不起作用。
import android.app.Activity;
import android.content.Context;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.Toast;
public class SimpleLocation extends Activity implements LocationListener {
private LocationManager locationManager;
private String provider;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.main);
// Get the location manager
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
// Define the criteria how to select the locatioin provider -> use
// default
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(provider);
// Initialize the location fields
if (location != null) {
System.out.println("Provider " + provider + " has been selected.");
int lat = (int) (location.getLatitude());
int lng = (int) (location.getLongitude());
Toast.makeText(getApplicationContext(),
"Lat:" + lat + " Lng:" + lng, Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(), "No Value",
Toast.LENGTH_LONG).show();
}
}
/* Request updates at startup */
@Override
protected void onResume() {
super.onResume();
locationManager.requestLocationUpdates(provider, 400, 1,
(LocationListener) this);
}
/* Remove the locationlistener updates when Activity is paused */
@Override
protected void onPause() {
super.onPause();
locationManager.removeUpdates((LocationListener) this);
}
public void onLocationChanged(Location location) {
int lat = (int) (location.getLatitude());
int lng = (int) (location.getLongitude());
Toast.makeText(getApplicationContext(),
"onLocationChanged Lat:" + lat + " Lng:" + lng,
Toast.LENGTH_LONG).show();
}
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
public void onProviderEnabled(String provider) {
Toast.makeText(this, "Enabled new provider " + provider,
Toast.LENGTH_SHORT).show();
}
public void onProviderDisabled(String provider) {
Toast.makeText(this, "Disabled provider " + provider,
Toast.LENGTH_SHORT).show();
}
}
答案 0 :(得分:0)
locationManager.requestLocationUpdates(provider, 400, 1,
(LocationListener) this);
格式为:
requestLocationUpdates(String provider, long minTime, float minDistance, LocationListener listener)
代码中的这一行指定只有在距离移动最小的“1”时,才会在应用程序中注册位置更改。将其设置为0并尝试再次运行代码。或者将minTime和minDistance都设置为0并尝试。