低端设备加载webp ANR

先来看下这份ANR日志
复制代码
suspend all histogram:	Sum: 476us 99% C.I. 7us-64us Avg: 28us Max: 64us
DALVIK THREADS (38):
"Signal Catcher" daemon prio=10 tid=6 Runnable
  | group="system" sCount=0 dsCount=0 flags=0 obj=0x133811a0 self=0xf2322400
  | sysTid=5754 nice=-20 cgrp=default sched=0/0 handle=0xdca551c0
  | state=R schedstat=( 38398213 739957 14 ) utm=2 stm=1 core=2 HZ=100
  | stack=0xdc95a000-0xdc95c000 stackSize=1008KB
  | held mutexes= "mutator lock"(shared held)
  native: #00 pc 00371015  /apex/com.android.art/lib/libart.so (art::DumpNativeStack(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, int, BacktraceMap*, char const*, art::ArtMethod*, void*, bool)+76)
  native: #01 pc 0043fb87  /apex/com.android.art/lib/libart.so (art::Thread::DumpStack(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, bool, BacktraceMap*, bool) const+386)
  native: #02 pc 0043b553  /apex/com.android.art/lib/libart.so (art::Thread::Dump(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, bool, BacktraceMap*, bool) const+34)
  native: #03 pc 00458129  /apex/com.android.art/lib/libart.so (art::DumpCheckpoint::Run(art::Thread*)+664)
  native: #04 pc 00453703  /apex/com.android.art/lib/libart.so (art::ThreadList::RunCheckpoint(art::Closure*, art::Closure*)+354)
  native: #05 pc 00452c3b  /apex/com.android.art/lib/libart.so (art::ThreadList::Dump(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, bool)+1486)
  native: #06 pc 00452335  /apex/com.android.art/lib/libart.so (art::ThreadList::DumpForSigQuit(std::__1::basic_ostream<char, std::__1::char_traits<char> >&)+604)
  native: #07 pc 0040adc7  /apex/com.android.art/lib/libart.so (art::Runtime::DumpForSigQuit(std::__1::basic_ostream<char, std::__1::char_traits<char> >&)+130)
  native: #08 pc 0041a94b  /apex/com.android.art/lib/libart.so (art::SignalCatcher::HandleSigQuit()+1046)
  native: #09 pc 00419cef  /apex/com.android.art/lib/libart.so (art::SignalCatcher::Run(void*)+246)
  native: #10 pc 000aab73  /apex/com.android.runtime/lib/bionic/libc.so (__pthread_start(void*)+40)
  native: #11 pc 00063fe3  /apex/com.android.runtime/lib/bionic/libc.so (__start_thread+30)
  (no managed stack frames)

"main" prio=5 tid=1 Native
  | group="main" sCount=1 dsCount=0 flags=1 obj=0x7235aa78 self=0xf231de00
  | sysTid=5744 nice=-10 cgrp=default sched=0/0 handle=0xf26f1470
  | state=R schedstat=( 1084080374 75387661 399 ) utm=97 stm=11 core=1 HZ=100
  | stack=0xfeff2000-0xfeff4000 stackSize=8192KB
  | held mutexes=
  native: #00 pc 005359f4  /system/lib/libhwui.so (WebPRescalerImport+240)
  native: #01 pc 005060f0  /system/lib/libhwui.so (EmitRescaledRGB+116)
  native: #02 pc 00504e04  /system/lib/libhwui.so (CustomPut.llvm.16658038581547897248+52)
  native: #03 pc 00503ff0  /system/lib/libhwui.so (FinishRow.llvm.13521785089726402735+2040)
  native: #04 pc 00501c78  /system/lib/libhwui.so (IDecode+1124)
  native: #05 pc 00173f75  /system/lib/libhwui.so (SkWebpCodec::onGetPixels(SkImageInfo const&, void*, unsigned int, SkCodec::Options const&, int*)+1680)
  native: #06 pc 001695cf  /system/lib/libhwui.so (SkCodec::getPixels(SkImageInfo const&, void*, unsigned int, SkCodec::Options const*)+250)
  native: #07 pc 001663b7  /system/lib/libhwui.so (SkAndroidCodecAdapter::onGetAndroidPixels(SkImageInfo const&, void*, unsigned int, SkAndroidCodec::AndroidOptions const&)+42)
  native: #08 pc 0016606f  /system/lib/libhwui.so (SkAndroidCodec::getAndroidPixels(SkImageInfo const&, void*, unsigned int, SkAndroidCodec::AndroidOptions const*)+590)
  native: #09 pc 00119935  /system/lib/libhwui.so (android::ImageDecoder::decode(void*, unsigned int)+264)
  native: #10 pc 00104279  /system/lib/libhwui.so (ImageDecoder_nDecodeBitmap(_JNIEnv*, _jobject*, long long, _jobject*, unsigned char, int, int, _jobject*, unsigned char, int, unsigned char, unsigned char, unsigned char, long long, unsigned char)+824)
  at android.graphics.ImageDecoder.nDecodeBitmap(Native method)
  at android.graphics.ImageDecoder.decodeBitmapInternal(ImageDecoder.java:1712)
  at android.graphics.ImageDecoder.decodeDrawableImpl(ImageDecoder.java:1795)
  at android.graphics.ImageDecoder.decodeDrawable(ImageDecoder.java:1751)
  at android.content.res.ResourcesImpl.decodeImageDrawable(ResourcesImpl.java:808)
  at android.content.res.ResourcesImpl.loadDrawableForCookie(ResourcesImpl.java:883)
  at android.content.res.ResourcesImpl.loadDrawable(ResourcesImpl.java:673)
  at android.content.res.Resources.loadDrawable(Resources.java:993)
  at android.content.res.Resources.getDrawableForDensity(Resources.java:983)
  at android.content.res.Resources.getDrawable(Resources.java:922)
  at android.content.Context.getDrawable(Context.java:693)
  at androidx.core.content.ContextCompat$Api21Impl.getDrawable(ContextCompat.java:1049)
  at androidx.core.content.ContextCompat.getDrawable(ContextCompat.java:485)
  at androidx.appcompat.widget.ResourceManagerInternal.getDrawable(ResourceManagerInternal.java:147)
  - locked <0x028cc8e3> (a androidx.appcompat.widget.ResourceManagerInternal)
  at androidx.appcompat.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:475)
  - locked <0x0db8e2e0> (a androidx.appcompat.widget.AppCompatDrawableManager)
  at androidx.appcompat.widget.TintTypedArray.getDrawableIfKnown(TintTypedArray.java:93)
  at androidx.appcompat.app.AppCompatDelegateImpl.attachToWindow(AppCompatDelegateImpl.java:848)
  at androidx.appcompat.app.AppCompatDelegateImpl.ensureWindow(AppCompatDelegateImpl.java:824)
  at androidx.appcompat.app.AppCompatDelegateImpl.onCreate(AppCompatDelegateImpl.java:531)
  at androidx.appcompat.app.AppCompatActivity$2.onContextAvailable(AppCompatActivity.java:133)
  at androidx.activity.contextaware.ContextAwareHelper.dispatchOnContextAvailable(ContextAwareHelper.kt:84)
  at androidx.activity.ComponentActivity.onCreate(ComponentActivity.kt:331)
  at androidx.fragment.app.FragmentActivity.onCreate(FragmentActivity.java:216)
  at com.healthfitness.common.base.BaseActivity.onCreate(BaseActivity.kt:22)
  at com.healthfitness.xxxx.WelcomeActivity.onCreate(WelcomeActivity.kt:37)
  at android.app.Activity.performCreate(Activity.java:8022)
  at android.app.Activity.performCreate(Activity.java:8006)
  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309)
  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3404)
  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3595)
  at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
  at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
  at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
  at android.os.Handler.dispatchMessage(Handler.java:106)
  at android.os.Looper.loop(Looper.java:223)
  at android.app.ActivityThread.main(ActivityThread.java:7664)
  at java.lang.reflect.Method.invoke(Native method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
主要是在欢迎页加载了一个图片，造成了Anr，查看后发现这个图片是
57.47KB，尺寸为 (5760x3240) 的一张webp的图片，
这个图片大小虽然不大，但是尺寸，其实远超设备需求的，所以考虑将图片优化后再观察ANR概率。
在 Windows 环境下优化 WebP 图片，可以使用以下工具和方法：
低端设备加载webp ANR

推荐工具及使用步骤

1. 使用 Google 官方工具包 (推荐)
