Question

我是Android新手，我正在尝试开发一个Android应用程序，其中包括跟踪用户位置详细信息并在Google地图上显示，并且只要更改了地图就应该在地图中更新。我无法理解如何通过谷歌地图v2获取此信息。他们提到改变依赖关系，但是我无法找到在哪里做，任何人都可以通过一个简单的例子来解释这个问题的用法我尝试实现下面链接中给出的步骤，但是我无法找到项目属性编辑 https://docs.google.com/document/pub?id=19nQzvKP-CVLd7_VrpwnHfl-AE9fjbJySowONZZtNHzw

Answer 1

如果您想要更改其位置时需要在地图上显示用户的位置，位置API和Google Map API，

这里是你的app level level1中的依赖关系链接，

dependencies {
    compile 'com.google.android.gms:play-services-maps:10.0.1'
    compile 'com.google.android.gms:play-services:10.0.1'
}

然后，您需要在地图上启动更新位置的位置服务后，还需要初始化地图

在这里，我认为你初步化了你的地图展示我只是展示了如何使用location api，

import android.*;
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GoogleApiAvailability;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.model.LatLng;

public class MainLocationActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks, LocationListener, GoogleApiClient.OnConnectionFailedListener {
    private static final float DISTANCE_FOR_FISPLACEMENT = 2; //here is the distance for update map in meter
    private Context context;
    private GoogleApiClient mGoogleApiClient;
    private LocationRequest mLocationRequest;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        context=this;
        if (checkPermsion(context)) {
            setupLocationService(context);
        }
    }

    public boolean checkPermsion(Context context) {
        int MyVersion = Build.VERSION.SDK_INT;
        if (MyVersion > Build.VERSION_CODES.LOLLIPOP_MR1) {
            if (ContextCompat.checkSelfPermission(context, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                return false;
            } else if (ContextCompat.checkSelfPermission(context, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                return false;
            } else {
                return true;
            }
        } else {
            return true;
        }
    }

    private void setupLocationService(Context context) {
        if (checkPlayServices()) {
            mGoogleApiClient = new GoogleApiClient.Builder(context)
                    .addApi(LocationServices.API)
//                    .addApi(ActivityRecognition.API)
                    .addConnectionCallbacks(this)
                    .addOnConnectionFailedListener(this)
                    .build();
            createLocationRequest();
        }
    }
    protected void createLocationRequest() {
        mLocationRequest = new LocationRequest().create()
                .setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY)
                .setFastestInterval(5 * 60 * 1000)
                .setInterval(5 * 60 * 1000)
                .setSmallestDisplacement(DISTANCE_FOR_FISPLACEMENT);
        mGoogleApiClient.connect();
    }
    private boolean checkPlayServices() {
        GoogleApiAvailability googleAPI = GoogleApiAvailability.getInstance();
        int result = googleAPI.isGooglePlayServicesAvailable(this);
        if (result != ConnectionResult.SUCCESS) {
            return false;
        }
        return true;
    }

    @Override
    public void onConnected(@Nullable Bundle bundle) {
        Log.i(TAG, "Connected to onConnected");
        startLocationUpdates();
    }

    @Override
    public void onConnectionSuspended(int i) {

    }
    private void startLocationUpdates() {
        if (mGoogleApiClient.isConnected()) {
            if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                return;
            }
            LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
        }
    }

    @Override
    public void onLocationChanged(Location location) {
        mMap.animateCamera(CameraUpdateFactory.newLatLng(new LatLng(location.getLatitude(), location.getLongitude())));
        // Also here you can change your pin in map
    }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

    }
}

位置查找器以及使用谷歌地图v2的更新

1 个答案: