Detect user activity (running, cycling, driving) using Android

问题

Using my Android device how can I detect if the user is walking, cycling or driving? I have checked the Google Fit app. It differentiates between running, cycling and driving. I am puzzled about what algorithms I should use to differentiate between these activities.

I know I would have to use the accelerometer sensor. But still I can't differentiate these activities.

回答1:

You can use the GooglePlayServices for this.

It Provides special apis for ActivityRecognition, which returns the User activity with confidence level for each.

https://developer.android.com/reference/com/google/android/gms/location/ActivityRecognitionClient.html

http://developer.android.com/training/location/activity-recognition.html

回答2:

This question is quite old, but since there are new technologies out there, i thought it was worth mentioning, if anyone is still encountering this issue.

I can come up with 3 options :

You can implement your own technique for detecting walking, driving, cycling - using Activity recognition and receiving location updates, though i recommend not to do so, don't reinvent the wheel, there are good apis developed already, it's 2016 now.
You could use a free sdk of Neura which can send you an event when your user starts/finishes driving, start/finish walking, start/finish running, read more of the events you can get from Neura.

Check out this git project : Basically, the project has all the events that Nuera can detect. Its very easy to just take this project and make it your own.

I highly recommend using this Neura sdk option.

You could use google's FenceApi in order to declare fences. For example, this is a code for detecting a driving fence.

Though this approach seems good, i've faced with the fact that this api didn't tell me sometimes when the events happened, and sometimes it took a long time after i started walking/running when the api told me of that event.

a. include dependency to your app's build.gradle file :

   compile 'com.google.android.gms:play-services-location:+'

   compile 'com.google.android.gms:play-services-contextmanager:+'

b. Manifest definitions :

<uses-permission android:name="com.google.android.gms.permission.ACTIVITY_RECOGNITION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme" >

    <meta-data
        android:name="com.google.android.awareness.API_KEY"
        android:value="PUT_YOUR_AWARENESS_KEY_HERE" />

    <activity android:name=".MainActivity" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

PUT_YOUR_AWARENESS_KEY_HERE : You need to generate a key here.

c. Your MainActivity class - explanations attached to the code :

public class MainActivity extends Activity {

    private GoogleApiClient mGoogleApiClient;
    private PendingIntent mPendingIntent;
    private FenceReceiver mFenceReceiver;

    // The intent action which will be fired when your fence is triggered.
    private final String FENCE_RECEIVER_ACTION = BuildConfig.APPLICATION_ID + "FENCE_RECEIVER_ACTION";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mGoogleApiClient = new GoogleApiClient.Builder(this).addApi(Awareness.API).build();
        mGoogleApiClient.connect();
        // Set up the PendingIntent that will be fired when the fence is triggered.
        mPendingIntent = PendingIntent.getBroadcast(this, 0, new Intent(FENCE_RECEIVER_ACTION), 0);
        // The broadcast receiver that will receive intents when a fence is triggered.
        mFenceReceiver = new FenceReceiver();
        registerReceiver(mFenceReceiver, new IntentFilter(FENCE_RECEIVER_ACTION));
        createFence(DetectedActivityFence.IN_VEHICLE, "InVehicleFence");
    }

    @Override
    public void onDestroy() {
        try {
            unregisterReceiver(mFenceReceiver); //Don't forget to unregister the receiver
        } catch (Exception e) {
            e.printStackTrace();
        }
        super.onDestroy();
    }

    private void createFence(int detectedActivityFence, final String fenceKey) {
        AwarenessFence fence = DetectedActivityFence.during(detectedActivityFence);
        // Register the fence to receive callbacks.
        Awareness.FenceApi.updateFences(
                mGoogleApiClient, new FenceUpdateRequest.Builder().addFence(fenceKey, fence, mPendingIntent)
                        .build()).setResultCallback(new ResultCallback<Status>() {
            @Override
            public void onResult(@NonNull Status status) {
                if (status.isSuccess()) {
                    Log.i(getClass().getSimpleName(), "Successfully registered.");
                } else {
                    Log.e(getClass().getSimpleName(), "Could not be registered: " + status);
                }
            }
        });
    }

    // Handle the callback on the Intent.
    public class FenceReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            FenceState fenceState = FenceState.extract(intent);
            switch (fenceState.getCurrentState()) {
                case FenceState.TRUE:
                    Log.i(fenceState.getFenceKey(), "Active");
                    break;
                case FenceState.FALSE:
                    Log.i(fenceState.getFenceKey(), "Not Active");
                    break;
            }
        }
    }
}

This sample is only for detecting driving state, but, you can call 'createFence' with other activity methods such as :

createFence(DetectedActivityFence.TILTING, "TiltingFence");
createFence(DetectedActivityFence.WALKING, "WalkingFence");
createFence(DetectedActivityFence.ON_FOOT, "OnFootFence");
createFence(DetectedActivityFence.RUNNING, "RunningFence");