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Improve GPS button response #661

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This commit is contained in:
Leith Bade
2014-11-30 21:05:12 +11:00
parent 634a15332d
commit e563f356a7
1 changed files with 53 additions and 24 deletions
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77
android/java/app/src/main/java/com/mapbox/mapboxgl/app/MainActivity.java
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@@ -1,5 +1,10 @@
package com.mapbox.mapboxgl.app;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
@@ -30,18 +35,26 @@ public class MainActivity extends ActionBarActivity {
// Tag used for logging
private static final String TAG = "MainActivity";
// Used for GPS
private static final String SINGLE_LOCATION_UPDATE_ACTION = "com.mapbox.mapboxgl.app.SINGLE_LOCATION_UPDATE_ACTION";
//
// Instance members
//
// Holds the MapFragment
MapFragment mMapFragment;
private MapFragment mMapFragment;
// The FPS label
TextView mFpsTextView;
private TextView mFpsTextView;
// The compass
ImageView mCompassView;
private ImageView mCompassView;
// Used for GPS
private LocationManager mLocationManager;
private PendingIntent mLocationPendingIntent;
private LocationReceiver mLocationReceiver;
//
// Lifecycle events
@@ -53,6 +66,10 @@ public class MainActivity extends ActionBarActivity {
super.onCreate(savedInstanceState);
Log.v(TAG, "onCreate");
Intent locationIntent = new Intent(SINGLE_LOCATION_UPDATE_ACTION);
mLocationManager = (LocationManager)getSystemService(getApplicationContext().LOCATION_SERVICE);
mLocationPendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, locationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
// Load the layout
setContentView(R.layout.activity_main);
mMapFragment = (MapFragment)getSupportFragmentManager().findFragmentById(R.id.fragment_map);
@@ -79,6 +96,21 @@ public class MainActivity extends ActionBarActivity {
styleSpinner.setOnItemSelectedListener(new StyleSpinnerListener());
}
// Called when our app goes into the background
@Override
public void onPause() {
super.onPause();
Log.v(TAG, "onPause");
// Cancel any outstanding GPS
if (mLocationReceiver != null) {
getApplicationContext().unregisterReceiver(mLocationReceiver);
mLocationReceiver = null;
}
mLocationManager.removeUpdates(mLocationPendingIntent);
}
//
// Other events
//
@@ -97,14 +129,18 @@ public class MainActivity extends ActionBarActivity {
switch (item.getItemId()) {
case R.id.action_gps:
// Get a GPS position
LocationManager locationManager = (LocationManager)getSystemService(getApplicationContext().LOCATION_SERVICE);
String provider = locationManager.getBestProvider(new Criteria(), true);
Location location = locationManager.getLastKnownLocation(provider);
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_LOW);
String provider = mLocationManager.getBestProvider(criteria, true);
Location location = mLocationManager.getLastKnownLocation(provider);
if (location != null) {
LonLatZoom coordinate = new LonLatZoom(location.getLongitude(), location.getLatitude(), 15);
mMapFragment.getMap().setCenterCoordinate(coordinate, true);
}
locationManager.requestSingleUpdate(provider, new MyLocationListener(), null);
IntentFilter locationIntentFilter = new IntentFilter(SINGLE_LOCATION_UPDATE_ACTION);
mLocationReceiver = new LocationReceiver();
getApplicationContext().registerReceiver(mLocationReceiver, locationIntentFilter);
mLocationManager.requestSingleUpdate(provider, mLocationPendingIntent);
return true;
case R.id.action_debug:
@@ -126,27 +162,20 @@ public class MainActivity extends ActionBarActivity {
}
// This class handles location events
private class MyLocationListener implements LocationListener {
private class LocationReceiver extends BroadcastReceiver {
@Override
public void onLocationChanged(Location location) {
LonLatZoom coordinate = new LonLatZoom(location.getLongitude(), location.getLatitude(), 15);
mMapFragment.getMap().setCenterCoordinate(coordinate, true);
}
public void onReceive(Context context, Intent intent) {
context.unregisterReceiver(this);
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// Do nothing
}
Location location = (Location)intent.getExtras().get(LocationManager.KEY_LOCATION_CHANGED);
if (location != null) {
LonLatZoom coordinate = new LonLatZoom(location.getLongitude(), location.getLatitude(), 15);
mMapFragment.getMap().setCenterCoordinate(coordinate, true);
}
@Override
public void onProviderEnabled(String provider) {
// Do nothing
}
@Override
public void onProviderDisabled(String provider) {
// Do nothing
mLocationManager.removeUpdates(mLocationPendingIntent);
mLocationReceiver = null;
}
}