基于位置的android应用 Location LocationManager

基于位置的android应用 Location LocationManager

package com.javacodegeeks.android.lbs;import android.app.Activity;import android.content.Context;import android.location.Location;import android.location.LocationListener;import android.location.LocationManager;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;public class LbsGeocodingActivity extends Activity {        private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 1; // in Meters    private static final long MINIMUM_TIME_BETWEEN_UPDATES = 1000; // in Milliseconds        protected LocationManager locationManager;        protected Button retrieveLocationButton;        @Override    public void onCreate(Bundle savedInstanceState) {                super.onCreate(savedInstanceState);        setContentView(R.layout.main);        retrieveLocationButton = (Button) findViewById(R.id.retrieve_location_button);                locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);                locationManager.requestLocationUpdates(                LocationManager.GPS_PROVIDER,                 MINIMUM_TIME_BETWEEN_UPDATES,                 MINIMUM_DISTANCE_CHANGE_FOR_UPDATES,                new MyLocationListener()        );            retrieveLocationButton.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                showCurrentLocation();            }    });                    }        protected void showCurrentLocation() {        Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);        if (location != null) {            String message = String.format(                    "Current Location \n Longitude: %1$s \n Latitude: %2$s",                    location.getLongitude(), location.getLatitude()            );            Toast.makeText(LbsGeocodingActivity.this, message,                    Toast.LENGTH_LONG).show();        }    }       private class MyLocationListener implements LocationListener {        public void onLocationChanged(Location location) {            String message = String.format(                    "New Location \n Longitude: %1$s \n Latitude: %2$s",                    location.getLongitude(), location.getLatitude()            );            Toast.makeText(LbsGeocodingActivity.this, message, Toast.LENGTH_LONG).show();        }        public void onStatusChanged(String s, int i, Bundle b) {            Toast.makeText(LbsGeocodingActivity.this, "Provider status changed",                    Toast.LENGTH_LONG).show();        }        public void onProviderDisabled(String s) {            Toast.makeText(LbsGeocodingActivity.this,                    "Provider disabled by the user. GPS turned off",                    Toast.LENGTH_LONG).show();        }        public void onProviderEnabled(String s) {            Toast.makeText(LbsGeocodingActivity.this,                    "Provider enabled by the user. GPS turned on",                    Toast.LENGTH_LONG).show();        }    }    }

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