Application Fundamentals 安卓应用的基础知识Android apps are written in the Java programming language. The Android SDK tools compile your code—along with any data and resource files—into an APK: an Andr

FragmentsIn this documentDesign PhilosophyCreating a FragmentAdding a user interfaceAdding a fragment to an activityManaging FragmentsPerforming Fragment TransactionsCommunicatin

System Permissions 系统权限Android is a privilege-separated operating system, in which each application runs with a distinct system identity (Linux user ID and group ID). Parts of the system are a

App Components 应用程序组件Android's application framework lets you create rich and innovative apps using a set of reusable components. This section explains how you can build the components that define t

Introduction to AndroidTo learn how apps work, start withApp Fundamentals.To begin coding right away, readBuilding Your First App.Android provides a rich application framework that a

在android官网网站上的 Develop > Training >  Displaying Bitmaps Efficiently > Loading Large Bitmaps Efficiently 章节看到的计算 BitmapFactory.Options.inSampleSize的算法，没看懂这逻辑（好吧，这其实怪我数学不好~~~ - -b）然后根据这个值的要求，我写了一段更符

ActivitiesIn this document 本文内容1.    Creating an Activity创建一个 Activity1.    Implementing a user interface实现一个用户界面2.    Declaring the activity in themanifest在 manifest中声明该 activity2.

Device CompatibilityAndroid is designed to run on many different types of devices, from phones to tablets and televisions. As a developer, the range of devices provides a huge potential audience

1. Android Studio 不能自动 import class android.os.Handler，而是直接 import class java.util.logging.Handler，这是什么鬼？难道是因为 Handler 实例不能直接 new？2. Android Studio 黄色警告，可能会有泄漏，这个怎么处理？final android.os.Handler