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Let's see the effect first   In the middle of the picture is the style of the input box. The number of input boxes, the spacing between each input box, the color of the input text and the bottom line can be changed dynamically. Next is the time to roll up the code 1. Now create attrs.xml in the values folder and copy the s ...

1. First apply for relevant authority. In manifest.xml <uses-permission android:name="android.permission.BLUETOOTH"/> <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/> <uses-feature android:name="android.bluetooth_le" android:required="true"/> <uses-permission-sdk-23 andr ...

1, Activity without any processing The listing file code at this time is as follows: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="org.chromium.chrome.browser.spacedemo"> <application android:allowBackup="true" ...

Article directory 1. Add operation 1.1 add 'insertUser()' method in UserMapper interface 1.2 configure add operation in Mapper mapping file 'UserMapper.xml' 1.3 test add operation 1.4 test results 2. Delete 2.1 add the 'deleteUserById()' method in the UserMapper interface 2.2 configure deletion in ...

forEach iteration tag: This tag is used to iterate over a series of objects in a Collection set and can specify the number of iterations. The general format used is as follows: <c:forEach items="collection" var="varName" [varstatus="varStatusName"][begin="begin"] [end="end"] [step="step"]& ...

There are a lot of spring source code analysis tutorials and class diagrams on the Internet, but the source code of spring is very complex, one layer is nested, and it's hard to see at the beginning. The more you look, the more muddled you become. So I bought the book "spring source code deep analysis". Follow the boo ...

I'm laying out the login Activity form for my Android app. Here's what I want to look like: I can use the following XML to implement this layout. The problem is, it's a little shocking. I have to hard code the width of the host EditText. Specifically, I must specify: android:layout_width="172dp" I really want to give the host and po ...

Reprinted from Reading the source code of mybatis (2): initialization of mybatis 1. Initialization entry //Mybatis obtains SqlSession through SqlSessionFactory, and then can interact with the database through SqlSession private static SqlSessionFactory getSessionFactory() { SqlSessionFactory se ...

A small feature in the project that toggles between visible and invisible passwords. Design sketch:         Code:           public class PwdActivity extends AppCompatActivity { public static void startActivity(Context context){ Intent intent = new Intent(context, PwdActivity.class); context.startActivi ...

Article directory XML: 1. concept: 2. syntax: 3. Parsing: operate the xml document and read the data in the document into memory XML: 1. concept: Extensible Markup Language *Extensible: labels are all customized. <user> <student> * function *Store data 1. Profile 2. ...