gettag android

tag is introduced. It may not be the best approach, but it does make the ListView smoother. Code, when Convertview is empty, use the Settag () method to bind a Viewholder object that holds the control for each view. When Convertview is not empty, reusing a view that has already been created uses the Gettag () method to get the bound Viewholder object, which avoids the findviewbyid of a layer query on the control and quickly navigates to the control.▲

This course solves the problem of how to understand the beginner's mind of Android architecture design and develop a featured product with Android system with deep customization and soft and hard integration capability.The course takes the five core of Android: HAL, Binder, Native service, Android service (and the exam

Android learning route (19th) Supports different devices-Supports different (Android) platform versions and android routes When the latest Android version provides great APIs for your application, you need to continue to support the old system version before more devices are updated. This course describes how to use th

(1)Android SDK (Android SDK master installation package, including SDK Manager, AVD Manager, Toolkit tools, released root folder android-sdk-windows): Revision 22.2.1http:// Dl.google.com/android/android-sdk_r22.2.1-windows.ziphttp://dl.google.com/

Android's NDK development I. Background of the creation of NDK Since its inception, the Android platform has supported C and C + + development. As we all know, the Android SDK is based on Java implementation, which means that third-party applications that are developed based on the Android SDK must use the Java language. But this is not equivalent to "Third-par

This article introduces the JUnit-based Android testing framework. 5. androidtestrunner As we learned more, we found that android was ignored in the previous section. an important class in the test package, androidtestrunner, is Android. the core class of the test package is described in detail below and some related content is provided. Testlistener interface in

Android automated testing (1) concept of Android automated testing principles and Android principles I. First, let's talk about the principle of automated mobile phone testing.1. The principle of mobile phone automated testing is that a control terminal (Test Tool) on the PC is connected to an agent terminal on the mobile phone through serial port, USB, or wirele

Talking about Android Application protection (I): The basic method for reverse engineering of Android applications, and talking about android There are many methods and ideas for unprotected Android apps to conduct Reverse Analysis and attacks. By using some basic methods, you can break the confidentiality and integrit

From the perspective of enterprise-level business practice, 24 hours through 23 hands-on practical cases, the gradual progress of the Android business-level application development points conquer, Based on years of Android (6 complete hardware products and more than 20 application software) development and enterprise-level training experience (more than 150 times Android's enterprise internal training and p

Android: Network Operations in android and android There is no difference between network operations in android and java. Many network operation methods in java can be moved to android for use. The main points are as follows: 1. Differences between post and get requests. You

Android development interview: 6. FAQs from common interviewers: Android question ② (updating...), android updated Follow finddreams blog: http://blog.csdn.net/finddreams/article/details/445600611. What are their respective advantages and disadvantages of HttpURLConnection and HttpClient? HttpUrlConnection versions earlier than 2.3 have bugs. Therefore, HttpClie

Learning about open-source android projects and open-source android ProjectsThis article collects a relatively good open-source Android project. Researching open-source projects is the best way to master the Android platform. The core development team of Android provides 15

MediaPlayer is implemented at the underlying layer based on the OpenCore (PacketVideo) Library. To build a MediaPlayer program, the upper layer also contains inter-process communication and other content, the basis for inter-process communication is the Binder Mechanism in the basic Android library.In today's example, we only use MediaPlayer to play a beautiful English brother love foolton In the res/raw folder. The program has three ImageButton butto

From the perspective of enterprise-level business practice, 24 hours through 23 hands-on practical cases, the gradual progress of the Android business-level application development points conquer, Based on years of Android (6 complete hardware products and more than 20 application software) development and enterprise-level training experience (more than 150 times Android's enterprise internal training and p

Many open-source Android projects are recommended:Android learning Source Code Address: http://www.cnblogs.com/TerryBlog/archive/2011/04/18/2019907.html Http://blog.csdn.net/join_wangzi/article/details/8065227 Shares the source code of 45 Android instances, which is very powerful.Http://www.apkbus.com/android-20978-1-1.html Andriod alarm source codeHttp://www.a

One, all caused by a run-time error DALVIKVM Could not find class ' reference package. Class ', referenced from method ...In fact, at compile time will also see the following error:[DX][DX] Trouble processing:[DX] Bad class file Magic (Cafebabe) or version (0033.0000)[DX] ... while parsing com/novell/sasl/client/digestchallenge.class[DX] ... while processing com/novell/sasl/client/digestchallenge.classSecond, try 1. Using JDK7It is recommended to use JDK7 to solve similar problems, but I did not

[Android] the Android program is automatically updated and the android program is automatically updated. The steps for automatic App update are as follows: The following three steps will be explained, with the corresponding code interspersed. The three steps of automatic App update are encapsulated into a separate Updater class and can be used directly, I will p

Android development self-study note (Android Studio1.3.1)-3. Android Application structure parsing, androidstudio1.31. What is the R file? Permission Description ACCESS_NETWORK_STATE Allow applications to obtain network status ACCESS_WIFI_STATE Run the application to obtain the WIFI status BATTERY_STATS Allow applications to obtain Battery status

Add more buttons at the bottom of the Android Demo tour ListView to implement data Paging In our actual project, there should be a lot of data, and our ListView cannot load all the data at once. We can scroll to the bottom of the ListView, for more tips, when we click it to load the data on the next page, it is equivalent to our paging effect. For more information, refer to the online content and write a small demo, some knowledge points are summarize

configuration, you must call the init () function to make the configuration take effect. // fb. configBitmapLoadThreadSize (int size) // fb. configBitmapMaxHeight (bitmapHeight )} /// // adapter getView /////////// /// // public View getView (int position, view convertView, ViewGroup parent) {ImageView iv; if (convertView = null) {convertView = View. inflate (BitmapCacheActivity. this, R. layout. image_item, null); iv = (ImageView) convertView. findViewById (R. id. imageView); iv. setScaleType