网络定位和GPS定位

——首先准备LBS SDK ，下载基础地图和定位功能这两个SDK，解压包中会有一个libs目录：
——libs目录下的内容分为两部分，BaiduLBS_Android.jar, so文件
——Android studio中app模板下有一个libs目录，存放Jar包的，将BaiduLBS_Android.jar 文件复制到该目录下。
—— Android studio中的 src/main目录，右键该目录——new ——Directory,名为jniLibs目录，将so文件拷贝到此目录下。

在app/build.gradle下，添加此配置：

    compile fileTree(dir: 'libs',includes: ['*.jar']) //将libs 目录下所有以.jar结尾的文件添加到当前项目的引用中

activity_main.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.lnjr.lbstest.MainActivity">
    <!--确定自己的经纬度-->
    <TextView
        android:id="@+id/position_text_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>

修该AndroidManifest中代码：
百度LBS，SDK内部用的权限

    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"></uses-permission>
    <uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>

 <application

     <meta-data
            android:name="com.baidu.lbsapi.API_KEY"
            android:value="i6VD2fHKM3msMfZtIOXAhFSzDiYGFIwL">
        </meta-data>

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

        </service>
 </application>

MainActivity.java:


public class MainActivity extends AppCompatActivity {
    public LocationClient mLocationClient; //创建一个LocationClient实例
    private TextView positionText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mLocationClient = new LocationClient(getApplicationContext()); //调用方法，获取实例
        mLocationClient.registerLocationListener(new MyLocationListener());//注册一个定位监听器
        setContentView(R.layout.activity_main);
        positionText = findViewById(R.id.position_text_view);
        List<String> permissionList = new ArrayList<>();//创建一个空的List集合，
        // 然后判断这三个权限有没有被授权，如果没被授权就添加到List集合中
        if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            permissionList.add(Manifest.permission.ACCESS_FINE_LOCATION);
        }
        if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
            permissionList.add(Manifest.permission.READ_PHONE_STATE);
        }
        if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
            permissionList.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
        }
        if (!permissionList.isEmpty()) {
            //将List转换成数组，调用requestPermissions（）方法一次性申请
            String[] permissions = permissionList.toArray(new String[permissionList.size()]);
            ActivityCompat.requestPermissions(MainActivity.this, permissions, 1);
        } else {
            requestLocation();
        }

    }

    //当所有权限都被用户同意了，才会调用此方法，开始地理位置定位
    private void requestLocation() {
        initLocation();
        mLocationClient.start(); //回调前面的监听器
    }

    private void initLocation() {
        LocationClientOption option = new LocationClientOption();
        option.setScanSpan(5000);//设置更新的间隔，每5秒会更新一下当前位置
        option.setLocationMode(LocationClientOption.LocationMode.Device_Sensors); //转换GPS定位
        option.setIsNeedAddress(true);//需要获取当前位置的详细地址
        mLocationClient.setLocOption(option);
    }

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

    @Override//通过循环将申请的每一个权限进行判断如果有任何一个权限被拒绝，就直接调用finfish（）方法关闭当前程序

    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        switch (requestCode) {
            case 1:
                if (grantResults.length > 0) {
                    for (int result : grantResults) {
                        if (result != PackageManager.PERMISSION_DENIED) {
                            Toast.makeText(this, "必须同意所有权限才能使用本程序", Toast.LENGTH_SHORT).show();
                            finish();
                            return;
                        }
                    }
                    requestLocation();
                } else {
                    Toast.makeText(this, "发生未知错误", Toast.LENGTH_SHORT).show();
                    finish();
                }
                break;
            default:
        }
    }

    private class MyLocationListener implements BDLocationListener {
        @Override
        public void onReceiveLocation(final BDLocation location) {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    //getLatitude（）方法，获取当前位置纬度
                    //getLongitude()方法，获取当前位置经度
                    //getLocType（）方法，获取当前的定位方式
                    StringBuilder currentPosition = new StringBuilder();
                    currentPosition.append("纬度：").append(location.getLatitude()).append("\n");
                    currentPosition.append("经度：").append(location.getLongitude()).append("\n");

 currentPosition.append("国家：").append(location.getCountry()).append("\n");
                    currentPosition.append("省：").append(location.getProvince()).append("\n");
                    currentPosition.append("市：").append(location.getCity()).append("\n");
                    currentPosition.append("区：").append(location.getDistrict()).append("\n");
                    currentPosition.append("街道：").append(location.getStreet()).append("\n");
                    currentPosition.append("定位方式：");
                    if (location.getLocType() == BDLocation.TypeGpsLocation) {
                        currentPosition.append("GPS");
                    } else if (location.getLocType() == BDLocation.TypeNetWorkLocation) {
                        currentPosition.append("网络");
                    }
                    //将结果组装成一个字符串，显示到TextView上
                    positionText.setText(currentPosition);
                }
            });
        }

    }
}

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