【转】android开发中关于模拟器emulation的常见问题
Trouble:
无法启动android模拟器，提示 XDM authorization key matches an existing client!
SDL init failure, reason is: No available video device
Oneway:
打开电脑的 Terminal 终端，
以当前图形界面用户的身份执行命令 xhost localhost 即可,如果想实现登录后自动执行这个命令，可以做以下操作
点开 Applicantions Menu -> Settings -> Session and Startup
在打开的选项中点击 Application Autostart
然后点击左下方的 Add 按钮，
设置Name的值为：xhost localhost
设置Description的值为：xhost localhost
设置Command的值为：xhost localhost
点击OK，点击Close，即可
Trouble:
无法启动android模拟器，提示 emulator: ERROR: x86 emulation currently requires hardware acceleration!
Please ensure KVM is properly installed and usable.
CPU acceleration status: This user doesn't have permissions to use KVM (/dev/kvm). 或者提示
emulator: ERROR: x86 emulation currently requires hardware acceleration!
Please ensure KVM is properly installed and usable.
CPU acceleration status: Could not open /dev/kvm :Permission denied
Oneway:
使用 root 权限执行以下三条命令后注销当前用户或者直接重启电脑即可
(本例子中当前登录图形界面的用户是 sman)
groupadd kvm
usermod -G kvm -a sman
echo 'KERNEL=="kvm",GROUP="kvm",MODE="0660"' >> /etc/udev/rules.d/androidUseKVM.rules
这三条命令的作用分别是：
#创建用户组kvm
#将用户sman添加到kvm用户组
#开机时自动赋予用户组kvm拥有0660的权限
Trouble:
无法启动android模拟器，提示 Android/Sdk/tools/emulator -netdelay none -netspeed full -avd Nexus_5_API_23 libGL error: failed to load driver: i965
libGL error: Try again with LIBGL_DEBUG=verbose for more details. failed to create drawable
getGLES1ExtensionString: Could not create GLES 1.x Pbuffer!
Failed to obtain GLES 1.x extensions string!
Could not initialize emulated framebuffer
Oneway:
根据提示在Terminal中申明环境变量并在Terminal中启动模拟器 export LIBGL_DEBUG=verbose; Android/Sdk/tools/emulator -netdelay none -netspeed full -avd Nexus_5_API_23 得到提示： libGL: OpenDriver: trying /usr/lib64/xorg/modules/dri/i965_dri.so
libGL error: failed to open drm device: Permission denied
libGL error: failed to load driver: i965
libGL: OpenDriver: trying /usr/lib64/xorg/modules/dri/swrast_dri.so
libGL: OpenDriver: trying /usr/lib64/xorg/modules/dri/i965_dri.so
libGL error: failed to open drm device: Permission denied
libGL error: failed to load driver: i965
libGL: OpenDriver: trying /usr/lib64/xorg/modules/dri/swrast_dri.so
failed to create drawable
getGLES1ExtensionString: Could not create GLES 1.x Pbuffer!
Failed to obtain GLES 1.x extensions string!
Could not initialize emulated framebufferSegmentation fault 先解决第一个错误，第一个错误是没有权限使用drm设备
于是使用groups命令检查当前用户是否存在于video用户组
[sman@mnxnm:~]$ groups
users plugdev vboxusers kvm
可以看到sman不属于video用户组 于是使用root权限将当前用户sman添加到video用户组
root@mnxnm:~# usermod -G video -a sman 注销当前用户再重新登录(必须重新登录，否则用户组改动不会生效)
登录后确认sman是否成功加入video用户组
[sman@mnxnm:~]$ groups
users video plugdev vboxusers kvm
可以看到sman成功加入video用户组 再启动Android studio，再通过Android Virtual Device Manager启动模拟器
看看错误有没有消除
如果提示NAND: could not write file /tmp/android-sman/emulator-7UY28S, File exists
则 rm /tmp/android-sman/emulator-* 后再试 OK，成功启动模拟器
Trouble:
android模拟器中DNS解析正常但无法ping通外网
Oneway:
这是正常现象，因为模拟器与PC之间的网络通信是通过TCP端口转发来实现的
而ping是ICMP数据包，没有端口，故模拟器无法将ping请求送出
但是是可以正常浏览网页的 所以不能用ping来测试模拟器是否能够联网，而是用网页浏览器来测试
Trouble:
android模拟器中安装调试apk时出错，提示 Application Installation Failed
Installation failed with message INSTALL_FAILED_CONTAINER_ERROR.
It is possible that this issue is resolved by uninstalling an existing version of the apk if it is present, and then re-installing. WARNING: Uninstalling will remove the application data! Do you want to uninstall the existing application?
Oneway:
方法一：adb root
adb shell rm /mnt/secure/asec/smdl* 方法二：将项目源文件 AndroidManifest.xml 中的
android:installLocation="preferExternal"
修改成
android:installLocation="auto"
即可