Develop Reference

Which Android Emulator image do contain 'su'?

How to know which Emulator image will contain su?
I can see that often it only contains su or google play

Run adb root and you get a root shell ... otherwise su needs to be manually installed.
However, when already having a root shell available, installing it isn't much of a problem.
All images are rooted, but SDK apps requesting escalation of privileges do rely upon su.
This question here generally duplicates: How to get root access on Android emulator?
adb shell scripting must:
start the emulator
run adb root
run adb shell
remount system partition
adb push the su binary
chmod to set permissions
exit
Or to answer the question:
start the emulator
and check if the file exists, eg. with adb shell stat /usr/bin/su
Where stat gives this response, when it's not installed:
stat: '/usr/bin/su': No such file or directory
One could even loop all Android images installed in $ANDROID_SDK_HOME...
there's no "one click" solution, but adb can be fully automated with Bash or Batch. And one wouldn't even have to run the emulator, but can mount QCOW2 as a nbd network block device.

adb install system app

I am aware that using adb install command installs an app in the /data/app folder. Also I know the in order to install an app as a system app I need to push it directly to the system. Is it possible to use adb install directly to the /system/priv-app/ on rooted phones?

if I got your question, this should do the work:
adb root
adb remount
adb push apk-filename-here /system/app/
adb shell chmod 644 /system/app/apk-filename-here
adb reboot
See this or this link for more info.

You can not use adb to directly install app at /system/priv-app/. Even If you copy your .apk, .odex files to this path device can not recognize your app as system app. For this you have to use same certificate with which your system apps are signed.

Is it possible to Root Visual Studio Emulator Android?

I am currently using 'Visual Studio Emulator for Android' to run android apps on my computer, i find that after using multiple types of emulators bluestacks, genymotion, andy etc. That VS is the most stable and easy-to-use out of them all.
The only problem that i have compared to the other emulators is running apps that require root permission, with this being an emulator i know that its not possible to go the route of rooting via fastboot/recovery, this is the only method i know of rooting as thats how i normally do it on my phone.
I have tried most of the 'rooting' APK's (kingo,towel,frama etc) and none of those have worked.
So would anybody happen to know how i can get root access on Visual Studio Android Emulator?
I am trying to run a touch-replication app (Frep & RepetiTouch) but all of them seem to require root access.
Any advice would be much appreciated. Thanks

Yes, you can. Here are some basics before the steps. Fundamentally all Visual Studio Emulator has root access; if you do adb shell you will get a root prompt. The only thing that is missing is the su binary and access for applications to connect to root shell through su. You can get the su binary from superuser apk from clockworkmod and the access to the root shell through the su daemon.
Installing su binary
Download superuser apk from clockworkmod. Ideal way is to download the app from google play store and navigate to /data/app/ and copy com.koushikdutta.superuser to your pc through adb pull /data/app/com.koushikdutta.superuser <local_path_in_your_system>
Change the .apk extension to .zip.
Navigate to assets/x86/ and copy the su binary to /system/xbin in your emulator
adb push <location_of_su> /system/xbin
chmod with suid and rwx
adb shell
chmod 6777 /system/xbin/su
symlink to /system/bin
ln -s /system/xbin/su /system/bin/su
Run the su daemon
/system/xbin/su --daemon
Giving Access to Applications through su
Install the superuser binary by either dragging and dropping into
the emulator or using adb install <path_to_superuser_apk>
Download rootchecker free\basic or even a terminal emulator for that
matter. We just want to check if our device is rooted.
Run the rootchecker app to check root and you should be able to get
the prompt from superuser.

Android: Difference between User vs System App development [duplicate]

I need create my app as system, because i need get permission android.permission.WRITE_SECURE_SETTINGS.
After install to virtual device (Eclipse) my app appears in '/data/app'. I try manually move him to '/system/app', set rights 644, but when i launch my app - toast 'App isn't installed'. After reboot (close virtual device and restart) my app disappeared from '/system/app'.
Add:
- 1. Why android can not see my application in '/system/app'?
- 2. Why after restart virtual device my app disappeared from '/system/app'?
What the best way make my app system on Eclipse Emulator and real devices?

The apps installed on your Android devices can be broadly categorized as system apps or user apps, based on their installation location. The user apps are just all your normal app installations through the Google Play Store, Amazon Appstore or sideloading. These go into the /data partition of your Android phone, which is the part of the internal memory made available for user data and apps.
System apps are basically the apps that come pre-installed with your ROM. In a standard Android user environment, the user doesn’t have write access to the /system partition and thus, installing or uninstalling system apps directly isn’t possible. The process isn’t as hard as it may sound. However, there is a catch.
In order to install an app as a system app on your Android device, your device must either be rooted, or have a custom recovery installed (or both). Usually pretty much everyone who has a custom recovery installed uses a rooted ROM, so we’ll just be using the method for rooted phones.
Go to below tutorial.it might help you.
Make Your app System App

You cannot make your app by default as the system app. There are some other ways though through which you could make other normal apps as system apps on rooted phones.
You can install an APK to /system/app with following steps.
Push APK to SD card.
$ adb push SecureSetting.apk /sdcard/
Enter the console and get the shell
$ adb shell
Switch to superuser. If your device is not rooted, get it rooted first. (If you don't know how to do that, just Google.)
$ su
Remount the system partition with WRITE permission.
$ mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system
Cat your APK from /sdcard/ to /system/ , some guys get a fail with cp command due to cp is not supported. So use cat instead.
$ cat /sdcard/SecureSetting.apk > /system/app/SecureSetting.apk
Remout /system partition back to READ-ONLY, and exit
$ mount -o remount,ro -t yaffs2 /dev/block/mtdblock3 /system
$ exit
Then reboot your device, the APK should have been installed on /system/app.
As stated here.

You can't make an application as system app on emulator.But you can make an app as system app on device.For that, you need to have the git repo set up on your pc,and after setting up repo, copy the app folder in repo folder/packages/apps and put it for compile.and you will get system.img in out folder of repo.Then you can flash the system.img on sd card, so that you will get your app as a system app.And this is the only way is there to make an app as system app.

If the device is not rooted, you cannot copy anything to the System or Data partitions.
With root do the following commands in a command prompt or linux shell and all should be fine:
adb push fileName /data/local/tmp
adb shell
su
mount -o remount, rw /system
cp /data/local/tmp/fileName /system/folderOfYourChoise
chmod 644 (if its an apk and you want the system to use it as a system app)
exit (exits the su shell)
exit (exits the adb shell)
adb reboot (to apply and see changes on the device)

Install app from Eclipse to /system/app at compile time

I'm installing my application in /system/app folder. But it very difficult every time use ADB for do it. Is there any way to install app at compile time from Eclipse to /system/app folder?
This commands I'm using for install. But I want avtomate this commands from Eclipse when I press Run button. How can I do it?
adb push C:\XXX.apk /sdcard/XXX.apk
adb shell
su
mount -t rfs -o remount,rw /dev/block/stl9 /system
busybox cp /sdcard/XXX.apk /system/app/XXX.apk

For development work, you can run "adb install" from a command line, or let Eclipse run the "adb install" for you automagically.
If you want to "publish" your .apk, you'd typically use Android Market.
Here are a few options that don't necessarily require Android Market:
http://maketecheasier.com/install-applications-without-the-market/2011/01/28