Android Studio emulator: ERROR: detected a hanging thread QEMU2 main loop
Android Studio emulator: ERROR: detected a hanging thread QEMU2 main loop
我在 Ubuntu 16.04 上使用 Android Studio 3.0.1。
昨天，Android Studio 弹出一条消息，说有可用的更新，我总是点击那些。然后它通知我它已成功更新模拟器。
我的 AVD 之前运行良好，但在更新完成后，现在当我启动它时，它在模拟器中显示黑屏 window 15 秒，然后崩溃并显示以下错误消息：
ERROR: detected a hanging thread 'QEMU2 main loop'. No response for 15000 ms
Process finished with exit code 139 (interrupted by signal 11: SIGSEGV)
我尝试了所有描述类似模拟器问题的线程中建议的解决方案。 （我确认模拟器仍然通过 SDK 管理器安装，我尝试在 AVD 的软件和硬件图形设置之间切换，我尝试用更新版本 6.0.24 替换 libstdc++，我尝试改为 ln -sf my /usr/lib.. libstdc++ 6.0.21 进入 SDK 模拟器 lib64/libstdc++ 文件夹，我什至下载了 Android Studio 和 运行 全新安装，带有自己的新 SDK 文件夹，刚下载SDK，我尝试创建具有不同架构（arm）和不同 API 级别（24、27）的新 AVD，我尝试重新启动 ADB，甚至重新启动计算机。没有任何帮助。
我的 SDK 工具菜单没有模拟器加速器 (HAXM) 条目，尽管我的 PC 有 Intel CPU：我不应该更改它，因为我的 AVD 昨天才工作！什么坏了？
是什么导致 'QEMU2 main loop' 挂起，我该如何解决？
我找到了一个临时解决方法 - 确保启用了 IPv6。
$ cat /proc/sys/net/ipv6/conf/all/disable_ipv6
0
如果您看到上面的 1，请编辑您的 /etc/sysctl.conf 文件并注释掉所有 IPv6 禁用指令：
# net.ipv6.conf.all.disable_ipv6 = 1
# net.ipv6.conf.default.disable_ipv6 = 1
# net.ipv6.conf.lo.disable_ipv6 = 1
2018 年 1 月 5 日更新：至少有一位用户报告说，禁用以前启用的 IPv6 解决了他系统上的问题。在这种情况下，如果您的系统上已启用 IPv6 而模拟器未启动，您可能需要尝试反转上述步骤。
在 Ubuntu 16.04 上更新 Android SDK 后，我开始遇到完全相同的问题。可执行文件没有符号，所以我不确定如何将原始开发人员指向根本原因，但这里是线程状态：
(gdb) info threads
Id Target Id Frame
1 Thread 0x7f6d20428700 (LWP 14472) 0x00000000014e8baf in ?? ()
2 Thread 0x7f6d20c29700 (LWP 14471) syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
* 3 Thread 0x7f6d20c2ad00 (LWP 14470) 0x00007f6d258a27d1 in __GI_ppoll (fds=0x3842bf8, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:50
4 Thread 0x7f6d1d427700 (LWP 14479) pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
5 Thread 0x7f6d1649b700 (LWP 14483) pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
6 Thread 0x7f6d05fe4700 (LWP 14487) __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
7 Thread 0x7f6d16c9c700 (LWP 14482) __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
8 Thread 0x7f6d1cc26700 (LWP 14480) pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
9 Thread 0x7f6d1eda9700 (LWP 14478) 0x00007f6d258a270d in poll () at ../sysdeps/unix/syscall-template.S:84
10 Thread 0x7f6d067e5700 (LWP 14486) 0x00007f6d280107cd in connect () at ../sysdeps/unix/syscall-template.S:84
11 Thread 0x7f6d15c9a700 (LWP 14484) 0x00007f6d258a27d1 in __GI_ppoll (fds=0x7f6d10000aa0, nfds=5, timeout=<optimized out>, sigmask=0x0)
at ../sysdeps/unix/sysv/linux/ppoll.c:50
12 Thread 0x7f6cff7fe700 (LWP 14489) pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
13 Thread 0x7f6cfffff700 (LWP 14488) 0x00007f6d258a270d in poll () at ../sysdeps/unix/syscall-template.S:84
14 Thread 0x7f6cfeffd700 (LWP 14490) pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
15 Thread 0x7f6cfe7fc700 (LWP 14492) 0x00007f6d280107cd in connect () at ../sysdeps/unix/syscall-template.S:84
16 Thread 0x7f6cfdffb700 (LWP 14493) 0x00007f6d258a27d1 in __GI_ppoll (fds=0x7f6c78012818, nfds=3, timeout=<optimized out>, sigmask=0x0)
at ../sysdeps/unix/sysv/linux/ppoll.c:50
17 Thread 0x7f6c93dfe700 (LWP 14498) pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
日志输出：
emulator:Android emulator version 26.0.3.0 (build_id 3965150)
emulator:Found AVD name 'Nexus_5X_API_25'
emulator:Found AVD target architecture: x86_64
emulator:argv[0]: './emulator'; program directory: '/home/sl/opt/android-sdk/tools'
emulator: Found directory: /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64/
emulator:Probing for /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//kernel-ranchu: file exists
emulator:Auto-config: -engine qemu2 (based on configuration)
emulator: Found directory: /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64/
emulator:try dir /home/sl/opt/android-sdk/tools
emulator:try dir ./
emulator:try dir ../emulator
emulator:Found target-specific 64-bit emulator binary: /home/sl/opt/android-sdk/tools/../emulator/qemu/linux-x86_64/qemu-system-x86_64
emulator:Adding library search path: '../emulator/lib64'
emulator:Adding library search path: '../emulator/lib64/gles_swiftshader'
emulator:Adding library search path: '../emulator/lib64/gles_angle'
emulator:Adding library search path: '../emulator/lib64/gles_angle9'
emulator:Adding library search path: '../emulator/lib64/gles_angle11'
emulator:Adding library search path: '../emulator/lib64/libstdc++'
emulator: Adding library search path for Qt: '../emulator/lib64/qt/lib'
emulator: Setting Qt plugin search path: QT_QPA_PLATFORM_PLUGIN_PATH=../emulator/lib64/qt/plugins
emulator: Running :/home/sl/opt/android-sdk/tools/../emulator/qemu/linux-x86_64/qemu-system-x86_64
emulator: qemu backend: argv[00] = "/home/sl/opt/android-sdk/tools/../emulator/qemu/linux-x86_64/qemu-system-x86_64"
emulator: qemu backend: argv[01] = "-avd"
emulator: qemu backend: argv[02] = "Nexus_5X_API_25"
emulator: qemu backend: argv[03] = "-verbose"
emulator: Concatenated backend parameters:
/home/sl/opt/android-sdk/tools/../emulator/qemu/linux-x86_64/qemu-system-x86_64 -avd Nexus_5X_API_25 -verbose
emulator: Android virtual device file at: /home/sl/.android/avd/Nexus_5X_API_25.ini
emulator: virtual device content at /home/sl/.android/avd/Nexus_5X_API_25.avd
emulator: virtual device config file: /home/sl/.android/avd/Nexus_5X_API_25.avd/config.ini
emulator: using core hw config path: /home/sl/.android/avd/Nexus_5X_API_25.avd/hardware-qemu.ini
emulator: using snapshot lock path: /home/sl/.android/avd/Nexus_5X_API_25.avd/snapshot.lock
emulator: Found AVD target API level: 25
emulator: Read property file at /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//build.prop
emulator: No boot.prop property file found.
emulator: Warning: config.ini contains invalid skin.path entry: _no_skin
emulator: autoconfig: -skin 1080x1920
emulator: autoconfig: -skindir (null)
emulator: autoconfig: -kernel /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//kernel-ranchu
emulator: Target arch = 'x86_64'
emulator: Auto-detect: Kernel image requires new device naming scheme.
emulator: Auto-detect: Kernel does not support YAFFS2 partitions.
emulator: autoconfig: -ramdisk /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//ramdisk.img
emulator: Using initial system image: /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//system.img
emulator: No vendor image
emulator: autoconfig: -data /home/sl/.android/avd/Nexus_5X_API_25.avd/userdata-qemu.img
emulator: autoconfig: -initdata /home/sl/.android/avd/Nexus_5X_API_25.avd/userdata.img
emulator: autoconfig: -cache /home/sl/.android/avd/Nexus_5X_API_25.avd/cache.img
emulator: Physical RAM size: 1536MB
emulator: VM heap size 256MB is below hardware specified minimum of 384MB,setting it to that value
emulator: System image is read only
emulator: Found 1 DNS servers: 127.0.1.1
emulator: found magic skin width=1080 height=1920 bpp=16
emulator: CPU Acceleration: working
emulator: CPU Acceleration status: KVM (version 12) is installed and usable.
emulator: GPU emulation enabled using 'host' mode
emulator: Initializing hardware OpenGLES emulation support
emulator: Found 1 DNS servers: 127.0.1.1
Content of hardware configuration file:
hw.cpu.arch = x86_64
hw.cpu.ncore = 2
hw.ramSize = 1536
hw.screen = multi-touch
hw.mainKeys = false
hw.trackBall = false
hw.keyboard = true
hw.keyboard.lid = false
hw.keyboard.charmap = qwerty2
hw.dPad = false
hw.rotaryInput = false
hw.gsmModem = true
hw.gps = true
hw.battery = true
hw.accelerometer = true
hw.gyroscope = true
hw.audioInput = true
hw.audioOutput = true
hw.sdCard = false
disk.cachePartition = true
disk.cachePartition.path = /home/sl/.android/avd/Nexus_5X_API_25.avd/cache.img
disk.cachePartition.size = 66m
hw.lcd.width = 1080
hw.lcd.height = 1920
hw.lcd.depth = 16
hw.lcd.density = 420
hw.lcd.backlight = true
hw.gpu.enabled = true
hw.gpu.mode = host
hw.gpu.blacklisted = no
hw.initialOrientation = Portrait
hw.camera.back = none
hw.camera.front = none
vm.heapSize = 384
hw.sensors.light = true
hw.sensors.pressure = true
hw.sensors.humidity = true
hw.sensors.proximity = true
hw.sensors.magnetic_field = true
hw.sensors.magnetic_field_uncalibrated = true
hw.sensors.gyroscope_uncalibrated = true
hw.sensors.orientation = true
hw.sensors.temperature = true
hw.useext4 = true
hw.arc = false
hw.arc.autologin = false
kernel.path = /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//kernel-ranchu
kernel.newDeviceNaming = yes
kernel.supportsYaffs2 = no
disk.ramdisk.path = /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//ramdisk.img
disk.systemPartition.initPath = /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//system.img
disk.systemPartition.size = 2765m
disk.vendorPartition.size = 0
disk.dataPartition.path = /home/sl/.android/avd/Nexus_5X_API_25.avd/userdata-qemu.img
disk.dataPartition.size = 800m
disk.encryptionKeyPartition.path = /home/sl/.android/avd/Nexus_5X_API_25.avd/encryptionkey.img
PlayStore.enabled = false
avd.name = Nexus_5X_API_25
fastboot.forceColdBoot = false
.
QEMU options list:
emulator: argv[00] = "/home/sl/opt/android-sdk/tools/../emulator/qemu/linux-x86_64/qemu-system-x86_64"
emulator: argv[01] = "-dns-server"
emulator: argv[02] = "127.0.1.1"
emulator: argv[03] = "-serial"
emulator: argv[04] = "null"
emulator: argv[05] = "-device"
emulator: argv[06] = "goldfish_pstore,addr=0xff018000,size=0x10000,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/data/misc/pstore/pstore.bin"
emulator: argv[07] = "-cpu"
emulator: argv[08] = "android64"
emulator: argv[09] = "-enable-kvm"
emulator: argv[10] = "-smp"
emulator: argv[11] = "cores=2"
emulator: argv[12] = "-m"
emulator: argv[13] = "1536"
emulator: argv[14] = "-lcd-density"
emulator: argv[15] = "420"
emulator: argv[16] = "-object"
emulator: argv[17] = "iothread,id=disk-iothread"
emulator: argv[18] = "-nodefaults"
emulator: argv[19] = "-kernel"
emulator: argv[20] = "/home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//kernel-ranchu"
emulator: argv[21] = "-initrd"
emulator: argv[22] = "/home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//ramdisk.img"
emulator: argv[23] = "-drive"
emulator: argv[24] = "if=none,index=0,id=system,file=/home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//system.img,read-only"
emulator: argv[25] = "-device"
emulator: argv[26] = "virtio-blk-pci,drive=system,iothread=disk-iothread,modern-pio-notify"
emulator: argv[27] = "-drive"
emulator: argv[28] = "if=none,index=1,id=cache,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/cache.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576"
emulator: argv[29] = "-device"
emulator: argv[30] = "virtio-blk-pci,drive=cache,iothread=disk-iothread,modern-pio-notify"
emulator: argv[31] = "-drive"
emulator: argv[32] = "if=none,index=2,id=userdata,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/userdata-qemu.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576"
emulator: argv[33] = "-device"
emulator: argv[34] = "virtio-blk-pci,drive=userdata,iothread=disk-iothread,modern-pio-notify"
emulator: argv[35] = "-drive"
emulator: argv[36] = "if=none,index=3,id=encrypt,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/encryptionkey.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576"
emulator: argv[37] = "-device"
emulator: argv[38] = "virtio-blk-pci,drive=encrypt,iothread=disk-iothread,modern-pio-notify"
emulator: argv[39] = "-netdev"
emulator: argv[40] = "user,id=mynet"
emulator: argv[41] = "-device"
emulator: argv[42] = "virtio-net-pci,netdev=mynet"
emulator: argv[43] = "-show-cursor"
emulator: argv[44] = "-L"
emulator: argv[45] = "/home/sl/opt/android-sdk/emulator/lib/pc-bios"
emulator: argv[46] = "-soundhw"
emulator: argv[47] = "hda"
emulator: argv[48] = "-vga"
emulator: argv[49] = "none"
emulator: argv[50] = "-append"
emulator: argv[51] = "qemu=1 androidboot.hardware=ranchu clocksource=pit android.qemud=1 console=0 android.checkjni=1 qemu.gles=1 qemu.encrypt=1 qemu.opengles.version=131072 cma=288M qemu.wifi=1 mac80211_hwsim.channels=2 androidboot.android_dt_dir=/sys/bus/platform/devices/ANDR0001:00/properties/android/ ramoops.mem_address=0xff018000 ramoops.mem_size=0x10000 memmap=0x10000[=13=]xff018000"
emulator: argv[52] = "-android-hw"
emulator: argv[53] = "/home/sl/.android/avd/Nexus_5X_API_25.avd/hardware-qemu.ini"
Concatenated QEMU options:
/home/sl/opt/android-sdk/tools/../emulator/qemu/linux-x86_64/qemu-system-x86_64 -dns-server 127.0.1.1 -serial null -device goldfish_pstore,addr=0xff018000,size=0x10000,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/data/misc/pstore/pstore.bin -cpu android64 -enable-kvm -smp cores=2 -m 1536 -lcd-density 420 -object iothread,id=disk-iothread -nodefaults -kernel /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//kernel-ranchu -initrd /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//ramdisk.img -drive if=none,index=0,id=system,file=/home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//system.img,read-only -device virtio-blk-pci,drive=system,iothread=disk-iothread,modern-pio-notify -drive if=none,index=1,id=cache,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/cache.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576 -device virtio-blk-pci,drive=cache,iothread=disk-iothread,modern-pio-notify -drive if=none,index=2,id=userdata,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/userdata-qemu.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576 -device virtio-blk-pci,drive=userdata,iothread=disk-iothread,modern-pio-notify -drive if=none,index=3,id=encrypt,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/encryptionkey.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576 -device virtio-blk-pci,drive=encrypt,iothread=disk-iothread,modern-pio-notify -netdev user,id=mynet -device virtio-net-pci,netdev=mynet -show-cursor -L /home/sl/opt/android-sdk/emulator/lib/pc-bios -soundhw hda -vga none -append 'qemu=1 androidboot.hardware=ranchu clocksource=pit android.qemud=1 console=0 android.checkjni=1 qemu.gles=1 qemu.encrypt=1 qemu.opengles.version=131072 cma=288M qemu.wifi=1 mac80211_hwsim.channels=2 androidboot.android_dt_dir=/sys/bus/platform/devices/ANDR0001:00/properties/android/ ramoops.mem_address=0xff018000 ramoops.mem_size=0x10000 memmap=0x10000[=13=]xff018000' -android-hw /home/sl/.android/avd/Nexus_5X_API_25.avd/hardware-qemu.ini
emulator: Android qemu version 27.0.2.0 (build_id 4498654) (CL:f388734068bae38c6115263feea33c68eed531fe)
emulator: Starting QEMU main loop
emulator: registered 'boot-properties' qemud service
emulator: Adding boot property: 'ro.opengles.version' = '131072'
emulator: Adding boot property: 'qemu.sf.fake_camera' = 'none'
emulator: Adding boot property: 'dalvik.vm.heapsize' = '384m'
emulator: Adding boot property: 'qemu.hw.mainkeys' = '0'
emulator: Adding boot property: 'qemu.sf.lcd_density' = '420'
emulator: goldfish_events.have-dpad: false
emulator: goldfish_events.have-trackball: false
emulator: goldfish_events.have-camera: false
emulator: goldfish_events.have-keyboard: true
emulator: goldfish_events.have-lidswitch: false
emulator: goldfish_events.have-tabletmode: false
emulator: goldfish_events.have-touch: false
emulator: goldfish_events.have-multitouch: true
emulator: control console listening on port 5554, ADB on port 5555
Not using any http proxy
emulator: android_hw_fingerprint_init: fingerprint qemud listen service initialized
emulator: Warning: config.ini contains invalid skin.path entry: _no_skin
emulator: ERROR: detected a hanging thread 'QEMU2 main loop'. No response for 15000 ms
我在 ubuntu 16.04 和 android studio 3.0.1
中遇到了完全相同的问题
使用谷歌搜索此错误消息后：
ADB rejected shell command (getprop): closed
我在 the Arch forumn 中找到了一位讨论该错误的用户。
一个简单的解决方案是：单击 AS 中的 AVD 管理器 > 单击使用铅笔图标编辑此 AVD > 在图形下拉菜单中选择软件。
此模式可能会导致模拟器速度降低，但可以作为该问题的临时解决方案。
在工具->AVD->编辑->高级设置中。选择快速启动而不是冷启动
我是 运行 Android Windows Studio 3.01。
不知道跟这个有没有关系。我收到了同样的错误信息：
Android Studio 模拟器：错误：检测到线程挂起 QEMU2 主循环
我试了一下这个语句。这是我得到的痕迹：
Process: com.abc.abc, PID: 4620
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.abc.abc/com.abc.abc.CheckRegistration}: android.view.InflateException: Binary XML file line #0: Binary XML file line #0:
您必须提供 layout_width 属性。
我在上面的消息中用 abc 替换了我的域。
我将布局宽度从“wrap_content”更改为特定宽度 123dp。此更改解决了我的问题。
伙计们放轻松！
实际可能出现挂起状态
- 在模拟器启动时
- 运行期间
这可能是在
之后
更新包
当您将项目导入或打开更高版本的 android studio 时，例如
2.4 -> 3.0.1 等
主要原因是你以前的应用程序的状态是用以前的库和包保存的android工作室，所以解决这个错误很容易，即
a) 工具->AVD->编辑->高级设置。选择快速启动而不是冷启动
（由 Kamel 回答）
或
b) 如果您已经选择了 'Quick boot' 然后选择 'Cold boot'，然后重新启动
模拟器，它会工作正常。
这对我有用：
我已经转到工具->AVD 管理器->编辑（特定模拟器）>显示高级设置
然后在“模拟性能”部分我选择了“快速启动”，我将其更改为“冷启动”并且一切正常。
希望对您有所帮助。
Enabling/disabling ipv6 协议在 macOS 上也可以工作，以防 off 选项没有出现在 Configure IPv6 下拉列表中（就像在 macOS 中一样） 10.14)，您可以在终端中执行以下命令：
networksetup -setv6off Ethernet && networksetup -setv6off Wi-Fi
要仅 select 配置 IPv6 下拉列表中的前一个 selected 选项或执行其他命令：
networksetup -setv6automatic Wi-Fi && networksetup -setv6automatic Ethernet
开启：
$ cat /etc/os-release
NAME="Ubuntu"
VERSION="14.04.5 LTS, Trusty Tahr"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 14.04.5 LTS"
VERSION_ID="14.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
要将 disable_ipv6 的值从 1 设置为 0，以下对我有用：
$ cat /proc/sys/net/ipv6/conf/all/disable_ipv6
1
$ sudo sysctl net.ipv6.conf.all.disable_ipv6=0
net.ipv6.conf.all.disable_ipv6 = 0
$ cat /proc/sys/net/ipv6/conf/all/disable_ipv6
0
转到 工具 => AVD 管理器 select 您要打开的虚拟设备按笔图标 （编辑此 AVD）
Select 显示高级设置
Select 启动选项：冷启动
我已经解决了这个问题。
只需检查您的 SDK 管理器是否有可用的更新。如果是，则更新 AVD 管理器和 SDK 工具。
然后开始你的AVD。它会像以前一样工作。
直到 2020 年 12 月 1 日，我们非常高兴地 运行在 28 核机器上安装了 27 个仿真器，然后它们突然开始 运行 缓慢地启动，平均负载降低了 1.5 到 2 倍，并且这些 QEMU消息，偶尔几天恢复正常。另一个团队也在他们的模拟器上 运行ning Android 10 在他们完全不相关的系统上也发现了同样的性能问题。 Android11和Pie不受影响
我们的模拟器容器是用标准的 avdmanager 创建的 AVD 和一个机器快照制作成 docker 个图像，每个图像一个模拟器，我们唤醒了几个这样的容器。
我们仍然不完全了解原因，但我们似乎已经通过禁用 AVD 内部的各种设置和应用程序解决了这个问题；没有这些修复的快照图像仍然表现不佳。我们不确定实际上是哪一个修复了它，所以我会在这里列出所有内容，即使它看起来不太可能做出贡献；如果我们确实确定了这一点，我会更新这个答案：
- 512M sdcard（avdmanager 的 -c 选项）
- pm 撤销 RECORD_AUDIO 快速搜索 (googlequicksearchbox = Velvet)
- su root pm 禁用 com.google.android.googlequicksearchbox
- su root pm 禁用 com.google.android.music
- 设置 > 安全 > 播放保护 > 禁用扫描设备
- 应用信息 > 播放服务 > 清除存储，清除缓存，强制停止
- 应用信息 > Google 自动 > 禁用
- 短暂打开地图，跳过登录，点击'zoom to location'
- 正常 'dismiss first time user' 类似：
-
- 授予相机权限，不保存位置
-
- 不共享任何统计数据或登录（=不，谢谢）Chrome，强制关闭它以尝试激活数据保护屏幕，并开始 Chrome 备份。
- 此外，Chrome > 设置 > 精简模式 > 打开、关闭
-
- 然后点击文本 window 调出键盘，清除 'help build a better keyboard' 内容。
-
- 正在检查 data/data/com.google.android.inputmethod.latin/shared_prefs/com.googe.android.inputmethod.latin_preferences.xml 中的恶语 - 我们在构建 '让我们再试一次'图片。
- 不小心点击了快速搜索小部件并启用了它；再次禁用它。
- 我们还花了几个小时来做这件事——以防它在我们停止模拟器并让它拍摄快照之前下载了一些东西。
我们仍然发现 Android 10 和 Android 11 运行 比 Pie 慢 10%，即使有这些问题。
我在 Ubuntu 16.04 上使用 Android Studio 3.0.1。
昨天，Android Studio 弹出一条消息，说有可用的更新，我总是点击那些。然后它通知我它已成功更新模拟器。
我的 AVD 之前运行良好，但在更新完成后，现在当我启动它时，它在模拟器中显示黑屏 window 15 秒，然后崩溃并显示以下错误消息：
ERROR: detected a hanging thread 'QEMU2 main loop'. No response for 15000 ms
Process finished with exit code 139 (interrupted by signal 11: SIGSEGV)
我尝试了所有描述类似模拟器问题的线程中建议的解决方案。 （我确认模拟器仍然通过 SDK 管理器安装，我尝试在 AVD 的软件和硬件图形设置之间切换，我尝试用更新版本 6.0.24 替换 libstdc++，我尝试改为 ln -sf my /usr/lib.. libstdc++ 6.0.21 进入 SDK 模拟器 lib64/libstdc++ 文件夹，我什至下载了 Android Studio 和 运行 全新安装，带有自己的新 SDK 文件夹，刚下载SDK，我尝试创建具有不同架构（arm）和不同 API 级别（24、27）的新 AVD，我尝试重新启动 ADB，甚至重新启动计算机。没有任何帮助。
我的 SDK 工具菜单没有模拟器加速器 (HAXM) 条目，尽管我的 PC 有 Intel CPU：我不应该更改它，因为我的 AVD 昨天才工作！什么坏了？
是什么导致 'QEMU2 main loop' 挂起，我该如何解决？
我找到了一个临时解决方法 - 确保启用了 IPv6。
$ cat /proc/sys/net/ipv6/conf/all/disable_ipv6
0
如果您看到上面的 1，请编辑您的 /etc/sysctl.conf 文件并注释掉所有 IPv6 禁用指令：
# net.ipv6.conf.all.disable_ipv6 = 1
# net.ipv6.conf.default.disable_ipv6 = 1
# net.ipv6.conf.lo.disable_ipv6 = 1
2018 年 1 月 5 日更新：至少有一位用户报告说，禁用以前启用的 IPv6 解决了他系统上的问题。在这种情况下，如果您的系统上已启用 IPv6 而模拟器未启动，您可能需要尝试反转上述步骤。
在 Ubuntu 16.04 上更新 Android SDK 后，我开始遇到完全相同的问题。可执行文件没有符号，所以我不确定如何将原始开发人员指向根本原因，但这里是线程状态：
(gdb) info threads
Id Target Id Frame
1 Thread 0x7f6d20428700 (LWP 14472) 0x00000000014e8baf in ?? ()
2 Thread 0x7f6d20c29700 (LWP 14471) syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
* 3 Thread 0x7f6d20c2ad00 (LWP 14470) 0x00007f6d258a27d1 in __GI_ppoll (fds=0x3842bf8, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:50
4 Thread 0x7f6d1d427700 (LWP 14479) pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
5 Thread 0x7f6d1649b700 (LWP 14483) pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
6 Thread 0x7f6d05fe4700 (LWP 14487) __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
7 Thread 0x7f6d16c9c700 (LWP 14482) __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
8 Thread 0x7f6d1cc26700 (LWP 14480) pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
9 Thread 0x7f6d1eda9700 (LWP 14478) 0x00007f6d258a270d in poll () at ../sysdeps/unix/syscall-template.S:84
10 Thread 0x7f6d067e5700 (LWP 14486) 0x00007f6d280107cd in connect () at ../sysdeps/unix/syscall-template.S:84
11 Thread 0x7f6d15c9a700 (LWP 14484) 0x00007f6d258a27d1 in __GI_ppoll (fds=0x7f6d10000aa0, nfds=5, timeout=<optimized out>, sigmask=0x0)
at ../sysdeps/unix/sysv/linux/ppoll.c:50
12 Thread 0x7f6cff7fe700 (LWP 14489) pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
13 Thread 0x7f6cfffff700 (LWP 14488) 0x00007f6d258a270d in poll () at ../sysdeps/unix/syscall-template.S:84
14 Thread 0x7f6cfeffd700 (LWP 14490) pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
15 Thread 0x7f6cfe7fc700 (LWP 14492) 0x00007f6d280107cd in connect () at ../sysdeps/unix/syscall-template.S:84
16 Thread 0x7f6cfdffb700 (LWP 14493) 0x00007f6d258a27d1 in __GI_ppoll (fds=0x7f6c78012818, nfds=3, timeout=<optimized out>, sigmask=0x0)
at ../sysdeps/unix/sysv/linux/ppoll.c:50
17 Thread 0x7f6c93dfe700 (LWP 14498) pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
日志输出：
emulator:Android emulator version 26.0.3.0 (build_id 3965150)
emulator:Found AVD name 'Nexus_5X_API_25'
emulator:Found AVD target architecture: x86_64
emulator:argv[0]: './emulator'; program directory: '/home/sl/opt/android-sdk/tools'
emulator: Found directory: /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64/
emulator:Probing for /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//kernel-ranchu: file exists
emulator:Auto-config: -engine qemu2 (based on configuration)
emulator: Found directory: /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64/
emulator:try dir /home/sl/opt/android-sdk/tools
emulator:try dir ./
emulator:try dir ../emulator
emulator:Found target-specific 64-bit emulator binary: /home/sl/opt/android-sdk/tools/../emulator/qemu/linux-x86_64/qemu-system-x86_64
emulator:Adding library search path: '../emulator/lib64'
emulator:Adding library search path: '../emulator/lib64/gles_swiftshader'
emulator:Adding library search path: '../emulator/lib64/gles_angle'
emulator:Adding library search path: '../emulator/lib64/gles_angle9'
emulator:Adding library search path: '../emulator/lib64/gles_angle11'
emulator:Adding library search path: '../emulator/lib64/libstdc++'
emulator: Adding library search path for Qt: '../emulator/lib64/qt/lib'
emulator: Setting Qt plugin search path: QT_QPA_PLATFORM_PLUGIN_PATH=../emulator/lib64/qt/plugins
emulator: Running :/home/sl/opt/android-sdk/tools/../emulator/qemu/linux-x86_64/qemu-system-x86_64
emulator: qemu backend: argv[00] = "/home/sl/opt/android-sdk/tools/../emulator/qemu/linux-x86_64/qemu-system-x86_64"
emulator: qemu backend: argv[01] = "-avd"
emulator: qemu backend: argv[02] = "Nexus_5X_API_25"
emulator: qemu backend: argv[03] = "-verbose"
emulator: Concatenated backend parameters:
/home/sl/opt/android-sdk/tools/../emulator/qemu/linux-x86_64/qemu-system-x86_64 -avd Nexus_5X_API_25 -verbose
emulator: Android virtual device file at: /home/sl/.android/avd/Nexus_5X_API_25.ini
emulator: virtual device content at /home/sl/.android/avd/Nexus_5X_API_25.avd
emulator: virtual device config file: /home/sl/.android/avd/Nexus_5X_API_25.avd/config.ini
emulator: using core hw config path: /home/sl/.android/avd/Nexus_5X_API_25.avd/hardware-qemu.ini
emulator: using snapshot lock path: /home/sl/.android/avd/Nexus_5X_API_25.avd/snapshot.lock
emulator: Found AVD target API level: 25
emulator: Read property file at /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//build.prop
emulator: No boot.prop property file found.
emulator: Warning: config.ini contains invalid skin.path entry: _no_skin
emulator: autoconfig: -skin 1080x1920
emulator: autoconfig: -skindir (null)
emulator: autoconfig: -kernel /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//kernel-ranchu
emulator: Target arch = 'x86_64'
emulator: Auto-detect: Kernel image requires new device naming scheme.
emulator: Auto-detect: Kernel does not support YAFFS2 partitions.
emulator: autoconfig: -ramdisk /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//ramdisk.img
emulator: Using initial system image: /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//system.img
emulator: No vendor image
emulator: autoconfig: -data /home/sl/.android/avd/Nexus_5X_API_25.avd/userdata-qemu.img
emulator: autoconfig: -initdata /home/sl/.android/avd/Nexus_5X_API_25.avd/userdata.img
emulator: autoconfig: -cache /home/sl/.android/avd/Nexus_5X_API_25.avd/cache.img
emulator: Physical RAM size: 1536MB
emulator: VM heap size 256MB is below hardware specified minimum of 384MB,setting it to that value
emulator: System image is read only
emulator: Found 1 DNS servers: 127.0.1.1
emulator: found magic skin width=1080 height=1920 bpp=16
emulator: CPU Acceleration: working
emulator: CPU Acceleration status: KVM (version 12) is installed and usable.
emulator: GPU emulation enabled using 'host' mode
emulator: Initializing hardware OpenGLES emulation support
emulator: Found 1 DNS servers: 127.0.1.1
Content of hardware configuration file:
hw.cpu.arch = x86_64
hw.cpu.ncore = 2
hw.ramSize = 1536
hw.screen = multi-touch
hw.mainKeys = false
hw.trackBall = false
hw.keyboard = true
hw.keyboard.lid = false
hw.keyboard.charmap = qwerty2
hw.dPad = false
hw.rotaryInput = false
hw.gsmModem = true
hw.gps = true
hw.battery = true
hw.accelerometer = true
hw.gyroscope = true
hw.audioInput = true
hw.audioOutput = true
hw.sdCard = false
disk.cachePartition = true
disk.cachePartition.path = /home/sl/.android/avd/Nexus_5X_API_25.avd/cache.img
disk.cachePartition.size = 66m
hw.lcd.width = 1080
hw.lcd.height = 1920
hw.lcd.depth = 16
hw.lcd.density = 420
hw.lcd.backlight = true
hw.gpu.enabled = true
hw.gpu.mode = host
hw.gpu.blacklisted = no
hw.initialOrientation = Portrait
hw.camera.back = none
hw.camera.front = none
vm.heapSize = 384
hw.sensors.light = true
hw.sensors.pressure = true
hw.sensors.humidity = true
hw.sensors.proximity = true
hw.sensors.magnetic_field = true
hw.sensors.magnetic_field_uncalibrated = true
hw.sensors.gyroscope_uncalibrated = true
hw.sensors.orientation = true
hw.sensors.temperature = true
hw.useext4 = true
hw.arc = false
hw.arc.autologin = false
kernel.path = /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//kernel-ranchu
kernel.newDeviceNaming = yes
kernel.supportsYaffs2 = no
disk.ramdisk.path = /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//ramdisk.img
disk.systemPartition.initPath = /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//system.img
disk.systemPartition.size = 2765m
disk.vendorPartition.size = 0
disk.dataPartition.path = /home/sl/.android/avd/Nexus_5X_API_25.avd/userdata-qemu.img
disk.dataPartition.size = 800m
disk.encryptionKeyPartition.path = /home/sl/.android/avd/Nexus_5X_API_25.avd/encryptionkey.img
PlayStore.enabled = false
avd.name = Nexus_5X_API_25
fastboot.forceColdBoot = false
.
QEMU options list:
emulator: argv[00] = "/home/sl/opt/android-sdk/tools/../emulator/qemu/linux-x86_64/qemu-system-x86_64"
emulator: argv[01] = "-dns-server"
emulator: argv[02] = "127.0.1.1"
emulator: argv[03] = "-serial"
emulator: argv[04] = "null"
emulator: argv[05] = "-device"
emulator: argv[06] = "goldfish_pstore,addr=0xff018000,size=0x10000,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/data/misc/pstore/pstore.bin"
emulator: argv[07] = "-cpu"
emulator: argv[08] = "android64"
emulator: argv[09] = "-enable-kvm"
emulator: argv[10] = "-smp"
emulator: argv[11] = "cores=2"
emulator: argv[12] = "-m"
emulator: argv[13] = "1536"
emulator: argv[14] = "-lcd-density"
emulator: argv[15] = "420"
emulator: argv[16] = "-object"
emulator: argv[17] = "iothread,id=disk-iothread"
emulator: argv[18] = "-nodefaults"
emulator: argv[19] = "-kernel"
emulator: argv[20] = "/home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//kernel-ranchu"
emulator: argv[21] = "-initrd"
emulator: argv[22] = "/home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//ramdisk.img"
emulator: argv[23] = "-drive"
emulator: argv[24] = "if=none,index=0,id=system,file=/home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//system.img,read-only"
emulator: argv[25] = "-device"
emulator: argv[26] = "virtio-blk-pci,drive=system,iothread=disk-iothread,modern-pio-notify"
emulator: argv[27] = "-drive"
emulator: argv[28] = "if=none,index=1,id=cache,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/cache.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576"
emulator: argv[29] = "-device"
emulator: argv[30] = "virtio-blk-pci,drive=cache,iothread=disk-iothread,modern-pio-notify"
emulator: argv[31] = "-drive"
emulator: argv[32] = "if=none,index=2,id=userdata,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/userdata-qemu.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576"
emulator: argv[33] = "-device"
emulator: argv[34] = "virtio-blk-pci,drive=userdata,iothread=disk-iothread,modern-pio-notify"
emulator: argv[35] = "-drive"
emulator: argv[36] = "if=none,index=3,id=encrypt,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/encryptionkey.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576"
emulator: argv[37] = "-device"
emulator: argv[38] = "virtio-blk-pci,drive=encrypt,iothread=disk-iothread,modern-pio-notify"
emulator: argv[39] = "-netdev"
emulator: argv[40] = "user,id=mynet"
emulator: argv[41] = "-device"
emulator: argv[42] = "virtio-net-pci,netdev=mynet"
emulator: argv[43] = "-show-cursor"
emulator: argv[44] = "-L"
emulator: argv[45] = "/home/sl/opt/android-sdk/emulator/lib/pc-bios"
emulator: argv[46] = "-soundhw"
emulator: argv[47] = "hda"
emulator: argv[48] = "-vga"
emulator: argv[49] = "none"
emulator: argv[50] = "-append"
emulator: argv[51] = "qemu=1 androidboot.hardware=ranchu clocksource=pit android.qemud=1 console=0 android.checkjni=1 qemu.gles=1 qemu.encrypt=1 qemu.opengles.version=131072 cma=288M qemu.wifi=1 mac80211_hwsim.channels=2 androidboot.android_dt_dir=/sys/bus/platform/devices/ANDR0001:00/properties/android/ ramoops.mem_address=0xff018000 ramoops.mem_size=0x10000 memmap=0x10000[=13=]xff018000"
emulator: argv[52] = "-android-hw"
emulator: argv[53] = "/home/sl/.android/avd/Nexus_5X_API_25.avd/hardware-qemu.ini"
Concatenated QEMU options:
/home/sl/opt/android-sdk/tools/../emulator/qemu/linux-x86_64/qemu-system-x86_64 -dns-server 127.0.1.1 -serial null -device goldfish_pstore,addr=0xff018000,size=0x10000,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/data/misc/pstore/pstore.bin -cpu android64 -enable-kvm -smp cores=2 -m 1536 -lcd-density 420 -object iothread,id=disk-iothread -nodefaults -kernel /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//kernel-ranchu -initrd /home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//ramdisk.img -drive if=none,index=0,id=system,file=/home/sl/opt/android-sdk/system-images/android-25/google_apis/x86_64//system.img,read-only -device virtio-blk-pci,drive=system,iothread=disk-iothread,modern-pio-notify -drive if=none,index=1,id=cache,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/cache.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576 -device virtio-blk-pci,drive=cache,iothread=disk-iothread,modern-pio-notify -drive if=none,index=2,id=userdata,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/userdata-qemu.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576 -device virtio-blk-pci,drive=userdata,iothread=disk-iothread,modern-pio-notify -drive if=none,index=3,id=encrypt,file=/home/sl/.android/avd/Nexus_5X_API_25.avd/encryptionkey.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576 -device virtio-blk-pci,drive=encrypt,iothread=disk-iothread,modern-pio-notify -netdev user,id=mynet -device virtio-net-pci,netdev=mynet -show-cursor -L /home/sl/opt/android-sdk/emulator/lib/pc-bios -soundhw hda -vga none -append 'qemu=1 androidboot.hardware=ranchu clocksource=pit android.qemud=1 console=0 android.checkjni=1 qemu.gles=1 qemu.encrypt=1 qemu.opengles.version=131072 cma=288M qemu.wifi=1 mac80211_hwsim.channels=2 androidboot.android_dt_dir=/sys/bus/platform/devices/ANDR0001:00/properties/android/ ramoops.mem_address=0xff018000 ramoops.mem_size=0x10000 memmap=0x10000[=13=]xff018000' -android-hw /home/sl/.android/avd/Nexus_5X_API_25.avd/hardware-qemu.ini
emulator: Android qemu version 27.0.2.0 (build_id 4498654) (CL:f388734068bae38c6115263feea33c68eed531fe)
emulator: Starting QEMU main loop
emulator: registered 'boot-properties' qemud service
emulator: Adding boot property: 'ro.opengles.version' = '131072'
emulator: Adding boot property: 'qemu.sf.fake_camera' = 'none'
emulator: Adding boot property: 'dalvik.vm.heapsize' = '384m'
emulator: Adding boot property: 'qemu.hw.mainkeys' = '0'
emulator: Adding boot property: 'qemu.sf.lcd_density' = '420'
emulator: goldfish_events.have-dpad: false
emulator: goldfish_events.have-trackball: false
emulator: goldfish_events.have-camera: false
emulator: goldfish_events.have-keyboard: true
emulator: goldfish_events.have-lidswitch: false
emulator: goldfish_events.have-tabletmode: false
emulator: goldfish_events.have-touch: false
emulator: goldfish_events.have-multitouch: true
emulator: control console listening on port 5554, ADB on port 5555
Not using any http proxy
emulator: android_hw_fingerprint_init: fingerprint qemud listen service initialized
emulator: Warning: config.ini contains invalid skin.path entry: _no_skin
emulator: ERROR: detected a hanging thread 'QEMU2 main loop'. No response for 15000 ms
我在 ubuntu 16.04 和 android studio 3.0.1
中遇到了完全相同的问题使用谷歌搜索此错误消息后：
ADB rejected shell command (getprop): closed
我在 the Arch forumn 中找到了一位讨论该错误的用户。
一个简单的解决方案是：单击 AS 中的 AVD 管理器 > 单击使用铅笔图标编辑此 AVD > 在图形下拉菜单中选择软件。
此模式可能会导致模拟器速度降低，但可以作为该问题的临时解决方案。
在工具->AVD->编辑->高级设置中。选择快速启动而不是冷启动
我是 运行 Android Windows Studio 3.01。
不知道跟这个有没有关系。我收到了同样的错误信息：
Android Studio 模拟器：错误：检测到线程挂起 QEMU2 主循环
我试了一下这个语句。这是我得到的痕迹：
Process: com.abc.abc, PID: 4620
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.abc.abc/com.abc.abc.CheckRegistration}: android.view.InflateException: Binary XML file line #0: Binary XML file line #0:
您必须提供 layout_width 属性。
我在上面的消息中用 abc 替换了我的域。
我将布局宽度从“wrap_content”更改为特定宽度 123dp。此更改解决了我的问题。
伙计们放轻松！
实际可能出现挂起状态
- 在模拟器启动时
- 运行期间
这可能是在
之后更新包
当您将项目导入或打开更高版本的 android studio 时，例如 2.4 -> 3.0.1 等 主要原因是你以前的应用程序的状态是用以前的库和包保存的android工作室，所以解决这个错误很容易，即
a) 工具->AVD->编辑->高级设置。选择快速启动而不是冷启动 （由 Kamel 回答）
或
b) 如果您已经选择了 'Quick boot' 然后选择 'Cold boot'，然后重新启动 模拟器，它会工作正常。
这对我有用：
我已经转到工具->AVD 管理器->编辑（特定模拟器）>显示高级设置
然后在“模拟性能”部分我选择了“快速启动”，我将其更改为“冷启动”并且一切正常。
希望对您有所帮助。
Enabling/disabling ipv6 协议在 macOS 上也可以工作，以防 off 选项没有出现在 Configure IPv6 下拉列表中（就像在 macOS 中一样） 10.14)，您可以在终端中执行以下命令：
networksetup -setv6off Ethernet && networksetup -setv6off Wi-Fi
要仅 select 配置 IPv6 下拉列表中的前一个 selected 选项或执行其他命令：
networksetup -setv6automatic Wi-Fi && networksetup -setv6automatic Ethernet
开启：
$ cat /etc/os-release
NAME="Ubuntu"
VERSION="14.04.5 LTS, Trusty Tahr"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 14.04.5 LTS"
VERSION_ID="14.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
要将 disable_ipv6 的值从 1 设置为 0，以下对我有用：
$ cat /proc/sys/net/ipv6/conf/all/disable_ipv6
1
$ sudo sysctl net.ipv6.conf.all.disable_ipv6=0
net.ipv6.conf.all.disable_ipv6 = 0
$ cat /proc/sys/net/ipv6/conf/all/disable_ipv6
0
转到 工具 => AVD 管理器 select 您要打开的虚拟设备按笔图标 （编辑此 AVD）
Select 显示高级设置
Select 启动选项：冷启动
我已经解决了这个问题。 只需检查您的 SDK 管理器是否有可用的更新。如果是，则更新 AVD 管理器和 SDK 工具。 然后开始你的AVD。它会像以前一样工作。
直到 2020 年 12 月 1 日，我们非常高兴地 运行在 28 核机器上安装了 27 个仿真器，然后它们突然开始 运行 缓慢地启动，平均负载降低了 1.5 到 2 倍，并且这些 QEMU消息，偶尔几天恢复正常。另一个团队也在他们的模拟器上 运行ning Android 10 在他们完全不相关的系统上也发现了同样的性能问题。 Android11和Pie不受影响
我们的模拟器容器是用标准的 avdmanager 创建的 AVD 和一个机器快照制作成 docker 个图像，每个图像一个模拟器，我们唤醒了几个这样的容器。
我们仍然不完全了解原因，但我们似乎已经通过禁用 AVD 内部的各种设置和应用程序解决了这个问题；没有这些修复的快照图像仍然表现不佳。我们不确定实际上是哪一个修复了它，所以我会在这里列出所有内容，即使它看起来不太可能做出贡献；如果我们确实确定了这一点，我会更新这个答案：
- 512M sdcard（avdmanager 的 -c 选项）
- pm 撤销 RECORD_AUDIO 快速搜索 (googlequicksearchbox = Velvet)
- su root pm 禁用 com.google.android.googlequicksearchbox
- su root pm 禁用 com.google.android.music
- 设置 > 安全 > 播放保护 > 禁用扫描设备
- 应用信息 > 播放服务 > 清除存储，清除缓存，强制停止
- 应用信息 > Google 自动 > 禁用
- 短暂打开地图，跳过登录，点击'zoom to location'
- 正常 'dismiss first time user' 类似：
-
- 授予相机权限，不保存位置
-
- 不共享任何统计数据或登录（=不，谢谢）Chrome，强制关闭它以尝试激活数据保护屏幕，并开始 Chrome 备份。
- 此外，Chrome > 设置 > 精简模式 > 打开、关闭
-
- 然后点击文本 window 调出键盘，清除 'help build a better keyboard' 内容。
-
- 正在检查 data/data/com.google.android.inputmethod.latin/shared_prefs/com.googe.android.inputmethod.latin_preferences.xml 中的恶语 - 我们在构建 '让我们再试一次'图片。
- 不小心点击了快速搜索小部件并启用了它；再次禁用它。
- 我们还花了几个小时来做这件事——以防它在我们停止模拟器并让它拍摄快照之前下载了一些东西。
我们仍然发现 Android 10 和 Android 11 运行 比 Pie 慢 10%，即使有这些问题。