targetingui
Splash screen and cold start
The system shows a splash screen drawn from the app icon for every cold start.
What to doUse the SplashScreen API for customisation and keep the icon simple.
API 12 · HONEYCOMB_MR1
Android 3.1 Honeycomb
USB host mode
What shipped
- USB host mode
- Joystick and gamepad support
- Resizable widgets
- New Movies and Books apps
What developers had to deal with
- android.hardware.usb
- New widget resizing
- ParcelFileDescriptor improvements
Behaviour changes
The full archive has every recorded change with its migration advice.
targetingsecurity
Untrusted touch restrictions
Touches that pass through untrusted overlays are blocked.
What to doRemove overlay windows from touch paths and use the proper system APIs.
Where this sits
Release 12 of 37 API levels, by date
- Headline features
- 4
- Architecture changes
- 0
- Developer changes
- 3
- Sources cited
- 2
Kernel
This release shipped on Linux kernel versions 2.6.36. Kernel versions vary by device.