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Android Basic Layout Constraint Layout Google I/O 2016 released Constraint Layout, which is said to be very powerful. Let's explore it. gradle configuration compile 'com.android.support.constraint:constraint-layout:1.0.0-beta2' Reading Prerequisites: Familiarity with the Four Basic Layouts 1. Position control 8 boundary contr ...

With the separation of front-end and back-end, excuse documents become particularly important. springfox automatically generates API documents in the form of annotations. With it, restful API can be written easily. swagger is mainly used to show API documents generated by springfox. Official address: http://springfox.github.io/springfox/ Genera ...

In this article, we continue to look at other configuration elements. Today's protagonist is our <environments> element, which is used to set up the database configuration we need to access. Let's first look at the configuration: <environments default="development"> <environment id="development"> <!-- Use jdbc transa ...

file API The client directly accesses the files of the user's computer. Before 2000, the <input type="file"> field was added to the form. The file API is a secure way to provide web development, so that the client can better access the user's files and fields. Some interfaces directly accessing file information - files col ...

This chapter gives a brief description of Drawable resources. What you need to know is the various types of Drawable resources and their usage scenarios. Common types are Bitmap File, Nine Patch Drawable, StateList Drawable, Gradient Drawable. Drawable resources refer to graphics that can be drawn on the screen and retrieved or applied to ...

FLAG_ACTIVITY_NEW_TASK Label Configuration form: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.open.android.task5"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@str ...

Four common ways of parsing XML 1. Introduction to XML Language XML is an extensible markup language. It can define semantic markup (tag), which is a meta-markup language. Unlike HTML, which is a hypertext markup language, XML can only use specified tags. For XML, users can define tags they need. Tree model. XML (eXtensible Markup Language) ...

Recent projects need to generate two-dimensional codes, and decode to obtain information. jquery.qrcode.js generates two-dimensional codes to compare conveniently. Write a tutorial to share with you. Welcome to test the message, I will improve the code. Now two-dimensional code is becoming more and more popular, pay attention to scanning two ...

Foreword: The greatest advantage of custom composite control is reusability, which can save us a lot of code. But when we customize composite control, the encapsulated control is either used by ourselves or by others. The encapsulated code should be readable and easy to modify. There is no need to encapsulate too many attributes. Generally, it ...

Constraint Layout (Constraint Layout), the latest Android layout launched by Google I/O in 2016, is still in the perfect stage. It should become the mainstream layout style in terms of the strength of its launch. In the latest version of Android Studio, Constraint Layout has become the default layout. concept ConstraintLayout Constraints ...