Analysis of Android source code design patterns and practices (15th)Chapter 2 template method mode
The template method pattern is the simplest behavioral design pattern, one of the most common patterns in all patterns, and is the basic technology based on inherited code re
Android Adaptive Layout Design Skills
Because the current app needs to adapt to mobile phones and tablets, I am studying how to build a layout that can adapt to all screen sizes.
I have a lot of experience in adaptive web layout, such as using grid streams and media queries attributes in CSS3, which can achieve adaptive web layout. So I want to try it on Android
Use of iconsIcons can give the most intuitive impression, sometimes a lot of explanations can not be an icon.The Android app's icons are divided into two categories,
App icon: The start icon that represents the entire app on the main screen, is the icon that gives the user the first impression. A successful application development will not be downloaded by users, perhaps depending on the user to see its first eye.
System icon: The use of
Currently, the competition on mobile platforms is becoming increasingly fierce. friendly user interfaces can help improve user experience satisfaction. Icon is an important component of user interfaces, today, we will study and learn about the icon design specifications of the Android system. Under discussionAndroid icon designPreviously, it was necessary to first understand how the
在2015年的GoogleIO大会上。具体的Material Design设计规范出炉了。全新的Android Design Support LibraryPane What's even more enjoyable is that these cool styles can be made from the Android Design support library to the lower version number to the Api==82.2 Version number, this cannot be said to be
worlds, he le?!So, how do you enhance the security of the applications that you intend to develop? First of all, you can use Safe.ijiami This tool to detect what you develop the application package is vulnerable to hackers, a two-minute event, you can clearly know The security risks and vulnerabilities of the APK, Finally, a detailed report can be generated. Then, according to these vulnerabilities and then do the corresponding encryption protection measures! Don't worry, different application
positioning are unified:(full Asset) red border is icon sizeThe blue border (icon) is a graphic size that is slightly smaller than the icon size and is used to display shadows and special effects outside the graphic.The Orange border (Square Icon) is a different graphic size. Two types of graphic dimensions can achieve uniform visual weights.Icon dimensions for high-density (hdpi) screens:Full asset:72 x pxicon:60 x pxSquare icon:56 x pxIcon Dimensions for Medium-density (MDPI) screens:Full ass
In my article and video "How to become an android guru", the author proposed some guidelines that must be mastered and followed to become a real Android guru:
1. Learn laziness
2. proficient in Android architecture, MVC, common design patterns, and IOC (inversion of control)
3. write code with high reusability, scalabi
animation gap to do the memory mismatch work.Let's talk about how to improve the efficiency of some common methods.
OnDraw () method
OnDraw () method, we should minimize the call of the OnDraw () method, also called the Invalidate () method, and if there is a need to call the invalidate () method, you should also call the Invalidate () method with parameters for precise drawing, Instead of the invalidate () method without parameters, because the invalidate () method without parame
After several months and everyone's efforts, mobile phone QQ browser (Android version) from 2.0 gradually updated to 2.6. After a constant attempt at the inscrutable and architecture of the design, a new look has been made, and the experience has improved considerably from previous versions. However, this is only long March first step, here to share with you the first step behind the
packages you develop are vulnerable to hacker attacks, a two-minute event, you can clearly know the security risks and vulnerabilities of the APK, and finally a detailed report can be generated. Then, according to these vulnerabilities and then do the corresponding encryption protection measures! Don't worry, different applications have different solutions, learn more about the mouth:http://www.ijiami.cn/appprotect_mobile_games 9. Abide by the platform guiding principle while your goal is to c
between the intrinsic state (the Internal state) and the outer States (External).
Bridge mode
Decoupling abstractions and implementations so that they can vary independently.The bridge model is intended to "decouple abstraction (abstraction) from implementation (implementation) so that they can vary independently".
A very typical example of bridge mode in Java applications is the JDBC drive. JDBC provides a common interface for all relational databases. An application dy
When using Timer in Android, you need to access TimerTask, Handle, and other classes at the same time. The procedures are complicated and the things you really want to do are drowned in the procedural code. This document introduces the SafetyTimer class, which hides TimerTask and Handle classes and provides a simple and low-coupling implementation mode through the Observer design mode.First, let's take a lo
The use of colorMaterial DesignWith a flat design, you can see the color of a large chunk of area. Most of these colors are bright and attractive, the whole interface with the color will not be too much, basically maintained in three colors within."There is no wrong color, only the wrong collocation." There is no right or wrong color, we need to use experience and intuition to match them, so we should first
driver. JDBC provides a common interface for all relational databases. An application system dynamically selects an appropriate drive and sends commands to the database engine through the drive. This process delegates the abstract role behavior to the role.
Project
Wrote an Android project to reflect the design pattern in 23, Project
Test code:
Public void onClickSingleMode (Vi
When you start to design a new pendant or update an existing pendant, you can look at the design template below. The following package is available for download, he contains a. 9.png background picture and XML and some PS files for different pixel densities
The following is an instance source code
* * Copyright (C) 2009 the
Axure RP is a well-known interface prototype design tool that can flexibly and quicklyProgramDesign prototype.
Recently, I want to develop an android client and use axure RP to design a prototype.
Axure RP does not have a mobile terminal template by default. I found an android
Samsung has always had a tradition of customizing the Android interface, with the TouchWiz interface installed in a variety of Galaxy devices. Now, the Galaxy S5 Android interface has been exposed, science and technology website Sammobile exclusively issued a number of Galaxy S5 system interface, let's take a look at it.The system interface of these Galaxy S5 is mainly about Samsung's voice assistant applic
characteristics, each card should be based on the characteristics of individual to pick, I am a person who make clear, or to find flower shop owner and gift shop boss to do a VISITOR, Let flower shop boss according to the characteristics of the MM pick a bouquet of flowers, so that the owner of the gift shop also according to each individual characteristics to choose a card, so much easier;
Visitor mode: The purpose of the visitor pattern is to encapsulate actions that are applied to some data
Article Description: Android 4.0 Platform interaction analysis.
Android4.0 inherits 3.0 of design multitasking, rich notifications, customizable main interface, resizable controls, interactive elements for interaction and sharing. The structure of the application is maturing and almost unchanged, to see how the main interface of the system embodies its design
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