package org.commcare.activities;
import android.Manifest;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.TextView;
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapView;
import com.google.android.gms.maps.MapsInitializer;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import org.commcare.activities.components.FormEntryConstants;
import org.commcare.dalvik.R;
import org.commcare.utils.GeoUtils;
import org.commcare.views.widgets.GeoPointWidget;
import java.text.DecimalFormat;
import java.util.List;
/**
* Allows location to be chosen using a map instead of current gps coordinates
*/
public class GeoPointMapActivity extends Activity
implements LocationListener, OnMapReadyCallback,
GoogleMap.OnMyLocationButtonClickListener {
private MapView mapView;
private GoogleMap map;
private Marker marker;
private TextView locationText;
private LocationManager locationManager;
private Location location = new Location("XForm");
private boolean inViewMode = false;
// don't reset marker to current GPS location if we manually selected a location
private boolean isManualSelectedLocation = false;
private boolean isGPSOn = false;
private boolean isNetworkOn = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.geopoint_layout);
loadViewModeState();
setupUI();
loadMapView(savedInstanceState);
loadProviders();
}
private void loadViewModeState() {
Intent intent = getIntent();
if (intent != null && intent.getExtras() != null) {
double[] location = intent.getDoubleArrayExtra(GeoPointWidget.LOCATION);
this.location.setLatitude(location[0]);
this.location.setLongitude(location[1]);
inViewMode = true;
}
}
private void setupUI() {
Button cancelButton = (Button)findViewById(R.id.cancel_location);
cancelButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
finish();
}
});
Button acceptButton = (Button)findViewById(R.id.accept_location);
acceptButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
returnLocation();
}
});
Button showLocationButton = ((Button)findViewById(R.id.show_location));
showLocationButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
animateToPoint(location.getLatitude(), location.getLongitude(), location.getAccuracy());
}
});
locationText = (TextView)findViewById(R.id.location_status);
if (inViewMode) {
acceptButton.setVisibility(View.GONE);
showLocationButton.setVisibility(View.VISIBLE);
findViewById(R.id.location_status).setVisibility(View.GONE);
}
}
private void returnLocation() {
if (location != null) {
Intent i = new Intent();
i.putExtra(FormEntryConstants.LOCATION_RESULT, GeoUtils.locationToString(location));
setResult(RESULT_OK, i);
}
finish();
}
private void loadMapView(Bundle savedInstanceState) {
mapView = (MapView)findViewById(R.id.mapview);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(this);
}
private void loadProviders() {
locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
List<String> providers = locationManager.getProviders(true);
for (String provider : providers) {
if (provider.equalsIgnoreCase(LocationManager.GPS_PROVIDER)) {
isGPSOn = true;
}
if (provider.equalsIgnoreCase(LocationManager.NETWORK_PROVIDER)) {
isNetworkOn = true;
}
}
}
@Override
public void onLocationChanged(Location location) {
if (!inViewMode && !isManualSelectedLocation) {
this.location = location;
if (this.location != null) {
drawMarker();
}
}
}
@Override
public void onMapReady(GoogleMap map) {
this.map = map;
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED ||
ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
map.getUiSettings().setMyLocationButtonEnabled(true);
map.setMyLocationEnabled(true);
map.setOnMyLocationButtonClickListener(this);
}
MapsInitializer.initialize(this);
if (inViewMode) {
drawMarker();
}
setupMapListeners();
}
private void setupMapListeners() {
if (!inViewMode) {
map.setOnMapClickListener(
new GoogleMap.OnMapClickListener() {
@Override
public void onMapClick(LatLng point) {
isManualSelectedLocation = true;
location.setLongitude(point.longitude);
location.setLatitude(point.latitude);
location.setAccuracy(10);
drawMarker();
}
}
);
}
}
private void drawMarker() {
locationText.setText(getString(R.string.location_provider_accuracy,
truncateFloat(location.getAccuracy())));
if (marker != null) {
marker.remove();
}
marker = map.addMarker(new MarkerOptions().position(new LatLng(location.getLatitude(), location.getLongitude())).title("Selected location"));
animateToPoint(location.getLatitude(), location.getLongitude(), location.getAccuracy());
}
private static String truncateFloat(float f) {
return new DecimalFormat("#.##").format(f);
}
private void animateToPoint(double lat, double lng, float accuracy) {
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int screenSize = Math.min(metrics.widthPixels, metrics.heightPixels);
int zoomLevel = calculateZoomLevel(screenSize, accuracy);
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(new LatLng(lat, lng), zoomLevel);
map.animateCamera(cameraUpdate);
}
// via http://stackoverflow.com/a/25143326
private static int calculateZoomLevel(int screenWidth, float accuracy) {
// don't zoom in too much
final int MAX_ZOOM_LEVEL = 16;
double equatorLength = 40075004; // in meters
double metersPerPixel = equatorLength / 256;
int zoomLevel = 1;
while ((metersPerPixel * (double)screenWidth) > accuracy && zoomLevel < MAX_ZOOM_LEVEL) {
metersPerPixel /= 2;
zoomLevel++;
}
return zoomLevel;
}
@Override
protected void onPause() {
super.onPause();
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED ||
ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
locationManager.removeUpdates(this);
}
}
@Override
protected void onResume() {
mapView.onResume();
super.onResume();
if (isGPSOn && ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
}
if (isNetworkOn && ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this);
}
// TODO PLM: warn user and ask for permissions if the user has disabled them
}
@Override
public void onDestroy() {
super.onDestroy();
mapView.onDestroy();
}
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public boolean onMyLocationButtonClick() {
isManualSelectedLocation = false;
return false;
}
}