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3.17. Heavyweight Apps
If device implementations declare the feature FEATURE_CANT_SAVE_STATE,
then they:
- [C-1-1] MUST have only one installed app that specifies
cantSaveStaterunning in the system at a time. If the user leaves such an app without explicitly exiting it (for example by pressing home while leaving an active activity the system, instead of pressing back with no remaining active activities in the system), then device implementations MUST prioritize that app in RAM as they do for other things that are expected to remain running, such as foreground services. While such an app is in the background, the system can still apply power management features to it, such as limiting CPU and network access. - [C-1-2] MUST provide a UI affordance to chose the app that won't
participate in the normal state save/restore mechanism once the user
launches a second app declared with
cantSaveStateattribute. - [C-1-3] MUST NOT apply other changes in policy to apps that specify
cantSaveState, such as changing CPU performance or changing scheduling prioritization.
If device implementations don't declare the feature FEATURE_CANT_SAVE_STATE,
then they:
- [C-1-1] MUST ignore the
cantSaveStateattribute set by apps and MUST NOT change the app behavior based on that attribute.