从Android向数据库发送GPS经度和纬度

Question

我正在开发一个Android应用程序，它应该使用php将gps位置发送到mysql数据库。 我有Set_Location类，它在单击按钮时获取用户的gps位置，而BackgroundLocation类应该将这些坐标发送到mysql数据库。传递这些值时遇到问题。我在BackgroundLocation类上使用上下文并将值作为参数传递。这是我的Set_Location类：

package com.example.bensonkorir.m_ulinzi;

import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.provider.Settings;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;


public class Set_Location extends AppCompatActivity implements LocationListener {
private Button button;
private TextView textView,latitude,longitude;
private LocationListener locationListener;
private LocationManager locationManager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_set__location);
    button = (Button) findViewById(R.id.button);
    textView = (TextView) findViewById(R.id.textView);
    latitude = (TextView) findViewById(R.id.lat);
    longitude = (TextView) findViewById(R.id.lon);
    locationManager=(LocationManager)getSystemService(LOCATION_SERVICE);
    locationListener = new LocationListener() {
        @Override
        public void onLocationChanged(Location location) {

            double lat= location.getLatitude();
            double lon= location.getLongitude();
            String type="location";
            latitude.setText(Double.toString(lat));
            longitude.setText(Double.toString(lon));
            String lat2 = String.valueOf(location.getLatitude());
            String lon2= String.valueOf(location.getLongitude());
            BackgroundLocation backgroundLocation = new BackgroundLocation(this);
            backgroundLocation.execute(type, lat2,lon2);


            textView.append("\n"+location.getLatitude()+","+location.getLongitude());
        }

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

        }

        @Override
        public void onProviderEnabled(String provider) {

        }

        @Override
        public void onProviderDisabled(String provider) {

            Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            startActivity(intent);
        }
    };
    ConfigureButton();
}


private void ConfigureButton() {

    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            locationManager.requestLocationUpdates("gps",5000,0,locationListener);

        }
    });

}
}

这是我的BackgroundLocation类：

package com.example.bensonkorir.m_ulinzi;

import android.app.AlertDialog;
import android.content.Context;

import android.location.LocationListener;
import android.os.AsyncTask;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;

public class BackgroundLocation extends AsyncTask<String, Void, String> {
LocationListener locationListener;
AlertDialog alertDialog;
BackgroundLocation (LocationListener locationListener){  this.locationListener= locationListener;}

@Override
protected String doInBackground(String... params) {
    String Register_Url= "http://192.168.43.254/register2.php";
    String type = params[0];
    if(type.equals("location")){
        try {
            String langitude=params[1];
            String longitude=params[2];


            URL url= new URL(Register_Url);
            HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoInput(true);
            OutputStream outputStream = httpURLConnection.getOutputStream();
            BufferedWriter bufferedWriter  = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
            String post_data= URLEncoder.encode("username", "UTF-8")+"="+URLEncoder.encode(String.valueOf(langitude),"UTF-8")+"&"
                    +URLEncoder.encode("password","UTF-8")+"="+URLEncoder.encode(String.valueOf(longitude),"UTF-8");
            bufferedWriter.write(post_data);
            bufferedWriter.flush();
            bufferedWriter.close();
            outputStream.close();
            InputStream inputStream = httpURLConnection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"iso-8859-1"));
            String result="";
            String line;
            while ((line=bufferedReader.readLine())!=null){
                result += line;
            }
            bufferedReader.close();;
            inputStream.close();
            httpURLConnection.disconnect();
            return result;
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
    return  null;

}

@Override
protected void onPreExecute() {
    alertDialog= new AlertDialog.Builder((Context) locationListener).create();
    alertDialog.setTitle(" Status");
}

@Override
protected void onProgressUpdate(Void... values) {
    super.onProgressUpdate(values);
}

@Override
protected void onPostExecute(String result) {
    alertDialog.setMessage(result);
    alertDialog.show();
}
}

请帮助我，或指出我正确的方向，谢谢。