相关疑难解决方法(0)

我想谷歌地图显示用户的位置.我尝试了这段代码,但它在Android 6上无效.

private GoogleMap map;
LocationManager lm;
LocationListener ll;
Location l;

LatLng pos;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.start_layout);

    lm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
    ll = new LocationListener() {
        @Override
        public void onLocationChanged(Location location) {
            l = (Location) location;
        }

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {}

        @Override
        public void onProviderEnabled(String provider) {}

        @Override
        public void onProviderDisabled(String provider) {}
    };

    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.nMap);
    mapFragment.getMapAsync(this);
}

@Override
public void onMapReady(GoogleMap googleMap) {
    map = …

我想在地图上显示我的位置并放大它.我想使用GoolgeAPIClient.地图渲染和指针创建但位置错误.我觉得即使在调用GoogleAPIClient的onConnected方法之前,也会先执行onMapReady.请帮助这是我的代码.

import android.location.Location;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.LatLngBounds;
import com.google.android.gms.maps.model.MarkerOptions;


public class MapsActivity extends FragmentActivity implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
    protected static final String TAG = "MainActivity";

    /**
     * Provides the entry point to Google Play services.
     */
    protected GoogleApiClient mGoogleApiClient;

    /**
     * Represents a geographical location.
     */
    protected Location mLastLocation;

    protected String mLatitudeLabel;
    protected …

java.lang.SecurityException: Client must have ACCESS_COARSE_LOCATION or ACCESS_FINE_LOCATION permission to perform any location operations.

该应用程序适用于Android版本5(Lollipop),但在Android版本6上获得安全例外.

我尝试了几个教程,但没有运气获得当前坐标,也许我不能跟随或真的不知道如何设置一个.

抱歉是新手.我只是想创建一个通过gps获取当前位置的应用程序,无论位置是否发生变化.我可以设法获得最后的已知位置但无法实现以获得实时坐标.非常感谢有一个完整的资源来展示解决方案.部分代码我很容易迷失.

先感谢您.

我开发了一个简单的Android应用程序,在这个简单的应用程序中我想获得GPS Latitued和Longitued数据,它在我的模拟器中正常工作但是当我安装在真正的Android设备上时它不起作用.请帮我解决这个问题,以下是我的代码.提前致谢

public class getLocation extends AppCompatActivity {

private Button btnGetLocation;
private TextView textGPS;
private LocationManager locationManager;
private LocationListener locationListener;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_get_location);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);


    getSupportActionBar().setDisplayHomeAsUpEnabled(true);

    btnGetLocation = (Button) findViewById(R.id.btnGetLocation);
    textGPS = (TextView) findViewById(R.id.textViewGps);
    locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

    locationListener = new LocationListener() {
        @Override
        public void onLocationChanged(Location location) {
            textGPS.setText("lat: "+location.getLatitude()+" long: "+location.getLongitude());

        }

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {

        }

        @Override
        public void onProviderEnabled(String provider) { …

我具有以下函数，可向我返回设备的当前位置：

void getCurrentLocation()
{
    Location myLocation  = map.getMyLocation();
    if(myLocation!=null)
    {
        double dLatitude = myLocation.getLatitude();
        double dLongitude = myLocation.getLongitude();
        map.addMarker(new MarkerOptions().position(new LatLng(dLatitude, dLongitude))
                .title("My Location").icon(BitmapDescriptorFactory
                        .defaultMarker(BitmapDescriptorFactory.HUE_RED)));
        map.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(dLatitude, dLongitude), 8));

    }
    else
    {
        Toast.makeText(this, "Unable to fetch the current location", Toast.LENGTH_SHORT).show();
    }
}

但是有些方法显示为红色，就像未定义一样：

如您所见，这些方法与map有关，可以在onMapReady（）函数中使用，但无法显示它。这是为什么？我必须添加哪些库？我这样声明地图：

private MapFragment map;

我试图放大用户在地图上的当前位置.该位置绝对可以访问,因为它在地图上显示为蓝点

但是,GoogleMap.getMyLocation()返回null.

为了启用位置数据,我遵循了Google文档,并在清单中添加了适当的权限,此外还添加了必要的API密钥.

如果它对我的所有MyActivity.java都有帮助:

package com.example.beckah.helloworld;

import android.support.v4.app.FragmentActivity;
import android.os.Bundle;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import android.location.Location;
import android.location.LocationListener;
import android.content.Context;
import android.location.LocationManager;

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {

    private GoogleMap mMap;
    private LatLng location;
    Location mLocation;
    LocationManager locationManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps);
        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager() …