How can I compile MITAI2Companion.asc?

[Yong Tang]

Thanks for every one.

[Jose Dominguez]

Hi there, what do you mean by asc?

The companion is compiled with the rest of the system when you run
"ant". If you look for an apk file in your build directory, it should
be there.

cheers,
José



On 5 June 2018 at 02:28, Yong Tang <fsy...@gmail.com> wrote:
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[Evan Patton]

MITAI2Companion.asc is a Base64-encoded copy of MITAI2Companion.apk, which José describes how to build. On *nix like systems, there is typically a program called base64 that you can use to encode/decode content. You can also use the openssl base64 command. Not sure about Windows.

Evan

[Yong Tang]

appinventor/components/src/com/google/appinventor/components/common/YaVersion.java


public static final String COMPANION_UPDATE_URL = "/companions/MITAI2Companion.asc";
public static final String COMPANION_UPDATE_URL1 = "/companions/MITAI2Companion.apk";

So i need MITAI2Companion.asc.

在 2018年6月5日星期二 UTC+8上午9:28:55，Yong Tang写道：

Thanks for every one.

[Evan Patton]

Hi Yong,

Please see my previous post in this thread. MITAI2Companion.asc is just a base64-encoded copy of MITAI2Companion.apk. You will need to use a platform-specific utility to base64 encode the APK file. For example, on Mac I would run base64 MITAI2Companion.apk > MITAI2Companion.asc to convert the app.

Regards,

Evan

[Yong Tang]

Thank you 

i test 

openssl base64 -in  ./MITAI2Companion.apk -out ./MITAI2Companion.asc 

在 2018年6月7日星期四 UTC+8下午11:24:13，Evan Patton写道：

[Evan Patton]

That should work, yes.

Evan

[Yong Tang]

The update package does not match the signature of the installed application.

在 2018年6月7日星期四 UTC+8下午11:46:51，Evan Patton写道：

[Evan Patton]

Assuming the version you currently have is the version published by MIT via the Google Play Store, this is correct. You will need to uninstall the MIT version and install your custom version. You will not be able to upgrade from the MIT companion to your custom companion (or vice versa) for security reasons. This is enforced by Android.

Regards,

Evan

[Yong Tang]

Does the signature of apk(MITAI2Companion.asc  MITAI2Companion.apk) change every time after ant clean && ant?

After the version is found to be upgraded, it cannot be upgraded on its own compiled version.

like this:

git pull
git submodule update
cd appinventor

ant clean

ant

在 2018年6月12日星期二 UTC+8上午1:31:20，Evan Patton写道：

[Evan Patton]

The companion you build is signed by the keystore located in the .appinventor folder in your user home directory. If you are somehow deleting this file, then the key footprint will change every time. This file persists across "ant clean" invocations, so you should be fine. You may need to bump the version code in aiplayapp/youngandroidproperties/project.properties for your phone to recognize it as a valid upgrade. Another thing that I have seen is that sometimes the .asc file contains a newline and the Base64 decoded in Android doesn't seem to appreciate that, so you may want to check the file and ensure that it does not contain additional whitespace.

Evan

[Yong Tang]

The .appinventor/debug.keystore was copied to a different computer and the ant PlayApp had the same signature.

Thank you.

在 2018年6月13日星期三 UTC+8上午1:45:16，Evan Patton写道：

[Yong Tang]

  

  public static final String COMPANION_UPDATE_URL = "";

  public static final String COMPANION_UPDATE_URL1 = "";

  public static final String COMPANION_UPDATE_EMULATOR_URL = "";

How to set the newly added COMPANION_UPDATE_EMULATOR_URL？

MIT AI2 Companion 2.49 can't be installed in emulator(MIT_App_Inventor_Tools_2.3.0_win_setup.exe), how to solve it?

Thanks for every one.

在 2018年6月7日星期四 UTC+8下午11:04:21，Yong Tang写道：

[Evan Patton]

Emulator.apk is just MITAI2Companion.apk with the lib and META-INF directories stripped out and resigned (at least, that's how I make it... Jeff might have a different process).

Regards,

Evan

[Jeffrey Schiller]

Assuming you are using our package name (edu.mit.appinventor.aicompanion3):

Build your new Companion. As Evan has said, remove the android.sf and android.rsa files as well as everything under lib (the large files that end in ".so").

You can sign it in two different ways:

1. Jarsigner: Use the java jarsigner tool using your android.keystore file to sign the edited Companion. Then use the "zipalign" tool from Google to align the file.

2. apksigner: *first* use the "zipalign" tools to align the file and then use Google's "apksigner" tool to sign the Companion

After you have done one of the two steps above, start the emulator (you can do this from App Inventor itself). Make sure you have the Google "adb" tool installed. Then once the emulator is running do:

"adb uninstall edu.mit.appinventor.aicompanion3"

This will uninstall our version that comes with the setup tools and is signed with our key.

Then "adb install <whereeveryournewversionis>"

This should install your version of the Comapnion. Then restart the emulator and you should be running.

-Jeff

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Jeffrey I. Schiller
Information Systems and Technology – MIT App Inventor

Massachusetts Institute of Technology

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_______________________________________________________________________

[Yong Tang]

Thank you Evan and Jeffrey.

Successful.

unzip MIT AI2 Companion.apk delete lib and META-INF , zip back

jarsigner.exe -keystore debug.keystore -digestalg SHA1 -sigalg SHA1withRSA "MIT AI2 Companion.apk" AndroidKey  

password :android

zipalign.exe -v  4 "MIT AI2 Companion.apk" "emulator.apk"

在 2019年1月4日星期五 UTC+8下午11:36:13，j...@mit.edu写道：

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[Yong Tang]

MIT AI2 Companion 2.50 can't run in emulator

在 2019年1月5日星期六 UTC+8上午11:12:14，Yong Tang写道：

[Evan Patton]

I tested on both macOS 10.14 and Windows 10, and in both emulators I was able to load 2.50. Are you making sure to strip out the shared libraries for WebRTC?

Regards,

Evan

[Yong Tang]

It is normal to reinstall MIT APP Inventor Tools 2.3.0.

在 2019年1月7日星期一 UTC+8下午11:45:13，Evan Patton写道：