Wi-Fiベース屋内測位技術をAndroidアプリに組み込むには：Androidで使えるO2O技術まとめ解説（2）（4/4 ページ）

<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
<uses-permission android:name="android.permission.UPDATE_DEVICE_STATS"></uses-permission>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>

public class LocationDetectService extends Service implements RecommendationRequestListener{
  
/* WalkbaseのAPIキー */
private static final String WALKBASE_API_KEY = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
  
/* 位置問い合わせの間隔 */
private static final int FIVE_MINUTES = 300000;
private static final String TAG = "PecorinerLocationDetect";
private String FACEBOOK_ID = "";
private String PECORIN_TOKEN = "";
  
private ThreadGroup svrThreads = new ThreadGroup("ServiceWorker");
  
/* Walkbaseの位置情報サービスを利用するためのクラス */
private Positioning mPositioning;
  
/* 位置特定時の通知ハンドラ */
private Handler mDetectHandler;
  
private static final int DETECT = 1;
private static final int DETECT_ERR = 2;
  
private boolean continueScanning;
  
public void onCreate() {
    super.onCreate();
    this.continueScanning = true;
    mDetectHandler = new DetectHandler();
  
    mPositioning = new Positioning(this, WALKBASE_API_KEY);
  
    SharedPreferences preferences = getSharedPreferences("preference", Activity.MODE_PRIVATE);
    FACEBOOK_ID = preferences.getString("facebook_id", "");
    PECORIN_TOKEN = preferences.getString("pecorin_token", "");
}

public int onStartCommand(Intent intent, int flags, int startId) {
    super.onStartCommand(intent, flags, startId);
    new Thread(svrThreads, new ServiceWorker(), "PecorinerLocationDetect").start();
    return START_STICKY; 
}
 
class ServiceWorker implements Runnable {
    public void run() {
        continueScanning = true;
        try { 
            while(continueScanning) {
                mPositioning.fetchRecommendations(LocationDetectService.this, new String[]{"244a80bc944707c20d3df1ed1fbd416211baae32"});
                Thread.sleep(FIVE_MINUTES);
            }
        } catch(Exception e) {
            Log.v("LocationDetectService",e.getMessage());
        }
    }
}

@Override
public void didGetRecommendation(ArrayList<WalkbaseLocation> recommendations) {
    if(recommendations != null && recommendations.size() != 0) {
        WalkbaseLocation mostProbableLocation = (WalkbaseLocation)recommendations.get(0);
        sendResultMessage(DETECT, mostProbableLocation.locationId);
    } else {
        sendResultMessage(NO_DETECT, "");
    }
}
  
@Override
public void failedToGetRecommendation(int errCode, String errMessage) {
    sendResultMessage(DETECT_ERR, errMessage); 
}
  
private void sendResultMessage(int what, String sendingMessage) {
    Message message = Message.obtain(mDetectHandler, what);
    message.obj = sendingMessage;
    mDetectHandler.sendMessage(message);
}

private class DetectHandler extends Handler {
    @Override
    public void handleMessage(Message msg) {
        switch(msg.what) {
        case DETECT:
            if(msg.obj != null) {
                HttpPut method = new HttpPut(getString(R.string.PecorinServerURL)+"/user/"+FACEBOOK_ID+"/location");
                ArrayList<NameValuePair> params = new ArrayList<NameValuePair>();
                params.add(new BasicNameValuePair("current_location_id", msg.obj.toString()));
                params.add(new BasicNameValuePair("facebook_id", FACEBOOK_ID));
                params.add(new BasicNameValuePair("pecorin_token", PECORIN_TOKEN));
                try {
                    method.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));
                    DefaultHttpClient httpClient = new DefaultHttpClient();
                    HttpResponse res = httpClient.execute(method); 
  
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                    Log.i(TAG, "locationId:"+msg.obj.toString());
                    Log.i(TAG, "response:"+res.getEntity().toString());
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                    Log.e(TAG, e.getMessage());
                } catch (ClientProtocolException e) {
                    e.printStackTrace();
                    Log.e(TAG, e.getMessage());
                } catch (IOException e) {
                    e.printStackTrace();
                    Log.e(TAG, e.getMessage());
                }
            }
            break;
        case NO_DETECT:
            break;
        case DETECT_ERR:
            Toast.makeText(getApplicationContext(), "DETECT ERR:"+msg.obj.toString(),   Toast.LENGTH_SHORT).show();
            break;
        }
    }
}