Android ANR 分析

首先贴一下trace 文件

Process: com.oppo.reader
PID: 20358
Time: 2933175644_1545041895232
Flags: 0x38d83e44
Package: com.oppo.reader v62301 (6.2.3.20181030)
PID: 20358
Foreground: Yes
Activity: com.oppo.reader/com.zhangyue.iReader.read.ui.Activity_BookBrowser_TXT
Subject: Input dispatching timed out (Waiting to send non-key event because the touched window has not finished processing certain input events that were delivered to it over 500.0ms ago.  Wait queue length: 2.  Wait queue head age: 8825.0ms.)
Build: OPPO/PBFM00/PBFM00:8.1.0/OPM1.171019.026/1541766248:user/release-keys

CPU usage from 0ms to 6451ms later (2018-12-17 18:18:08.726 to 2018-12-17 18:18:15.177):
  100% 20358/com.oppo.reader: 97% user + 3.5% kernel / faults: 4111 minor 3 major
  39% 1895/system_server: 27% user + 11% kernel / faults: 3126 minor 26 major
  0.2% 1167/media.codec: 0.2% user + 0% kernel / faults: 4081 minor
  4% 17827/com.android.systemui: 3.2% user + 0.7% kernel / faults: 1640 minor 224 major
  3.7% 2835/com.android.phone: 3.2% user + 0.4% kernel / faults: 434 minor
  3.4% 687/surfaceflinger: 2.4% user + 0.9% kernel / faults: 454 minor
  2.4% 11552/kworker/u16:8: 0% user + 2.4% kernel
  0% 1155/media.extractor: 0% user + 0% kernel / faults: 2832 minor
  1.2% 654/android.hardware.graphics.composer@2.1-service: 0.7% user + 0.4% kernel / faults: 11 minor
  1.2% 17450/com.coloros.floatassistant:float: 1% user + 0.1% kernel / faults: 146 minor
  1% 451/logd: 0% user + 1% kernel / faults: 10 minor
  0% 3789/com.coloros.appmanager: 0% user + 0% kernel / faults: 270 minor
  0.9% 21424/klogd: 0.3% user + 0.6% kernel / faults: 1 minor
  0.7% 659/android.hardware.sensors@1.0-service: 0.1% user + 0.6% kernel
  0.7% 10558/kworker/u16:0: 0% user + 0.7% kernel
  0% 17711/com.oppo.gestureservice: 0% user + 0% kernel / faults: 407 minor
  0% 17730/com.color.eyeprotect: 0% user + 0% kernel / faults: 592 minor
  0% 17754/com.oppo.resmonitor: 0% user + 0% kernel / faults: 597 minor 5 major
  0.7% 21425/xkit_10: 0.7% user + 0% kernel
  0.6% 86/kcompactd0: 0% user + 0.6% kernel
  0.6% 11551/kworker/u16:7: 0% user + 0.6% kernel
  0.6% 21426/xkit_10: 0.3% user + 0.3% kernel / faults: 6 minor
  0.4% 329/mmc-cmdqd/0: 0% user + 0.4% kernel
  0.4% 424/ueventd: 0.1% user + 0.3% kernel
  0.4% 452/servicemanager: 0.3% user + 0.1% kernel
  0.4% 14513/irq/280-touchpa: 0% user + 0.4% kernel
  0.3% 1//init: 0% user + 0.3% kernel / faults: 19 minor
  0.3% 138/kswapd0: 0% user + 0.3% kernel
  0.3% 245/kgsl_worker_thr: 0% user + 0.3% kernel
  0.3% 3492/neo: 0.3% user + 0% kernel
  0.3% 14491/mdss_fb0: 0% user + 0.3% kernel
  0.3% 17688/com.coloros.exserviceui: 0.1% user + 0.1% kernel / faults: 9 minor 1 major
  0.1% 7/rcu_preempt: 0% user + 0.1% kernel
  0.1% 21/rcuop/1: 0% user + 0.1% kernel
  0% 423/kworker/0:1H: 0% user + 0% kernel
  0.1% 658/android.hardware.power@1.0-service: 0.1% user + 0% kernel
  0.1% 740/sensors.qcom: 0.1% user + 0% kernel / faults: 3 minor
  0.1% 1030/kworker/10:0: 0% user + 0.1% kernel
  0.1% 1134/cameraserver: 0% user + 0.1% kernel / faults: 26 minor
  0% 1136/drmserver: 0% user + 0% kernel / faults: 91 minor 3 major
  0% 1154/mediadrmserver: 0% user + 0% kernel / faults: 181 minor 59 major
  0% 1159/mediaserver: 0% user + 0% kernel / faults: 34 minor
  0.1% 1168/rild: 0% user + 0.1% kernel / faults: 2 minor
  0% 1170/zygote64: 0% user + 0% kernel / faults: 25 minor
  0.1% 1177/zygote: 0% user + 0.1% kernel / faults: 16 minor
  0% 1223/tombstoned: 0% user + 0% kernel
  0.1% 1261/imsdatadaemon: 0% user + 0.1% kernel
  0.1% 1330/rild: 0.1% user + 0% kernel
  0.1% 12333/com.tencent.mobileqq:MSF: 0.1% user + 0% kernel / faults: 45 minor 99 major
  0.1% 12352/com.tencent.mobileqq: 0% user + 0.1% kernel / faults: 45 minor 113 major
  0.1% 13204/com.tencent.mm: 0.1% user + 0% kernel / faults: 22 minor 69 major
  0.1% 13717/com.tencent.mm:tools: 0.1% user + 0% kernel / faults: 179 minor 322 major
  0.1% 14509/logcat: 0.1% user + 0% kernel
  0.1% 14782/kworker/3:3: 0% user + 0.1% kernel
  0.1% 19348/com.android.browser: 0.1% user + 0% kernel / faults: 77 minor 129 major
  0.1% 19469/logcat: 0% user + 0.1% kernel
  0.1% 19738/kworker/1:2: 0% user + 0.1% kernel
  0.1% 20519/kworker/2:3: 0% user + 0.1% kernel
  0.1% 20821/kworker/0:1: 0% user + 0.1% kernel
  0.1% 20849/diag_mdlog: 0% user + 0.1% kernel
  0.1% 21334/cat: 0% user + 0.1% kernel
  0.1% 21428/logcat: 0% user + 0.1% kernel
26% TOTAL: 20% user + 4.6% kernel + 0.5% iowait + 0.3% irq + 0.1% softirq

----- pid 20358 at 2018-12-17 18:18:09 -----
Cmd line: com.oppo.reader
Build fingerprint: 'OPPO/PBFM00/PBFM00:8.1.0/OPM1.171019.026/1541766248:user/release-keys'
ABI: 'arm'
Build type: optimized
Zygote loaded classes=5110 post zygote classes=3166
Intern table: 52731 strong; 145 weak
JNI: CheckJNI is off; globals=727 (plus 79 weak)
Libraries: /data/app/com.oppo.reader-NTuEuWlogpCo1aD9HtyDhQ==/lib/arm/libUiControl.so /data/app/com.oppo.reader-NTuEuWlogpCo1aD9HtyDhQ==/lib/arm/libtingReader.so /system/app/WebViewGoogleNX/WebViewGoogleNX.apk!/lib/armeabi-v7a/libwebviewchromium.so /system/lib/libandroid.so /system/lib/libcompiler_rt.so /system/lib/libjavacrypto.so /system/lib/libjnigraphics.so /system/lib/libmedia_jni.so /system/lib/libqti_performance.so /system/lib/libsoundpool.so /system/lib/libwebviewchromium_loader.so /system/lib/libwebviewchromium_plat_support.so libjavacore.so libopenjdk.so (14)
Heap: 24% free, 16MB/22MB; 262809 objects
Dumping cumulative Gc timings
Start Dumping histograms for 8 iterations for concurrent copying
ProcessMarkStack:	Sum: 430.463ms 99% C.I. 12.291ms-126.080ms Avg: 53.807ms Max: 127.672ms
ScanImmuneSpaces:	Sum: 94.022ms 99% C.I. 8.543ms-24.656ms Avg: 11.752ms Max: 25.146ms
VisitConcurrentRoots:	Sum: 44.525ms 99% C.I. 4.612ms-8.508ms Avg: 5.565ms Max: 8.527ms
SweepLargeObjects:	Sum: 26.256ms 99% C.I. 1.062ms-8.484ms Avg: 3.282ms Max: 8.507ms
ClearFromSpace:	Sum: 13.381ms 99% C.I. 0.359ms-3.134ms Avg: 1.672ms Max: 3.145ms
GrayAllDirtyImmuneObjects:	Sum: 11.950ms 99% C.I. 0.352ms-8.112ms Avg: 1.493ms Max: 8.351ms
FlipOtherThreads:	Sum: 10.679ms 99% C.I. 0.956ms-2.934ms Avg: 1.334ms Max: 2.969ms
MarkZygoteLargeObjects:	Sum: 7.665ms 99% C.I. 45us-6824us Avg: 958.125us Max: 7023us
EnqueueFinalizerReferences:	Sum: 5.876ms 99% C.I. 95us-2168us Avg: 734.500us Max: 2168us
ProcessReferences:	Sum: 5.800ms 99% C.I. 4us-1463us Avg: 362.500us Max: 1463us
InitializePhase:	Sum: 5.308ms 99% C.I. 220us-3006us Avg: 663.500us Max: 3061us
ForwardSoftReferences:	Sum: 4.183ms 99% C.I. 14us-800us Avg: 522.875us Max: 800us
SweepSystemWeaks:	Sum: 4.176ms 99% C.I. 306us-1172us Avg: 522us Max: 1190us
RecordFree:	Sum: 1.808ms 99% C.I. 145us-671us Avg: 226us Max: 671us
VisitNonThreadRoots:	Sum: 1.565ms 99% C.I. 154us-286us Avg: 195.625us Max: 286us
MarkingPhase:	Sum: 1.317ms 99% C.I. 32us-916us Avg: 164.625us Max: 948us
ThreadListFlip:	Sum: 781us 99% C.I. 57us-239us Avg: 97.625us Max: 239us
EmptyRBMarkBitStack:	Sum: 727us 99% C.I. 13us-282us Avg: 90.875us Max: 282us
MarkStackAsLive:	Sum: 433us 99% C.I. 37us-73us Avg: 54.125us Max: 73us
(Paused)GrayAllNewlyDirtyImmuneObjects:	Sum: 430us 99% C.I. 39us-124us Avg: 53.750us Max: 124us
ReclaimPhase:	Sum: 241us 99% C.I. 17us-78us Avg: 30.125us Max: 78us
ResumeOtherThreads:	Sum: 232us 99% C.I. 6us-145us Avg: 29us Max: 145us
ResumeRunnableThreads:	Sum: 215us 99% C.I. 13us-50us Avg: 26.875us Max: 50us
ClearRegionSpaceCards:	Sum: 198us 99% C.I. 10us-61us Avg: 24.750us Max: 61us
SweepAllocSpace:	Sum: 147us 99% C.I. 6us-32us Avg: 18.375us Max: 32us
SwapBitmaps:	Sum: 124us 99% C.I. 11us-20us Avg: 15.500us Max: 20us
(Paused)SetFromSpace:	Sum: 105us 99% C.I. 3us-42us Avg: 13.125us Max: 42us
(Paused)ClearCards:	Sum: 79us 99% C.I. 250ns-7000ns Avg: 395ns Max: 7000ns
Sweep:	Sum: 71us 99% C.I. 6us-11us Avg: 8.875us Max: 11us
(Paused)FlipCallback:	Sum: 57us 99% C.I. 4us-19us Avg: 7.125us Max: 19us
FlipThreadRoots:	Sum: 35us 99% C.I. 3us-9us Avg: 4.375us Max: 9us
UnBindBitmaps:	Sum: 16us 99% C.I. 2us-2us Avg: 2us Max: 2us
Done Dumping histograms
concurrent copying paused:	Sum: 1.499ms 99% C.I. 133us-458us Avg: 187.375us Max: 458us
concurrent copying total time: 672.865ms mean time: 84.108ms
concurrent copying freed: 558166 objects with total size 84MB
concurrent copying throughput: 830604/s / 125MB/s
Cumulative bytes moved 12844720
Cumulative objects moved 272799
Total time spent in GC: 672.865ms
Mean GC size throughput: 65MB/s
Mean GC object throughput: 827833 objects/s
Total number of allocations 819829
Total bytes allocated 60MB
Total bytes freed 44MB
Free memory 5MB
Free memory until GC 5MB
Free memory until OOME 495MB
Total memory 22MB
Max memory 512MB
Zygote space size 780KB
Total mutator paused time: 1.499ms
Total time waiting for GC to complete: 34.535us
Total GC count: 8
Total GC time: 672.865ms
Total blocking GC count: 0
Total blocking GC time: 0
Histogram of GC count per 10000 ms: 0:8,1:3,4:1
Histogram of blocking GC count per 10000 ms: 0:12
Registered native bytes allocated: 23662650
/data/app/com.oppo.reader-NTuEuWlogpCo1aD9HtyDhQ==/oat/arm/base.odex: quicken
/system/app/WebViewGoogleNX/oat/arm/WebViewGoogleNX.odex: quicken
/data/app/com.oppo.reader-NTuEuWlogpCo1aD9HtyDhQ==/oat/arm/base.odex: quicken
Current JIT code cache size: 144KB
Current JIT data cache size: 107KB
Current JIT capacity: 512KB
Current number of JIT code cache entries: 124
Total number of JIT compilations: 147
Total number of JIT compilations for on stack replacement: 4
Total number of JIT code cache collections: 4
Memory used for stack maps: Avg: 565B Max: 6KB Min: 24B
Memory used for compiled code: Avg: 1277B Max: 9KB Min: 2B
Memory used for profiling info: Avg: 268B Max: 3KB Min: 16B
Start Dumping histograms for 151 iterations for JIT timings
Compiling:	Sum: 873.725ms 99% C.I. 0.149ms-48.568ms Avg: 5.943ms Max: 56.411ms
TrimMaps:	Sum: 12.710ms 99% C.I. 8us-689.750us Avg: 86.462us Max: 772us
Code cache collection:	Sum: 5.165ms 99% C.I. 0.877ms-2.372ms Avg: 1.291ms Max: 2.395ms
Done Dumping histograms
Memory used for compilation: Avg: 231KB Max: 2MB Min: 15KB
ProfileSaver total_bytes_written=0
ProfileSaver total_number_of_writes=0
ProfileSaver total_number_of_code_cache_queries=2
ProfileSaver total_number_of_skipped_writes=2
ProfileSaver total_number_of_failed_writes=0
ProfileSaver total_ms_of_sleep=101716
ProfileSaver total_ms_of_work=60
ProfileSaver max_number_profile_entries_cached=0
ProfileSaver total_number_of_hot_spikes=2
ProfileSaver total_number_of_wake_ups=4
Number of JIT inline cache deoptimizations: 2

suspend all histogram:	Sum: 1.234ms 99% C.I. 9us-160.399us Avg: 31.641us Max: 169us
DALVIK THREADS (70):
"Signal Catcher" daemon prio=5 tid=3 Runnable
  | group="system" sCount=0 dsCount=0 flags=0 obj=0x13500280 self=0xe6c0fc00
  | sysTid=20364 nice=0 cgrp=default sched=0/0 handle=0xdcbfe970
  | state=R schedstat=( 27239057 2910573 19 ) utm=2 stm=0 core=0 HZ=100
  | stack=0xdcb04000-0xdcb06000 stackSize=1006KB
  | held mutexes= "mutator lock"(shared held)
  native: #00 pc 002e8b57  /system/lib/libart.so (art::DumpNativeStack(std::__1::basic_ostream<char, std::__1::char_traits<char>>&, int, BacktraceMap*, char const*, art::ArtMethod*, void*)+130)
  native: #01 pc 0037b7f9  /system/lib/libart.so (art::Thread::DumpStack(std::__1::basic_ostream<char, std::__1::char_traits<char>>&, bool, BacktraceMap*, bool) const+204)
  native: #02 pc 00377d2b  /system/lib/libart.so (art::Thread::Dump(std::__1::basic_ostream<char, std::__1::char_traits<char>>&, bool, BacktraceMap*, bool) const+34)
  native: #03 pc 0038f8fb  /system/lib/libart.so (art::DumpCheckpoint::Run(art::Thread*)+698)
  native: #04 pc 0038947d  /system/lib/libart.so (art::ThreadList::RunCheckpoint(art::Closure*, art::Closure*)+320)
  native: #05 pc 00388f7b  /system/lib/libart.so (art::ThreadList::Dump(std::__1::basic_ostream<char, std::__1::char_traits<char>>&, bool)+530)
  native: #06 pc 00388c9b  /system/lib/libart.so (art::ThreadList::DumpForSigQuit(std::__1::basic_ostream<char, std::__1::char_traits<char>>&)+626)
  native: #07 pc 003652d3  /system/lib/libart.so (art::Runtime::DumpForSigQuit(std::__1::basic_ostream<char, std::__1::char_traits<char>>&)+122)
  native: #08 pc 0036d9b3  /system/lib/libart.so (art::SignalCatcher::HandleSigQuit()+1282)
  native: #09 pc 0036c91b  /system/lib/libart.so (art::SignalCatcher::Run(void*)+330)
  native: #10 pc 000473f3  /system/lib/libc.so (__pthread_start(void*)+22)
  native: #11 pc 0001afb1  /system/lib/libc.so (__start_thread+32)
  (no managed stack frames)

"main" prio=5 tid=1 Blocked
  | group="main" sCount=1 dsCount=0 flags=1 obj=0x71ebca68 self=0xe6c0f000
  | sysTid=20358 nice=-10 cgrp=default sched=0/0 handle=0xea9254a4
  | state=S schedstat=( 2882074832 469149273 2373 ) utm=241 stm=47 core=1 HZ=100
  | stack=0xff789000-0xff78b000 stackSize=8MB
  | held mutexes=
  at com.zhangyue.iReader.DB.DBAdapter.execSQL(SourceFile:2512)
  - waiting to lock <0x08d75003> (a com.zhangyue.iReader.DB.DBAdapter) held by thread 66
  at com.zhangyue.iReader.DB.DBAdapter.queryBookIDWithoutPath(SourceFile:1497)
  at com.zhangyue.iReader.read.ui.BookBrowserFragment.u(SourceFile:1223)
  at com.zhangyue.iReader.read.ui.BookBrowserFragment.U(SourceFile:368)
  at com.zhangyue.iReader.read.ui.cc.run(SourceFile:3098)
  at android.os.Handler.handleCallback(Handler.java:790)
  at android.os.Handler.dispatchMessage(Handler.java:99)
  at android.os.Looper.loop(Looper.java:198)
  at android.app.ActivityThread.main(ActivityThread.java:7038)
  at java.lang.reflect.Method.invoke(Native method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:519)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:836)

"Jit thread pool worker thread 0" daemon prio=5 tid=2 Native
  | group="main" sCount=1 dsCount=0 flags=1 obj=0x135001f8 self=0xdcd1f000
  | sysTid=20363 nice=9 cgrp=default sched=0/0 handle=0xdccff970
  | state=S schedstat=( 803558025 113797923 579 ) utm=76 stm=4 core=6 HZ=100
  | stack=0xdcc01000-0xdcc03000 stackSize=1022KB
  | held mutexes=
  kernel: (couldn't read /proc/self/task/20363/stack)
  native: #00 pc 00018e20  /system/lib/libc.so (syscall+28)
  native: #01 pc 000b79d1  /system/lib/libart.so (art::ConditionVariable::WaitHoldingLocks(art::Thread*)+80)
  native: #02 pc 00390b81  /system/lib/libart.so (art::ThreadPool::GetTask(art::Thread*)+172)
  native: #03 pc 003904f7  /system/lib/libart.so (art::ThreadPoolWorker::Run()+62)
  native: #04 pc 00390115  /system/lib/libart.so (art::ThreadPoolWorker::Callback(void*)+92)
  native: #05 pc 000473f3  /system/lib/libc.so (__pthread_start(void*)+22)
  native: #06 pc 0001afb1  /system/lib/libc.so (__start_thread+32)
  (no managed stack frames)

"ReferenceQueueDaemon" daemon prio=5 tid=4 Waiting
  | group="system" sCount=1 dsCount=0 flags=1 obj=0x13500308 self=0xdca14600
  | sysTid=20365 nice=4 cgrp=default sched=0/0 handle=0xc9e29970
  | state=S schedstat=( 34968799 11582865 55 ) utm=2 stm=1 core=4 HZ=100
  | stack=0xc9d27000-0xc9d29000 stackSize=1038KB
  | held mutexes=
  at java.lang.Object.wait(Native method)
  - waiting on <0x03602b80> (a java.lang.Class<java.lang.ref.ReferenceQueue>)
  at java.lang.Daemons$ReferenceQueueDaemon.runInternal(Daemons.java:183)
  - locked <0x03602b80> (a java.lang.Class<java.lang.ref.ReferenceQueue>)
  at java.lang.Daemons$Daemon.run(Daemons.java:108)
  at java.lang.Thread.run(Thread.java:764)

  "OkHttp https://icloud.zhangyue.com/..." prio=5 tid=66 Native
  | group="main" sCount=1 dsCount=0 flags=1 obj=0x133c0a30 self=0xc4ca9200
  | sysTid=21822 nice=0 cgrp=default sched=0/0 handle=0xbe396970
  | state=S schedstat=( 14565089915 55131141 764 ) utm=1423 stm=33 core=2 HZ=100
  | stack=0xbe294000-0xbe296000 stackSize=1038KB
  | held mutexes=
  kernel: (couldn't read /proc/self/task/21822/stack)
  native: #00 pc 00018e20  /system/lib/libc.so (syscall+28)
  native: #01 pc 000b79d1  /system/lib/libart.so (art::ConditionVariable::WaitHoldingLocks(art::Thread*)+80)
  native: #02 pc 003e2949  /system/lib/libart.so (art::GoToRunnable(art::Thread*)+300)
  native: #03 pc 003e27ed  /system/lib/libart.so (art::JniMethodEnd(unsigned int, art::Thread*)+8)
  native: #04 pc 00404d45  /system/framework/arm/boot-framework.oat (Java_android_database_sqlite_SQLiteConnection_nativeExecuteForChangedRowCount__JJ+132)
  at android.database.sqlite.SQLiteConnection.nativeExecuteForChangedRowCount(Native method)
  at android.database.sqlite.SQLiteConnection.executeForChangedRowCount(SQLiteConnection.java:748)
  at android.database.sqlite.SQLiteSession.executeForChangedRowCount(SQLiteSession.java:754)
  at android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:64)
  at android.database.sqlite.SQLiteDatabase.updateWithOnConflict(SQLiteDatabase.java:1658)
  at android.database.sqlite.SQLiteDatabase.update(SQLiteDatabase.java:1604)
  at com.zhangyue.iReader.DB.a.update(SourceFile:129)
  at com.zhangyue.iReader.DB.DBAdapter.update(SourceFile:4224)
  at dt.d.b(SourceFile:112)
  at com.zhangyue.iReader.DB.DBAdapter.updateHighLightByPostion(SourceFile:1657)
  at df.t.b(SourceFile:269)
  - locked <0x08d75003> (a com.zhangyue.iReader.DB.DBAdapter)
  at df.t.a(SourceFile:66)
  at df.al.a(SourceFile:118)
  at df.am.onHttpEvent(SourceFile:88)
  at com.zhangyue.net.p$b.onHttpEvent(SourceFile:138)
  at com.zhangyue.net.a.a(SourceFile:796)
  at com.zhangyue.net.a.a(SourceFile:63)
  at com.zhangyue.net.c.onResponse(SourceFile:698)
  at okhttp3.RealCall$AsyncCall.execute(SourceFile:153)
  at okhttp3.internal.NamedRunnable.run(SourceFile:32)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
  at java.lang.Thread.run(Thread.java:764)

开头会告诉你，是哪个包ANR 了。所以，以后搜索ANR 可以在log 里面搜索：

Cmd line: com.oppo.reader

后面替换成你的包名。

第一步：查看主线程

"main" prio=5 tid=1 Blocked
  | group="main" sCount=1 dsCount=0 flags=1 obj=0x71ebca68 self=0xe6c0f000
  | sysTid=20358 nice=-10 cgrp=default sched=0/0 handle=0xea9254a4
  | state=S schedstat=( 2882074832 469149273 2373 ) utm=241 stm=47 core=1 HZ=100
  | stack=0xff789000-0xff78b000 stackSize=8MB
  | held mutexes=
  at com.zhangyue.iReader.DB.DBAdapter.execSQL(SourceFile:2512)
  - waiting to lock <0x08d75003> (a com.zhangyue.iReader.DB.DBAdapter) held by thread 66
  at com.zhangyue.iReader.DB.DBAdapter.queryBookIDWithoutPath(SourceFile:1497)
  at com.zhangyue.iReader.read.ui.BookBrowserFragment.u(SourceFile:1223)
  at com.zhangyue.iReader.read.ui.BookBrowserFragment.U(SourceFile:368)
  at com.zhangyue.iReader.read.ui.cc.run(SourceFile:3098)
  at android.os.Handler.handleCallback(Handler.java:790)
  at android.os.Handler.dispatchMessage(Handler.java:99)
  at android.os.Looper.loop(Looper.java:198)
  at android.app.ActivityThread.main(ActivityThread.java:7038)
  at java.lang.reflect.Method.invoke(Native method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:519)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:836)

- waiting to lock <0x08d75003> (a com.zhangyue.iReader.DB.DBAdapter) held by thread 66

他说，在等待一个锁，0x08d75003。 你可以在trace 里面搜索这个字符，或者后面说，held by thread 66，那就搜索线程66

tid=66

第二步：找到线程66

  "OkHttp https://icloud.zhangyue.com/..." prio=5 tid=66 Native
  | group="main" sCount=1 dsCount=0 flags=1 obj=0x133c0a30 self=0xc4ca9200
  | sysTid=21822 nice=0 cgrp=default sched=0/0 handle=0xbe396970
  | state=S schedstat=( 14565089915 55131141 764 ) utm=1423 stm=33 core=2 HZ=100
  | stack=0xbe294000-0xbe296000 stackSize=1038KB
  | held mutexes=
  kernel: (couldn't read /proc/self/task/21822/stack)
  native: #00 pc 00018e20  /system/lib/libc.so (syscall+28)
  native: #01 pc 000b79d1  /system/lib/libart.so (art::ConditionVariable::WaitHoldingLocks(art::Thread*)+80)
  native: #02 pc 003e2949  /system/lib/libart.so (art::GoToRunnable(art::Thread*)+300)
  native: #03 pc 003e27ed  /system/lib/libart.so (art::JniMethodEnd(unsigned int, art::Thread*)+8)
  native: #04 pc 00404d45  /system/framework/arm/boot-framework.oat (Java_android_database_sqlite_SQLiteConnection_nativeExecuteForChangedRowCount__JJ+132)
  at android.database.sqlite.SQLiteConnection.nativeExecuteForChangedRowCount(Native method)
  at android.database.sqlite.SQLiteConnection.executeForChangedRowCount(SQLiteConnection.java:748)
  at android.database.sqlite.SQLiteSession.executeForChangedRowCount(SQLiteSession.java:754)
  at android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:64)
  at android.database.sqlite.SQLiteDatabase.updateWithOnConflict(SQLiteDatabase.java:1658)
  at android.database.sqlite.SQLiteDatabase.update(SQLiteDatabase.java:1604)
  at com.zhangyue.iReader.DB.a.update(SourceFile:129)
  at com.zhangyue.iReader.DB.DBAdapter.update(SourceFile:4224)
  at dt.d.b(SourceFile:112)
  at com.zhangyue.iReader.DB.DBAdapter.updateHighLightByPostion(SourceFile:1657)
  at df.t.b(SourceFile:269)
  - locked <0x08d75003> (a com.zhangyue.iReader.DB.DBAdapter)
  at df.t.a(SourceFile:66)
  at df.al.a(SourceFile:118)
  at df.am.onHttpEvent(SourceFile:88)
  at com.zhangyue.net.p$b.onHttpEvent(SourceFile:138)
  at com.zhangyue.net.a.a(SourceFile:796)
  at com.zhangyue.net.a.a(SourceFile:63)
  at com.zhangyue.net.c.onResponse(SourceFile:698)
  at okhttp3.RealCall$AsyncCall.execute(SourceFile:153)
  at okhttp3.internal.NamedRunnable.run(SourceFile:32)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
  at java.lang.Thread.run(Thread.java:764)

问下了同事， - locked <0x08d75003> (a com.zhangyue.iReader.DB.DBAdapter) 表示，从这行的堆栈开始，进入synchronized 代码块。（至于是不是，可以自己去获取堆栈，尝试下。）

那么，也就是在这里，子线程执行代码，占用了 - locked <0x08d75003> (a com.zhangyue.iReader.DB.DBAdapter)这个锁。

第三步：处理

怎么处理呢？

• 把没有用的锁，去掉。程序里面不要随意的加锁
• 我们这里是因为一大坨代码，都写在了执行事务里，导致，执行事务的时候，占用了SQLite 链接。导致主线程拿不到SQLite 的锁。

其他技巧

1.如果你觉得是某一块代码执行时间过长导致ANR,那么可以把这一块代码换成下面这个，看看会不会ANR.

        long begin  = System.currentTimeMillis();

        while(System.currentTimeMillis() - begin < 1000 * 60 * 10){
            a = 50;
            DBAdapter.getInstance().queryALLBook();
        }

上面这块代码，会执行10分钟。里面不停的执行SQL 操作。