我有一个 IntentService，它创建一个新线程并运行一个长时间的操作。
@Override
protected void onHandleIntent(Intent intent) {
Log.d(TAG, "onHandleIntent at " + Calendar.getInstance().getTime());
new Thread() {
public void run() {
Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
<< A VERY LONG OPERATION == NETWORK + FILESYSTEM etc >>
};
}.start();
}
即使它是一个 IntentService，我也会因为这项服务而看到 ANR。根据我的理解 IntentService 在自己的线程上运行对吗？
06-28 02:18:36.751 I/ActivityManager( 1109): START {cmp=x.y.z/.MainActivity} from pid 466
06-28 02:19:56.861 W/ActivityManager( 1109): Timeout executing service: ServiceRecord{41767d48 x.y.z/x.y.a.RefreshService}
06-28 02:19:58.001 E/ActivityManager( 1109): ANR in x.y.z
06-28 02:19:58.001 E/ActivityManager( 1109): Reason: Executing service x.y.z/x.y.a.RefreshService
06-28 02:19:58.001 E/ActivityManager( 1109): Load: 8.5 / 8.16 / 7.52
06-28 02:19:58.001 E/ActivityManager( 1109): CPU usage from 14986ms to 0ms ago:
06-28 02:19:58.001 E/ActivityManager( 1109): 117% 2317/mediaserver: 45% user + 71% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 57% 2316/debuggerd: 47% user + 10% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 9.5% 1030/PE_Single_CPU: 3.2% user + 6.3% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 0.6% 1109/system_server: 0% user + 0.6% kernel / faults: 1783 minor
06-28 02:19:58.001 E/ActivityManager( 1109): 0.2% 904/yaffs-bg-1: 0% user + 0.2% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 0.1% 901/yaffs-bg-1: 0% user + 0.1% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 0% 1//init: 0% user + 0% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 0% 249/sync_supers: 0% user + 0% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 0% 923/virtualSensors: 0% user + 0% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 0% 1480/com.google.android.gm: 0% user + 0% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 0% 1545/com.updater: 0% user + 0% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): +0% 786/logcat: 0% user + 0% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 98% TOTAL: 53% user + 43% kernel + 0.9% softirq
06-28 02:19:58.001 E/ActivityManager( 1109): CPU usage from 551ms to 1089ms later:
06-28 02:19:58.001 E/ActivityManager( 1109): 110% 2317/mediaserver: 41% user + 69% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 56% 2451/MRVLFFPlayer: 23% user + 32% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 54% 1286/MRVLFFPlayer: 18% user + 36% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 67% 2316/debuggerd: 56% user + 10% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 7.4% 1030/PE_Single_CPU: 3.7% user + 3.7% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 3.7% 1065/AOUT_HAL_ISR_Ta: 1.8% user + 1.8% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 1.8% 1049/TSPMgr_MainTask: 1.8% user + 0% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 1.8% 1050/VPP_ISR_Task: 1.8% user + 0% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 1.8% 1072/gfxmgr_main_thr: 0% user + 1.8% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 5.5% 1109/system_server: 0% user + 5.5% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 5.5% 1136/ActivityManager: 0% user + 5.5% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 1% 497/kworker/1:1: 0% user + 1% kernel
06-28 02:19:58.001 E/ActivityManager( 1109): 1.8% 786/logcat: 0% user + 1.8% kernel / faults: 37 minor
06-28 02:19:58.001 E/ActivityManager( 1109): 96% TOTAL: 50% user + 45% kernel + 0.9% softirq
06-28 02:20:36.101 W/ActivityManager( 1109): Force finishing activity x.y.z/.MainActivity
06-28 02:20:36.141 I/ActivityManager( 1109): Killing ProcessRecord{41623b60 466:x.y.z/10031}: user's request
06-28 02:20:36.551 I/WindowManager( 1109): WIN DEATH: Window{41551c38 x.y.z/x.y.z.MainActivity paused=true}
06-28 02:20:36.551 I/ActivityManager( 1109): Process x.y.z (pid 466) has died.
06-28 02:20:36.551 W/ActivityManager( 1109): Scheduling restart of crashed service x.y.z/x.y.a.RefreshService in 119400ms
此外，/data/anr/traces.txt 中的跟踪文件没有显示此服务的任何线程堆栈。我只能看到主线程的堆栈（正在播放视频）和其他 AsyncTask 线程。碰巧，主线程忙于设置数据源是否会为 ANR 创建后台线程？欢迎任何指导。
这是主线程和刷新线程的堆栈跟踪：
堆栈跟踪：
DALVIK THREADS:
(mutexes: tll=0 tsl=0 tscl=0 ghl=0)
"main" prio=5 tid=1 NATIVE
| group="main" sCount=1 dsCount=0 obj=0x40b06460 self=0x12958
| sysTid=1248 nice=0 sched=0/0 cgrp=default handle=1074144680
| schedstat=( 0 0 0 ) utm=100 stm=30 core=0
at android.media.MediaPlayer._setDataSource(Native Method)
at android.media.MediaPlayer.setDataSource(MediaPlayer.java:884)
at android.media.MediaPlayer.setDataSource(MediaPlayer.java:846)
at android.widget.VideoView.openVideo(VideoView.java:275)
at android.widget.VideoView.access$2100(VideoView.java:49)
at android.widget.VideoView$6.surfaceCreated(VideoView.java:520)
at android.view.SurfaceView.updateWindow(SurfaceView.java:597)
at android.view.SurfaceView.access$000(SurfaceView.java:86)
at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:174)
at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:590)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1617)
at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2442)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
"Thread-158" prio=5 tid=20 NATIVE
| group="main" sCount=1 dsCount=0 obj=0x411a38a8 self=0x25af28
| sysTid=1301 nice=0 sched=0/0 cgrp=default handle=1661840
| schedstat=( 0 0 0 ) utm=1 stm=3 core=0
at libcore.io.Posix.recvfromBytes(Native Method)
at libcore.io.Posix.recvfrom(Posix.java:131)
at libcore.io.BlockGuardOs.recvfrom(BlockGuardOs.java:164)
at libcore.io.IoBridge.recvfrom(IoBridge.java:503)
at java.net.PlainSocketImpl.read(PlainSocketImpl.java:488)
at java.net.PlainSocketImpl.access$000(PlainSocketImpl.java:46)
at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:240)
at org.apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.java:103)
at org.apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.java:191)
at org.apache.http.impl.conn.DefaultResponseParser.parseHead(DefaultResponseParser.java:82)
at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:174)
at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:180)
at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:235)
at org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader(AbstractClientConnAdapter.java:259)
at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:279)
at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:121)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:428)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
at x.y.z.c.a.b(SourceFile:597)
at x.y.z.c.a.a(SourceFile:529)
at x.y.z.c.a.a(SourceFile:214)
at x.y.z.c.i.e(SourceFile:290)
at x.y.z.services.a.run(SourceFile:43)