android在後臺檢測ActivityRecognition

Question

我想在應用程序關閉時檢測用戶用戶在後臺的活動。有一個使用Google API for Android的ActivityRecognition的例子。 在示例中，識別是由一個活動啓動的，並且我使服務得以實現。 它可以在大多數設備上正常工作，但不能在使用api 4.2.x的設備上正常工作。

public class RecognitionService extends Service implements GoogleApiClient.ConnectionCallbacks, 
    GoogleApiClient.OnConnectionFailedListener, 
    ResultCallback<Status> { 
private static final String TAG = RecognitionService.class.getSimpleName(); 
public final static int DETECTION_INTERVAL_IN_MILLISECONDS = 60_000; 
private GoogleApiClient googleApiClient; 

public RecognitionService() { 
    super(); 
} 

@Override 
public int onStartCommand(Intent intent, int flags, int startId) { 
    initLocationClient(); 
    return START_STICKY; 
} 

@Override 
public IBinder onBind(Intent intent) { 
    return null; 
} 

private void initLocationClient() { 
    if (googleApiClient == null) { 
     googleApiClient = new GoogleApiClient 
       .Builder(this) 
       .addConnectionCallbacks(this) 
       .addOnConnectionFailedListener(this) 
       .addApi(ActivityRecognition.API) 
       .build(); 
    } 

    if (!googleApiClient.isConnected() || !googleApiClient.isConnecting()) { 
     googleApiClient.connect(); 
    } 
} 

@Override 
public void onConnected(Bundle bundle) { 
    Log.i(TAG, "Connected to GoogleApiClient"); 
    if (googleApiClient != null && googleApiClient.isConnected()) { 
     ActivityRecognition.ActivityRecognitionApi.requestActivityUpdates(
       googleApiClient, 
       DETECTION_INTERVAL_IN_MILLISECONDS, 
       getActivityDetectionPendingIntent() 
     ).setResultCallback(this); 
    } 
} 

@Override 
public void onConnectionSuspended(int i) { 
    Log.i(TAG, "Connection suspended"); 
    googleApiClient.connect(); 
} 

@Override 
public void onConnectionFailed(ConnectionResult connectionResult) { 
    Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = " + connectionResult.getErrorCode()); 
} 

private PendingIntent getActivityDetectionPendingIntent() { 
    Intent intent = new Intent(this, DetectedActivitiesIntentService.class); 

    // We use FLAG_UPDATE_CURRENT so that we get the same pending intent back when calling 
    // requestActivityUpdates() and removeActivityUpdates(). 
    return PendingIntent.getService(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT); 
} 

@Override 
public void onResult(Status status) { 
    Log.i(TAG, "onResult = " + status.getStatusMessage()); 
} 

@Override 
public void onDestroy() { 
    super.onDestroy(); 
    Log.i(TAG, "onDestroy"); 
    ActivityRecognition.ActivityRecognitionApi.removeActivityUpdates(
      googleApiClient, 
      getActivityDetectionPendingIntent() 
    ).setResultCallback(this); 
} 
} 

onConnected，onConnectionSuspended，onConnectionFailed方法不會被調用。

對這種情況你有什麼想法嗎？使用isGooglePlayServicesAvailable()安裝的設備具有GooglePlayServices的正確版本

Answer 1

確認：

GoogleApiAvailability apiAvail = GoogleApiAvailability.getInstance(); 
    int errorCode = apiAvail.isGooglePlayServicesAvailable(this); 

    if (errorCode == ConnectionResult.SUCCESS) { 
     // okay 
    } else { 
     // not available; start processing to resolve 
    } 

雖然播放服務的可用性應連接請求onConnectionFailed()後上報，使用isGooglePlayServicesAvailable()提供了另一種方式來查詢。

SO question這個地址支持ActivityRecognition的版本。