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Come on, little brother, what's the matter with Handler There are too many blogs related to Handler, and there are a large number of random searches, but they basically post the source code and pose when they come up. It's not easy to understand the overall relationship and process in a short time Interviewer, sit down and listen to my story? ...

Definition and characteristics of sharing mode Definition of Flyweight mode: Sharing technology is used to effectively support the reuse of a large number of fine-grained objects. By sharing existing objects, it can greatly reduce the number of objects to be created and avoid the overhead of a large number of similar classes, so as to imp ...

* `LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES` * `LAYOUT_IN_DISPLAY_CUTOUT_MODE_NEVER` The default value is`LAYOUT_IN_DISPLAY_CUTOUT_MODE_DEFAULT`，The fringe area will not display content, and the value needs to be set to`LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES` You can simulate the screen gap on any device or simulator running Andro ...

WHAT Dynamic agent is a kind of agent mode. Agent mode refers to that the agent helps the proxy object complete what should be completed by the proxy object. Agents usually have more powerful capabilities and are more professional than the objects they are represented. Take an example in life to illustrate that you can choose to find the landl ...

Definition of design pattern Software Design pattern, also known as Design pattern, is a set of code design experience that is repeatedly used, known by most people, classified and catalogued. The purpose of using Design pattern is to reuse code, make code easier to be understood by others, ensure code reliability and program reusability. Ope ...

1, android interface composition Activity: control model, control Window. Window: host model, which is responsible for hosting the view. View: display model, used to display. ViewRoot(ViewRootImpl): it is the link between WindowManager and DecorView. 2, View create overall process summary 1, in ActivityThread's performLaunchActivity, we ca ...

Ready to draw interface The drawing action of UI components is triggered by the application architecture, and the developer of custom components only needs to implement and log in to the drawing interface. The following code implements the drawing interface component of UI component through multiple inheritance After drawtask, execute the dra ...

In some cases, a customer cannot or does not want to directly access another object. At this time, it needs to find an intermediary to help complete a task. This intermediary is the proxy object. For example, you don't have to go to the railway station to buy train tickets. You can buy them through 12306 website or go to the train ticket agency ...

Introduction of template method mode Template method pattern: defines the skeleton of an algorithm and allows subclasses to provide implementation for one or more steps; The template method pattern enables subclasses to redefine some steps of the algorithm without changing the algorithm structure; Template method mode type: ...

This paper briefly introduces Adapter mode Enjoy element mode Flyweight summary Using sharing technology to effectively support a large number of fine-grained objects. It is mainly used to reduce the number of objects created to reduce memory consumption and improve performance. This type of design pattern belongs to structural pattern ...