Most users of the original Google App Inventor service can find a copy of their app source zip files, as well as the keystore that was used to package their apps, in their Google Docs accounts:. In the news Events Stories from the field. App Inventor Blog. Troubleshooting for App Inventor Classic. The Blocks Editor won't open: Java reports a "security exception". The Blocks Editor won't open: Java reports "unable to launch application". Installing device drivers I ran the App Inventor Setup installer on Windows, but the phone device drivers do not install.
Connecting to the App Inventor website and designer I see a blank screen when I go to beta. Using the Blocks Editor and loading projects I get the error message "The Blocks Editor does not have any project information My Blocks vanished from the Blocks Editor. The Blocks Editor behaves badly on Linux.
The following actions might help: Open a shell prompt. Restart udev reload udev Revert to your local user account exit Finally, a cold reboot might be required The Blocks Editor won't connect to the phone or media files don't show up on the phone.
I'm using Firefox and I get a message about being unable to access project definitions. I'm running Android 4. Connecting the phone over wifi I'm using wireless and the phone won't connect to the blocks editor. Using the Emulator I'm using a Mac, the emulator won't open, and there is no error message. Running apps on the phone I was developing an app and it crashed on the phone. My phone doesn't seem to match what's in my program. App Inventor apk files are in fact very large. We're working to reduce their size.
My app causes a virus warning. Testing apps with multiple screens I'm trying to test my app that has multiple screens and it's not working correctly Apps with multiple screens must be packaged and sent to the phone to test.
If this is a problem for you due to wifi or other issues, follow these instructions: Download the free app called ES File Explorer from the Google Play Store on your Android device.
Using your computer, navigate to your Computer, and find your device, and double click to navigate to its Download Folder Drag and drop your App's. On your device, launch the ES File Explorer App, Using this app, you can then navigate to your tablet's Download Folder and double click on your appinventor app to launch it! Working with sounds and images I set the image property of a button or other component to an image file, but nothing shows on the phone.
There are several possible causes for this, so there are several things to try: Make sure your phone has an SD card and that the SD card is not full. For example, on the Droid, you should set the connection mode to "charge only". If you get an error message about external storage , you'll need to check that your phone is not set for Mass Storage mode: Tap the Home button to go to your phone's Home screen, then Tap the Menu button, then tap Settings, then tap Connect to PC.
Tap Connection Type and choose "Charge Only". Make sure that other choices are not selected. Try unplugging the phone and plugging it back in. If that doesn't work, close the Blocks Editor and refresh the browser window.
Now restart the Blocks Editor, reconnect the phone, and see if that works. If that doesn't work, try packaging and downloading the app. Start up the downloaded app, not connected to the Blocks Editor, and see if the image appears on the phone. If the image does appear, then you'll have to continue developing without the image showing on the phone.
You'll see your app in its full glory only after you've packaged and downloaded it, not while you're developing the app live.
Please ask about this in the App Inventor Forum. If your image does not appear in the packaged app either, then you should suspect that there is something wrong with the image file.
Perhaps it is not really an image file: Try examining the file with some graphics software. Maybe the file is too large: try using graphics software to cut its size down to less than K. Tip: You can sometimes see complaints about the phone running out of storage by using the Android Debug Bridge to examine the Android system log.
Hello Purr does not work on my Lenovo A1 Tablet -- the meow. Change your blocks to use the Player component instead of the Sound component. Packaging projects for a device When I try to package my project, it fails with "unexpected problem generating Yail". Keystores and Signing of Applications ".
Download the zip file by clicking on Download under File. Unzip the downloaded file and you will find a directory called keystore containing a file called android. This file contains the keystore that was used to sign the apps for that App Inventor account on the Google App Inventor service. I'm just lost! Ask other users for help on the App Inventor Forums. Take a look at steps 5 and 6 on this page for some things to try.
I'm using Firefox and I got an error message about being unable to access project definitions. If you are using Firefox and have the "noscript" extension installed, you'll need to disable it. Other tools and system configurations that restrict access to your computer e.
You should check for these if you encounter errors about reading definitions or connecting to the phone. Try the following steps to troubleshoot your wireless connection.
If you have a "telnet" program, you can attempt to telnet from the computer to the phone on these ports. If the connection won't complete, then there is likely a firewall in place that is blocking connections to the phone. If you attempt to use an older version of the Companion App with App Inventor, you will be prompted to update it. If you have trouble connecting using these wireless instructions, make sure your phone is using WiFi and not the cell network.
On some devices and in some locations, even with WiFi enabled, the phone continues to use the cell network for Internet connectivity.
If this is happening to you, you can disable mobile networking cell phone carrier based Internet connectivity from your device's Android settings menu. More information about how the WiFi connection works.
App Inventor says: You must be connected to the companion or emulator to use "Do It". This message means that App Inventor believes that it's not connected to any device. If you are using the USB cable, first check that the phone is securely plugged in.
You can also check the connection by using the Connection Test Page. Once the phone is connected, stop the Companion software on the phone and try connecting again. The phone or emulator shows a notice -- Security error receiving blocks from browser. The browser may have loaded a new project without the Companion recognizing that. Perhaps the phone was unplugged? Reset the Companion by using the menu key on the emulator and select "stop this application.
This can happen if App Inventor tries to connect and start the Companion, and the Companion is already running on the device perhaps from a previous project. Go to the running Companion app, press menu, and choose to stop the application. Then try reconnecting again. If this keeps happening, try rebooting the device. App Inventor sees only one connected device at a time.
IIf you were using the emulator, you'll need to quit it before you can connect the phone via USB. You can also ask for help from other users in the App Inventor Forum. First try clicking the Designer button, then click back to the Blocks button. Sometimes the app showing on your phone is lagging behind what is in your browser, and needs to be updated on your phone.
Switching between these two screens causes a refresh. I was developing an app and I unplugged the phone, and the app disappeared from the phone. It's supposed to disappear. If you want to use the app when the phone is disconnected, you'll need to package it and download it to the phone. The code size for the apps I create is very large.
Even the simplest apps have apk files that are larger than a Megabyte. There is a known issue with certain virus protection software, in particular the "Dr.
Web" anti-virus app. Any app that uses the texting component SMS will generate the virus warning "android. This is a false positive virus detection that you can safely ignore. Apps with multiple screens must be packaged and sent to the phone to test.
If this is a problem for you due to wifi or other issues, follow these instructions:. I set the image property of a button or other component to an image file, but nothing shows on the phone. I set the source property of a Sound or Player component, but there's no sound when I tell the phone to play.
If you are working with the phone connected to the computer, make sure the phone really is connected. Try using "Do it" on a few blocks, including the block that tells the component to play. Also make sure the phone's media volume is not turned down! If this doesn't help, try some of the same things as with images, above.
Make sure you have enough storage. See information on media in App Inventor. And make sure the audio file is a format the Android and hence App Inventor knows about.
First, check to make sure that the volume on your device is all the way up. Also, be sure you've got something typed into the dark pink text block, and that it is plugged into the purple TextToSpeech. If that text box is blank then you aren't telling the device to say something.
Anke July 5, , pm 4. Sorry for the late reply. I had little time and haven't worked with jarsigner yet. Same result. Anke July 5, , pm 6. Yes this dir is there in both case that I tried so also after removing it. App not installed. German: "App wurde nicht installiert. Anke July 5, , pm 8. Anke July 5, , pm Boban July 5, , pm As I don't have the ability to test through playstore however, I was able to go back and forth when installing, apk install from Kodular aab, adding extra files, signing, extracting universal.
Fairly quickly. Hi, I am having the same problem as Greg and Richard. I have tried a few methods with the following outcome. However, for games without any download required, the loading bar will not even appear at all while the MIT Companion will be stuck at the enter code page forever:.
Also android tablet. Also legacy. No luck. I gotta believe the hardware server story is the correct one. Sorry work arounds are not working for some of you. MIT is trying to fix the issue going so far as to replace existing server hardware. This may take some time. Please be patient; eventually the server will be back to normal. The issue for some of you may be your existing Project having issues. You can test this by creating a simple Project place a Button on a form and using Companion with Legacy checked.
Seems to be a bit on and off, one minute it won't connect legacy ticked then next minute or a few minutes later connects just fine. When I scan the QR code it says "20 Establishing secure connection". But then it stops there and doesn't proceed.
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