Location and Sensors

Transcription

1 Location and Sensors

2 Masumi Nakamura

3 Location Manifest android.permission.access_coarse_location android.permission.access_fine_location Package android.location.* LOCATION_SERVICE (LocationManager) context.getsystemservice(context.location_service);

4 LocationManager LocationListener LocationListener Interface onlocationchanged(location location);

5 LocationManager - Usage requestlocationupdates (criteria, time, dist, listener) Criteria LocationManager.GPS_PROVIDER LocationManager.NETWORK_PROVIDER LocationManager.PASSIVE_PROVIDER removeupdates(listener); getlastknownlocation(provider)

6 Tips cation.html (Reto Meier) getlastknownlocation() Coarse to Fine Intent usage (PendingIntent) to get latest update Passive Location Provider Prefetch Monitor Battery (Be Smart)

7 Location Lat / Lon Location.distanceBetween / distanceto GeoCoder getfromlocation getfromlocationname

8 Google Maps Android API Google Play Services API isgoogleplayservicesavailable() Manifest <uses-library android:name="com.google.android.maps" /> Package com.google.android.maps.* MapActivity / MapView MyLocationOverlay

9 MapActivity / MapView 1

10 MapActivity / MapView 2

11 MapActivity / MapView 3 MyLocationOverlay

12 OverlaySample

13 Sensors TYPE_ALL TYPE_ACCELEROMETER TYPE_GYROSCOPE TYPE_GRAVITY TYPE_ROTATION_VECTOR TYPE_LINEAR_ACCELERATION TYPE_MAGNETIC_FIELD TYPE_LIGHT TYPE_PROXIMITY TYPE_RELATIVE_HUMIDITY TYPE_AMBIENT_TEMPERATURE

14 Sensors - SensorListener SensorListener onaccuracychanged() onsensorchanged() registerlistener(listener, sensor, delay) SENSOR_DELAY_NORMAL SENSOR_DELAY_UI SENSOR_DELAY_GAME SENSOR_DELAY_FASTEST unregisterlistener

15 Sensors Orientation Events SensorEvent float[] values timestamp

16 NFC

17 NFC Near Field Communication (NFC) Short-range (up to 20 cm) (spec) 3 Modes: Card Emulation (readable) Reader Mode (reading) P2P Mode (data exchange)

18 NdefMessage (NDEF Message) NDEF - NFC Data Exchange Format 1 NDEF Message per NFC Scan Contains 1 or more NDEF Records android.nfc.ndefmessage Is a Parcelable (Intent passable)

19 NdefRecord (NDEF Record) android.nfc.ndefrecord May contain mutable fields Structure: 3-bit TNF (Type Name Format) Variable length type (when TNF_WELL_KNOWN) Variable length ID (optional ID) Variable length payload

20

21 Manifest <uses-permission android:name="android.permission.nfc"/> <uses-feature android:name="android.hardware.nfc" android:required="true" /> <uses-sdk android:minsdkversion="10"/> SDK 9 (2.3) ACTION_TAG_DISCOVERED only SDK 10 (2.3.3) Writing capability enabled SDK 14 (4.0) - Beam

22

23 NfcAdapter NfcAdapter adapter = NfcAdapter.getDefaultAdapter(context); if(adapter!=null) { } // true if enabled, false if not boolean enabled=adapter.isenabled();

24 enableforegrounddispatch

25 ACTION_NDEF_DISCOVERED

26 TECH_DISCOVERED

27 ACTION_TAG_DISCOVERED

28 Reading the Tag byte[] id=intent.getbytearrayextra(nfcadapter.extra_id); Tag tag = (Tag)intent.getParcelableExtra(NfcAdapter.EXTRA_TAG); // API 10+ Parcelable[] msgs= intent.getparcelablearrayextra(nfcadapter.extra_ndef_messa GES); // msgs are NdefMessage so recast is needed

29 NdefRecord.RTD_TEXT

30 NdefRecord.RTD_URI First Byte defines prefix of URI

31 Sample TextRecord

32 Writing to Tag TagTechnology Ndef ndefref = Ndef.get((Tag)intent.getParcelableExtra(NfcAdapter.EXTRA_TAG)); ndefref.writendefmessage(msgtowrite); connect() must be called before I/O operation. I/O operations may block so do not call in main app thread Only one TagTechnology can be connected at a time close() must be called after completing I/O

33 P2P Mode and Beam P2P mode API 10 (2.3.3) enableforegroundndefpush() enableforegrounddispatch() Beam API 14+ (4.0+) setndefpushmessage() // sync setndefpushmessagecallback() // async

34 P2P Mode

35 Beam