Programmer Think

Preface Event distribution mechanisms are fundamental and important knowledge in Android, and Activity#dispatchKeyEvent() or Activity#dispatchTouchEvent() is generally considered as the starting point for distribution.So the question arises, who called Activity's method?How do input events occur? The Android system has a complete ...

We looked at the execution process of AsyncTask together in the previous blog post, but due to length, we did not parse the default startup mode (sDefault Executor) of AsyncTask. So, in this blog post, we will parse sDefault Executor.   Relevant blog posts Android Foundation - Basic Use of AsyncTa ...

Copyright Statement: This is an original article by xing_star. Please indicate where it came from! This article syncs from http://javaexception.com/archives/178 An analysis of invalid notification clicks for Android version 8.0 and above Recently, in restructuring the chat service, there was an opportunity to refresh the previously written n ...

Write in front Dear friends and relatives, brothers and sisters of CSDN, I want to kill you! Here should be applause, disappeared nearly two months of Han Xiaodai, I came back, again need applause, the dull finally adapted to the new company's various models (in fact, hands from a 0-1 project). The fo ...

Proxy Pattern, also known as Delegate Pattern, is a structural design pattern and a basic design skill. In daily applications, the use of proxy mode is very high. Many other design modes are essentially targeted optimization of proxy mode in a specific context, which shows the importance of proxy mode. _The first section of this pa ...

During the development process, we need to use some custom View s, which can generally be divided into three categories: (1) Inherit Class View - Basic View after the general inheritance system, add/reset some custom properties, such as two-end aligned TextView; (2) Combination Class View - Combining several basic views of the system to form ...

Links to the original text: http://www.cnblogs.com/riasky/p/3471323.html In order to adapt to the larger and larger device screen, Android introduced the concept of Fragment after 3.X, which can display multiple activities on one screen ...

I. Template pattern In daily object-oriented development, there is sometimes a requirement that we know the key steps in the implementation of an algorithm or business logic, and determine the execution sequence of these steps; however, the specific implementation of individual/certain steps is unknown ...

1. Preparing documents Go to DCloud website by yourself: http://dcloud.io/ Download the official IDE Hbuilder and create an empty uniapp project. uniapp framework comes with optimized vue, we only need to prepare the following three files: Bootstrap.min.css//bootstrap 4 or more. https://unpkg.com/bootstrap@4.3.1/dist/css/bootstrap.min.css boots ...

Controls provided by the system sometimes do not meet our needs, so we use custom controls. Here we introduce Button highlighting, Edittext highlighting, custom Seekbar,Edittext style, and ShapeDrawable! 1.Button click highlight When we click the button button, the color of the button button should ch ...