how to reduce data usage on android

Android IntentService usage and source code analysis, androidintentIntroduction Service is one of the four major Android components and plays a very important role in Android. Service is a working UI thread. When your application needs to download a file or play music, and is working in the background for a long time,

1. parcelable InterfaceInterface for classes whose instances can is written to and restored from a Parcel. Classes implementing the Parcelable interface must also has a static field called CREATOR, which is an object Implementin G The Parcelable.creator interface.2. the implementation of parcelable is for serialization, so why Serialize? 1) Permanently save the object, save the object's byte sequence to the local file;2) passing objects through a serialized object in the network;3) Passing objec

1. parcelable InterfaceInterface for classes whose instances can is written to and restored from a Parcel. Classes implementing the Parcelable interface must also has a static field called CREATOR, which is an object Implementin G The Parcelable.creator interface.2. the implementation of parcelable is for serialization, so why Serialize? 1) Permanently save the object, save the object's byte sequence to the local file;2) passing objects through a serialized object in the network;3) Passing objec

in one activity, Then the value of the other activity in the same application will change.The life cycle of an Application object is the longest in the entire program, and its life cycle is equal to the program's life cycle. Because it is a global singleton, the objects obtained in different activity,service are the same object. So you can do some things through application, such as: data transfer, data sh

In the Android system, when we click the menu button, the menu option of menu will pop up, one of which is the setting option, after clicking the setting option, the system setting activity interface is displayed. How are these settings implemented? The Android system uses preferenceactivity to configure and manage system information. How does it save data and cr

14:32:57.722:v/welcomeactivity (8085): onactivitycreated10-21 14:32:57.762:v/welcomeactivity (8085): Onactivitystarted10-21 14:32:57.762:v/welcomeactivity (8085): onactivityresumed10-21 14:32:59.164:v/ Welcomeactivity (8085): onactivitypaused10-21 14:32:59.194:v/mainactivity (8085): onactivitycreated10-21 14:32:59.224:v/mainactivity (8085): onactivitystarted10-21 14:32:59.224:v/mainactivity (8085): Onactivityresumed10-21 14:32:59.735:v/welcomeactivity (8085): onactivitystopped10-21 14:32:59.735

This article explains how to use Surfaceview, which is designed to help you quickly get started with surfaceview development. Since the previous article "Android Development: Surfaceview basic Usage summary and development problem sharing " is poorly typeset, a separate introduction to Surfaceview's basic usage summary.Reprint Please specify author xiong_it and l

Android Program-National Weather Forecast query (aggregated data development), android Weather Forecast I. project demonstration effect: Project source code:Http://yunpan.cn/cZVWIieuFyK9I access password 2eac Ii. Use the aggregate data SDK: (1) aggregated data official we

Implementation of the cpu usage curve of android! Recently, I made an effect: Add "about mobile phone" in the mobile phone settings to display the cpu usage curve of the current mobile phone! Shows the implementation result: The first item about mobile phones is what I want to achieve! Let's talk about how this curve view (cpu_speedcurve_view) is implemented tod

This two-day review of Android service knowledge, before the memory fades, to summarize. This article mainly explains the basic concept and use of service, the use of cross-process call service, System common service. So this article is very difficult, only for the students who want to review the service knowledge points, or do not know the service of the classmate, as to the service source and other things, such as the analysis of the past, and then

Handler usage (2) I. Relationship between Handler and threadBy default, Handler is in the same thread as the Activity that calls it.For example, in Example 1 of Handler's use (1), although the thread object is declared, it does not call the start () method of the thread in actual calls, instead, it directly calls the run () method of the current thread. Let's use an example to confirmExample 1: an Android A

There are two common uses of content providers, one is to use existing content to read and manipulate data in the corresponding program, and to create your own content provider to provide external access to the data of our programs. First of all, let's learn the first kind.If an application provides external access to its own data through a content provider, othe

been successful. Each time the Onstartcommand method is called, the start ID is different, and the boot ID is used to distinguish between different commands; OnDestroy method: Called when the service is stopped. 2.onCreate method: First, let us look at the OnCreate method in Intentservice source code, @Override publicvoidonCreate() { super.onCreate(); new HandlerThread("IntentService[""]"); thread.start(); mServiceLooper = thread.getLooper(); ne

Original address: http://blog.sina.com.cn/s/blog_7ab107b00100u78t.html sharedpreferences Introduction:Do software development should know, a lot of software will have configuration files, which is stored in the program running the various property values, because of its configuration information is not much, if the use of database to store is not cost-effective, because the database connection and operation time greatly affected the efficiency of the program, So we use the corresponding relation

Android xmlns: tools usage, androidxmlns In Android development, the layout file contains the following content: Xmlns: tools = "http://schemas.android.com/tools" Android: orientation = "vertical" Android: layout_width = "match_parent"