what is hangouts app on android

What is Android? Android is a software stack for mobile devices. It includes operating systems, middleware, and key applications. Android SDK providesProgramming LanguageDevelop applicationsProgramNecessary tools and APIs. Fea

other applications to Android devices.But now, almost all mobile phone manufacturers are on their own models with a deep customization system, and even the relevant Google services and applications to delete. Now Microsoft's heavy-handed, pre-installed productivity app for Android devices will reduce Google's influence on the mobile side again.For a while, Googl

The previous response briefly describes the principle of inter-process transfer of class objects. before talking about parcel, we should first talk about something: ibinder.What is ibinder? First, you must understand that android remote calls (cross-process calls) are implemented through ibinder. The following is a translation of

Source:/frameworks/base/core/java/android/util/lrucache.javaThe document begins with the following comments: for garbage collection.The meaning is:A cache that maintains a strong reference to only a limited number of value.Each time a value is accessed, it is moved to the team header.When a cache is full, the element a

Look at the source code for these two methodspublic void notifydatasetchanged ()The method internally implements the invocation of the OnChanged event on top of each observer. This method is called whenever a change in the data set is found, or when a new state of the data is read.public void notifydatasetinvalidated ()The method internally implements the invocat

ActivityManager class. This is available from API Level 1. However, starting from Level 8, we were pleasantly surprised to find that there was another method called isUserAMonkey (). After reading this method, what does it mean? "Judge whether a user is a monkey "? It's impossible .. So curious, I started to view the SDK. Only "Returns" true "if the user inte

I. What does wipe mean? The literal meaning of the English word is "yellow", "wipe", "dry", and "clean, from the professional perspective of Flash fans, it can be considered as an operation to erase mobile phone data. What does wipe mean? Professional answers: wipe restores factory settings, including deleting contacts, text messages, installed software, and so o

1.Android WebView some basic conceptsa high-performance WebKit kernel browser is built into the Android phone, encapsulated in the SDK as a component called WebView. What is WebKit WebKit is a software framework included with MAC

(); if (network! = null network.isconnectedorconnecting ()) {returntrue;}} return false;} /** * Infer If there is an Internet connection, if not. The Network Settings dialog box pops up. Returns false */@Overridepublic Boolean validateinternet () {Connectivitymanager manager = (Connectivitymanager) Mcontext.getsystemservice (Context.connectivity_service); if (manager = = null) {Openwirelessset (); return false;} else { Networkinfo[] info = manager.g

The component in Android needs to be represented by an int value, which is the id attribute value in the component tag. The id attribute can only accept the value of the resource type, that is, the value that must begin with @, such as @ id/abc and @ + id/xyz. If "+" is used after @, it indicates that after a layout fi

be installed again and the test can be used properly. 4, of course, cause the cell phone memory card can not read another reason may be the cell phone partition table damage caused, at this time only need to repair the partition table can be. What you do: Install the memory card on the card reader and insert the card reader into the USB interface of your computer. Open the Run dialog box and enter the command "CMD" for the Msdos interface.

program on Android will tell you that sometimes you just need a simple action, and then you implicate a lot of memory. I do not know whether this is an object-oriented organization, or whether Google is not designed. On the other hand, this design is difficult to constrain the developer; take a process monitor to look

From: http://blog.csdn.net/maxleng/article/details/5476544Mobile phone hardware format This section may have nothing to do with Android, but now the Android system is more of a mobile terminal development platform. This section describes the work behind Android-what

Android is an operating system, middleware, and key application.ProgramSoftware set. The android SDK provides necessary tools and APIs for developing applications using Java on the Android platform. Android platform features: Application Framework:Provides reusa

I studied the notepad example provided by the SDK a few days ago. From this example, I can see that intent redirection is used between activities, but I didn't understand what URI is. Today, when I was reading proandroid, I was inspired by the author and finally understood what URI

What is Q:pcmark for Android? A: There is news today Futuremark released PCMark for Android, but such a string of English makes many domestic users puzzled, PCMark for Android is

What is function responsive programming (Java Android) and function responsive programming (java )?What is function responsive programming (Java and Android) -- Welcome to reprint, please indicate the source of http://blog.csdn.n

be delivered to intercept this backward-pressed event. My point here is to ask a question, OnKeyDown event is a layer to achieve the back event. Android is better than. NET! Open source, look at the code. To invoke the onkeydown event in the activity, what

Application Upgrade: If you want users to seamlessly upgrade to a new version, you must sign with the same certificate. This is because only the same certificate is signed and the system is allowed to install the upgraded application. If you have a different certificate, your application will be asked to take a different package name, in which case it

Parcel, which means "packaging. What about packaging? It is for serialization. If you want to pass an integer between processes, it is easy to directly pass the line; if you want to pass a string, it is a little complicated: You need to first allocate a memory that can hold the string, then copy the string to the memo