Programmer Group

Android calls the system camera once, takes multiple photos and returns them to activity. In fact, Android does not provide such an api, but it can achieve this function in other ways. Idea: write down the time stamp before calling the system camera, and then go to the system picture media library to query the pictures whose c ...

Let's assume that the size of the design draft that my sister gave us is 750 * 1340. Combined with the dynamic font size attribute, design draft size and collaboration process between the front end and design on the html element of the home page of Netease and Taobao mobile terminal, they are generally divided into the following two types: 1. N ...

For HTML+ajax development front-end, many times the page will have some fixed content, such as a switch at the bottom, which is equivalent to a tab. Many pages will use it. It is certainly not wise to write one page. Once used ifream to implement, ha ha... Use a js file and pull one for each page. This is also OK. Every time ...

###rem adaptation Advantages: meta tags can be used to achieve proportional scaling Disadvantages: conversion is difficult Core idea: Based on REM, the element unit in layout is rem, and the font size of html root element is set to screen width rem adaptation: large design drawings and relatively many elements (750px,1080px) ...

Android can print multiple APP packages in the same set of code and install and run on the same mobile phone Android can print multiple APP packages in the same set of code and = = install and run on the same phone = =, and = = APP name and desktop icon are also different== Give different package names to the same set of code ...

Angular5 + custom form validator Custom Validators Labels (space separated): Angular First of all, the following problems are described: How to implement the verification of "reenter password" (equal value of two controller s) (equalTo) How to listen in the reverse direction (first enter "enter password again", then enter ...

First of all, in the html structure, add the class name to all the structures that need to be converted, preferably to the nearest parent containing the text, because we need to use the text node to replace them. Then construct data similar to json to facilitate replacement operation. You can also declare a variable flag to re ...

If the UI gives us a design size of 750 * 1340. Combined with the dynamic font size attribute, design draft size and collaboration process between the front end and design on the html element of the home page of Netease and Taobao mobile terminal, they are generally divided into the following two types: 1. Netease practice: ...

I. briefly In Android development, you often need to operate files. You have been unclear about the corresponding relationship between api and file path. Today, you have time to sort out the records so as not to forget them later. ps: since there is no machine with SD card in hand, the following test results are all on the m ...

The file downloaded by the wx.downloadFile interface of wechat applet is downloaded to the wechat server, and the return value is a temporary address. To save for a long time, call the wx.saveFile interface to save the file to the local cache. Although it is saved to the mobile phone, you cannot open it through the document man ...