public class MainActivity extends Activity {
 private static final String TAG = MainActivity.class.getSimpleName();
 private double latitude = 0.0;
 private double longitude = 0.0;
 private TextView info;
 private LocationManager locationManager;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.main);
 info = (TextView) findViewById(R.id.tv);
 locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
 if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
 getLocation();
 //gps已打开
 } else {
 toggleGPS();
 new Handler() {
 }.postDelayed(new Runnable() {
 @Override
 public void run() {
  getLocation();
 }
 }, 2000);
 
 }
 }
 
 private void toggleGPS() {
 Intent gpsIntent = new Intent();
 gpsIntent.setClassName("com.android.settings", "com.android.settings.widget.SettingsAppWidgetProvider");
 gpsIntent.addCategory("android.intent.category.ALTERNATIVE");
 gpsIntent.setData(Uri.parse("custom:3"));
 try {
 PendingIntent.getBroadcast(this, 0, gpsIntent, 0).send();
 } catch (CanceledException e) {
 e.printStackTrace();
 locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 0, locationListener);
 Location location1 = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
 if (location1 != null) {
 latitude = location1.getLatitude(); // 经度
 longitude = location1.getLongitude(); // 纬度
 }
 }
 }
 
 private void getLocation() {
 Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
 if (location != null) {
 latitude = location.getLatitude();
 longitude = location.getLongitude();
 } else {
 
 locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 0, locationListener);
 }
 info.setText("纬度：" + latitude + "\n" + "经度：" + longitude);
 }
 
 LocationListener locationListener = new LocationListener() {
 // Provider的状态在可用、暂时不可用和无服务三个状态直接切换时触发此函数
 @Override
 public void onStatusChanged(String provider, int status, Bundle extras) {
 }
 
 // Provider被enable时触发此函数，比如GPS被打开
 @Override
 public void onProviderEnabled(String provider) {
 Log.e(TAG, provider);
 }
 
 // Provider被disable时触发此函数，比如GPS被关闭
 @Override
 public void onProviderDisabled(String provider) {
 Log.e(TAG, provider);
 }
 
 // 当坐标改变时触发此函数，如果Provider传进相同的坐标，它就不会被触发
 @Override
 public void onLocationChanged(Location location) {
 if (location != null) {
 Log.e("Map", "Location changed : Lat: " + location.getLatitude() + " Lng: " + location.getLongitude());
 latitude = location.getLatitude(); // 经度
 longitude = location.getLongitude(); // 纬度
 }
 }
 };
 
 /*
 * 
 * 打开和关闭gps第二种方法
 * private void openGPSSettings() {
 //获取GPS现在的状态（打开或是关闭状态）
 boolean gpsEnabled = Settings.Secure.isLocationProviderEnabled(getContentResolver(), LocationManager.GPS_PROVIDER);
 if (gpsEnabled) {
 //关闭GPS
 Settings.Secure.setLocationProviderEnabled(getContentResolver(), LocationManager.GPS_PROVIDER, false);
 } else {
 //打开GPS 
 Settings.Secure.setLocationProviderEnabled(getContentResolver(), LocationManager.GPS_PROVIDER, true);
 }
 }*/
}

<?xml version="1.0" encoding="utf-8"?>