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How do I migrate a model out of one django app and into a new one?
I have a django app with four models in it. I realize now that one of these models should be in a separate app. I do have south installed for migrations, but I don't think this is something it can handle automatically. How can I migrate one of the models out of the old app into a new one?
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“Default Activity Not Found” on Android Studio upgrade
... Didn't work for me. I'm having to settle for launching the app manually. This sucks.
– DavidH
Oct 30 '18 at 10:55
2
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What is an Android PendingIntent?
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A PendingIntent is a token that you give to a foreign application (e.g. NotificationManager, AlarmManager, Home Screen AppWidgetManager, or other 3rd party applications), which allows the foreign application to use your application's permissions to execute a predefined piece of ...
Need to handle uncaught exception and send log file
... are a number of things you need to do:
Handle uncaughtException in your Application subclass.
After catching an exception, start a new activity to ask the user to send
a log.
Extract the log info from logcat's files and write to your
own file.
Start an email app, providing your file as an atta...
SecItemAdd and SecItemCopyMatching returns error code -34018 (errSecMissingEntitlement)
Sometimes when I run an application on device from Xcode I would try to access the keychain but fail due to error -34018. This doesn't match any of the documented keychain error codes and can't be consistently reproduced. (happens maybe 30% of the time, and it's not clear to me why it happens). What...
How do iOS Push Notifications work?
...It was too much for me to put in a comment so.
From the documentation.
Apple Push Notification service (APNs) propagates push notifications to devices having applications registered to receive those notifications. Each device establishes an accredited and encrypted IP connection with the service...
Using gradle to find dependency tree
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For Android, use this line
gradle app:dependencies
or if you have a gradle wrapper:
./gradlew app:dependencies
where app is your project module.
Additionally, if you want to check if something is compile vs. testCompile vs androidTestCompile dependency...
Best practices for in-app database migration for Sqlite
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I maintain an application that periodically needs to update a sqlite database and migrate old databases to the new schema and here's what I do:
For tracking the database version, I use the built in user-version variable that sqlite provid...
What does @hide mean in the Android source code?
...aces, whether directly, via reflection, or via JNI. These restrictions are applied whenever an app references a non-SDK interface or attempts to obtain its handle using reflection or JNI.
But before API level 28, the hidden methods could still be accessed via Java reflection. The @hide attribute i...
How to add a jar in External Libraries in android studio
...cture from Android to Project.
Now search for the libs folder inside app - build folder.
Once you have pasted the .jar file inside libs folder. Right click on the jar file and at end click on Add as library. This will take care of adding compile files('libs/library_name.jar') in build...