Android™ Application Development - Bahar Ali Khan

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Chapter 7: Maps, Geocoding, and Location-Based Services 236 Point point = new Point(); projection.toPixels(geoPoint, point); RectF oval = new RectF(point.x - mRadius, point.y - mRadius, point.x + mRadius, point.y + mRadius); // Setup the paint Paint paint = new Paint(); paint.setARGB(250, 255, 0, 0); paint.setAnti<strong>Ali</strong>as(true); paint.setFakeBoldText(true); Paint backPaint = new Paint(); backPaint.setARGB(175, 50, 50, 50); backPaint.setAnti<strong>Ali</strong>as(true); RectF backRect = new RectF(point.x + 2 + mRadius, point.y - 3*mRadius, point.x + 65, point.y + mRadius); // Draw the marker canvas.drawOval(oval, paint); canvas.drawRoundRect(backRect, 5, 5, backPaint); canvas.drawText(“Here I Am”, point.x + 2*mRadius, point.y, paint); } super.draw(canvas, mapView, shadow); } 4. Now open the WhereAmI Activity class, and add the MyPositionOverlay to the MapView. Start by adding a new instance variable to store the MyPositionOverlay, then override onCreate to create a new instance of the class, and add it to the MapView’s Overlay list. MyPositionOverlay positionOverlay; @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); MapView myMapView = (MapView)fi ndViewById(R.id.myMapView); mapController = myMapView.getController(); myMapView.setSatellite(true); myMapView.setStreetView(true); myMapView.displayZoomControls(false); mapController.setZoom(17); // Add the MyPositionOverlay positionOverlay = new MyPositionOverlay(); List overlays = myMapView.getOverlays();
} Chapter 7: Maps, Geocoding, and Location-Based Services overlays.add(positionOverlay); LocationManager locationManager; String context = Context.LOCATION_SERVICE; locationManager = (LocationManager)getSystemService(context); Criteria criteria = new Criteria(); criteria.setAccuracy(Criteria.ACCURACY_FINE); criteria.setAltitudeRequired(false); criteria.setBearingRequired(false); criteria.setCostAllowed(true); criteria.setPowerRequirement(Criteria.POWER_LOW); String provider = locationManager.getBestProvider(criteria, true); Location location = locationManager.getLastKnownLocation(provider); updateWithNewLocation(location); locationManager.requestLocationUpdates(provider, 2000, 10, locationListener); 5. Finally, update the updateWithNewLocation method to pass the new location to the overlay. private void updateWithNewLocation(Location location) { String latLongString; TextView myLocationText; myLocationText = (TextView)fi ndViewById(R.id.myLocationText); String addressString = “No address found”; if (location != null) { // Update my location marker positionOverlay.setLocation(location); // Update the map location. Double geoLat = location.getLatitude()*1E6; Double geoLng = location.getLongitude()*1E6; GeoPoint point = new GeoPoint(geoLat.intValue(), geoLng.intValue()); mapController.animateTo(point); double lat = location.getLatitude(); double lng = location.getLongitude(); latLongString = “Lat:” + lat + “\nLong:” + lng; double latitude = location.getLatitude(); double longitude = location.getLongitude(); Geocoder gc = new Geocoder(this, Locale.getDefault()); try { List addresses = gc.getFromLocation(latitude, longitude, 1); StringBuilder sb = new StringBuilder(); 237
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Professional Android Application su
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Professional Android Application D
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Professional Android Application D
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About the Author Originally from Pe
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Acknowledgments A big thank you goe
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Contents Chapter 2: Getting Started
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Contents xii Saving and Loading Fil
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Contents Chapter 10: Accessing Andr
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Introduction Now is an exciting tim
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Introduction covered, you can move
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Introduction At http://p2p.wrox.com
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Chapter 1: Hello, Android 2 Using t
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Chapter 1: Hello, Android An Open P
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Chapter 1: Hello, Android 6 ❑ ❑
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Chapter 1: Hello, Android 8 When ma
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Chapter 1: Hello, Android 10 In mar
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Chapter 1: Hello, Android 12 Each A
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Chapter 1: Hello, Android 14 ❑ Da
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Chapter 1: Hello, Android 16 ❑ an
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Getting Started All you need to sta
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Chapter 2: Getting Started Unless o
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Installing the ADT Plug-in Install
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Chapter 2: Getting Started 3. In th
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Chapter 2: Getting Started If every
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} lp = new LinearLayout.LayoutParam
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❑ ❑ ❑ ❑ ❑ Small screens w
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Chapter 2: Getting Started on how t
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Chapter 2: Getting Started To start
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Ensuring a Seamless User Experience
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Figure 2-11 Chapter 2: Getting Star
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} myListView.setAdapter(aa); Chapte
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Chapter 2: Getting Started A number
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Creating Applications and Activitie
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Chapter 3: Creating Applications an
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Creating Resources Chapter 3: Creat
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❑ ❑ #ARGB #ARRGGBB Chapter 3: C
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android:startOffset=”500” andro
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Referencing Resources in Resources
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} } Chapter 3: Creating Application
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Chapter 4: Creating User Interfaces
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Chapter 5: Intents, Broadcast Recei
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Data Storage, Retrieval, and Sharin
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Chapter 6: Data Storage, Retrieval,
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} Chapter 6: Data Storage, Retrieva
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} Chapter 6: Data Storage, Retrieva
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} } } Chapter 6: Data Storage, Retr
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Querying Your Database Chapter 6: D
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Chapter 9: Peer-to-Peer Communicati
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} Chapter 9: Peer-to-Peer Communica
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Figure 9-4 Chapter 9: Peer-to-Peer
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Accessing Android Hardware Android
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Chapter 10: Accessing Android Hardw
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content.put(Audio.AudioColumns.DATE
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public void onShutter() { // TODO D
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public void setPitch(float pitch) {
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} setContentView(R.layout.main); Ch
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Chapter 11: Advanced Android Develo
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400 Android, getting started Androi
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402 databases databases creating ea
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404 interapplication communication
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406 passing custom class objects pa
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408 synchronizing threads synchroni
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Programmer to Programmer Get more
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Android™ Application Development - Bahar Ali Khan

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