Phonegap应用程序在背景中死亡,同时收集位置

Question

我有一个内置在PhoneGap中的应用程序,它利用navigator.geolocation调用来跟踪移动设备的坐标.用户可以控制开始跟踪以及结束跟踪.该应用程序的构建是为了在后台接收坐标更新.该应用程序适用于Android和iOS设备.

Android版本似乎在后台崩溃时容易崩溃.在一些手机上它确实没问题,但是在很多手机上,应用程序只会在它应该在后台收集坐标数据时死掉.我在下面发布了一个LogCat日志.似乎WIN DEATH发生在管理员调用"不再需要"的过程CCWalkerActivity后不久Activity(两者都在下面加粗).但是,我无法确定为什么会发生这种情况以及为什么会这么频繁发生.

这是Phonegap的问题吗？创建一个可以使进程成为前台服务(使用startForeground())的插件是否有益？

10-19 14:50:12.439 D/dalvikvm(  496): GC_CONCURRENT freed 1917K, 28% free 12417K/17031K, external 11622K/13670K, paused 12ms+10ms
10-19 14:50:13.040 D/CordovaLog( 6275): isGPSEnabled succeeded, accuracy: 12
10-19 14:50:13.040 D/CordovaLog( 6275): file:///android_asset/www/lib.js: Line 24 : isGPSEnabled succeeded, accuracy: 12
10-19 14:50:13.040 I/Web Console( 6275): isGPSEnabled succeeded, accuracy: 12 at file:///android_asset/www/lib.js:24
10-19 14:50:13.072 D/CordovaLog( 6275): collectLocationData success: 12
10-19 14:50:13.072 D/CordovaLog( 6275): file:///android_asset/www/lib.js: Line 24 : collectLocationData success: 12
10-19 14:50:13.072 I/Web Console( 6275): collectLocationData success: 12 at file:///android_asset/www/lib.js:24
10-19 14:50:14.072 D/WifiLocator(  976): Too many no-location APs. Will not compute a location nor go to the server. hasLocation=0 noLocation=0 cacheMiss=0
10-19 14:50:14.072 D/CellLocator(  976): Found cell location: Position [redacted]
10-19 14:50:14.072 D/androidNlpServiceThread(  976): reporting Location[mProvider=network,mTime=1350672614078,mLatitude=40.8390777,mLongitude=-73.6949326,mHasAltitude=false,mAltitude=0.0,mHasSpeed=false,mSpeed=0.0,mHasBearing=false,mBearing=0.0,mHasAccuracy=true,mAccuracy=1123.0,mExtras=Bundle[{networkLocationSource=cached, networkLocationType=cell}]]
10-19 14:50:14.087 D/libgps  (  496): GpsInterface_inject_location( 40.839078, -73.694933, 1123.000 )
10-19 14:50:14.087 D/libgps  (  496): MPDINJPOS_REQ msg id 12015
10-19 14:50:14.087 D/ClientReporter(  976): reported location
10-19 14:50:14.095 D/CordovaLog( 6275): collectLocationData success: 1123
10-19 14:50:14.095 D/CordovaLog( 6275): file:///android_asset/www/lib.js: Line 24 : collectLocationData success: 1123
10-19 14:50:14.095 I/Web Console( 6275): collectLocationData success: 1123 at file:///android_asset/www/lib.js:24
10-19 14:50:14.118 D/androidNlpServiceThread(  976): adding listener com.google.android.location.internal.client.NetworkLocationClient$1@40552710 with period 45
10-19 14:50:14.118 D/androidNetworkLocationListeners(  976): Still have listener com.google.android.location.internal.client.NetworkLocationClient$1@40552710
10-19 14:50:14.118 I/ActivityManager(  496): No longer want com.CCtracks.CCWalker (pid 6275): hidden #21
10-19 14:50:14.126 D/WifiLocator(  976): Too many no-location APs. Will not compute a location nor go to the server. hasLocation=0 noLocation=0 cacheMiss=0
10-19 14:50:14.126 D/CellLocator(  976): Found cell location: Position [redacted]
10-19 14:50:14.126 D/androidNlpServiceThread(  976): reporting Location[mProvider=network,mTime=1350672614137,mLatitude=40.8390777,mLongitude=-73.6949326,mHasAltitude=false,mAltitude=0.0,mHasSpeed=false,mSpeed=0.0,mHasBearing=false,mBearing=0.0,mHasAccuracy=true,mAccuracy=1123.0,mExtras=Bundle[{networkLocationSource=cached, networkLocationType=cell}]]
10-19 14:50:14.134 D/ClientReporter(  976): reported location
10-19 14:50:14.204 I/WindowManager(  496): WIN DEATH: Window{405a97d0 com.CCtracks.CCWalker/com.CCtracks.CCWalker.CCWalkerActivity paused=false}
10-19 14:50:14.228 D/androidNlpServiceThread(  976): adding listener com.google.android.location.internal.client.NetworkLocationClient$1@40552710 with period 86400
10-19 14:50:14.228 D/androidNetworkLocationListeners(  976): Still have listener com.google.android.location.internal.client.NetworkLocationClient$1@40552710
10-19 14:50:14.236 D/WifiLocator(  976): Too many no-location APs. Will not compute a location nor go to the server. hasLocation=0 noLocation=0 cacheMiss=0
10-19 14:50:14.236 D/CellLocator(  976): Found cell location: Position [redacted]
10-19 14:50:14.236 D/androidNlpServiceThread(  976): reporting Location[mProvider=network,mTime=1350672614246,mLatitude=40.8390777,mLongitude=-73.6949326,mHasAltitude=false,mAltitude=0.0,mHasSpeed=false,mSpeed=0.0,mHasBearing=false,mBearing=0.0,mHasAccuracy=true,mAccuracy=1123.0,mExtras=Bundle[{networkLocationSource=cached, networkLocationType=cell}]]
10-19 14:50:14.243 D/ClientReporter(  976): reported location
10-19 14:50:14.595 W/GpsLocationProvider(  496): Unneeded remove listener for uid 1000
10-19 14:50:14.595 D/libgps_GpsMgr(  496): schedGps() mode: 3, tbf: 0, accuracy: 0, perf: 0, pAgps: null
10-19 14:50:14.595 D/libgps  (  496): GpsInterface_stop()
10-19 14:50:14.603 D/libgps  (  496): action_thread_main(): BP not in session, sending fake END callback
10-19 14:50:14.603 D/libgps  (  496): status_cb: GPS_STATUS_SESSION_END (2)
10-19 14:50:14.603 D/libgps_GpsMgr(  496): sched() set mode: 3, tbf: 0
10-19 14:50:14.634 D/libgps  (  496): GpsInterface_inject_location( 40.839078, -73.694933, 1123.000 )
10-19 14:50:14.634 D/libgps  (  496): MPDINJPOS_REQ msg id 12015

Answer 1

如果您的应用程序进程在前台或前台服务中没有任何活动，则系统可以随时终止它，以便为其他应用程序释放内存。

因此，在您的情况下，当用户使用例如主页按钮离开您的应用程序时调用 Activity.onPause 后，您的应用程序进程可以随时被终止。

http://developer.android.com/guide/components/processes-and-threads.html#Lifecycle