我使用android SDK开发了一个土地面积计算应用程序。在过去的四年中，它的表现非常出色。 GPS精度等级低于10m。但是今年（2018年1月或2月）该应用程序不再运行良好，GPS精度级别为10m或更高。我使用Samsung Tab。有什么问题吗？
这是点捕获代码：
private void setPoints() {
try {
if (isGPSEnabled() && isNetworkEnabled()) {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(context);
locationManager = (LocationManager) context
.getSystemService(LOCATION_SERVICE);
if (ActivityCompat.checkSelfPermission(this, ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
currentLocation = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
/*currentLocation = LocationServices.FusedLocationApi
.getLastLocation(locationClient);*/
double longitude = currentLocation.getLongitude();
double lattitude = currentLocation.getLatitude();
double altitude = currentLocation.getLongitude();
double accuracy = currentLocation.getAccuracy();
Log.d("Accuracy", "Accuracy " + accuracy + "longitude: " + longitude + "lattitude: " + lattitude);
alertDialog.setMessage(String.valueOf(longitude) + "..." + String.valueOf(lattitude));
if (longitude > 0 && lattitude > 0) {
if (accuracy <= KmlHome.ACCURACY_LEVEL) {
capturePointAlert(longitude, lattitude, altitude,
accuracy,
ElandConstant.ADD_POINT_SUCCESS_ASK_STR,
"Capture Point", "YES", R.drawable.ok);
} else {
displayAlert(ElandConstant.ACCURACY_LEVEL_STR + " ( "
+ accuracy + " m ) \n Try again.",
ElandConstant.ACCURACY_LEVEL_TITLE_STR, "OK",
R.drawable.warning);
}
} else {
displayAlert(ElandConstant.NO_GPS_SIGNAL_STR,
ElandConstant.GPS_TITLE_STR, "OK", R.drawable.wrong);
}
} else {
displayAlert(ElandConstant.NO_GPS_SIGNAL_STR,
ElandConstant.GPS_TITLE_STR, "OK", R.drawable.wrong);
}
} catch (Exception e) {
e.printStackTrace();
AlertDialog alertDialog = new AlertDialog.Builder(LocationMapper.this).create();
alertDialog.setTitle("Alert");
alertDialog.setMessage((CharSequence) e);
alertDialog.setButton(AlertDialog.BUTTON_NEUTRAL, "OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alertDialog.show();
}
}