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Author: Li Gang, Huawei distributed hardware technology expert, sun Binxin, Huawei application framework technology expert   HarmonyOS is a new distributed operating system, which provides developers with distributed technologies such as meta capability framework, event notification and distributed hardware, so as to develop distributed applica ...

First entry app: HelloWorld         1. How to run a project Login account                  Turn on the simulator Note: this simulator is not a local simulator, but in the Huawei server. The advantage is that this simulator does not need to occupy local resources, but it cannot exceed 1 hour after startup. I ...

Harmony OS device development learning record (12) -- light the oled to display Chinese characters and pictures through I2C. Based on hispark wifi suite, harmony os 2.0 full code is adopted 1, See the schematic diagram to determine the hardware circuit Schematic diagram of oled 2, Create a demo file in the source code First, clone the dri ...

catalogue What is the HarmonyOS operating system: HarmonyOS has three characteristics: Technical architecture: Distributed soft bus: Distributed device virtualization: Distributed data management: Distributed task scheduling One time development, multi terminal deployment Unified OS, flexible deployment Equipment certificate certifica ...

The previous article has introduced the method of obtaining the current location, which has a problem: there is a deviation of about 500 meters from the actual location. Cause investigation After some investigation, it is concluded that the gps signal uses WGS-84 coordinate system, while Gaode map uses GCJ-02 Mars coordinate system. Only af ...

Trans in soft bus module_ Service directory analysis summary This paper mainly summarizes trans under soft bus module_ The functions and functions of a file in the service directory are macroscopically grasped_ The role of service in Hongmeng system. trans_ The service module relies on the network socket service provided by the system OS to pr ...

[this article is participating in the "prize essay | harmony OS essay contest"] Service card overview The service card (hereinafter referred to as "card") is FA It is an interface display form of FA, which puts the important information or operations of FA in front of the card, so as to achieve the purpose of direct servic ...

A hundred blog series This article is: v66.xx Hongmeng kernel source code analysis (root file system) | file system first attached to / | 51 .c .h .o Relevant articles of the file system are: v62.xx Hongmeng kernel source code analysis (document concept chapter) | why do you say everything is a document | 51 .c .h .ov63.xx Hongmeng ker ...

HarmonyOS actual combat At present, CSDN's official App is not adapted to Hongmeng system, but we are programmers and can develop it ourselves. Why wait for CSDN? Do it yourself. Today, let's realize an interesting Hongmeng card. That is, put the first 10 of your latest blog posts on Hongmeng card and show them to you. In addition to p ...

Overview of relational database Relational Database RDB (Relational Database) is a database that manages data based on relational model. Based on SQLite components, HarmonyOS Relational Database provides a complete set of management mechanism for local database, and provides a series of add, delete, modify, query and other interfaces. It can a ...