0

現在、移動中に1分ごとに異なる緯度と経度を取得するためにGPSを使用しており、それを配列リストに保存する必要があります。これにはスレッドを使用しています。このリンクをたどりました。http://www.androidhive.info/2012/08/android-working-with-google-places-and-maps-tutorial/

そして私のコードは

トラッキング.java

package com.example.getlatlang;

import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;


public class Tracking extends Activity 
{

Button btnShowLocation;
boolean isRepeat = true;
 protected int splashTime = 1000;

 int timer =0;
Thread th;
ArrayList<Double> lat_array = new ArrayList<Double>();
ArrayList<Double> lon_array = new ArrayList<Double>();
// GPSTracker class
GPSTracker gps;

@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.currentlocation);

    btnShowLocation = (Button) findViewById(R.id.start_bt);

    // show location button click event
    btnShowLocation.setOnClickListener(new View.OnClickListener()
    {

        @Override
        public void onClick(View arg0)
        {       
            // create class object

            if(isRepeat)
            {
                isRepeat = false;
                btnShowLocation.setBackgroundResource(R.drawable.stop);
                if(lat_array.size()>0 && lon_array.size()>0)
                {
                    lat_array.clear();
                    lon_array.clear();
                    System.out.println("Array cleared...");
                }
            // check if GPS enabled th=new Thread()
                th=new Thread()
                 {
                     @Override
                        public void run(){
                            try
                            {
                               for (timer = 0; timer < 20; timer++)
                               {
                                   // int waited = 0;
                                  //  while(waited < splashTime)
                                  //  {
                                        Thread.sleep(100);
                                        runOnUiThread(new Runnable()
                                        {
                                            @Override
                                            public void run()
                                            {
                                                try
                                                {    gps = new GPSTracker(Tracking.this);
                                                    if(gps.canGetLocation())
                                                    {

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

                                                        lat_array.add(latitude);

                                                        lon_array.add(longitude);
                                                        // \n is for new line
                                                        System.out.println("lat_array"+lat_array+"lon_array"+lon_array);
                                                        Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + lat_array + "\nLong: " + lon_array, Toast.LENGTH_LONG).show();   
                                                    }
                                                    else
                                                    {
                                                        // can't get location
                                                        // GPS or Network is not enabled
                                                        // Ask user to enable GPS/network in settings
                                                        gps.showSettingsAlert();
                                                    }
                                                }
                                                catch(Exception e)
                                                {
                                                    e.printStackTrace();
                                                }
                                            }
                                        });
                                    //  waited += 100;
                                    //}
                               }}
                           catch (InterruptedException e)
                           {
                            }

                        }
                    };
                    th.start();

                }


            else
            {

                isRepeat = true;                      
                th.interrupt();
                btnShowLocation.setBackgroundResource(R.drawable.start);

            }
        }
    });
}
public void ohDestroy()
{
     th.stop();
}
}

GPSTracker.java

package com.example.getlatlang;

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

 public class GPSTracker extends Service implements LocationListener
 {

private final Context mContext;

// flag for GPS status
boolean isGPSEnabled = false;

// flag for network status
boolean isNetworkEnabled = false;

// flag for GPS status
boolean canGetLocation = false;

Location location; // location
double latitude; // latitude
double longitude; // longitude

// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters

// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute

// Declaring a Location Manager
protected LocationManager locationManager;

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

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

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

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

        if (!isGPSEnabled && !isNetworkEnabled) {
            // no network provider is enabled
        } else {
            this.canGetLocation = true;
            if (isNetworkEnabled) {
                locationManager.requestLocationUpdates(
                        LocationManager.NETWORK_PROVIDER,
                        MIN_TIME_BW_UPDATES,
                        MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                Log.d("Network", "Network");
                if (locationManager != null) {
                    location = locationManager
                            .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                    if (location != null) {
                        latitude = location.getLatitude();
                        longitude = location.getLongitude();
                    }
                }
            }
            // if GPS Enabled get lat/long using GPS Services
            if (isGPSEnabled) {
                if (location == null) {
                    locationManager.requestLocationUpdates(
                            LocationManager.GPS_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                    Log.d("GPS Enabled", "GPS Enabled");
                    if (locationManager != null) {
                        location = locationManager
                                .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                        if (location != null) {
                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
                        }
                    }
                }
            }
        }

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

    return location;
}

/**
 * Stop using GPS listener
 * Calling this function will stop using GPS in your app
 * */
public void stopUsingGPS(){
    if(locationManager != null){
        locationManager.removeUpdates(GPSTracker.this);
    }       
}

/**
 * Function to get latitude
 * */
public double getLatitude(){
    if(location != null){
        latitude = location.getLatitude();
    }

    // return latitude
    return latitude;
}

/**
 * Function to get longitude
 * */
public double getLongitude(){
    if(location != null){
        longitude = location.getLongitude();
    }

    // return longitude
    return longitude;
}

/**
 * Function to check GPS/wifi enabled
 * @return boolean
 * */
public boolean canGetLocation() {
    return this.canGetLocation;
}

/**
 * Function to show settings alert dialog
 * On pressing Settings button will lauch Settings Options
 * */
public void showSettingsAlert(){
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

    // Setting Dialog Title
    alertDialog.setTitle("GPS is settings");

    // Setting Dialog Message
    alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");

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

    // on pressing cancel button
    alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
        dialog.cancel();
        }
    });

    // Showing Alert Message
    alertDialog.show();
}

@Override
public void onLocationChanged(Location location) {
}

@Override
public void onProviderDisabled(String provider) {
}

@Override
public void onProviderEnabled(String provider) {
}

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

@Override
public IBinder onBind(Intent arg0) {
    return null;
}

 }

今私の問題は、移動中に異なる緯度と経度のポイントを取得できないことです。最初の値は 20 回だけ配列に格納されました。私はトレッドを設定しているので、そのように20回実行する必要があります. しかし、私は別のポイントを取得して配列リストに格納したいと考えています。どこでミスをしたかわかりません。この問題を解決するのを手伝ってくれる団体はありますか? 前もって感謝します。

4

2 に答える 2

1

これを適用します。10 秒ごとに更新されます。

Handler  mHandler1 = new Handler();

new Thread(new Runnable() {
    @Override
    public void run() {
        // TODO Auto-generated method stub
        while (true) {
            try {
                Thread.sleep(10000);
                mHandler1.post(new Runnable() {

                    @Override
                    public void run() {
                        // TODO Auto-generated method stub



                        // creating GPS Class object
                    GPSTracker gps = new GPSTracker (Tracking .this);

                        // check if GPS location have some values
                        if (gps.canGetLocation()) {

                            double currentlat = gps.getLatitude();
                            double currentlong = gps.getLongitude();



                        } else {
                            // no current location
                            gps.showSettingsAlert();
                        }
                    }
                });
            } catch (Exception e) {
                // TODO: handle exception
            }
        }
    }
}).start();
于 2013-09-26T04:45:08.850 に答える
1

sleep(100)緯度を収集するループで使用しました。
ここでは時間の単位はマイクロ秒です。(私の知る限り)
20*100 = 2000 で、これはちょうど 2 秒です。GPSの更新はそれほど速くないと思います。
これを見てください。

むしろ、同じループを使用できますが、前のものと異なる場合にのみ値を保存します。

if(oldLat != curLat){
  //store curLat to array
  //and make oldLat = curLat
}
于 2013-09-26T05:04:01.370 に答える