2024.5.23

第五十五天

所花时间：2小时

代码量：300

博客量：1

了解到的知识点：

团队作业6

地图界面设计（这里需要调用接口，可以在高德地图的开发者平台上申请key）

package com.example.share;

import android.Manifest;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.fragment.app.Fragment;
import com.amap.api.maps.AMap;
import com.amap.api.maps.MapView;
import com.amap.api.maps.model.LatLng;
import com.amap.api.maps.model.MarkerOptions;
import com.amap.api.location.AMapLocation;
import com.amap.api.location.AMapLocationClient;
import com.amap.api.location.AMapLocationClientOption;
import com.amap.api.location.AMapLocationListener;

public class DituFragment extends Fragment implements AMapLocationListener {
    private MapView mapView;
    private AMap aMap;
    private AMapLocationClient mlocationClient;
    private AMapLocationClientOption mLocationOption;
    private static final int REQUEST_LOCATION_PERMISSION = 100;

    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_ditu, container, false);
        mapView = view.findViewById(R.id.map);
        mapView.onCreate(savedInstanceState);
        if (aMap == null) {
            aMap = mapView.getMap();
            aMap.setMyLocationEnabled(true);
            aMap.setOnMyLocationChangeListener(this::onMyLocationChange);
        }
        if (ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(getActivity(), new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_LOCATION_PERMISSION);
        } else {
            try {
                // 更新隐私合规状态
                updatePrivacyShow(true);
                updatePrivacyAgree(true);

                // 初始化位置服务
                initLocation();
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
        addScenicSpotMarkers();
        return view;
    }

    public void onMyLocationChange(Location location) {
        if (location != null) {
            AMapLocation amapLocation = new AMapLocation(location);
            onLocationChanged(amapLocation);
        } else {
            Log.e("AmapErr", "Location is null");
        }
    }

    private void initLocation() throws Exception {
        mlocationClient = new AMapLocationClient(getActivity());
        mLocationOption = new AMapLocationClientOption();
        mlocationClient.setLocationListener(this);
        mLocationOption.setLocationMode(AMapLocationClientOption.AMapLocationMode.Hight_Accuracy);
        mlocationClient.setLocationOption(mLocationOption);
        mlocationClient.startLocation();
    }

    // 更新隐私合规状态接口调用示例
    private void updatePrivacyShow(boolean show) {
        // 在这里调用你的隐私合规接口，例如：
        // PrivacyManager.updatePrivacyShow(show);
        AMapLocationClient.updatePrivacyShow(getActivity(), true, true);
    }

    // 更新用户隐私同意状态接口调用示例
    private void updatePrivacyAgree(boolean agree) {
        // 在这里调用你的隐私合规接口，例如：
        // PrivacyManager.updatePrivacyAgree(agree);
        AMapLocationClient.updatePrivacyAgree(getActivity(), true);
    }

    private void addScenicSpotMarkers() {
        LatLng spot1 = new LatLng(39.906901, 116.397972); // 替换为实际景点坐标
        LatLng spot2 = new LatLng(39.908901, 116.397972); // 替换为实际景点坐标

        aMap.addMarker(new MarkerOptions().position(spot1).title("景点1").snippet("景点1描述"));
        aMap.addMarker(new MarkerOptions().position(spot2).title("景点2").snippet("景点2描述"));
    }

    @Override
    public void onLocationChanged(AMapLocation amapLocation) {
        if (amapLocation != null && amapLocation.getErrorCode() == 0) {
            checkInAtScenicSpot(amapLocation);
        } else {
            String errText = "定位失败," + amapLocation.getErrorCode() + ": " + amapLocation.getErrorInfo();
            Log.e("AmapErr", errText);
        }
    }

    private void checkInAtScenicSpot(AMapLocation location) {
        LatLng userLocation = new LatLng(location.getLatitude(), location.getLongitude());

        LatLng spot1 = new LatLng(39.906901, 116.397972); // 替换为实际景点坐标
        float[] result = new float[1];
        Location.distanceBetween(userLocation.latitude, userLocation.longitude, spot1.latitude, spot1.longitude, result);
//        if (result[0] < 100) { // 假设距离小于100米即为接近景点
//            String username = getUsername();
//            if (!username.isEmpty()) {
//                DatabaseHelper dbHelper = new DatabaseHelper(getActivity());
//                dbHelper.addCheckIn(username, "景点1");
//                Toast.makeText(getActivity(), "成功打卡景点1", Toast.LENGTH_SHORT).show();
//            } else {
//                Toast.makeText(getActivity(), "用户未登录", Toast.LENGTH_SHORT).show();
//            }
//        }
    }

    private String getUsername() {
        SharedPreferences sharedPref = getActivity().getSharedPreferences("app_prefs", Context.MODE_PRIVATE);
        return sharedPref.getString("username", "");
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        if (requestCode == REQUEST_LOCATION_PERMISSION) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                try {
                    initLocation();
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            } else {
                Toast.makeText(getActivity(), "定位权限被拒绝", Toast.LENGTH_SHORT).show();
            }
        }
    }

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

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

    @Override
    public void onDestroy() {
        super.onDestroy();
        mapView.onDestroy();
        if (mlocationClient != null) {
            mlocationClient.onDestroy();
        }
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        mapView.onSaveInstanceState(outState);
    }
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.amap.api.maps.MapView
        android:id="@+id/map"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</RelativeLayout>