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- package com.tiesna.lokasi;
- import android.app.Activity;
- import android.content.Intent;
- import android.location.Location;
- import android.os.Bundle;
- import android.util.Log;
- import android.view.View;
- import android.widget.Button;
- import android.widget.TextView;
- import android.widget.Toast;
- import com.google.android.gms.common.ConnectionResult;
- import com.google.android.gms.common.GooglePlayServicesUtil;
- import com.google.android.gms.common.api.GoogleApiClient;
- import com.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacks;
- import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener;
- import com.google.android.gms.location.LocationListener;
- import com.google.android.gms.location.LocationRequest;
- import com.google.android.gms.location.LocationServices;
- public class LokasiActivity extends Activity implements ConnectionCallbacks,
- OnConnectionFailedListener, LocationListener {
- // LogCat tag
- private static final String TAG = LokasiActivity.class.getSimpleName();
- private final static int PLAY_SERVICES_RESOLUTION_REQUEST = 1000;
- private Location mLastLocation;
- // Google client to interact with Google API
- private GoogleApiClient mGoogleApiClient;
- // boolean flag to toggle periodic location updates
- private boolean mRequestingLocationUpdates = false;
- private LocationRequest mLocationRequest;
- // Location updates intervals in sec
- private static int UPDATE_INTERVAL = 10000; // 10 sec
- private static int FATEST_INTERVAL = 5000; // 5 sec
- private static int DISPLACEMENT = 10; // 10 meters
- // UI elements
- private TextView lblLocation;
- private Button btnShowLocation, btnStartLocationUpdates;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_lokasi);
- lblLocation = (TextView) findViewById(R.id.lblLocation);
- btnShowLocation = (Button) findViewById(R.id.btnShowLocation);
- btnStartLocationUpdates = (Button) findViewById(R.id.btnLocationUpdates);
- // First we need to check availability of play services
- if (checkPlayServices()) {
- // Building the GoogleApi client
- buildGoogleApiClient();
- createLocationRequest();
- }
- // Show location button click listener
- btnShowLocation.setOnClickListener(new View.OnClickListener() {
- @Override
- public void onClick(View v) {
- startActivity(new Intent(LokasiActivity.this, MapsActivity.class));
- finish();
- displayLocation();
- }
- });
- // Toggling the periodic location updates
- btnStartLocationUpdates.setOnClickListener(new View.OnClickListener() {
- @Override
- public void onClick(View v) {
- togglePeriodicLocationUpdates();
- }
- });
- }
- @Override
- protected void onStart() {
- super.onStart();
- if (mGoogleApiClient != null) {
- mGoogleApiClient.connect();
- }
- }
- @Override
- protected void onResume() {
- super.onResume();
- checkPlayServices();
- // Resuming the periodic location updates
- if (mGoogleApiClient.isConnected() && mRequestingLocationUpdates) {
- startLocationUpdates();
- }
- }
- @Override
- protected void onStop() {
- super.onStop();
- if (mGoogleApiClient.isConnected()) {
- mGoogleApiClient.disconnect();
- }
- }
- @Override
- protected void onPause() {
- super.onPause();
- stopLocationUpdates();
- }
- /**
- * Method to display the location on UI
- * */
- public void displayLocation() {
- mLastLocation = LocationServices.FusedLocationApi
- .getLastLocation(mGoogleApiClient);
- if (mLastLocation != null) {
- double latitude = mLastLocation.getLatitude();
- double longitude = mLastLocation.getLongitude();
- lblLocation.setText(latitude + ", " + longitude);
- } else {
- lblLocation.setText("(Couldn't get the location. Make sure location is enabled on the device)");
- }
- }
- /**
- * Method to toggle periodic location updates
- * */
- private void togglePeriodicLocationUpdates() {
- if (!mRequestingLocationUpdates) {
- // Changing the button text
- btnStartLocationUpdates
- .setText(getString(R.string.btn_stop_location_updates));
- mRequestingLocationUpdates = true;
- // Starting the location updates
- startLocationUpdates();
- Log.d(TAG, "Periodic location updates started!");
- } else {
- // Changing the button text
- btnStartLocationUpdates
- .setText(getString(R.string.btn_start_location_updates));
- mRequestingLocationUpdates = false;
- // Stopping the location updates
- stopLocationUpdates();
- Log.d(TAG, "Periodic location updates stopped!");
- }
- }
- /**
- * Creating google api client object
- * */
- protected synchronized void buildGoogleApiClient() {
- mGoogleApiClient = new GoogleApiClient.Builder(this)
- .addConnectionCallbacks(this)
- .addOnConnectionFailedListener(this)
- .addApi(LocationServices.API).build();
- }
- /**
- * Creating location request object
- * */
- protected void createLocationRequest() {
- mLocationRequest = new LocationRequest();
- mLocationRequest.setInterval(UPDATE_INTERVAL);
- mLocationRequest.setFastestInterval(FATEST_INTERVAL);
- mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
- mLocationRequest.setSmallestDisplacement(DISPLACEMENT);
- }
- /**
- * Method to verify google play services on the device
- * */
- private boolean checkPlayServices() {
- int resultCode = GooglePlayServicesUtil
- .isGooglePlayServicesAvailable(this);
- if (resultCode != ConnectionResult.SUCCESS) {
- if (GooglePlayServicesUtil.isUserRecoverableError(resultCode)) {
- GooglePlayServicesUtil.getErrorDialog(resultCode, this,
- PLAY_SERVICES_RESOLUTION_REQUEST).show();
- } else {
- Toast.makeText(getApplicationContext(),
- "This device is not supported.", Toast.LENGTH_LONG)
- .show();
- finish();
- }
- return false;
- }
- return true;
- }
- /**
- * Starting the location updates
- * */
- protected void startLocationUpdates() {
- LocationServices.FusedLocationApi.requestLocationUpdates(
- mGoogleApiClient, mLocationRequest, this);
- }
- /**
- * Stop lokasi updates
- */
- protected void stopLocationUpdates() {
- LocationServices.FusedLocationApi.removeLocationUpdates(
- mGoogleApiClient, this);
- }
- /**
- * Google api callback methods
- */
- @Override
- public void onConnectionFailed(ConnectionResult result) {
- Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = "
- + result.getErrorCode());
- }
- @Override
- public void onConnected(Bundle arg0) {
- // Once connected with google api, get the location
- displayLocation();
- if (mRequestingLocationUpdates) {
- startLocationUpdates();
- }
- }
- @Override
- public void onConnectionSuspended(int arg0) {
- mGoogleApiClient.connect();
- }
- @Override
- public void onLocationChanged(Location location) {
- // Assign the new location
- mLastLocation = location;
- Toast.makeText(getApplicationContext(), "Location changed!",
- Toast.LENGTH_SHORT).show();
- // Displaying the new location on UI
- displayLocation();
- }
- }
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