Ich hatte einen Code, der die Aktivitätserkennungsaktualisierungen von Google verwendete. Jetzt scheinen diese plötzlich Updates zu senden, entweder mehrmals pro Sekunde oder nie, obwohl sie alle 20 Sekunden angefordert werden. Ich habe den Code nicht geändert und frühere Versionen überprüft, habe aber das gleiche Problem.

Ich habe ein minimales Beispiel aus dem Tutorial erstellt, erhalte aber auch keine Aktivitätsaktualisierungen mit meinem Nexus 5-Gerät. Mit meinem HTC Desire (MildWild 5.0 auf Basis von Android 2.3.7) funktioniert es einwandfrei. Ich habe vermutet, dass Google Play Services auf beiden Handys Version 4.2.43 installiert ist

Hauptaktivität:

package com.example.testactivities;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.Menu;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesClient.ConnectionCallbacks;
import com.google.android.gms.common.GooglePlayServicesClient.OnConnectionFailedListener;
import com.google.android.gms.location.ActivityRecognitionClient;

public class MainActivity extends FragmentActivity implements
ConnectionCallbacks, OnConnectionFailedListener {
    // Constants that define the activity detection interval
    public static final int MILLISECONDS_PER_SECOND = 1000;
    public static final int DETECTION_INTERVAL_SECONDS = 1;
    public static final int DETECTION_INTERVAL_MILLISECONDS = 
            MILLISECONDS_PER_SECOND * DETECTION_INTERVAL_SECONDS;
    /*
     * Store the PendingIntent used to send activity recognition events
     * back to the app
     */
    private PendingIntent mActivityRecognitionPendingIntent;
    // Store the current activity recognition client
    private ActivityRecognitionClient mActivityRecognitionClient;
    // Flag that indicates if a request is underway.
    private boolean mInProgress;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        /*
         * Instantiate a new activity recognition client. Since the
         * parent Activity implements the connection listener and
         * connection failure listener, the constructor uses "this"
         * to specify the values of those parameters.
         */
        mActivityRecognitionClient =
                new ActivityRecognitionClient(this, this, this);
        /*
         * Create the PendingIntent that Location Services uses
         * to send activity recognition updates back to this app.
         */
        Intent intent = new Intent(
                this.getApplicationContext(), ActivityRecognitionIntentService.class);
        /*
         * Return a PendingIntent that starts the IntentService.
         */
        mActivityRecognitionPendingIntent =
                PendingIntent.getService(this, 0, intent,
                PendingIntent.FLAG_UPDATE_CURRENT);
        // Start with the request flag set to false
        mInProgress = false;
        this.startUpdates();
    }

    /**
     * Request activity recognition updates based on the current
     * detection interval.
     *
     */
     public void startUpdates() {
        // If a request is not already underway
        if (!mInProgress) {
            // Indicate that a request is in progress
            mInProgress = true;
            // Request a connection to Location Services
            mActivityRecognitionClient.connect();
        //
        } else {
            /*
             * A request is already underway. You can handle
             * this situation by disconnecting the client,
             * re-setting the flag, and then re-trying the
             * request.
             */
        }
    }

     /*
      * Called by Location Services once the location client is connected.
      *
      * Continue by requesting activity updates.
      */
     @Override
     public void onConnected(Bundle dataBundle) {
         Log.v("EXAMPLE","connected");
         /*
          * Request activity recognition updates using the preset
          * detection interval and PendingIntent. This call is
          * synchronous.
          */
         mActivityRecognitionClient.requestActivityUpdates(
                 DETECTION_INTERVAL_MILLISECONDS,
                 mActivityRecognitionPendingIntent);
         /*
          * Since the preceding call is synchronous, turn off the
          * in progress flag and disconnect the client
          */
         mInProgress = false;
         mActivityRecognitionClient.disconnect();
     }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public void onConnectionFailed(ConnectionResult arg0) {
        Log.v("EXAMPLE","Connection failed");

    }

    @Override
    public void onDisconnected() {
        Log.v("EXAMPLE","Disconnected");
    }

}

Manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.testactivities"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="10"
        android:targetSdkVersion="19" />
    <uses-permission android:name="com.google.android.gms.permission.ACTIVITY_RECOGNITION"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />
        <activity
            android:name="com.example.testactivities.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <service
            android:name="com.example.testactivities.ActivityRecognitionIntentService"/>
    </application>

</manifest>

RecognitionIntentService:

package com.example.testactivities;

import android.app.IntentService;
import android.content.Intent;
import android.util.Log;

public class ActivityRecognitionIntentService extends IntentService {

    public ActivityRecognitionIntentService() {
        super("ActivityRecognitionIntent");
        Log.v("EXAMPLE","constructor");
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        Log.v("EXAMPLE","new activity update");
    }

}

UPDATE: Ich glaube, Canopi hat das richtige Problem identifiziert. Wenn das Gerät immer noch mit hoher Sicherheit arbeitet, werden keine Erkennungsabsichten ausgelöst. Dies war definitiv anders vor einem Jahr (auf anderen Geräten). Um festzustellen, ob das Gerät noch in Betrieb ist, protokolliere ich die zuletzt eingehende Aktivität mit ihrem Zeitstempel und überprüfe dies regelmäßig. Ein alter Zeitstempel zeigt an, dass das Gerät für diese Zeit noch in Betrieb war.