Question

我想收到针对Driving Start和Stop的Android位置回拨。我已经尝试过Google的Activity Detection API，但它似乎不够可靠。除此之外，我已经研究过使用Neura的API来检测位置事件，但只有当设备在线时它才有效，这在我的情况下是不够的。

Answer 1

您可以使用Google的FenceApi声明驾驶围栏。

虽然这种做法看起来不错，但我已经面对这样一个事实，即当用户开始/完成驾驶时，这个api并没有告诉我，有时我开始驾驶这个api需要很长时间告诉我那件事。

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(), "Driving");
                    break;
                case FenceState.FALSE:
                    Log.i(fenceState.getFenceKey(), "Not driving");
                    break;
            }
        }
    }
}

如何以节能的方式接收Android的驾驶启动和停止活动，甚至可以脱机工作？

1 个答案: