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Android UI(8)Building Apps with User Info&Location
1. Accessing Contacts Data
…snip…
2. Remembering Users
…snip...
3. Making Your App Location Aware
Download the sample code LocationAware.zip.
3.1 Using the Location Manager
Declare Proper Permissions in Android Manifest
<uses-permissionandroid:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permissionandroid:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
Get a Reference to LocationManager
// Get a reference to the LocationManager object.
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Pick a Location Provider
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);finalboolean gpsEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
3.2 Obtaining the Current Location
Set Up the Location Listener
private final LocationListener listener = new LocationListener() {
public void onLocationChanged(Location location) { updateUILocation(location);}public void onProviderDisabled(String provider) {}public void onProviderEnabled(String provider) {}public void onStatusChanged(String provider, int status, Bundle extras) {}
};
private Location requestUpdatesFromProvider(final String provider,final String errorResId) {
Location location = null;if (locationManager.isProviderEnabled(provider)) { locationManager.requestLocationUpdates(provider, TEN_SECONDS,TEN_METERS, listener); location = locationManager.getLastKnownLocation(provider);} else { Toast.makeText(this, errorResId, Toast.LENGTH_LONG).show();}return location;
}
gpsLocation = requestUpdatesFromProvider(LocationManager.GPS_PROVIDER,"GPS provider is not supported.");networkLocation = requestUpdatesFromProvider(LocationManager.NETWORK_PROVIDER,"Network provider is not supported.");
Handle Multiple Sources of Location Updates
…snip...
Terminate Location Updates
locationManager.removeUpdates(listener);
3.3 Displaying the Location Address
It is not working on my device. I do not know if it is working on other device.
geocoderAvailable = Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD && Geocoder.isPresent();
private class ReverseGeocodingTask extends AsyncTask<Location, Void, Void> {
Context context;public ReverseGeocodingTask(Context context) { super(); this.context = context;}protected Void doInBackground(Location... params) {Geocoder geocoder = new Geocoder(context, Locale.getDefault());Location loc = params[0];List<Address> addresses = null;try { addresses = geocoder.getFromLocation(loc.getLatitude(),loc.getLongitude(), 1);} catch (IOException e) { e.printStackTrace(); // Update address field with the exception. Message.obtain(handler, UPDATE_ADDRESS, e.toString()).sendToTarget();}if (addresses != null && addresses.size() > 0) { Address address = addresses.get(0); String addressText = String.format( "%s, %s, %s", address.getMaxAddressLineIndex() > 0 ? address.getAddressLine(0) : "", address.getLocality(), address.getCountryName());// Update address field on UI. Message.obtain(handler, UPDATE_ADDRESS, addressText).sendToTarget();}return null;}
}
Tips:
1. LocationManager addProximityAlert
LocationManager locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Intent intent = new Intent("com.sillycat.easyrestclientandroid");
PendingIntent proximityIntent = PendingIntent.getBroadcast(this, -1, intent,0);
locationManager.addProximityAlert(lat,lng,radius,expiration,proximityIntent);
public class ProximityIntentReceiver extends BroadcastReceiver{
public void onReceive(Context context, Intent intent){
String key = LocationManager.KEY_PROXIMITY_ENTERING;
boolean entering = intent.getBooleanExtra(key,false);
…snip...
}
}
IntentFilter filter = new IntentFilter("com.sillycat.easyrestclientandroid");
registerReceiver(new ProximityIntentReceiver(),fitler);
2. Android android.app.Service
http://developer.android.com/reference/android/app/Service.html
The lifecycle of Service will be onCreate(), onStart(), onDestroy()
During start ----- onCreate(), onStart(), if the second time to start this service, it will only call onStart()
During stop ----- onDestroy()
There is no UI for service, but it should be always running background.
There are 2 ways to start the Service, Context.startService(), Context.bindService().
Context.startService()
startService ---- onCreate() -----> onStart() Second Time, only onStart()
stopService ---- onDestroy()
If the system did not destroy the service and quit the application, the service will be running on the backend. After we start the service we can check how many services we have in the [Setting] --> [Applications] --> Running Services
Context.bindService()
bindService ---> onCreate() ---> onBind() Second Time, nothing
unbindService ----> onUnbind() ---> onDestory()
onStartCommand
this onStartCommand() will be called after we invoke startService(Intent)
References:
http://developer.android.com/training/building-userinfo.html
http://developer.android.com/training/id-auth/index.html
http://developer.android.com/training/basics/location/index.html
Google Sample
https://code.google.com/p/google-api-java-client/wiki/APIs
https://code.google.com/p/google-api-java-client/source/browse/tasks-android-sample/src/main/java/com/google/api/services/samples/tasks/android/TasksSample.java?repo=samples
https://developers.google.com/google-apps/tasks/oauth-and-tasks-on-android
Android Service
http://blog.sina.com.cn/s/blog_3fe961ae0100xhsl.html
http://blog.csdn.net/nkmnkm/article/details/7331297
1. Accessing Contacts Data
…snip…
2. Remembering Users
…snip...
3. Making Your App Location Aware
Download the sample code LocationAware.zip.
3.1 Using the Location Manager
Declare Proper Permissions in Android Manifest
<uses-permissionandroid:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permissionandroid:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
Get a Reference to LocationManager
// Get a reference to the LocationManager object.
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Pick a Location Provider
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);finalboolean gpsEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
3.2 Obtaining the Current Location
Set Up the Location Listener
private final LocationListener listener = new LocationListener() {
public void onLocationChanged(Location location) { updateUILocation(location);}public void onProviderDisabled(String provider) {}public void onProviderEnabled(String provider) {}public void onStatusChanged(String provider, int status, Bundle extras) {}
};
private Location requestUpdatesFromProvider(final String provider,final String errorResId) {
Location location = null;if (locationManager.isProviderEnabled(provider)) { locationManager.requestLocationUpdates(provider, TEN_SECONDS,TEN_METERS, listener); location = locationManager.getLastKnownLocation(provider);} else { Toast.makeText(this, errorResId, Toast.LENGTH_LONG).show();}return location;
}
gpsLocation = requestUpdatesFromProvider(LocationManager.GPS_PROVIDER,"GPS provider is not supported.");networkLocation = requestUpdatesFromProvider(LocationManager.NETWORK_PROVIDER,"Network provider is not supported.");
Handle Multiple Sources of Location Updates
…snip...
Terminate Location Updates
locationManager.removeUpdates(listener);
3.3 Displaying the Location Address
It is not working on my device. I do not know if it is working on other device.
geocoderAvailable = Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD && Geocoder.isPresent();
private class ReverseGeocodingTask extends AsyncTask<Location, Void, Void> {
Context context;public ReverseGeocodingTask(Context context) { super(); this.context = context;}protected Void doInBackground(Location... params) {Geocoder geocoder = new Geocoder(context, Locale.getDefault());Location loc = params[0];List<Address> addresses = null;try { addresses = geocoder.getFromLocation(loc.getLatitude(),loc.getLongitude(), 1);} catch (IOException e) { e.printStackTrace(); // Update address field with the exception. Message.obtain(handler, UPDATE_ADDRESS, e.toString()).sendToTarget();}if (addresses != null && addresses.size() > 0) { Address address = addresses.get(0); String addressText = String.format( "%s, %s, %s", address.getMaxAddressLineIndex() > 0 ? address.getAddressLine(0) : "", address.getLocality(), address.getCountryName());// Update address field on UI. Message.obtain(handler, UPDATE_ADDRESS, addressText).sendToTarget();}return null;}
}
Tips:
1. LocationManager addProximityAlert
LocationManager locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Intent intent = new Intent("com.sillycat.easyrestclientandroid");
PendingIntent proximityIntent = PendingIntent.getBroadcast(this, -1, intent,0);
locationManager.addProximityAlert(lat,lng,radius,expiration,proximityIntent);
public class ProximityIntentReceiver extends BroadcastReceiver{
public void onReceive(Context context, Intent intent){
String key = LocationManager.KEY_PROXIMITY_ENTERING;
boolean entering = intent.getBooleanExtra(key,false);
…snip...
}
}
IntentFilter filter = new IntentFilter("com.sillycat.easyrestclientandroid");
registerReceiver(new ProximityIntentReceiver(),fitler);
2. Android android.app.Service
http://developer.android.com/reference/android/app/Service.html
The lifecycle of Service will be onCreate(), onStart(), onDestroy()
During start ----- onCreate(), onStart(), if the second time to start this service, it will only call onStart()
During stop ----- onDestroy()
There is no UI for service, but it should be always running background.
There are 2 ways to start the Service, Context.startService(), Context.bindService().
Context.startService()
startService ---- onCreate() -----> onStart() Second Time, only onStart()
stopService ---- onDestroy()
If the system did not destroy the service and quit the application, the service will be running on the backend. After we start the service we can check how many services we have in the [Setting] --> [Applications] --> Running Services
Context.bindService()
bindService ---> onCreate() ---> onBind() Second Time, nothing
unbindService ----> onUnbind() ---> onDestory()
onStartCommand
this onStartCommand() will be called after we invoke startService(Intent)
References:
http://developer.android.com/training/building-userinfo.html
http://developer.android.com/training/id-auth/index.html
http://developer.android.com/training/basics/location/index.html
Google Sample
https://code.google.com/p/google-api-java-client/wiki/APIs
https://code.google.com/p/google-api-java-client/source/browse/tasks-android-sample/src/main/java/com/google/api/services/samples/tasks/android/TasksSample.java?repo=samples
https://developers.google.com/google-apps/tasks/oauth-and-tasks-on-android
Android Service
http://blog.sina.com.cn/s/blog_3fe961ae0100xhsl.html
http://blog.csdn.net/nkmnkm/article/details/7331297
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ionic UI(4)ionic2 framework - basic and components and native
2016-03-24 02:33 1255ionic UI(4)ionic2 framework - b ... -
ionic UI(3)TypeScript - handbook
2016-03-22 23:21 628ionic UI(3)TypeScript - handboo ... -
ionic UI(2)ionic2 framework - TypeScript - tutorial
2016-03-22 06:52 1648ionic UI(2)ionic2 framework - T ... -
Parse and Heroku Service(3)Parse Server and Parse Dashboard
2016-03-22 06:30 960Parse and Heroku Service(3)Pars ... -
Parse and Heroku Service(2)Mail Templates and Push Notification
2016-03-22 02:45 574Parse and Heroku Service(2)Mail ... -
ionic UI(1)Introduction
2016-03-19 03:18 713ionic UI(1)Introduction 1 Inst ... -
Parse and Heroku Service(1)Heroku Installation and Play
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Hybrid(5)Customize Meteor Directly Google Login
2015-09-01 02:33 907Hybrid(5)Customize Meteor Direc ... -
Hybrid(4)Favorite Places - Google Login
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Hybrid(3)More Meteor Example - Social
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Hybrid(2)meteor Running Android and iOS
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Create the Google Play Account
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Secure REST API and Mobile(1)Document Read and Understand OAUTH2
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Screen Size and Web Design
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Android Fire Project(1)Recall Env and Knowledge
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Feel Android Studio(1)Install and Update Android Studio
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IOS7 App Development Essentials(2)iBeacon
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IOS7 App Development Essentials(1) Persistent Store
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