Android

The XML file generated by the application is saved in/data/application package name/shared_prefs/name. xml. (/Data/Data/COM. sinaapp. Shared/Shared_prefs/ssun. XML) Sharedpreferenceactivity. Java source code: Package COM. sinaapp. shared;

The android source code directory hardware/RIL/libril contains a total of five C/CPP files: ril_commands.h, ril_unsol_commands.h, ril_event.h, ril_event.cpp, and rIL. cpp. This article mainly analyzes the RIL. cpp file. We can divide the file into

The android source code directory hardware/RIL/libril contains a total of five C/CPP files: ril_commands.h, ril_unsol_commands.h, ril_event.h, ril_event.cpp, and rIL. cpp. This article mainly analyzes the two headers related to commands. These two

The text messaging software for Android, such as Mi text messages, has a conversational chat effect. I personally feel very good. Now I can simply imitate it. The effect is as follows: To achieve this, two different XML layout files are

This article introduces how to implement the four string output functions and corresponding enumeration types in some codes in RIL. cpp. First, let's take a look at Code. Its function is to convert the commands in ril_command.h and

Thread When an application is started, the system creates an execution thread called "Main ". This thread is very important because it is in charge of dispatching events to user interface controls. This includes drawing events. It is also your

Create a context menu A context menu is similar to a context menu on a PC. you should use the context menu to provide the action selection function for a part of the user interface. in Android, a context menu appears when you press an interface

Fragment is a part of the activity interface or an action. You can combine multiple fragment members into an activity to create a multi-faceted interface, and you can reuse one fragment in multiple activities. You can think of fragment as a

In the Android system, the path for storing Different ringtones is as follows: /System/Media/Audio/ringtones ringtone/system/Media/Audio/notifications SMS notification ringtone/system/Media/Audio/alarms alert ringtone Ringtone settings: Import Java.

Handle system configuration changes Many devices can change system configurations during operation, such as screen orientation, keyboard layout, and language. When similar changes occur, the system will restart the running activity (call ondestroy ()

Asynctask allows you to execute asynchronous work on your interface. It executes time-consuming operations in a work thread and sends the results to the interface thread. You do not need to manage the thread and handle yourself. To use it, you must

Thread Security In some cases, the methods you implement may be called in different threads, so they must be implemented as "thread-safe ". This is first reflected in methods that can be called remotely-for example, methods in boundservice. When a

This document introduces viewimage. Java and viewmap. java. The former allows you to browse a single image, and the latter allows you to customize a map to display the image shooting location and the current location of the user. The activity

This article describes how to use telephonymanager to obtain the SIM card status and mobile network information. It mainly uses the telephonymanager. Listen function. The source code of this function is as follows: Public void listen

The loader was introduced from android3.0. It makes it easy to load data asynchronously in activity or fragment. The Mount device has the following features: They are valid for each activity and fragment. They provide the ability to load data

When beginners try to jump between activities in different Java package directories, they often get activitynotfoundexception at runtime. Next let's take a look at the implementation of activity jump under different package directories. First, we

Open-source projects almost all use version control systems to maintain code. The famous version control software include CVs, rational clearcase, Microsoft Visual sourcesafe, git, subversion, mercurial, and so on. Of course, some of the above are

This article continues to explain the implementation of panoramio, mainly introducing imageadapter. java and imagelist. the two java files implement the following interface. The figure on the left shows the effect after the data is loaded from the

Ui programming is usually accompanied by event processing, and Android is no exception. It provides two methods for event processing: callback-based event processing and listener-based event processing. For listener-based event processing, it is

Modify main. Java and call the previous class to obtain the RSS list from intentert and display it on the UI: Public final string rss_url = "http://blog.sina.com.cn/rss/1267454277.xml"; // get the RSS address from the networkPublic final string tag =