Question

Hello是Android开发的新手，我需要获取用户位置15分钟并发送到服务器我知道我可以使用服务完成。实施后我从最近的内存中清除应用程序我停止更新我读取并尝试了所有解决方案我怎样才能实现这一点，即使最近的应用程序被清除需要确保我的服务正在运行并获取用户位置让我发布我的服务代码：

public class GPSService extends Service
{
    private static final String TAG = "BOOMBOOMTESTGPS";
    private LocationManager mLocationManager = null;
    private static final int LOCATION_INTERVAL = 10000;
    private static final float LOCATION_DISTANCE = 0;

    private class LocationListener implements android.location.LocationListener
    {
        Location mLastLocation;

        public LocationListener(String provider)
        {
            Log.e(TAG, "LocationListener " + provider);
            mLastLocation = new Location(provider);
        }

        @Override
        public void onLocationChanged(Location location)
        {
            Log.e(TAG, "onLocationChanged: " + location);
            mLastLocation.set(location);
        }

        @Override
        public void onProviderDisabled(String provider)
        {
            Log.e(TAG, "onProviderDisabled: " + provider);
        }

        @Override
        public void onProviderEnabled(String provider)
        {
            Log.e(TAG, "onProviderEnabled: " + provider);
        }

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras)
        {
            Log.e(TAG, "onStatusChanged: " + provider);
        }
    }

    LocationListener[] mLocationListeners = new LocationListener[] {
            new LocationListener(LocationManager.GPS_PROVIDER),
            new LocationListener(LocationManager.NETWORK_PROVIDER)
    };

    @Override
    public IBinder onBind(Intent arg0)
    {
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId)
    {
        Log.e(TAG, "onStartCommand");
        super.onStartCommand(intent, flags, startId);
        return START_STICKY;
    }

    @Override
    public void onCreate()
    {
        Log.e(TAG, "onCreate");
        initializeLocationManager();
        try {
            mLocationManager.requestLocationUpdates(
                    LocationManager.NETWORK_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
                    mLocationListeners[1]);
        } catch (java.lang.SecurityException ex) {
            Log.i(TAG, "fail to request location update, ignore", ex);
        } catch (IllegalArgumentException ex) {
            Log.d(TAG, "network provider does not exist, " + ex.getMessage());
        }
        try {
            mLocationManager.requestLocationUpdates(
                    LocationManager.GPS_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
                    mLocationListeners[0]);
        } catch (java.lang.SecurityException ex) {
            Log.i(TAG, "fail to request location update, ignore", ex);
        } catch (IllegalArgumentException ex) {
            Log.d(TAG, "gps provider does not exist " + ex.getMessage());
        }
    }
    @Override public void onTaskRemoved(Intent rootIntent){
                super.onTaskRemoved(rootIntent);
        Intent restartService = new Intent(getApplicationContext(),
                this.getClass());
        restartService.setPackage(getPackageName());
        PendingIntent restartServicePI = PendingIntent.getService(
                getApplicationContext(), 1, restartService,
                PendingIntent.FLAG_ONE_SHOT);
        AlarmManager alarmService = (AlarmManager)getApplicationContext().getSystemService(Context.ALARM_SERVICE);
        alarmService.set(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime() +1000, restartServicePI);

    }
    @Override
    public void onDestroy()
    {
        Log.e(TAG, "onDestroy");
        super.onDestroy();
        Intent intent = new Intent("restartApps");
        sendBroadcast(intent);
        if (mLocationManager != null) {
            for (int i = 0; i < mLocationListeners.length; i++) {
                try {
                    mLocationManager.removeUpdates(mLocationListeners[i]);
                } catch (Exception ex) {
                    Log.i(TAG, "fail to remove location listners, ignore", ex);
                }
            }
        }
    }

    private void initializeLocationManager() {
        Log.e(TAG, "initializeLocationManager");
        if (mLocationManager == null) {
            mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
        }
    }
}

我的广播接收器：

public class RestartService extends BroadcastReceiver {

    private static final String TAG = "RestartService";

    public RestartService() {
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.e(TAG, "onReceive");
        context.startService(new Intent(context, GPSService.class));
    }
}

我的清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="precisioninfomatics.backgroundgps">

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
    <application
        android:name=".gspapp"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".GPS"
            android:label="@string/app_name"
            android:theme="@style/AppTheme.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <service
            android:name=".MyLocationService"
            android:exported="true"
            android:permission="com.google.android.gms.permission.BIND_NETWORK_TASK_SERVICE"
            android:stopWithTask="false">
            <intent-filter>
                <action android:name="com.google.android.gms.gcm.ACTION_TASK_READY" />
            </intent-filter>
        </service>
        <service
            android:name=".GPSService"
            android:enabled="true"
            android:stopWithTask="false"
            android:exported="false" />
        <receiver
            android:name=".RestartService"
            android:enabled="true" >
            <intent-filter>
                <action android:name="restartApps" />
            </intent-filter>
        </receiver>
    </application>

</manifest>

我的问题是：

1。在清除我最近的应用程序后，需要获取用户位置 2.如果用户强制停止设置如何重新启动我的服务

提前致谢

Answer 1

使用START_STICKY服务启动服务，这样如果它因为某些优先级而被重新启动而被杀死，如果你想在后台继续运行这项服务而WAKE_Lock那个服务并使用Alarm Manager检查它是否运行。

Answer 2

You can use AlarmManager to schedule your service. Something like:

AlarmManager alarm =( AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
    Intent checkLocationIntent = new Intent(context, CheckLocationService.class);

    PendingIntent pendingIntent = PendingIntent.getService(context, 0, checkLocationIntent, 0);

    alarm.setInexactRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, ALARM_INTERVAL_MILLISECONDS,
            ALARM_INTERVAL_MILLISECONDS, pendingIntent);

This will run the CheckLocationService every ALARM_INTERVAL_MILLISECONDS time

如何使用服务在后台服务中运行gps 15分钟？

2 个答案: