0

我想通过 GPS 在谷歌地图上找到我当前的位置，但问题是它应该搜索当前位置直到特定的时间量，例如 30 秒，30 秒后 GPS 应该停止搜索或 GPS 应该自动停止。

然后我想将当前位置点保存为经度和经度。我的代码是这样的：- 

//on create

  ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo netInfo = cm.getActiveNetworkInfo();
            if (netInfo != null && netInfo.isConnected()) {


                lmngr = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
                llstnr = new MyLocationListener();


                 Criteria criteria = new Criteria();
                    provider = lmngr.getBestProvider(criteria, false);
                    Location location = lmngr.getLastKnownLocation(provider);

                    if (location != null) {

                        lmngr.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,llstnr);


                      } else {

                          Toast.makeText(getApplicationContext(), "No location found", Toast.LENGTH_LONG).show();
                      }
                //Toast.makeText(getApplicationContext(), "Connection", Toast.LENGTH_LONG).show();  

            }

            else{


                 AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
                 alertDialogBuilder.setTitle("Check Connection");
                 alertDialogBuilder
                .setMessage("No internet Connection Do U Want To Exit ?")
                .setCancelable(false)
                .setPositiveButton("Yes",new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog,int id) {

                        Nissan_Map_Final.this.finish();
                    }
                  })
                .setNegativeButton("No",new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog,int id) {
                        // if this button is clicked, just close
                        // the dialog box and do nothing
                        dialog.cancel();
                    }
                });

                 AlertDialog alertDialog = alertDialogBuilder.create();

                alertDialog.show();

          //     Toast.makeText(getApplicationContext(), "No Connection", Toast.LENGTH_LONG).show();
            }

我的位置监听器类：-

公共类 MyLocationListener 实现 LocationListener {

    @Override
    public void onLocationChanged(Location location) {
        // TODO Auto-generated method stub

        GeoPoint p = new GeoPoint((int) (location.getLatitude() * 1E6),(int) (location.getLongitude() * 1E6));
        int cur_lati = (int)location.getLatitude();
        int cur_longi = (int)location.getLongitude();   
        float   accuracy = location.getAccuracy();
        String add = " ";

        p = new GeoPoint((int) (cur_lati * 1E6),(int) (cur_longi * 1E6));
        mc = mapView.getController();
        mc.animateTo(p);
        mc.setZoom(18);

        Geocoder geoCoder = new Geocoder(getBaseContext(), Locale.getDefault());
        try {



            List<Address> addresses = geoCoder.getFromLocation(
                    p.getLatitudeE6() / 1E6,
                    p.getLongitudeE6() / 1E6, 1);

            if (addresses.size() > 0)
            {

                for (int i=0; i<addresses.get(0).getMaxAddressLineIndex();i++)
                    add += addresses.get(0).getAddressLine(i) ;

            }

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


        cur_loc.setText("Your Accuracy: " + accuracy + "\n" + "Address is:" + location.getLatitude() + "" + location.getLongitude());
    }

    @Override
    public void onProviderDisabled(String provider) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onProviderEnabled(String provider) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        // TODO Auto-generated method stub
        lmngr.removeUpdates(llstnr);
    }



}
4

2 回答 2

0

检查这个：

package cz.okhelp.timer;

import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class TimerActivity extends Activity {
TextView hTextView;
@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        hTextView = (TextView)findViewById(R.id.idTextView);
        MyTimerTask myTask = new MyTimerTask();
        Timer myTimer = new Timer();
//        public void schedule (TimerTask task, long delay, long period) 
//        Schedule a task for repeated fixed-delay execution after a specific delay.
//
//        Parameters
//        task  the task to schedule. 
//        delay  amount of time in milliseconds before first execution. 
//        period  amount of time in milliseconds between subsequent executions. 

        myTimer.schedule(myTask, 3000, 1500);        

    }
class MyTimerTask extends TimerTask {
      public void run() {
          // ERROR
         hTextView.setText("Impossible");
         // how update TextView in link below  
                 // http://android.okhelp.cz/timer-task-timertask-run-cancel-android-example/
        System.out.println("");
      }
    }


}

现在自定义您的活动以在特定时间重新加载............

于 2012-10-10T13:00:23.740 回答
0

您需要使用 Threads 来查找更新到您想要的时间的位置。并且还需要使用变量来跟踪是否找到位置。

于 2012-10-10T12:32:53.420 回答