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scene In Android, frame by frame animation is composed of consecutive pictures. Effect     Note: Blog: https://blog.csdn.net/badao_liumang_qizhi Pay attention to the public address Domineering procedural ape Get programming related ebooks, tutorials and free downloads. Realization First, prepare a group of photos with different expressions, ...

Automatic assembly of beans can simplify our code. Here is an example. First, create three entity classes package com.zhiying.pojo; public class Cat { public void shout() { System.out.println("miao~"); } } package com.zhiying.pojo; public class Dog { public void shout() { ...

Preface In the past, we used Fragment transactions to add, delete, replace and so on. For rapid development, we will also encapsulate a Fragment controller ourselves. Last year, Google launched its Navigation library with the goal of managing fragments more elegantly. text Let's first review Fragment's transactions: fragmentManager.beginTransa ...

Catalog Three components of JavaWeb Filter 1. Workflow 2. Use scenario 3. Implementation process of filter method 4. Login permission verification case Three components of JavaWeb Filter 1. Workflow The client sends the http request to enter the filter first and execute the relevant busines ...

1. Set up non-editable and clickable events 2. Set non-editable and no click event 3. Set Editable 4. Source Code 4.1 XML Layout 4.2 Java Code V. Summary 1. Set up non-editable and clickable events public void setCanNotEditAndClick(View view) { etContent.setFocusable(false); etContent.setFocus ...

scene In Android, the brush uses the Paint class, and the Canvas uses the Canvas class to represent it. Basic steps of drawing First, write a custom view class inherited from view, then rewrite its onDraw method, and finally add the custom view to actvity. Effect     Note: Blog: https://blog.csdn.net/badao_liumang_qizhi Pay attention to the ...

This is a very simple question about sudo permission in Linux, at least it should be. Many times, I just want to append some content to / etc/hosts or similar files, but I can't do it in the end, because even if I use root, I can't use > and > > at the same time. Is there a way to make this work without su or sudo su becoming ro ...

What is the difference between the margin and fill of the view? #1st floor Filling is the space within the boundary between the boundary and the actual image or cell contents.A boundary is the space outside the boundary between the boundary and other elements next to the object. #2nd floor Sometimes you can achieve the same result b ...

scene Show notification effect on status bar     Note: Blog: https://blog.csdn.net/badao_liumang_qizhiPay attention to the public address Domineering procedural ape Get programming related ebooks, tutorials and free downloads. Realization Create a new NotificationActivity and get the notification manager through the getSystemService method. T ...

Acquisition and initialization of Configuration LoggerContext is introduced in the previous article. One of the main functions of this class is to convert the structure of the configuration file into Java objects, such as Appender and Logger, according to the configuration file. Configuration is mainly managed by the configuration class. This ...