android-maven-plugin: deploy method that does not delete SharedPreferences

android, proguard, sharedpreferences

Solution

I think your app is being uninstalled before being reinstalled again - this would cause you to lose your SharedPreferences values. This can be controlled with the Android Maven plugin parameter undeployBeforeDeploy.

I just tried to create a Maven project with the android-quickstart archetype and found that it automatically added the following line to my POM:

<undeployBeforeDeploy>true</undeployBeforeDeploy>

Try to set this to false and try again.

If you have it set to true, it prints this line in the console when you run `mvn android:deploy`:

[INFO] Successfully uninstalled [package] from [device]

Problem

I built an android project that set up with android-maven-plugin. When I execute android:deploy and run the program, SharedPreferences always initialized. Is there a way to deploy my project to AVD without deleting SharedPreferences storage? P.S. I use Intellij IDEA and noticed that its native android run/debug support does not delete SharedPreferences. However, after I add scala support on my project, IDE reports "Too many methods: 112423; max is 65536" error when I run the application. Perhaps it is due to lack of proguard preprocessing. If there are a way to apply proguard before run the android app with Intellij IDEA android support, it would be an equally effective solution.

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