如何在android中存储每2分钟的位置坐标

Question

我刚刚开始学习android，但无法得到正确的想法，如何处理此问题，所以我想存储每2分钟的位置坐标，如果我旅行在公共汽车。

我在用的：

public class AndroidGPSTrackingActivity extends Activity { 

    Button btnShowLocation; 

    // GPSTracker class 
    GPSTracker gps; 
    TextView tv; 
    ArrayList<String> cordsList= new ArrayList<String>(); 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     tv=new TextView(this); 
     btnShowLocation = (Button) findViewById(R.id.btnShowLocation); 
     btnShowLocation.setText("Start Save Location"); 
     Log.i("Finall", "AndroidGPSTrackingActivity-> "); 
     // show location button click event 
     btnShowLocation.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View arg0) {   
       // create class object 
       gps = new GPSTracker(AndroidGPSTrackingActivity.this); 

       // check if GPS enabled  
       if(gps.canGetLocation()){ 

        double latitude = gps.getLatitude(); 
        double longitude = gps.getLongitude(); 
        String longlat=String.valueOf(latitude)+":"+String.valueOf(longitude); 
        cordsList.add(longlat); 
        // \n is for new line 
        Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, 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(); 
       } 

       Log.i("Finall", "Location-> "+cordsList.toString()); 
      } 
     }); 
    } 

我得到的时间，但无法得到每30以及在哪里存储。

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 * 2; // 2 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); 
      locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 
        10000, // 3 sec 
        10, this); 
      // 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(); 

          Log.i("location", "->longitude>> "+longitude); 
         } 
        } 
       } 
       // 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(); 
            Log.i("location", "latitude->longitude>> "+latitude); 
          } 
         } 
        } 
       } 
      } 

     } 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(); 
     } 
     Log.i("latitude", "latitude-> "+latitude); 
     // return latitude 
     return latitude; 
    } 

    /** 
    * Function to get longitude 
    * */ 
    public double getLongitude(){ 
     if(location != null){ 
      longitude = location.getLongitude(); 
     } 
     Log.i("longitude", "longitude-> "+latitude); 
     // 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) { 
     Log.i("onLocationChanged", "onLocationChanged-> "+latitude+"---- "+longitude); 
    } 

    @Override 
    public void onProviderDisabled(String provider) { 
    } 

    @Override 
    public void onProviderEnabled(String provider) { 
    } 

    @Override 
    public void onStatusChanged(String provider, int status, Bundle extras) { 
     Log.i("onStatusChanged", "onLocationChanged-> "+latitude+"---- "+longitude); 
    } 

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

} 

你好，每一个机构，任何想法，如果我出差总线和我的GPS上，然后我行驶20分钟后，然后我要保存阵列10坐标。任何想法，如何做到这一点。并在点击STOP按钮后停止。

感谢Adavance。

Answer 1

你是可以使用在Android中Timer类，这将给你的TIME_INTERVAL调用这个类。在你的情况，你可以给TIME_INTERVAL = 20000

这里是我的示例代码：

public class MainActivity extends Activity { 

     Timer timer = new Timer(); 
     GpsTracker gpsTracker ; 
     ArrayList<Double> arrLat= new ArrayList<Double>(); 
     ArrayList<Double> arrLng = new ArrayList<Double>(); 
     private final int TIME_INTERVAL = 20000; 


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


     gpsTracker = new GPSTracker(this); 

    timer.scheduleAtFixedRate(new TimerTask() { 

     @SuppressLint("DefaultLocale") 
     @TargetApi(Build.VERSION_CODES.GINGERBREAD) 
     @Override 
     public void run() { 

      latitude = GPSTracker.getLatitude(); 
      longitude = GPSTracker.getLongitude(); 
      System.out.println("lat------ "+latitude); 
      System.out.println("lng-------- "+longitude); 

      arrLat.add(latitude); 
      arrLng.add(longitude); 

     } 
    }, 0, TIME_INTERVAL); 


    } 

}