NMEA資訊

NMEA資訊
    // get location service
    LocationManager location = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
    // set location update settings(time...)
     location.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,new LocationListener(){
        public void onLocationChanged(Location loc) {}
        public void onProviderDisabled(String provider) {}
        public void onProviderEnabled(String provider) {}
        public void onStatusChanged(String provider, int status,Bundle extras) {}
    });
    // listen the NMEA information when change
    location.addNmeaListener(new NmeaListener() {
        public void onNmeaReceived(long timestamp, String nmea) {
            msg.append(nmea);
        }
    });

DisplayResolution資訊

DisplayResolution資訊
透過DisplayMetrics物件，可以抓取目前顯示面板的相關資訊

    public class displayresolution extends Activity {
        public void onCreate(Bundle savedInstanceState) {
            ..........
            DisplayMetrics dm = new DisplayMetrics();
            getWindowManager().getDefaultDisplay().getMetrics(dm);
            textScreen.setText(
                "Screen Width: " + String.valueOf(dm.widthPixels) + "\n" +
                "Screen Height: " + String.valueOf(dm.heightPixels) + "\n" +
                "Density: " + String.valueOf(dm.density) + "\n" +
                "DensityDPI: " + String.valueOf(dm.densityDpi) + "\n" +
                "Scaled Density: " + String.valueOf(dm.scaledDensity) + "\n" +
                "X DPI: " + String.valueOf(dm.xdpi) + "\n" +
                "Y DPI: " + String.valueOf(dm.ydpi) + "\n");
        }
    }

Battery資訊

Battery資訊
利用BroadcastReceiver及IntentFilter物件偵測Battery資訊
    public void onCreate() {
        .......
        IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_BATTERY_CHANGED);
        registerReceiver(mBroadcastReceiver, filter);
    }

    public void onDestroy() {
        .............
        unregisterReceiver(mBroadcastReceiver);
    }

    private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (action.equals(Intent.ACTION_BATTERY_CHANGED)) {
                // status
                switch (intent.getIntExtra("status", 0)) {
                case BatteryManager.BATTERY_STATUS_UNKNOWN:
                    statusString = "unknown";
                    break; 
                case BatteryManager.BATTERY_STATUS_CHARGING:
                    statusString = "charging";
                    break; 
                case BatteryManager.BATTERY_STATUS_DISCHARGING:
                    statusString = "discharging";
                    break;
                case BatteryManager.BATTERY_STATUS_NOT_CHARGING:
                    statusString = "not charging";
                    break;
                case BatteryManager.BATTERY_STATUS_FULL:
                    statusString = "full";
                    break;
                default:
                    statusString = "unknown";
                    break;
                }
                // health
                switch (intent.getIntExtra("health", 0)) {
                case BatteryManager.BATTERY_HEALTH_UNKNOWN:
                    healthString = "unknown";
                    break;
                case BatteryManager.BATTERY_HEALTH_GOOD:
                    healthString = "good";
                    break;
                case BatteryManager.BATTERY_HEALTH_OVERHEAT:
                    healthString = "over heat";
                    break;
                case BatteryManager.BATTERY_HEALTH_DEAD:
                    healthString = "dead";
                    break;
                case BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE:
                    healthString = "over voltage";
                    break;
                case BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE:
                    healthString = "unspecified failure";
                    break;
                default:
                    healthString = "unknown";
                    break;
                }
                // plugged
                switch (intent.getIntExtra("plugged", 0)) {
                case BatteryManager.BATTERY_PLUGGED_AC:
                    acString = "plugged ac";
                    break;
                case BatteryManager.BATTERY_PLUGGED_USB:
                    acString = "plugged usb";
                    break;
                default :
                    acString = "disconnect";
                    break;
                }
                // others
                boolean present = intent.getBooleanExtra("present", false);
                int level = intent.getIntExtra("level", 0);
                int scale = intent.getIntExtra("scale", 0);
                int icon_small = intent.getIntExtra("icon-small", 0);
                int voltage = intent.getIntExtra("voltage", 0);
                int temperature = intent.getIntExtra("temperature", 0);
                String technology = intent.getStringExtra("technology");
            }
        }
    };

KeyEven接收

KeyEven接收
擷取按Key的動作

    public boolean dispatchKeyEvent(KeyEvent event) {
        switch (event.getKeyCode()){
        case KeyEvent.KEYCODE_MENU:
            break;
        case KeyEvent.KEYCODE_BACK:
            break;
        case KeyEvent.KEYCODE_VOLUME_UP:
            break;
        case KeyEvent.KEYCODE_VOLUME_DOWN:
            break;
        default:
            break;
        }
    }

// 目前"POWER"及"HOME"還不清楚要怎麼做
// Android OS限制?