纬度和经度在Android中显示为0 [英] Latitude and Longitude showing as 0 in Android

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本文介绍了纬度和经度在Android中显示为0的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

  ************* TrackGPS.java ********************** ******* 
 
导入android.app.AlertDialog; 
导入android.app.Service; 
导入android.content.Context; 
导入android.content.DialogInterface; 
导入android.content.Intent; 
 
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.Bundle; 
导入android.os.IBinder; 
导入android.provider.Settings; 
导入android.support.v4.app.ActivityCompat; 
导入android.util.Log; 
导入android.widget.Toast; 
 
 / ** 
 *由ANQ于2016年8月8日创建。 
 * / 
 
 public class TrackGPS extends Service implements LocationListener {
 
 private final Context mContext; 
 
 
布尔型checkGPS = false; 
 
 
布尔型checkNetwork = false; 
 
 boolean canGetLocation = false; 
 
位置loc; 
双纬度; 
双经度; 
 
 
 private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; 
 
 
 private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; 
受保护的LocationManager locationManager; 
 
 public TrackGPS（Context mContext）{
 this.mContext = mContext; 
 getLocation（）; 
 
 
 private Location getLocation（）{
 
 try {
 locationManager =（LocationManager）mContext 
 .getSystemService（LOCATION_SERVICE）; 
 
 //获取GPS状态
 checkGPS = locationManager 
 .isProviderEnabled（LocationManager.GPS_PROVIDER）; 
 
 //获取网络状态
 checkNetwork = locationManager 
 .isProviderEnabled（LocationManager.NETWORK_PROVIDER）; $！
 $ b if（！checkGPS&！checkNetwork）{
 Toast.makeText（mContext，No Service Provider Available，Toast.LENGTH_SHORT）.show（）; 
} else {
 this.canGetLocation = true; 
 //首先从网络供应商处获得位置
 if（checkNetwork）{
 Toast.makeText（mContext，Network，Toast.LENGTH_SHORT）.show（）; 
 
尝试{
 locationManager.requestLocationUpdates（
 LocationManager.NETWORK_PROVIDER，
 MIN_TIME_BW_UPDATES，
 MIN_DISTANCE_CHANGE_FOR_UPDATES，this）; 
 Log.d（网络，网络）; 
 if（locationManager！= null）{
 loc = locationManager 
 .getLastKnownLocation（LocationManager.NETWORK_PROVIDER）; 
 
 
 $ b if（loc！= null）{
 latitude = loc.getLatitude（）; 
 longitude = loc.getLongitude（）; 
} 
} 
 catch（SecurityException e）{
 
} 
} 
} 
 //如果GPS已启用get lat / long using GPS Services 
 if（checkGPS）{
 Toast.makeText（mContext，GPS，Toast.LENGTH_SHORT）.show（）; 
 if（loc == null）{
 try {
 locationManager.requestLocationUpdates（
 LocationManager.GPS_PROVIDER，
 MIN_TIME_BW_UPDATES，
 MIN_DISTANCE_CHANGE_FOR_UPDATES，this）; 
 Log.d（已启用GPS，已启用GPS）; 
 if（locationManager！= null）{
 loc = locationManager 
 .getLastKnownLocation（LocationManager.GPS_PROVIDER）; 
 if（loc！= null）{
 latitude = loc.getLatitude（）; 
 longitude = loc.getLongitude（）; 
 
 
} catch（SecurityException e）{
 
} 
} 
} 
 
} catch （例外e）{
 e.printStackTrace（）; 
} 
 
返回loc; 
 
 $ b $ public double getLongitude（）{
 if（loc！= null）{
 longitude = loc.getLongitude（）; 
} 
返回经度; 
 
 
 public double getLatitude（）{
 if（loc！= null）{
 latitude = loc.getLatitude（）; 
} 
返回纬度; 
} 
 
 public boolean canGetLocation（）{
 return this.canGetLocation; 
 
 $ b $ public void showSettingsAlert（）{
 AlertDialog.Builder alertDialog = new AlertDialog.Builder（mContext）; 
 
 
 alertDialog.setTitle（GPS未启用）; 
 
 alertDialog.setMessage（你想打开GPS）; 
 
 
 alertDialog.setPositiveButton（Yes，new DialogInterface.OnClickListener（）{$ b $ public void onClick（DialogInterface dialog，int which）{
 Intent intent = new Intent（Settings.ACTION_LOCATION_SOURCE_SETTINGS）; 
 mContext.startActivity（intent）; 
} 
}）; 
 
 
 alertDialog.setNegativeButton（No，new DialogInterface.OnClickListener（）{
 public void onClick（DialogInterface dialog，int which）{
 dialog.cancel ）; 
} 
}）; 
 
 
 alertDialog.show（）; 
 
 
 $ b public void stopUsingGPS（）{
 if（locationManager！= null）{
 
 locationManager.removeUpdates（TrackGPS.this ）; 
} 
} 
 
 @Override 
 public IBinder onBind（Intent intent）{
 return null; 
} 
 
 @Override 
 public void onLocationChanged（位置位置）{
 
} 
 
 @覆盖
 public void onStatusChanged（String s，int i，Bundle bundle）{
 
} 
 
 @Override 
 public void onProviderEnabled（String s）{
 
 
 
 @Override 
 public void onProviderDisabled（String s）{
 
} 
} 
 
 
 
 
 
 
 ************* MainActivity.java **************** 
 
导入android.support.v7.app.AppCompatActivity; 
导入android.os.Bundle; 
 
导入android.support.v7.app.AppCompatActivity; 
导入android.os.Bundle; 
导入android.view.View; 
导入android.widget.Button; 
导入android.widget.Toast; 
 
 public class MainActivity extends AppCompatActivity {
 
 private Button b_get; 
私有TrackGPS gps; 
双经度; 
双纬度; 
 @Override 
 protected void onCreate（Bundle savedInstanceState）{
 super.onCreate（savedInstanceState）; 
 setContentView（R.layout.activity_main）; 
 b_get =（Button）findViewById（R.id.get）; 
 
 
 
 b_get.setOnClickListener（new View.OnClickListener（）{
 @Override 
 public void onClick（View view）{
 
 gps = new TrackGPS（MainActivity.this）; 
 
 
 if（gps.canGetLocation（））{
 
 
经度= gps。 getLongitude（）; 
 latitude = gps .getLatitude（）; 
 
 Toast.makeText（getApplicationContext（），Longitude：+ Double.toString（longitude）+\\\
Latitude： + Double.toString（latitude），Toast.LENGTH_SHORT）.show（）; 
} 
 else 
 {
 
 gps.showSettingsAlert（）; 
 } 
 
} 
}）; 
 
 
 @Override 
 protected void onDestroy（）{
 super.onDestroy（）; 
 gps.stopUsingGPS（）; 
 
 
 $ / code $ / pre 
 
 
当我运行应用程序时，经度和纬度是显示为0.0，我正在使用android棉花糖来测试这个应用程序。  http：// clover。工作室/ 2016/08/09 /获取当前位置在Android使用位置经理/ 这是我用来创建应用程序的链接。
 
 
 
首先在清单文件中添加此权限
 
 > 
 
 
 < uses-permission android：name =android.permission.ACCESS_COARSE_LOCATION/> 
< uses-permission android：name =android.permission.ACCESS_FINE_LOCATION/> 
  
在您的活动中首先声明两个像这样的变量， 
 
 
  private static final int REQUEST_CODE_PERMISSION = 1; 
 String mPermission = Manifest.permission.ACCESS_FINE_LOCATION; 
  
在onCreate方法之后 
 
 
  if（Build.VERSION.SDK_INT> = 23）{
 
 if（checkSelfPermission（mPermission）！= PackageManager.PERMISSION_GRANTED）{
 ActivityCompat.requestPermissions（MainActivity。这，
 new String [] {m​​Permission，
}，
 REQUEST_CODE_PERMISSION）; 
 return; 
} 
 
 else 
 {
 *这里管理您的代码，如果权限已经访问
} 
} 
  
 
  ************* TrackGPS.java *****************************  

    import android.app.AlertDialog;
    import android.app.Service;
    import android.content.Context;
    import android.content.DialogInterface;
    import android.content.Intent;

    import android.content.pm.PackageManager;
    import android.location.Location;
    import android.location.LocationListener;
    import android.location.LocationManager;
    import android.os.Bundle;
    import android.os.IBinder;
    import android.provider.Settings;
    import android.support.v4.app.ActivityCompat;
    import android.util.Log;
    import android.widget.Toast;

    /**
     * Created by ANQ on 8/8/2016.
     */

    public class TrackGPS extends Service implements LocationListener {

        private final Context mContext;


        boolean checkGPS = false;


        boolean checkNetwork = false;

        boolean canGetLocation = false;

        Location loc;
        double latitude;
        double longitude;


        private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10;


        private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1;
        protected LocationManager locationManager;

        public TrackGPS(Context mContext) {
            this.mContext = mContext;
            getLocation();
        }

        private Location getLocation() {

            try {
                locationManager = (LocationManager) mContext
                        .getSystemService(LOCATION_SERVICE);

                // getting GPS status
                checkGPS = locationManager
                        .isProviderEnabled(LocationManager.GPS_PROVIDER);

                // getting network status
                checkNetwork = locationManager
                        .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

                if (!checkGPS && !checkNetwork) {
                    Toast.makeText(mContext, "No Service Provider Available", Toast.LENGTH_SHORT).show();
                } else {
                    this.canGetLocation = true;
                    // First get location from Network Provider
                    if (checkNetwork) {
                        Toast.makeText(mContext, "Network", Toast.LENGTH_SHORT).show();

                        try {
                            locationManager.requestLocationUpdates(
                                    LocationManager.NETWORK_PROVIDER,
                                    MIN_TIME_BW_UPDATES,
                                    MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                            Log.d("Network", "Network");
                            if (locationManager != null) {
                                loc = locationManager
                                        .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

                            }

                            if (loc != null) {
                                latitude = loc.getLatitude();
                                longitude = loc.getLongitude();
                            }
                        }
                        catch(SecurityException e){

                        }
                    }
                }
                // if GPS Enabled get lat/long using GPS Services
                if (checkGPS) {
                    Toast.makeText(mContext,"GPS",Toast.LENGTH_SHORT).show();
                    if (loc == null) {
                        try {
                            locationManager.requestLocationUpdates(
                                    LocationManager.GPS_PROVIDER,
                                    MIN_TIME_BW_UPDATES,
                                    MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                            Log.d("GPS Enabled", "GPS Enabled");
                            if (locationManager != null) {
                                loc = locationManager
                                        .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                                if (loc != null) {
                                    latitude = loc.getLatitude();
                                    longitude = loc.getLongitude();
                                }
                            }
                        } catch (SecurityException e) {

                        }
                    }
                }

            } catch (Exception e) {
                e.printStackTrace();
            }

            return loc;
        }

        public double getLongitude() {
            if (loc != null) {
                longitude = loc.getLongitude();
            }
            return longitude;
        }

        public double getLatitude() {
            if (loc != null) {
                latitude = loc.getLatitude();
            }
            return latitude;
        }

        public boolean canGetLocation() {
            return this.canGetLocation;
        }

        public void showSettingsAlert() {
            AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);


            alertDialog.setTitle("GPS Not Enabled");

            alertDialog.setMessage("Do you wants to turn On GPS");


            alertDialog.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                    mContext.startActivity(intent);
                }
            });


            alertDialog.setNegativeButton("No", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    dialog.cancel();
                }
            });


            alertDialog.show();
        }


        public void stopUsingGPS() {
            if (locationManager != null) {

                locationManager.removeUpdates(TrackGPS.this);
            }
        }

        @Override
        public IBinder onBind(Intent intent) {
            return null;
        }

        @Override
        public void onLocationChanged(Location location) {

        }

        @Override
        public void onStatusChanged(String s, int i, Bundle bundle) {

        }

        @Override
        public void onProviderEnabled(String s) {

        }

        @Override
        public void onProviderDisabled(String s) {

        }
    }






************* MainActivity.java ****************

    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;

    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;
    import android.widget.Toast;

    public class MainActivity extends AppCompatActivity {

        private Button b_get;
        private TrackGPS gps;
        double longitude;
        double latitude;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            b_get = (Button)findViewById(R.id.get);



            b_get.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {

                    gps = new TrackGPS(MainActivity.this);


                    if(gps.canGetLocation()){


                        longitude = gps.getLongitude();
                        latitude = gps .getLatitude();

                        Toast.makeText(getApplicationContext(),"Longitude:"+Double.toString(longitude)+"\nLatitude:"+Double.toString(latitude),Toast.LENGTH_SHORT).show();
                    }
                    else
                    {

                        gps.showSettingsAlert();
                    }

                }
            });
        }

        @Override
        protected void onDestroy() {
            super.onDestroy();
            gps.stopUsingGPS();
        }
    }

When i am running the application the latitude and longitude is showing as 0.0, i am using android marshmallow to test this application. "http://clover.studio/2016/08/09/getting-current-location-in-android-using-location-manager/" this is the link that i have used to create the application.
 解决方案 
Please manage required permission for marshmallow.



First you add  this permission in manifest file
 <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
 <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

After in your activity First declare two variable like this,
 private static final int REQUEST_CODE_PERMISSION = 1;
 String mPermission = Manifest.permission.ACCESS_FINE_LOCATION;

After in onCreate method
 if(Build.VERSION.SDK_INT>= 23) {

        if (checkSelfPermission(mPermission) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(MainActivity.this,
                    new String[]{mPermission,
                    },
                    REQUEST_CODE_PERMISSION);
            return;
        }

        else
        {
            *here manage your code if permission already access
        }
    }



                        
这篇关于纬度和经度在Android中显示为0的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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