Android

File processing tool File Processing: Common Operations: Obtain the absolute path and relative path of the file or folder. String path = File. getPath (); // relative path String path = File. getAbsoultePath (); // obtain the parent directory String

Data sharing of the ContentProvider component in Android Functions and meanings of ContentProvider: It is mainly used for external data sharing, that is, using ContentProvider to share the data in the application to other applications for access.

Bluetooth for AndroidI. Bluetooth package Introduction The Android platform provides an android. bluetooth package that enables communication between bluetooth devices. There are a total of 8 classes, and the four frequently used classes are as

RecyclerView for Android development and Android recyclerview RecyclerView is a very useful control. Its effect is similar to that of ListView. It can be said that the appearance of RecyclerView replaces ListView's RecyclerView is more flexible and

Android component-based development (2)-RadioButton matrix for grid layout **Preface **In Android, we usually use RadioGroup to manage a set of RadioButton to achieve the mutex effect of single-choice buttons. However, in some requirements, the

Android prompt & dialog box ---- Notification, android prompt Notification (status bar Notification) 1. Notification is used to display notifications in the status bar. The Notification is different on different devices. Ii. basic layout of

What does the pull request on git mean ?, Gitpull   1. git has common pull request Functions   2. Meaning of pull request Explanation 1:There is A warehouse called Repo. If you want to contribute code in, you need to Fork the Repo first, so

Transparent notification bar for Android development and implementation, and android notification bar This feature is supported by andorid4.4 and can be used at least by api19. That is to say, if the Android host is lower than 4.4, the immersion

Android Notification introduction, androidnotification To add a Notification, follow these steps: 1: Obtain icationicationmanager: Icationicationmanager m_NotificationManager = (NotificationManager) this. getSystemService (icationication_service ); 2

Analysis of SIMLock and simlock Functions I. background The lock card is SIMLock. When the mobile phone is started or SIM card is inserted, the configuration information preset in NV on the modem side of the mobile phone will be compared with the

About three-level caching in Android, Third-level cache is proposed to improve user experience. When we first open the application to retrieve images, we first download images from the network, and then store them in the memory cache and disk cache.

Special usage of Android -- split () to split strings, csplit to separate stringsSplit () split string 1. Differentiation in different environments Java: The split string cannot be written as split ("$") // $ is the character to be split.Android:

Json generation and resolution, Json generation and resolution   JSON is commonly used for data interaction with the server. "{}" in JSON indicates JSONObject, and "[]" indicates JSONArray. Json data is as follows: 1 {"singers": [2 {"id": "02",

Android --- flash pages and countdown, android --- countdown The implementation of android flash frequency is very simple. It can be implemented using the postDelayed () method of the Handler object. In this method, a Runnable object and a delay

Phase 1: parse JSON and parse JSON "Phase 1" means the first time I systematically studied Android development. This is mainly to record my learning process.   Recently I learned to parse network data in JSON format, and the job also asked me to

For pictures taken by calling the system in android, the returned image is rotated 90 degrees, Reposted blog: http://blog.csdn.net/walker02/article/details/8211628 A problem encountered during project development: When Samsung's mobile phone was

Android performance optimization, android This chapter describes the performance of android advanced development. It mainly includes three performance knowledge points: power, view, and memory.1. View performance (1) Overview of Overdraw Overdraw

Android source code for an IT reading and Learning application and Android source code for it learning BingoWorld introduction BingoWorld is an open-source IT reading and learning software. IT will have a wealth of learning content in the

Android Application SignatureSign Android applications The Android app uses its package name as a unique identifier. If two apps with the same package name are installed on the same mobile phone, the apps installed later will overwrite those

Android programming tips (continuous)First: Intent jump is generally used for Activity class, but if you want to jump in a non-activity class, the solution is to add mContext before startActivity (intent), that is, context, and finally mContext.