アクティビティの認識に問題があります。アプリに実装しましたが、デバイスの画面がオンのときに正常に動作します。アクティビティ認識インテント サービス クラスにログ エントリがあり、いつ更新されるかを確認できます。したがって、画面がオンのときに正常に動作していることがわかります。
しかし、電話がスタンバイになった後（画面がオフになる）、使用アクティビティの検出が停止します。
DetectionRequester クラスの onDisconnected() が呼び出されていません。ログ投稿を使用して確認しました。
私の質問: デバイスがスタンバイ モードになった後、アプリが使用アクティビティの追跡を停止するのはなぜですか? また、ユーザーのアクティビティの検出を停止しないようにするにはどうすればよいですか?
コードを確認する必要がある場合、またはアプリの詳細が必要な場合はお知らせください。
MainActivity クラスの関連コード。これは、アプリが ActivityRecognition の要求を開始する場所です。
public class MainActivity extends FragmentActivity {
// The activity recognition update request object
private DetectionRequester mDetectionRequester;
// The activity recognition update removal object
private DetectionRemover mDetectionRemover;
// Store the current request type (ADD or REMOVE)
private REQUEST_TYPE mRequestType;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Crashlytics.start(this);
setContentView(R.layout.activity_main);
mDetectionRequester = new DetectionRequester(this);
mDetectionRemover = new DetectionRemover(this);
// Check for Google Play services
if (servicesConnected())
{
/*
*Set the request type. If a connection error occurs, and Google Play services can
* handle it, then onActivityResult will use the request type to retry the request
*/
mRequestType = ActivityUtils.REQUEST_TYPE.ADD;
// Pass the update request to the requester object
mDetectionRequester.requestUpdates();
}
}
private boolean servicesConnected() {
Log.wtf("Rakshak", "Service connected method");
// Check that Google Play services is available
int resultCode =
GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
// If Google Play services is available
if (ConnectionResult.SUCCESS == resultCode)
{
Log.wtf("Rakshak", "Service connected method: connection result success");
// Continue
return true;
// Google Play services was not available for some reason
} else {
Log.wtf("Rakshak", "Service connected method: connection result failure");
// Display an error dialog
GooglePlayServicesUtil.getErrorDialog(resultCode, this, 0).show();
return false;
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
// Choose what to do based on the request code
switch (requestCode) {
// If the request code matches the code sent in onConnectionFailed
case ActivityUtils.CONNECTION_FAILURE_RESOLUTION_REQUEST :
switch (resultCode) {
// If Google Play services resolved the problem
case Activity.RESULT_OK:
// If the request was to start activity recognition updates
if (ActivityUtils.REQUEST_TYPE.ADD == mRequestType) {
// Restart the process of requesting activity recognition updates
mDetectionRequester.requestUpdates();
// If the request was to remove activity recognition updates
} else if (ActivityUtils.REQUEST_TYPE.REMOVE == mRequestType ){
/*
* Restart the removal of all activity recognition updates for the
* PendingIntent.
*/
// mDetectionRemover.removeUpdates(
// mDetectionRequester.getRequestPendingIntent());
}
break;
// If any other result was returned by Google Play services
default:
// Report that Google Play services was unable to resolve the problem.
Log.d(ActivityUtils.APPTAG, "unable to resolve Google play services problems");
}
// If any other request code was received
default:
// Report that this Activity received an unknown requestCode
Log.d(ActivityUtils.APPTAG,
"received an unknown request code");
break;
}
}
私の検出リクエスタークラス:
public class DetectionRequester
implements ConnectionCallbacks, OnConnectionFailedListener {
// Storage for a context from the calling client
private Context mContext;
// Stores the PendingIntent used to send activity recognition events back to the app
private PendingIntent mActivityRecognitionPendingIntent;
// Stores the current instantiation of the activity recognition client
private ActivityRecognitionClient mActivityRecognitionClient;
public DetectionRequester(Context context) {
// Save the context
mContext = context;
// Initialize the globals to null
mActivityRecognitionPendingIntent = null;
mActivityRecognitionClient = null;
}
/**
* Returns the current PendingIntent to the caller.
*
* @return The PendingIntent used to request activity recognition updates
*/
public PendingIntent getRequestPendingIntent() {
return mActivityRecognitionPendingIntent;
}
/**
* Sets the PendingIntent used to make activity recognition update requests
* @param intent The PendingIntent
*/
public void setRequestPendingIntent(PendingIntent intent) {
mActivityRecognitionPendingIntent = intent;
}
/**
* Start the activity recognition update request process by
* getting a connection.
*/
public void requestUpdates() {
requestConnection();
}
/**
* Make the actual update request. This is called from onConnected().
*/
private void continueRequestActivityUpdates() {
/*
* Request updates, using the default detection interval.
* The PendingIntent sends updates to ActivityRecognitionIntentService
*/
getActivityRecognitionClient().requestActivityUpdates(
ActivityUtils.DETECTION_INTERVAL_MILLISECONDS,
createRequestPendingIntent());
// Disconnect the client
requestDisconnection();
}
/**
* Request a connection to Location Services. This call returns immediately,
* but the request is not complete until onConnected() or onConnectionFailure() is called.
*/
private void requestConnection() {
getActivityRecognitionClient().connect();
}
/**
* Get the current activity recognition client, or create a new one if necessary.
* This method facilitates multiple requests for a client, even if a previous
* request wasn't finished. Since only one client object exists while a connection
* is underway, no memory leaks occur.
*
* @return An ActivityRecognitionClient object
*/
private ActivityRecognitionClient getActivityRecognitionClient() {
if (mActivityRecognitionClient == null) {
mActivityRecognitionClient =
new ActivityRecognitionClient(mContext, this, this);
}
return mActivityRecognitionClient;
}
/**
* Get the current activity recognition client and disconnect from Location Services
*/
private void requestDisconnection() {
getActivityRecognitionClient().disconnect();
}
/*
* Called by Location Services once the activity recognition client is connected.
*
* Continue by requesting activity updates.
*/
@Override
public void onConnected(Bundle arg0) {
// If debugging, log the connection
Log.w("Rakshak", "Locatin client connected");
// Continue the process of requesting activity recognition updates
continueRequestActivityUpdates();
}
/*
* Called by Location Services once the activity recognition client is disconnected.
*/
@Override
public void onDisconnected() {
// In debug mode, log the disconnection
Log.w("Rakshak", "Locatin client dis-connected");
// Destroy the current activity recognition client
mActivityRecognitionClient = null;
}
/**
* Get a PendingIntent to send with the request to get activity recognition updates. Location
* Services issues the Intent inside this PendingIntent whenever a activity recognition update
* occurs.
*
* @return A PendingIntent for the IntentService that handles activity recognition updates.
*/
private PendingIntent createRequestPendingIntent() {
// If the PendingIntent already exists
if (null != getRequestPendingIntent()) {
// Return the existing intent
return mActivityRecognitionPendingIntent;
// If no PendingIntent exists
} else {
// Create an Intent pointing to the IntentService
Intent intent = new Intent(mContext, ActivityRecognitionIntentService.class);
/*
* Return a PendingIntent to start the IntentService.
* Always create a PendingIntent sent to Location Services
* with FLAG_UPDATE_CURRENT, so that sending the PendingIntent
* again updates the original. Otherwise, Location Services
* can't match the PendingIntent to requests made with it.
*/
PendingIntent pendingIntent = PendingIntent.getService(mContext, 0, intent,
PendingIntent.FLAG_UPDATE_CURRENT);
setRequestPendingIntent(pendingIntent);
return pendingIntent;
}
}
/*
* Implementation of OnConnectionFailedListener.onConnectionFailed
* If a connection or disconnection request fails, report the error
* connectionResult is passed in from Location Services
*/
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
/*
* Google Play services can resolve some errors it detects.
* If the error has a resolution, try sending an Intent to
* start a Google Play services activity that can resolve
* error.
*/
if (connectionResult.hasResolution()) {
try {
connectionResult.startResolutionForResult((Activity) mContext,
ActivityUtils.CONNECTION_FAILURE_RESOLUTION_REQUEST);
/*
* Thrown if Google Play services canceled the original
* PendingIntent
*/
} catch (SendIntentException e) {
// display an error or log it here.
}
/*
* If no resolution is available, display Google
* Play service error dialog. This may direct the
* user to Google Play Store if Google Play services
* is out of date.
*/
} else {
Dialog dialog = GooglePlayServicesUtil.getErrorDialog(
connectionResult.getErrorCode(),
(Activity) mContext,
ActivityUtils.CONNECTION_FAILURE_RESOLUTION_REQUEST);
if (dialog != null) {
dialog.show();
}
}
}
}
インテント サービス:
public class ActivityRecognitionIntentService extends IntentService {
public ActivityRecognitionIntentService() {
// Set the label for the service's background thread
super("ActivityRecognitionIntentService");
}
@Override
protected void onHandleIntent(Intent intent) {
Log.w("Rakshak", "the on handel intent called"); // I see this only when the devices screen is on
// do some fun stuff
}