Translator｜ Ma Kewei Planning｜ Tian Xiaoxu This is a story with a complete aftermath. As a full-stack web developer with almost sixteen years of development experience, the author knows all the technologies required to build web applications. In recent years of work projects, the author became an Android developer for the first time. After a period of running-in, the author realized that the developer’s thinking also needs to be transformed from web development to Android and mobile application development. Most of the wrong paths for the newbies of Android development can be solved by refactoring or modifying the build process in the later stage of the project, and continue to polish until the unit test perfectly covers all the situations required and can also handle some small errors. But the rest of the missing fish are not so easy to solve. These are enough to have a lasting impact in the life of the app and make people want to overthrow the entire project. Some of the mistakes even make the author ashamed to say that he has made mistakes. Pass them. The following will provide some tips to prevent the time paradox (laughs) when you want to go back to the past and redo the project. I hope it can help you prevent the bad troubles that are hard to get rid of. Add in-app update immediately. It wasn’t until a year after it was released that we plugged the update notification function into our app. If the built-in update reminder function is added at the beginning of the project, then the process is fairly simple, but if it is delayed until later, it will inevitably cause a lot of problems, including: the need to build a custom process manually, and the user to try it on his own Skip the update. Believe me, this feature will be a breakthrough change for your app. Existing users of the app may have become accustomed to the in-app update function through other apps, and even take it for granted that this should be one of the features of the mobile platform. But in fact, it wasn’t until I personally experienced Android development that I knew that this feature had to be manually added by the developer. When your app unfortunately stops running, users will not look for software update packages, they will only uninstall and then install them, or even worse, they will leave comments in the app store. Restrict API key Let the program run first, and then apply a patch if something goes wrong. Maybe you also have this habit, but please don’t continue to delay. Point out an article about API keys on Google Cloud Platform, but for other platforms, the same applies. For GCP (Google Cloud Platform), we only need to log in to the Google account and select the API key to be restricted, and the system will jump to the key attribute interface. Select the Android application in “App Restrictions” and click “+” to add the package name to the API key that needs to be restricted. As for adding certificate fingerprints, you can directly copy the commands on the page and follow the instructions on the right side of the page. It only takes a few minutes to complete. We only started restricting API keys two years after the app was shipped. However, after the restriction, a map function of the app went on strike. After rolling back the changes, it took us a lot of work to find the problem. Most of the official Google software packages used by the app can be perfectly adapted to the code behind the restricted API key. Only one of the maps needs to rewrite the other set of API call codes. If we can consider the limitation of the API key at the beginning of the project and write it into the source code, this will undoubtedly increase the development time, but in the later stage, we can no longer worry about the limitation. The story does not end here. In order to ensure the normal operation of the map and limit the API key, we have to perform a mandatory update. We have background statistics to monitor the user’s update process, and the data shows that 90% of users update only a few weeks after receiving the update notification, while the other 10% still choose when the map is almost completely out of order. Without updating, I don’t know how they endure this kind of bug. Internal API version control When I was still focusing on web development, I never understood why someone would want to do this. After updating the front-end code, why keep the old version of the API? No matter how you think it is useless waste. However, when the software version used by the user is different, a major update of the API may cause a large-scale software crash. The method of in-app update can help alleviate this problem, but the process will be extremely long. Dividing API versions is more like a quick and simple solution for this kind of software crashes, rather than over-engineering as I once thought. Want to go offline beforehand Our app has practical goals. When we received feedback from users that the app reacted stuck and the response timed out, I was just a novice in mobile app development, and I just came across a new term: Offline First. If the user fails to connect to the Internet, all unuploaded and unsaved things will be lost, and when the connection is restored, they will have to re-enter all the content. The priority offline structure will write the changes to the local database, and then synchronize when there is a network connection. In this way, the user can use the app offline, and the response will be faster when connected to the Internet. The user no longer has to wait for the server to send back a response before proceeding to the next step. The offline priority function may be more difficult to implement in the later stage of the project. The difficulty depends on the complexity of the app’s data. So please decide as soon as possible whether the app needs it. We are still studying how to better implement this feature in our “old age” app… Choose navigation items carefully If your Android app has a complex structure and many interfaces, it will be more troublesome to modify the navigation items in the later stages of the development process. Our app was directly changed to the form of bottom navigation in the later period. In some situations, the Activity in Android development can be regarded as the code of a certain screen in the app; Fragments, which are only available in Android 3.0, can be understood as the subview code or part of the code in the app. The layout of both is defined through XML. Our navigation points to the main functions in different areas of the app, and these small navigation cards each lead to different sub-functions, connecting more than 30 activities in total. These are just four fragments in this Activity-based app. Navigation drawer is another common navigation form, the main service object is the navigation needs of Activity docking with Activity form. Bottom navigation Because the bottom bar of the app is always visible, its design object is fragment navigation. After adding the bottom bar to the Activity, then we only need to type its related code into the Activity and add its view to the layout of the Activity. In this way, by clicking the button on the bottom sidebar, we can load the fragment into the Activity. So, in order to add the bottom navigation bar in the app, I tried to convert Activity to fragment. The result was very tragic. Excessive bugs directly caused the software to crash and wasted a month of my time. If we only have five or six activities, it may not be too difficult to solve, but in fact our app has more than 30 activities! This directly led me to give up other work this month and focus on adding navigation functions to each Activity. I also tried to create a helper function, but this did not save me much trouble. In the end, I still have to write code for the Activity one by one. At the same time, I also need to add the bottom sidebar to all layouts and make room for this little guy in the existing layouts. In addition, the Activity stack must be programmed to prevent race conditions. Although the process was cumbersome, it was successful in the end, and the effect was not bad. It’s just that if I can add the bottom navigation bar at the beginning of the project and start the design based on the fragment, it will be much easier. This is just an incomplete list… Of course, there are many other things to consider when starting your first Android application, such as adding unit tests, not changing the mode of an app after determining it, and so on. But if you have been exposed to other types of development models before, these should be familiar to you. Maybe you will not encounter exactly the same problem as mentioned in the article, but I am afraid it will not be too different. Hope these little tips can help you realize that Android development is very different from other types of development, and the influence of these development decisions may last for a long time. https://triplebyte.com/blog/everything-id-do-differently-if-i-could-go-back-and-rewrite-my-android-app-today

The elevator has a load capacity of 250kg For small families, only about 3 members should choose a light-weight elevator of about 250kg. The size of the cabin is 1400mm x 1400mm, optimally designed to make it easy to move but not to feel suffocated. The compact design of the mini elevator will help homeowners save maximum space and power usage. The elevator has a load capacity of 300kg The elevator has a tonnage of 300kg with a cabin size of about 1500mm x 1400mm suitable for families of 4 members. In particular, this elevator design will meet the need to move in families with a height of 4 floors or more. The elevator has a load capacity of 450kg Family elevator with a load of 450kg with a size of 1600mm x 1500mm is the optimal choice for families of 3 generations from 5 to 6 members. The lift cabin area is spacious enough for family use at the same time. In addition, the elevator can completely be used to transfer some bulky furniture such as refrigerators, furniture, television … The elevator size has a payload of 550kg and 650kg The 550kg elevator has dimensions of 1600mm x 1600mm and the elevator of 650kg is suitable for size 1700mm x 1700mm, which is equivalent to a load of 7 to 9 people at a time. These two spacious cabins will be suitable for a house with 2 families living together or luxury apartments, hotels, motels, high-rise inns … Recommended elevator sizes for renovated homes The industry is increasingly developing, home elevators are also much improved than before. The elevator’s size is completely not fixed, as long as the customer provides the data on the elevator’s installation space, the number of loads expected …, the reputable elevator supplier can ” tailoring ”an elevator that matches your family’s specifications. This is considered a “salvage” solution for renovated houses that cannot be rebuilt again and again. For example, the family elevator with hydraulic technology with Pit pit is only about 1 hand short and does not need a machine room, the height is as low as 2.2m, making the installation more convenient and easier. Therefore, the size of the elevator is also customized when it is possible to install the elevator in all positions such as the staircase, the balcony … without spending more family space but can still comfortably move. Elevator size is no longer a problem for architects or customers. What you need is to find the right elevator solution for your family such as parameters, style, technology, price … Modern has many units of supplying and installing family elevators, customers need to choose a reputable address to find the right solution for your home. Not only providing a quality imported elevator, but also for the DepaLift family elevator, when installing the mini elevator, customers can choose to install the elevator’s technology. Homeowners can completely choose modern features such as SRS self-rescue users, Emcall emergency intercom, Plasmacluster technology ventilation fan, CARe disinfection system, UV sterilization system, system SWS stroke warning system, SES intelligent entrance control system .. This protects absolute safety for users, while controlling security, privacy and improving the lifespan of the elevator. Contact DepaLift: 0974704586 for specific advice on installing elevators across the country.

As the World Health Organization (WHO) warns, Cambodia is on the brink of disaster, if the people and the Government do not agree to join hands to fight the epidemic, the consequences are unpredictable. More than a year ago, since the epidemic began appearing in early 2020 and until February this year, Cambodia has successfully prevented, only about 500 cases of Covid-19 and no one died. Doctors take samples of Covid-19 for people However, since the outbreak in the community on February 20 until now, Cambodia has found more than 8,100 people infected with Covid-19, more than 5,200 people are being treated and 59 people have died. Phnom Penh capital alone has about 6,000 cases. With the sudden increase in the number of Covid-19 cases, hospitals have become overwhelmed, and some Covid-19 patients have had to self-treat at home. Facing the urgent situation, the Cambodian government had to apply drastic measures such as blocking the entire capital of Phnom Penh and the adjacent city of Ta Khmao for the first time, setting up a curfew, prohibiting travel between localities. , and the creation of “red zones” – high-risk zones in the capital, to stop the infection chain. The blockade order was issued on the night of April 14 and was applied immediately on April 15, so many Cambodians were surprised. When the blockade was executed, people’s lives were more difficult than before, both because of the loss or loss of jobs, and because of isolation and blockade, there were also some people reacting to this order. . But until now, after the propaganda of the government, a large number of people have supported the blockade order, and determined that this is a necessary step to control the epidemic. Economic activity is affected, the government implements support policies In recent years, the Government of Cambodia has used limited and phased administrative measures to ensure efficiency in preventing epidemics and minimizing the impact on the country’s economy. The government also decentralizes the provinces to decide on their own measures of travel restriction, curfew or blockade in their own areas to proactively respond. Accordingly, Preah Sihanouk province has banned people from entering and leaving the province from March 4, the capital Phnom Penh ordered a curfew from 8:00 pm to 5:00 am from April 1, many other provinces such as Kampong Speu, Sieam Reap later That also imposed a curfew in the evening, on April 7, the Cambodian government banned travel between provinces and now the capital Phnom Penh and Takhmao city are completely blocked. The curfew, travel restriction or blockade has affected economic activities, trade of people as well as made the lives of many families difficult. Especially, most affected are those who work in service, food, and unskilled jobs because most of them do not have savings or savings. However, the Government of Cambodia does not ban goods transportation, even encourages businesses to maintain food and food supply activities to ensure people’s lives. The government also has policies to support money, food, food, asking property owners to exempt or reduce rent, banks relax debts and not charge interest to reduce the burden on households suffering from effects of the disease. Coping scripts Covid-19 of Cambodia The epidemic situation in Cambodia is still in a very stressful period with hundreds of new cases detected every day despite drastic measures of the government. Up to now, there have been more than 8,100 cases of Covid-19, of which 7,648 were related to the public infection on February 20. This situation requires the Government of Cambodia to continue to take more effective measures to curb and stop the spread of the disease. After applying a blockade measure with the capital Phnom Penh and Takhmao city, the Phnom Penh government has stepped up a step further by zoning the “red zone” with some high-risk areas, people in This is prohibited from leaving the home for any reason other than medical. Food quantity and food are also transported by the government to the front door of the households. If other regions have more Covid-19 cases, these “red zones” will expand. The government also leaves open the possibility of prolonging the blockade time if the situation does not change positively. In addition to maintaining and controlling strict implementation of the blockade, the Cambodian government also resumed its Covid-19 vaccination campaign with the goal of vaccinating 1 million people a month and will soon vaccinate about 80 people. % of population equivalent to 13 million people. Up to now, Cambodia has injected nearly 1.3 million people, equivalent to 1/16 of the country’s population. Cambodia is one of the countries with the highest proportion of people vaccinated against Covid-19 in the region.

A Thai TV3 movie received a lot of attention from the audience Song Sanaeha (Two worlds) has broadcast schedule. Right from the “conception”, the drama remake Song Sanaeha has always been hunted by fans when this is the work marking the reunion of the couple James Ma and Kimmy Kimberley after 5 years.

Song Sanaeha used to be a hit film in 2005 by “big sister” Aum Patchrapa and Veeraparb Suparbpaiboon starred. After more than 15 years, the film has been “changed into new clothes” by TV3 Thailand, sending the male and female roles to a younger generation of actors, James Ma and Kimmy Kimberley. Two worlds version 2021 produced by Maker J company for station 3.

It is known that this is the 3rd remake of the movie, the previous versions have been very successful. The actress with two Thai bloodlines – Duc Kimmy Kimberley transformed into a twin character with two opposite personalities entangled in love with the handsome James Ma. In addition to this is a “ heavyweight ” role with Kimmy Kimberley, in this movie James Ma and his female co-star Kimberley have many attractive hot scenes.

As soon as the movie teaser was released, fans had to scream because of the romantic scenes of the main couple. According to a source, the movie is scheduled to air by station 3 in early May. Netizens joked that James Ma and Kimmy Kimberley are so hot, Mark Prin (Kimberley’s boyfriend) must not like this. Fans advised him that he should leave the TV every night of the movie Song Sanaeha on air.

Song Sanaeha is a story about two twin sisters who look alike in appearance but completely opposite personalities. The reason is because both have different habitats and nurtures. Duen (played by Kimmy Kimberley) is an erratic model and actress. She doesn’t care about anyone’s preferences and feelings. Pit, after the death of her parents, she takes care of her sister and is constantly helping her.

While Duen was in a scandalous relationship with a rock musician, Pit met Warit (played by James Ma), a perfect young man who once mistook the twins for a while. first meet but quickly realize the difference between them. By a strange coincidence, he is the nephew of Duen’s new lover. Duen, tired of his older uncle, turned his attention to his nephew. As he resisted, she became more angry and used more terrible tricks to fight with the couple.

Are you excited for the remake Song Sanaeha?

In a message to the people, Prime Minister Hun Sen emphasized that the current emergency situation has caused the Government to decide to block the capital Phnom Penh: “We are standing in front of the pit of death. If we don’t work together, we will fall into this pit of death. I hope that we will turn the current problem into an opportunity, after 14 days we will have the epidemic under control.

Up to now, we have discovered 300 more cases of COVID-19 and lack of treatment. If people do not pay attention to their personal health, they will be in danger, the number of people hospitalized and the number of deaths will continue to increase.“.

On the night of April 14, the Cambodian government issued a decision to block the capital Phnom Penh and Ta khmao city, Kan Dal province to prevent the spread of COVID-19.

With the new blockade, all businesses in Phnom Penh and Takhmao must be temporarily closed, except for stores that sell food, daily necessities and other essential services such as fire, electricity, and clean water. , garbage collection.

Cambodian Prime Minister Hun Sen. (Photo: Khmer Times)

Residents are only allowed to go out when buying food and necessities periodically, buying medicine or taking medical care. The blockade order will be monitored by the local government and the relevant forces.

Mr. Hun Sen asked Phnom Penh Governor Khuong Sreng to take care of the poor by providing them with rice and other food. The Cambodian leader also ordered the opening of the government’s food stockpile.

The Cambodian Prime Minister appealed to people for understanding and patience during the 14-day blockade.

He also proposed banning the sale of alcoholic beverages nationwide to avoid unnecessary gatherings.

To effectively implement the blockade, Cambodia set up a 19-member national committee headed by Deputy Prime Minister Aun Pornmoniroth.

On April 14, Cambodia recorded more than 300 cases of COVID-19, bringing the total number of cases in the country to 4,874.