安卓开发——百度地图定位当前位置

àì夳堔傛蜴生んèń 2023-10-07 14:06 76阅读 0赞

#### 1.获取百度地图的SDK，[点击下载][Link 1] ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzAwNDA0NA_size_16_color_FFFFFF_t_70_pic_center]

#### 2.注册和获取密钥，[点击获取][Link 2]。百度地图开放平台官网有较为详细的步骤 ####

#### 3.把下载得到的包解压，并将libs目录下的所有内容添加到项目的libs下 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzAwNDA0NA_size_16_color_FFFFFF_t_70]

#### 4.代码实现 ####

**（1）AndroidManifest.xml**  
添加key和service(在application标签内部)：

添加相应的权限(在application标签外部)：

<uses-permission android:name="android.permission.INTERNET" />
        
        <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
        
        <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
        
        <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
        
        <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.WRITE_EXTERNAL_STORAGE"></uses-permission>
        
        <uses-permission android:name="android.permission.INTERNET"></uses-permission>

**（2）在activity\_main.xml文件中进行布局**

**（3）MainActivity.java**

package com.example.baidumapapp;
    
    import androidx.annotation.NonNull;
    import androidx.appcompat.app.AppCompatActivity;
    import androidx.core.app.ActivityCompat;
    
    import android.Manifest;
    import android.content.pm.PackageManager;
    import android.os.Bundle;
    import android.widget.TextView;
    import android.widget.Toast;
    
    import com.baidu.location.BDLocation;
    import com.baidu.location.BDLocationListener;
    import com.baidu.location.LocationClient;
    import com.baidu.location.LocationClientOption;
    import com.baidu.mapapi.SDKInitializer;
    import com.baidu.mapapi.map.BaiduMap;
    import com.baidu.mapapi.map.MapStatusUpdate;
    import com.baidu.mapapi.map.MapStatusUpdateFactory;
    import com.baidu.mapapi.map.MapView;
    import com.baidu.mapapi.model.LatLng;
    
    public class MainActivity extends AppCompatActivity {
    
        LocationClient mLocationClient;  //定位客户端
        MapView mapView;  //Android Widget地图控件
        BaiduMap baiduMap;
        boolean isFirstLocate = true;
    
        TextView tv_Lat;  //纬度
        TextView tv_Lon;  //经度
        TextView tv_Add;  //地址
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            //如果没有定位权限，动态请求用户允许使用该权限
            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, "没有定位权限！", Toast.LENGTH_LONG).show();
                        finish();
                    } else {
                        requestLocation();
                    }
            }
        }
        private void requestLocation() {
            initLocation();
            mLocationClient.start();
        }
        private void initLocation() {  //初始化
            mLocationClient = new LocationClient(getApplicationContext());
            mLocationClient.registerLocationListener(new MyLocationListener());
            SDKInitializer.initialize(getApplicationContext());
            setContentView(R.layout.activity_main);
    
            mapView = findViewById(R.id.bmapView);
            baiduMap = mapView.getMap();
            tv_Lat = findViewById(R.id.tv_Lat);
            tv_Lon = findViewById(R.id.tv_Lon);
            tv_Add = findViewById(R.id.tv_Add);
    
            LocationClientOption option = new LocationClientOption();
            //设置扫描时间间隔
            option.setScanSpan(1000);
            //设置定位模式，三选一
            option.setLocationMode(LocationClientOption.LocationMode.Hight_Accuracy);
            /*option.setLocationMode(LocationClientOption.LocationMode.Battery_Saving);
            option.setLocationMode(LocationClientOption.LocationMode.Device_Sensors);*/
            //设置需要地址信息
            option.setIsNeedAddress(true);
            //保存定位参数
            mLocationClient.setLocOption(option);
        }
        //内部类，百度位置监听器
        private class MyLocationListener  implements BDLocationListener {
            @Override
            public void onReceiveLocation(BDLocation bdLocation) {
                tv_Lat.setText(bdLocation.getLatitude()+"");
                tv_Lon.setText(bdLocation.getLongitude()+"");
                tv_Add.setText(bdLocation.getAddrStr());
                if(bdLocation.getLocType()==BDLocation.TypeGpsLocation || bdLocation.getLocType()==BDLocation.TypeNetWorkLocation){
                    navigateTo(bdLocation);
                }
            }
        }
        private void navigateTo(BDLocation bdLocation) {
            if(isFirstLocate){
                LatLng ll = new LatLng(bdLocation.getLatitude(),bdLocation.getLongitude());
                MapStatusUpdate update = MapStatusUpdateFactory.newLatLng(ll);
                baiduMap.animateMapStatus(update);
                isFirstLocate = false;
            }
        }
        @Override
        protected void onResume() {
            super.onResume();
            mapView.onResume();
        }
        @Override
        protected void onPause() {
            super.onPause();
            mapView.onResume();
        }
        @Override
        protected void onDestroy() {
            super.onDestroy();
            mLocationClient.stop();
            mapView.onDestroy();
        }
    }

#### （5）之后再运行即可 ####

主要步骤到此结束，[查看核心代码][Link 3]

[Link 1]: http://lbs.baidu.com/index.php?title=sdk/download&action#selected=location_all
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzAwNDA0NA_size_16_color_FFFFFF_t_70_pic_center]: https://img-blog.csdnimg.cn/20200525155747613.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzAwNDA0NA==,size_16,color_FFFFFF,t_70#pic_center
[Link 2]: http://lbs.baidu.com/index.php?title=android-locsdk/guide/create-project/key
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzAwNDA0NA_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200525161851493.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzAwNDA0NA==,size_16,color_FFFFFF,t_70
[Link 3]: https://gitee.com/xgqngun/AS/tree/master/BaiduMap