();
        option.setIsNeedAddress(true);
        option.setScanSpan(5000);
        client.setLocOption(option);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode) {
            case 1:
                if (grantResults.length > 0) {
                    for(int result:grantResults){
                        if(result!=PackageManager.PERMISSION_GRANTED){
                            Toast.makeText(this, "必须同意权限", Toast.LENGTH_SHORT).show();
                            finish();
                            return;
                        }
                    }
                    requestion();
                }else {
                    Toast.makeText(this, "发生错误", Toast.LENGTH_SHORT).show();
                }
                break;
            default:
        }
    }
    public void nagativato(BDLocation bdLocation) {
        if (ismylocation) {
            LatLng ll = new LatLng(bdLocation.getLatitude(), bdLocation.getLongitude());
            Log.d("pipa",bdLocation.getLatitude()+"::"+ bdLocation.getLongitude());
            MapStatusUpdate updata = MapStatusUpdateFactory.newLatLng(ll);
            baidumap.animateMapStatus(updata);
            updata = MapStatusUpdateFactory.zoomTo(16f);
            baidumap.animateMapStatus(updata);
            ismylocation = false;

        }
        MyLocationData.Builder loBuilder=new MyLocationData.Builder().latitude(bdLocation.getLatitude())
                .longitude(bdLocation.getLongitude());
        MyLocationData locationData=loBuilder.build();
        baidumap.setMyLocationData(locationData);

    }
    public class MylocationListener implements BDLocationListener {


        @Override
        public void onReceiveLocation(BDLocation bdLocation) {
                                             if(bdLocation.getLocType()==BDLocation.TypeGpsLocation||bdLocation.getLocType()==BDLocation.TypeNetWorkLocation){
                nagativato(bdLocation);
            }

            connrentPosition = new StringBuilder();
            connrentPosition.append("纬度:").append(bdLocation.getLatitude()).append("\n");
            connrentPosition.append("经度:").append(bdLocation.getLongitude()).append("\n");
            connrentPosition.append("国家:").append(bdLocation.getCountry()).append("\n");
            connrentPosition.append("省:").append(bdLocation.getProvince()).append("\n");
            connrentPosition.append("市:").append(bdLocation.getCity()).append("\n");
            connrentPosition.append("县:").append(bdLocation.getDistrict()).append("\n");
            connrentPosition.append("街道:").append(bdLocation.getStreet()).append("\n");
            connrentPosition.append("定位方式:");
            if (bdLocation.getLocType() == BDLocation.TypeGpsLocation) {
                connrentPosition.append("GPS");
            } else if (bdLocation.getLocType() == BDLocation.TypeNetWorkLocation) {
                connrentPosition.append("网络定位");
            }
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    text.setText(connrentPosition);
                }
            });
        }
        @Override
        public void onConnectHotSpotMessage(String s, int i) {

        }
    }

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

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

    @Override
    protected void onDestroy() {
        super.onDestroy();
        client.stop();
        map.onDestroy();
        baidumap.setMyLocationEnabled(false);
    }
}

效果图：