无法使用LocationListener android studio 2.3在日志中显示当前位置

我正在尝试获取用户的当前位置并在日志中显示它

下面是我的主要活动Java代码

import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;

public class MainActivity extends AppCompatActivity {

LocationManager locationManager;
LocationListener locationListener;

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

    locationManager = (LocationManager)this.getSystemService(Context.LOCATION_SERVICE);

    locationListener = new LocationListener() {
        @Override
        public void onLocationChanged(Location location) {

            Log.i("Location",location.toString());
        }

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

        }

        @Override
        public void onProviderEnabled(String provider) {

        }

        @Override
        public void onProviderDisabled(String provider) {

        }
    };

    //If the device is running version older than Marshmallow

    if(Build.VERSION.SDK_INT<23)
    {
        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,locationListener);
    }

    else
    {
        //Checking if it has permission access
        if(ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)
        {
            //ask for permission

            ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.ACCESS_FINE_LOCATION},1);


        }
        else
        {
            //we have permission

            locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,locationListener);
        }
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);

    if(ContextCompat.checkSelfPermission(this,Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED)
    {
        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,locationListener);
    }
}

导入android.Manifest；
导入android.content.Context；
导入android.content.pm.PackageManager；
导入android.location.location；
导入android.location.LocationListener；
导入android.location.LocationManager；
导入android.os.Build；
导入android.os.Bundle；
导入android.support.annotation.NonNull；
导入android.support.v4.app.ActivityCompat；
导入android.support.v4.content.ContextCompat；
导入android.support.v7.app.AppActivity；
导入android.util.Log；
公共类MainActivity扩展了AppCompatActivity{
地点经理地点经理；
LocationListener LocationListener；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
locationManager=（locationManager）this.getSystemService（Context.LOCATION\u服务）；
locationListener=新locationListener（）{
@凌驾
已更改位置上的公共无效（位置）{
Log.i（“Location”，Location.toString（））；
}
@凌驾
public void onStatusChanged（字符串提供程序、int状态、Bundle extra）{
}
@凌驾
公共无效onProviderEnabled（字符串提供程序）{
}
@凌驾
公共无效onProviderDisabled（字符串提供程序）{
}
};
//如果设备运行的版本早于棉花糖
如果（Build.VERSION.SDK_INT，首先您需要将移动到
LocationListener
之外的
onCreate（）
：

您使用位置服务的方式已过时。请检查：您可以在哪里找到推荐的方式。实际方式是通过Google Api客户端请求位置更新（或最近已知的位置，如果可用）。希望有帮助。实际上，您的代码看起来应该按原样工作。设备上的位置模式设置为什么？我应该将
LocationListener
移动到哪里？仅在ur
MainActivity
类外部
onCreate
但我确实在onCreate外部声明了
LocationListener
是的，您还必须移动I
LocationListener
外部
onCreate
的初始化和方法。请检查我的更新答案。
public class MainActivity extends AppCompatActivity {

LocationManager locationManager;
LocationListener locationListener;

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

   if(Build.VERSION.SDK_INT<23)
    {
        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,locationListener);
    }

    else
    {
        //Checking if it has permission access
        if(ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)
        {
            //ask for permission

            ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.ACCESS_FINE_LOCATION},1);


        }
        else
        {
            //we have permission

            locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,locationListener);
        }
    }
}


  locationListener = new LocationListener() {
        @Override
        public void onLocationChanged(Location location) {

            Log.i("Location",location.toString());
        }

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

        }

        @Override
        public void onProviderEnabled(String provider) {

        }

        @Override
        public void onProviderDisabled(String provider) {

        }
    };

    .....
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);

    switch (requestCode) {
        case 1: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,locationListener);

            } else {
                Toast.makeText(getApplicationContext(), "Please provide permission.", Toast.LENGTH_LONG).show();
            }
            break;
        }
    }
}