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Please indicate: https://mp.csdn.net/mdeditor/82504849 Bottom navigation bar radiogroup + fragemt 1. First, create a new selector file in drawable, right-click new - > drawable resource file in drawable, and create a text color selector [u text] and four other picture selectors [u home] drawable, selector [u phone] drawab ...

Android Development - Android Studio - front end introduction picture 1. Create a new Activity named ImageViewActivity 2. Set the button in activity main.xml to 3. Declare ImageViewActivity in MainActivity and set click event. package com.example.ayb.helloworld; import android.content.Intent; import android.support.v7. ...

I studied MVP before, but it didn't work for a long time. Today I watched it again. In fact, MVP is the upgraded version of MVC. MVP includes M-Model-model, V-View-view and C-Controller-controller. Make a simple example, simple login. First, create a new project and create a layout. <?xml version="1.0" encoding="utf-8"?&gt ...

Extract this note from: https://www.cnblogs.com/yaozhenfa/p/CSharp_Linq_For_Xml.html And record the learning process for future reference. 1. Generating xml 1.1 Create simple xml /// <summary> /// CreateXml class /// </summary> public class CreateXml { /// <summary> /// Return xml File Path ...

Basic overview People who have used dynamic languages believe that it is very easy to parse JSON. You only need a few lines of code to get the parsed JSON object. For example, Python parses JSON as follows result = {"name": "Bob", "age": 18} print(result["name"]) // "Bob" The simple data structure in Golang language can use map[string] ...

Into the pit Today, when inserting data into mysql, I accidentally used format and found a small pit Let's look at a piece of code: My data: 72 232 2022/11/01 231 233 2022/01/01 231 234 2022/12/01 Database: +---------------+------------------+------+-----+---------+----------------+ | Field | Type | Null | ...

0. Preface Log recording is essential to the system. The commonly used log components in spring boot include log4j, logback and log4j2. Logback is the default of spring boot and has been brought by itself. You can choose log4j2, and others don't need to pay attention; 1, Integrated log4j2 log component 1. Remove the default logback log frame ...

Catalog I. FloatingActionButton II. Snackbar III. CoordinatorLayout IV. CardView I. FloatingActionButton 1, effect For example, the button in the lower right corner: 2, use <android.support.design.widget.FloatingActionButton android:id="@+id/fab" android:layout_width="wrap_content" ...

1. The reading and writing of stream based text files is relatively simple for C ා. Generally speaking, the following five basic steps are required: Create a file stream -- FileStream Create reader or writer - StreamReader/StreamWriter Perform read or write operations Close reader or writer Close file stream 2. BinaryReader an ...

About uploading pictures in HTML It is worth noting that when a form contains this upload element, the enctype of the form must be specified as multipart / form data, and the method must be specified as post, so that the browser can recognize and correctly execute it. But there is another point, the browser only allows users t ...