messenger application for android

The Android Exit application calls Android.os.Process.killProcess (Android.os.Process.myPid ()) or system.exit (0), which is only for the first activity ( Which is the entry activity). If you have a a,b,c of three activity, and you want to quit in B or C, calling the above method, you will often destroy the current activity and return to the previous activity. Of course, you can return to the previous activ

In the previous article, we analyzed the creation process of the runtime context of the Android application window. It follows that each activity component has an associated Contextimpl object, and It also associates a window object to describe a specific application window. It is also known that activity is nothing more than a highly abstract UI component, and

indicates that the Service and UI (Activity) are not executed in the same process, but are executed in different processes. 2. The Android Application starts and stops the Service in the Activity. 3. The override onStart () method is started in the Service to execute the desired background function. 4. When the onDestroy () method is stopped, the background function is stopped. The specific implementation

-GCC--sysroot= $SYSROOT "CFLAGS="- March=armv7-a-mfloat-abi=softfp-mfpu=neon ' ldflags= '-wl,--fix-cortex-a8 ' $CC [email protected]http://www.srombauts.fr/2011/03/06/standalone-toolchain/#include The above code can be compiled like this./b9-l Log Nl.c-o HNYou can do it with makefile.CC = Arm-linux-androideabi-gcccflags =-wall-gldflags =-llogsrc =hello-ndk.cobj =$ (src:.c=.o) EXE = Hello-ndkall: $ (SRC) $ (EXE) $ ((EXE) $ (OBJ) $ (CC)-o [email protected] $^ $ (ldflags)%.O:%.c $ (CC)-O [

Version control is an important part in the process of program upgrade/maintenance. You need to know the version of the application installed on the device and the versions that can be upgraded. Other applications-including other programs you release-need to query the system for the version of your application to determine the compatibility between them. You may also need to query the ve

In the previous article, we analyzed the creation process of the runtime Context Environment in the Android Application Window. It can be seen that each activity component has an associated contextimpl object, and it also associates with a window object to describe a specific application window. It can be seen that activity is only a highly abstract UI component,

Android AIDL practices: Clearing application cache, androidaidl 1. Put the following two aidl files in your own project. Your project is regarded as a client for cross-process communication. The Code is as follows: Create package name: /***** Copyright 2007, The Android Open Source Project**** Licensed under the Apache License, Version 2.0 (the "License");** you

Official Documents original AddressApplication PrinciplesAndroid applications are written in the Java programming language. The Android Software development tool compiles and packages your code and other data and resource files together into an apk file, which uses the. apk suffix to save all the content of an Android app, which the Android device uses to install

Android Application Signature This article mainly introduces the theoretical knowledge of Android Application signatures and how to publish Android applications. 1. Concept of Signature It is a well-known signature in daily life. It represents a special mark of a person and

Overview This guide is used to help developers port existing ARM *-based NDK applications to x86. If you already have a running application, you need to know how to quickly find your application on the x86 device in the Android * Market. This article will provide you with some entry-level information. This Guide also provides some tips and guidelines to help you

Transferred from: http://blog.csdn.net/luoshengyang/article/details/7857163In describing the relationship between Android applications and Surfaceflinger Services, it is mentioned that every android application with a UI needs to The Surfaceflinger service establishes a connection so that the Surfaceflinger service can be requested to Create and render Surfa

Run the QT application on Android The biggest advantage of QT is the cross-platform, one-time development of QT applications, which can run Windows, Linux, Mac ...... Nowadays, the Android operating system on the mobile platform is so popular that QT certainly cannot let go of Android support. By the way, there are als

Android support library for barcode scanning and Recognition Android supports barcode scanning. However, if you do not have a real machine, you cannot understand whether this function is an application or an API call function. However, you can find a free and open-source Android code processing library on the Internet.

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 installed earlier. To avoid this situation,

Android will call android when exiting the application. OS. process. killProcess (android. OS. process. myPid () or System. exit (0), which is only effective for the first Activity (that is, the Activity of the entry. If there are three activities A, B, and C, and you want to exit the Activity in B or C, calling the ab

Data transmission and sharing between Android Application Activities (1) 1. Message-based communication mechanism intent --- boudle, extra Data types are limited, such as non-serializable bitmap, inputstream, or linklist linked lists. 2. Use static data,Public static member variable; 3. Transmission Based on external storage,File/preference/SQLite, if you want to target third-party applications, you need co

Explanation of Android Application Context and source code analysis 1. Background Today, I suddenly remembered that when I was in my previous company (for TV and BOX boxes), several people asked me what the Android Context was, so I am about to give birth to this article. We are always using Context when developing an App (not to mention that you have never used