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最近のタスクでアプリが終了した後にサービスを再起動する方法

デバイスの現在位置を定期的に取得するサービスを作成しました。最近開いたアプリからアプリを削除しても、サービスをバックグラウンドで実行したい。現在、サービスは、最近開いたアプリにアプリが表示されるまでバックグラウンドで実行されますが、アプリがスワイプオフ（または他の方法で強制終了）されるとすぐに停止します。スタックオーバーフローで利用できるあらゆる種類のヘルプを試しましたが、これを解決できません。助けてください。これがサービスのコードです。

package com.packr.services;

import Android.app.AlarmManager;
import Android.app.PendingIntent;
import Android.app.Service;
import Android.content.Context;
import Android.content.Intent;
import Android.content.pm.ServiceInfo;
import Android.location.Location;
import Android.os.Bundle;
import Android.os.IBinder;
import Android.os.SystemClock;
import Android.support.annotation.Nullable;
import Android.util.Log;
import Android.widget.Toast;

import com.google.Android.gms.common.ConnectionResult;
import com.google.Android.gms.common.api.GoogleApiClient;
import com.google.Android.gms.location.LocationListener;
import com.google.Android.gms.location.LocationRequest;
import com.google.Android.gms.location.LocationServices;

import Java.text.DateFormat;
import Java.util.Date;

/**
 * Created by Arindam on 11-Dec-15.
 */
public class LocationService extends Service implements
        GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {
    protected static final String TAG = "packrMATE";
    /**
     * The desired interval for location updates. Inexact. Updates may be more or less frequent.
     */
    public static final long UPDATE_INTERVAL_IN_MILLISECONDS = 10000;

    /**
     * The fastest rate for active location updates. Exact. Updates will never be more frequent
     * than this value.
     */
    public static final long FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS =
            UPDATE_INTERVAL_IN_MILLISECONDS / 2;

    // Keys for storing activity state in the Bundle.
    protected final static String REQUESTING_LOCATION_UPDATES_KEY = "requesting-location-updates-key";
    protected final static String LOCATION_KEY = "location-key";
    protected final static String LAST_UPDATED_TIME_STRING_KEY = "last-updated-time-string-key";

    /**
     * Provides the entry point to Google Play services.
     */
    protected GoogleApiClient mGoogleApiClient;

    /**
     * Stores parameters for requests to the FusedLocationProviderApi.
     */
    protected LocationRequest mLocationRequest;

    /**
     * Represents a geographical location.
     */
    protected Location mCurrentLocation;

    /**
     * Tracks the status of the location updates request. Value changes when the user presses the
     * Start Updates and Stop Updates buttons.
     */
    protected Boolean mRequestingLocationUpdates;

    /**
     * Time when the location was updated represented as a String.
     */
    protected String mLastUpdateTime;

    @Override
    public void onCreate() {
        Log.d(TAG,"Service started");
        super.onCreate();
        mRequestingLocationUpdates = false;
        mLastUpdateTime = "";

        // Kick off the process of building a GoogleApiClient and requesting the LocationServices
        // API.
        buildGoogleApiClient();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.d(TAG,"Service fucking started");
        mGoogleApiClient.connect();
        if (mGoogleApiClient.isConnected()) {
            startLocationUpdates();
        }
        return Service.START_STICKY;

    }

    @Override
    public void onDestroy() {
        mGoogleApiClient.disconnect();
        super.onDestroy();
    }

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

    @Override
    public void onConnected(Bundle bundle) {
        Log.i(TAG, "Connected to GoogleApiClient");

        // If the initial location was never previously requested, we use
        // FusedLocationApi.getLastLocation() to get it. If it was previously requested, we store
        // its value in the Bundle and check for it in onCreate(). We
        // do not request it again unless the user specifically requests location updates by pressing
        // the Start Updates button.
        //
        // Because we cache the value of the initial location in the Bundle, it means that if the
        // user launches the activity,
        // moves to a new location, and then changes the device orientation, the original location
        // is displayed as the activity is re-created.
        if (mCurrentLocation == null) {
            mCurrentLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
            mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());
            Toast.makeText(getApplicationContext(),"Hello Babe",Toast.LENGTH_SHORT).show();
        }

        // If the user presses the Start Updates button before GoogleApiClient connects, we set
        // mRequestingLocationUpdates to true (see startUpdatesButtonHandler()). Here, we check
        // the value of mRequestingLocationUpdates and if it is true, we start location updates.
            startLocationUpdates();
    }

    @Override
    public void onConnectionSuspended(int i) {
        // The connection to Google Play services was lost for some reason. We call connect() to
        // attempt to re-establish the connection.
        Log.i(TAG, "Connection suspended");
        mGoogleApiClient.connect();
    }

    @Override
    public void onLocationChanged(Location location) {
        mCurrentLocation = location;
        mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());
        Toast.makeText(this, String.valueOf(location.getLatitude() + " "+ String.valueOf(location.getLongitude())),
                Toast.LENGTH_SHORT).show();
        Log.e(TAG,"fuck man location found");
    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        // Refer to the javadoc for ConnectionResult to see what error codes might be returned in
        // onConnectionFailed.
        Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = " + connectionResult.getErrorCode());
    }

    protected synchronized void buildGoogleApiClient() {
        Log.i(TAG, "Building GoogleApiClient");
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
        createLocationRequest();

    }
    /**
     * Sets up the location request. Android has two location request settings:
     * {@code ACCESS_COARSE_LOCATION} and {@code ACCESS_FINE_LOCATION}. These settings control
     * the accuracy of the current location. This sample uses ACCESS_FINE_LOCATION, as defined in
     * the AndroidManifest.xml.
     * <p/>
     * When the ACCESS_FINE_LOCATION setting is specified, combined with a fast update
     * interval (5 seconds), the Fused Location Provider API returns location updates that are
     * accurate to within a few feet.
     * <p/>
     * These settings are appropriate for mapping applications that show real-time location
     * updates.
     */
    protected void createLocationRequest() {
        mLocationRequest = new LocationRequest();

        // Sets the desired interval for active location updates. This interval is
        // inexact. You may not receive updates at all if no location sources are available, or
        // you may receive them slower than requested. You may also receive updates faster than
        // requested if other applications are requesting location at a faster interval.
        mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);

        // Sets the fastest rate for active location updates. This interval is exact, and your
        // application will never receive updates faster than this value.
        mLocationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);

        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    }

    /**
     * Requests location updates from the FusedLocationApi.
     */
    protected void startLocationUpdates() {
        // The final argument to {@code requestLocationUpdates()} is a LocationListener
        // (http://developer.Android.com/reference/com/google/Android/gms/location/LocationListener.html).
        LocationServices.FusedLocationApi.requestLocationUpdates(
                mGoogleApiClient, mLocationRequest, this);
    }
    /**
     * Removes location updates from the FusedLocationApi.
     */
    protected void stopLocationUpdates() {
        // It is a good practice to remove location requests when the activity is in a paused or
        // stopped state. Doing so helps battery performance and is especially
        // recommended in applications that request frequent location updates.

        // The final argument to {@code requestLocationUpdates()} is a LocationListener
        // (http://developer.Android.com/reference/com/google/Android/gms/location/LocationListener.html).
        LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
    }
    @Override
    public void onTaskRemoved(Intent rootIntent) {
        Log.e("FLAGX : ", ServiceInfo.FLAG_STOP_WITH_TASK + "");
        Intent restartServiceIntent = new Intent(getApplicationContext(),
                this.getClass());
        restartServiceIntent.setPackage(getPackageName());

        PendingIntent restartServicePendingIntent = PendingIntent.getService(
                getApplicationContext(), 1, restartServiceIntent,
                PendingIntent.FLAG_ONE_SHOT);
        AlarmManager alarmService = (AlarmManager) getApplicationContext()
                .getSystemService(Context.ALARM_SERVICE);
        alarmService.set(AlarmManager.ELAPSED_REALTIME,
                SystemClock.elapsedRealtime() + 1000,
                restartServicePendingIntent);

        super.onTaskRemoved(rootIntent);
    }
}
androidandroid-servicerestartbackground-serviceandroid-service-binding
15
Arindam Dawn

サービスのonTaskRemoved（）をオーバーライドし、アラームマネージャーを使用してサービスを再開します。以下は、同じことを行い、正常に動作するアプリのコードです。

@Override
public void onTaskRemoved(Intent rootIntent) {
    super.onTaskRemoved(rootIntent);

    Log.d(TAG, "TASK REMOVED");

    PendingIntent service = PendingIntent.getService(
            getApplicationContext(),
            1001,
            new Intent(getApplicationContext(), MyService.class),
            PendingIntent.FLAG_ONE_SHOT);

    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, 1000, service);
}

低メモリで（または何らかの理由で）サービスが強制終了された場合でも定期的に場所を送信したい場合があるため、N秒後に再起動するようにuncaughtExceptionを処理することをお勧めします。これは、完璧に機能するアプリで行った方法です。

private Thread.UncaughtExceptionHandler defaultUEH;
private Thread.UncaughtExceptionHandler uncaughtExceptionHandler = new Thread.UncaughtExceptionHandler() {

    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        Log.d(TAG, "Uncaught exception start!");
        ex.printStackTrace();

        //Same as done in onTaskRemoved()
        PendingIntent service = PendingIntent.getService(
                getApplicationContext(),
                1001,
                new Intent(getApplicationContext(), MyService.class),
                PendingIntent.FLAG_ONE_SHOT);

        AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, 1000, service);
        System.exit(2);
        }
    };

注：私は、START_STICKYがKitKat以上のAPIレベルでは機能しないことを、KitKatで確認したことを覚えています。ご自身でご確認ください。

もっと：
loc送信を定期的に行うため、ディープスリープモードを考慮する必要がある場合があります。ディープスリープで機能するようにするには、 WakefulBroadcastReceiver をAlarmManagerと組み合わせて使用​​します。私の他の投稿を見てください ディープスリープモードでhttpを使用する方法 。

UPDATE：
ユーザーが設定からアプリケーションを「強制停止」した場合、このソリューションは機能しません（実際には機能する必要はありません）。ユーザー自身がアプリケーションを停止したい場合、サービスを再起動することは良い方法ではないので、これは実際に良いです。だから、それは結構です。

24
cgr

return Service.START_NOT_STICKY;をreturn START_STICKY;に置き換えます

0
Hojjat Imani

[〜＃〜] only [〜＃〜]最近のタスクから終了した後にサービスを再起動したい場合は、簡単に使用してください

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

START_STICKYを使用している場合、最近のタスクからアプリを強制終了すると、サービスが強制終了されます（onTaskRemoved fired、onDestroy[〜＃〜] not [〜＃ 〜]発砲）[〜＃〜]その後[〜＃〜]自動的に再起動します（onCreate発砲、onStartComand発砲）

0
Phan Van Linh