MainActivity.java:
public class MainActivity extends Activity {
LocationManager locationManager ;
String provider;
TextView location_msg;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
location_msg = (TextView) findViewById(R.id.location_msg);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
List providerList = locationManager.getProviders(true);
if(providerList.contains(LocationManager.GPS_PROVIDER))
{
provider = LocationManager.GPS_PROVIDER;
}
else if(providerList.contains(LocationManager.NETWORK_PROVIDER))
{
provider = LocationManager.NETWORK_PROVIDER;
}
else
{
Toast.makeText(MainActivity.this, "here are no useful location service", 1000).show();
return;
}
Location location = locationManager.getLastKnownLocation(provider);
if(location!=null)
{
Log.i(">>>>>>>MainActivity", "显示位置信息，信息呢？");
showLocation(location);
}
else
{
Log.i(">>>>>>>MainActivity", "信息显示为空。。。。。。");
}
locationManager.requestLocationUpdates(provider, 5000, 1, listener);
}
private void showLocation(Location location) {
String position = "latitude is " + location.getLatitude() + "\n"
+ "longitude is " + location.getLongitude();
location_msg.setText("HELLO WORLD");
location_msg.setTextColor(Color.BLUE);
//Log.i(">>>>>>>MainActivity", "显示位置信息，信息呢？");
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
if(locationManager!=null)
{
locationManager.removeUpdates(listener);
}
}
LocationListener listener = new LocationListener() {
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onLocationChanged(Location location) {
showLocation(location);
}
};
}
布局文件为:一个TextView显示地理位置:经度和纬度
AndroidManifest.xml文件添加访问位置权限：
