如何强制Android重新读取GPS位置？

Question

I try to write application, which shows GPS coordinates on button click.

@Override
public void onClick(View arg0) {
    EditText editText;
    editText = (EditText) findViewById(R.id.editText1);
    LocationManager locationManager;
    locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
    Location location = locationManager.getLastKnownLocation("gps");
    editText.setText(location.toString());
}

Is problem: while in first time I got coordinates of location with time of GPS reading, second click get the same location. Even when I stop program and run again, it get the same location! How enforce to refresh reading GPS?

Answer 1

while in first time I got coordinates of location with time of GPS reading, second click get the same location

That is not surprising.

Even when I stop program and run again, it get the same location!

That too is not surprising.

How enforce to refresh reading GPS?

Generally speaking, you don't. There is no requirement that the device has to have a fresh update just because you request the last-known location. It may be physically impossible to provide a new location fix. And, if you are not calling requestLocationUpdates() , it is very possible for getLastKnownLocation() to simply return null .

Your parameters to requestLocationUpdates() may have some impact for how aggressively the device tries to update GPS, versus saving power. However, there are no guarantees.

Answer 2

Try to get best provider that available to fetch the Location data , using this code before you get the location

Criteria criteria = new Criteria();
String bestProvider = locationManager.getBestProvider(criteria, false);

and in your getLastKnownLocation pass the best Location Provider to get the location like this

 Location location = locationManager.getLastKnownLocation(bestProvider );