how to reduce data usage on android

Service Concept and use:Android service, it is different from the activity, it is unable to interact with the user, can not start, run in the background of the program, if we quit the application, the service process is not finished, it is still running in the background, then when we will use the service? For example, when we play music, we may want to listen to music while doing some other things, when we quit playing music application, if we do not use the service, we can not hear the song, s

Android does not need to parse explicit intent because the target component is clear. Android needs to parse implicit intent, map intent to the activity, intentreceiver, or service that can process the intent.The intent parsing mechanism mainly finds the matching intent by finding all intentfilters registered in androidmanifest. XML and the intent defined in them. In this parsing process,

activity, eliminating the ability to manage the cursor.1. This method uses the premise that there are a lot of data records in the cursor result set.Therefore, before using, the cursor is NULL to determine if the cursor = NULL, and then use this method 2. If you use this method, you will end up using Stopmanagingcursor () to stop the error. 3. The purpose of this method is to give the retrieved cursor object to activity management so that the cursor'

Android Intent usage for beginners First, for Android development, Android studio 2.0 is currently popular in the world. (Hh learns to use this in the book ,,) In the future, we will set a plan to update an Android notebook every day. Let's increase our self-control !!! (

Intent objects play a major role in Android Application Development, for example, activating components (such as activity and service) or carrying data functions. We believe that these functions are often used in development, intentions in Android are classifiedExplicit intentAndImplicit intentExplicit intent should be used more often, but implicit intent is also

This article only introduces the common usage of the ListView control. For details about ListView, please go to the details of the attributes and methods of ListView. 1. Procedure for using ListView ListView usually has the following three elements: (1) Layout of each entry in ListView; (2) Fill in the content into the ListView; (3) The Adapter that integrates the content with the page. Therefore, you can follow these steps to use ListView: (1) create

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

Friends who often surf the internet will be more worried about the amount of traffic they use every month, although the operator can query the flow of usage, of course, you can also use the mobile phone with the flow monitoring or some mobile phone software to understand the approximate flow of the use of the situation, so that we can use the flow of each month in our grasp. Note: The following methods are local software monitoring values, f

Last time I introduced you to the basic information and usage process of SQLite. I believe my friends have some knowledge about SQLite. Today, I will share with you how to use SQLite in Android. Currently, mainstream mobile devices such as Android and iPhone all use SQLite as the storage engine for complex data. When w

;Options.injustdecodebounds = false;Bitmap bmp = Bitmapfactory.decodefile (path, options);Image.setimagebitmap (BMP);So that while we can get the size of the imageview we expectBut when executing bitmapfactory.decodefile (path, options), it does not save memory. To save memory, you need to use the Insamplesize member variable in the Bitmapfactory.options class.We can calculate this value based on the actual width of the picture and the height of the width we expect. Options.insamplesize = option

Transferred from: Sack Blog http://blog.sina.com.cn/s/blog_77c6324101016jp8.html one, handler definition: Span style= "font-family: ' Microsoft Yahei '; font-size:14px; " > Handler mainly receives the data sent by the child threads and updates the UI with this data in conjunction with the main thread to interact with the UI main thread. For example (1) You can send a message with handler and then