(The philosophy of Android development is to treat everything as a component. The advantage of componentization is to reduce the coupling between modules and improve the reusability of modules together. The biggest difference between Android's component design thinking and traditional component design thinking is that the former does not depend on the process. In other words, even if the process is forcibly killed due to serious memory problems, the components running in it still exist. In this way, when the component needs to be used again, it can be revived with full blood, as if nothing has been generated. This design thinking is very suitable for mobile devices with small memory. Understand the design thinking of Android components, and better understand the application architecture of Android. In this section, we will talk about the background, philosophy, and principles of Android component-based design, as well as the component-based support provided by Android at the OS level. In addition, we will also include an experiment to verify this component-based design thinking, which can provide a high-level general understanding of the Android system.)
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