How to edit /etc/hosts file in Android Studio emulator running in nougat?

问题

Anyone know how to edit /etc/hosts file inside an android studio emulator running in nougat? I will be editing it so I can use my virtual host in my local web server. I tried editing it through terminal using adb however, it is returning Read-only file system. Tried also using chmod but still it fails.

Update: I also tried pulling and pushing files using adb $ ./adb -s emulator-5554 push ~/Desktop/hosts /system/etc/hosts

adb: error: failed to copy '/Users/Christian/Desktop/hosts' to '/system/etc/hosts': couldn't create file: Read-only file system

回答1:

1) android-sdk-macosx/tools/emulator -avd <avdname> -writable-system
2) ./adb root
3) ./adb remount
4) ./adb push <local>/hosts /etc/hosts

Android file host can be

/etc/hosts <--- This worked for me
/etc/system/hosts
/system/etc/hosts

Check

1) ./adb shell
2) cat /etc/hosts
3) ping customsite.com

回答2:

Step by Step

Don’t Create the AVD with a Google Play image.
Use for example Google APIs Intel x86 Atom System Image.

Start the emulator with the following command…

emulator.exe –avd <avd name> -writable-system

For example:

    C:\Users\ilyas.mamun\AppData\Local\Android\Sdk\emulator>emulator.exe -avd Pixel_API_25 -writable-system

    emulator: WARNING: System image is writable
    HAX is working and emulator runs in fast virt mode.
    audio: Failed to create voice `goldfish_audio_in'
    qemu-system-i386.exe: warning: opening audio input failed
    audio: Failed to create voice `adc'

Root and Remount the AVD like the followings…

C:\Users\ilyas.mamun\AppData\Local\Android\Sdk\platform-tools>adb root

C:\Users\ilyas.mamun\AppData\Local\Android\Sdk\platform-tools>adb remount
remount succeeded

C:\Users\ilyas.mamun\AppData\Local\Android\Sdk\platform-tools>adb shell
eneric_x86:/ # cd system
generic_x86:/system # cd etc
generic_x86:/system/etc # cat hosts
127.0.0.1       localhost
::1             ip6-localhost

generic_x86:/system/etc # echo "192.168.1.120   ilyasmamun.blogspot.com" >> hosts
generic_x86:/system/etc # cat hosts

127.0.0.1       localhost
::1             ip6-localhost
192.168.1.120     ilyasmamun.blogspot.com
generic_x86:/system/etc #

回答3:

Here is how i was able to do it working on OSX. After reading a bunch of different instruction nothing seemd to work for me untill someone mentioned that you have a very narrow window for copying the file from your disk to the emulated device or it becomes read-only again

Start your emulator.
In your terminal find the folder "platform-tools" for your devices
Prepare the hosts file you want to copy to your device (in my case i put it on desktop)
String together a bunch of commands to copy the file quickly. This is what worked for me ./adb root && ./adb -s emulator-5554 remount && ./adb -s emulator-5554 push ~/Desktop/hosts /system/etc/hosts 'emulator-5554' is the name of my device which you can find by typing ./adb devices

after that the terminal responded with

restarting adbd as root remount succeeded [100%] /system/etc/hosts

you can veryfy the copy was successfull by ./adb shell and then cat /system/etc/hosts

I was then able to connect to my virtual hosts from the emulated device

Just to be complete here is how my hosts file looked like 10.0.2.2 my-virtual-host

I hope this helps someone as i spet quite some time trying to figure this out.

回答4:

I was able to edit the /etc/hosts file by launching the emulator with -writable-system and remounting the emulator using adb remount. After that the hosts file inside the emulator is editable. I tried pushing/replacing the file and succeeded.

回答5:

Follow the below 3 steps :

Start emulator in writable mode : ./emulator -avd <emulator_name> -writable-system
remount : adb remount
push the hosts file attached : adb push hosts /system/etc/

Note :

Run one and only one emulator_name with above steps
executable emulator is located within android-sdk. For me it was under sdk/emulator.
Attached hosts file will resolve www.facebook.com to 127.0.0.1, hence blocks www.facebook.com on emulator.

回答6:

You can use the ADB Shell to edit the file by changing the access (Read Only to RW)

回答7:

Try @P.O.W answer,

Make sure you have a blank line after the last entry of the hosts file If you use tabs in the hosts file, replace them with spaces Restart Android and try again:

adb reboot

回答8:

place all these export in z shell using terminal

vim ~/.zshrc     press enter

then zshell will open

then press i 

past all the export (verify the path i have used all default location for instalation)

then press esc

then press this :wq!  

press enter 

close terminal and open it again


export PATH="$PATH:$HOME/Dev/flutter/bin"
export GEM_HOME=$HOME/.gem
export PATH=$GEM_HOME/bin:$PATH

export ANDROID_HOME=$HOME/Library/Android/sdk
export ANDROID_SDK_ROOT=$HOME/Library/Android/sdk
export PATH=$PATH:$ANDROID_HOME/emulator
export PATH=$PATH:$ANDROID_HOME/tools
export PATH=$PATH:$ANDROID_HOME/tools/bin
export PATH=$PATH:$ANDROID_HOME/platform-tools



only use google apis image do not usese play image

u will get list of avds 
emulator -list-avds

emulator -avd Nexus_5_API_29 -writable-system  (do not close terminal) (open a new terminal)

adb root
adb remount

copy mac host file to Downloads  from  /private/etc/hosts

adb push Downloads/hosts /system/etc/hosts
adb reboot

来源：https://stackoverflow.com/questions/41117715/how-to-edit-etc-hosts-file-in-android-studio-emulator-running-in-nougat

标签

android

android-studio

android-emulator