心空则灵

摘要： package think.in.exercise10;/** * @author Administrator * think in java 第5章 * * think in java 第5章 无限构建 * 下面两个成员 memberA,memberB,不用static修饰 * * Exception in thread "main" java.lang.StackOverflowError * at think.in.exercise10.UnableInit.<init>(UnableInit.java:10) * JA... 阅读全文

摘要： package think.in.exercise10;/** * * @author Administrator * think in java 第8章 多态 * 复盖私有方法的缺陷 */public class PrivateOverride{ private void function() { System.out.println(" PrivateOverride.function()"); } public static void main(String[] args) { /** * 陷井: * 子类方法与超类方法签名相同，超类方法是private的... 阅读全文

摘要： package think.in.exercise10;/** * 第8章 多态 * @author Administrator * 输出结果表明 ： * Sub的对象，发生向上转型后，调用fistMethod()时，调用的是基类的fistMethod()方法。因为 * Sub类没有这个方法.在基类中的fistMethod()方法中，调用secondMethod()方法时又调用了 * 子类Sub中的secondMethod()方法，而不是基类中的secondMethod()方法. * 结论: * 子类对象在发生向上转型后，该对象调用的方法，在子类中不存在，则调用基类的。 * ... 阅读全文

摘要： In an Android application, the user interface is built using View and ViewGroup objects. There are many types of views and view groups, each of which is a descendant of the View class.在Android应用中，用户界面是用 View和 ViewGroup对象构建的。有许多的views和view组类型，它们都是View类的后代。View objects are the basic units of user inte 阅读全文

摘要： Processes and Threads 进程和线程When an application component starts and the application does not have any other components running, the Android system starts a new Linux process for the application with a single thread of execution. 当一个Android应用组件开启时，并且该应用没有任何其他组件在运行，Android系统为该应用开启一个新的进程，并带有一个执行的线程.By 阅读全文

摘要： Content Providers内容提供者In this document本文档1. Content provider basics 内容提供者基础2. Querying a content provider 查询内容提供者3. Modifying data in a provider 修改内容提供者数据4. Creating a content provider 创建内容提供者5. Content URI summary 内容URI总结Key classes关键类1. ContentProvider 内容提供者2. ContentResolver 内容解释者3. Cursor 指示器(指针 阅读全文

摘要： Bound Services邦定服务A bound service is the server in a client-server interface. A bound service allows components (such as activities) to bind to the service, send requests, receive responses, and even perform interprocess communication (IPC). A bound service typically lives only while it serves anoth 阅读全文

摘要： The Android framework includes support for various cameras and camera features available on devices, allowing you to capture pictures and videos in your applications. This document discusses a quick, simple approach to image and video capture and outlines an advanced approach for creating custom cam 阅读全文

摘要： A Service is an application component that can perform long-running operations in the background and does not provide a user interface. Another application component can start a service and it will continue to run in the background even if the user switches to another application. Additionally, a co 阅读全文

摘要： 包名:DDMS开启后，infoIntent intent = new Intent (Intent.ACTION_MAIN);//只要桌面上能看到的都能调用intent.setPackage("com.android.deskclock");startActivity(intent); 阅读全文