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android – How do I set the default properties in an AOSP build?

Posted by: admin April 23, 2020 Leave a comment

Questions:

Where can I change the default Android device properties in my custom AOSP build?

For example:

  • GPS – ON;
  • Sync – ON;
  • Brightness – AUTO;
  • Bluetooth – OFF;
  • WiFi – OFF;
  • Sound – default sound;
  • Vibrate when ring – OFF;

These settings should be defined in the build so they are already in their correct state once build is loaded.

Is there a centralized file/folder for all the settings? Or a Settings application that gathers by itself settings from all Android platform modules?

How to&Answers:

There are two main places I usually check for defaults:

/frameworks/base/packages/SettingsProvider/res/values/defaults.xml

and:

/frameworks/base/core/res/res/values/config.xml

Its also worth checking the device directory for overlays which just override the original files:

/device/<company-name>/<product-name>/overlay/frameworks/base/core/res/res/values/config.xml

Default wallpaper usually hardcoded to:

/frameworks/base/core/res/res/drawable-nodpi/default_wallpaper.jpg

Default volume levels for various streams(int[] DEFAULT_STREAM_VOLUME):

/frameworks/base/media/java/android/media/AudioSystem.java