Mifare Classic & Ultralight Extension

Extensions
23

Hi,
I also tried to update my app bud when I install the build on my Andoid 13 phone I get the error:

The Application wasn't installed, because the whole package looks unproperly

If I get a older build it installs fine, bud if I build it today I get the error. I deleted the Mifare Extension and then it installs again. I also tried the MifareInfo.aia bud it haves the same problem.

The culprit is probably to do with the SDK version used by appinventor as mentioned here: Application is OK, but I can't install it (APK) on my (Android13) smartphone - #25 by ewpatton

Could you have a look to fix you’re amazing extension so it is usable again on android 13?

Have a great day!
Greetings,
Sander

24

If you want a “quick” fix, I got it working. You have to add android:exported="true" to the AndroidManifest.xml like said here: Android 12 changes - #2 by Anke

I did this the following way:

  1. Build and download your APK to your PC.

  2. Download and open the program APK editor studio: APK Editor for PC and Mac – APK Editor Studio

  3. In APK editor open your APK file.

  4. In the left screen select the tab “File System”.

    image
    image331×519 4.95 KB

  5. Click on “AndroidManifest.xml”

  6. In my case, add android:exported="true" to the line
    <activity android:launchMode="singleTask" android:name=".Screen1">
    so you get:
    <activity android:launchMode="singleTask" android:exported="true" android:name=".Screen1">

    image
    image842×162 7.29 KB

  7. In the top-bar click “save-APK”.

  8. Now try it out if it works.

Thit works for me, hope it helps.

25

Thank You @Sander_V,
I sent a message to @Leppke yesterday where I suggest to modify the manifest like this:
<activity android:launchMode="singleTask" android:name=".Screen1" android:exported="false">
I was waiting an answer before to write here but now you confirm that solve the problem.

Thank You for your tip

Ciao
Marco

26

Hi @duv @Leppke and @Sander_V ,
I just added the android:exported="true" in the extension , so You don't need to change the manifest.
Please download and try if your app works correctly.
mifare.info.aix (21.9 KB)

Ciao
Marco

1 Like
27

It works, thank you very much!

1 Like
28

Hi @Marco_Perrone, Sorry for the late reply, I have been on holiday. Your extension is great! It works fine! Thank you very much!

1 Like
29

This topic was automatically closed 7 days after the last reply. New replies are no longer allowed.

30

Hello everyone,

I use the @Marco_Perrone extension for Mifare classic tags Mifare Classic & Ultralight Extension - Extensions - MIT App Inventor Community.

For my app I need to read multiple blocks in a row, without rescanning the tag. I tried several solutions like switching off and on read mode or hotswapping block-to-read id
image

If you have an idea of a solution it could save me a lot of time. I also searched for the extension source code to add those functionalities but in vain.

31
32

Hi @lieutenant_X,
I attach a sample that should help You to solve your problem.
I used a Clock to Read a MifareClassicBlock and everytime the clock is fired I add 1 to the variable Block to read the next Mifare block
Ciao
Marco
MifareReadWrite.aia (24.1 KB)

33

Thanks a lot, it works pretty well. Do you have a solution too to read a tag what triggered the app opening ? (if the app is set as the default one for Mifare tags, it opens automatically when one of them is detected by the phone).

34

Ciao @lieutenant_X, the extension when a tag is approched use the TAG_DISCOVERED action that is the lowest level to detect a tag, I was able to develop only this method.
To do what You need I have to develop TECH_DISCOVERED, I tried but with no success.

Ciao
Marco

35

The extension works well, but it lacks a block to detect whether an NFC card is currently in place. Any solution for that condition.