Android determines whether the current android device is online.
First, to determine whether the current android device is online, android itself provides us with a service
Private ConnectivityManager connectivityManager; // used
Prompt Connection failed when upgrading. Please check your network connection and try againModify the Bin\studio.exe.vmoptions file in the installation directory, such as E:\Android\android-studio\bin\studio.exe.vmoptionsAdd Content:-djava.net.preferipv4stack=true-didea.updates.url=http://dl.google.com/android/studio/patches/updates.xml-didea.patches.url=http://d
Prompt Connection failed when upgrading. Please check your network connection and try againModify the Bin\studio.exe.vmoptions file in the installation directory, such as E:\Android\android-studio\bin\studio.exe.vmoptionsAdd Content:-djava.net.preferipv4stack=true-didea.updates.url=http://dl.google.com/android/studio/patches/updates.xml-didea.patches.url=http://d
Android determines whether the current android device is onlineFirst, to determine whether the current android device is online, android itself provides us with a service
PrivateConnectivityManager connectivityManager; // used to determine whether there is a network connecti
Android push implementation: Architecture Analysis of tens of millions of concurrent online push systems | Yixin interactive ye Xinjiang | Android devcamp
Topic Introduction: Mobile Short Messages are a well-known information push method. Push Based on signaling channels has been accepted by everyone in terms of simple information experience. In terms of mobile
Objective
In order to ensure a weekly progress, and because the new version of Vitamio has not been released, decided to postpone the local playback of some features (screenshots, video time, size, etc.), skip directly write the section of the online play part. As you can see from Vitamio's introduction, it supports a variety of network protocols such as HTTP, m3u8, and this chapter will write examples of playing Youku videos.
Series
1.
In the development of Android project, we can see many project source code on the net, most of them are not very exquisite,such as 06.Android Ford Multimedia Player Development Tutorial + sourceWhat else is the browser source code.So is this useful? Where is the value?Fine source code also has, for example, from working there to commercial source code.Are these sources useful? Where is the use?It is useless
During this time, I always saw online video playback materials and summarized them as follows:
1. You don't have to say anything about playing a local video, whether it's videoview, surfaceview, or mediaplayer.
2. Online playback server video:
A. You can use videoview or surfaceview to play a video in progressive download format.
B. Streaming Media videos can also be used (this is the best and most popular.
In the example Android Concise development Tutorial 17: Dialog Display Image We left an example drawmap () is not implemented, this example shows the online map, most of the current map server is the map to the image storage to improve response speed. The general size is 256x256 pixels. You can see the offline map download method analysis.
For example: URL http://www.mapdigit.com/guidebeemap/maptile.php?ty
on if continue to enlarge even if multiplied by 1.0001 will be larger than 2 thereby
//avoid the above problem.
if (Getmatrixscaley () * scalefactor > 2) {
scalefactor = 2/getmatrixscaley ();
}
if (Getmatrixscaley () * Scalefactor
So far this relatively rough selection function is achieved, there will be time to continue to optimize the details of the problem.
The following two demo are compared to the force I will not upload demo.
Resources:
Winsock's select mode and is event-driven. The entire processing method uses the rotation state machine, if you have developed a Symbian application in the past, this method is a bit like an active object. The advantage is that a single thread saves system overhead and NiO can handle concurrency well, it is critical for Android online game development. using NiO for Multi-Point socket connections can great
Case study of online update for Android
I. Preparation for updating softwareTo update software online, we need a signed application. We need to put the software that has been signed into the server. My example is as follows:Apk is an updated version with a signature!The updateinfo.html code is as follows:
{Version: 2.0, description: all new versions are available
Android enables online music playingHello, friends, the first blog published by Shanshan in August. Recently, Wu was looking for a job, and when she got sick, she didn't have much energy to write a blog. Today, I am dragging my head to publish an article about the online music effect that has been achieved previously. It is not difficult to play music
For online installation of android_apk, in addition to designing the Android client code, we also need to build the server code and simulate the online upgrade of Android software.
The Android client code is as follows.
MainActivity
Package com. example. f03_packmanager; i
Download the latest version of Android website ndk and adt Based on Baidu online storage !,
To download the latest NDK version, you can download the latest content from Baidu online storage without turning over the wall!
Windows 32-bit android-ndk-r10e-windows-x86.exe http://dl.google.com/
Please respect the results of sharing, reproduced please indicate the source, this article from the countercurrent fish yuiop, the original link: http://blog.csdn.net/hejjunlin/article/details/53454514Foreword: Recently in the study Mediacodec,u disk bad, before the source of the download is naturally no, really a sad thing, not because there is no source, will block my plan ah, so is today a article, online to see the
Solve the problem that the official version of Android Studio cannot be updated online.
Android Studio supports Online Incremental updates, but may not be able to connect to server updates. The solution is as follows:
1. modify the system hosts file and add the following two lines:
203.208.46.146 dl-ssl.google.com203.2
Google opens the android source code. We can download it from the following website:
Http://source.android.com/source/downloading.html
However, sometimes we just want to see how a part is implemented and do not want to download the entire repo or even the entire workspace. Android online source code provides us with a good choice.
Search for "
Android Studio 1.0 official version download (link to Baidu online storage), androidstudioAs we all know, it is still not easy to visit the Android official website. Here I copied the page with the required link. In fact, you only need to take the link offline to the Baidu Network Disk (or use my Baidu Network Disk link), or use thunder to download it. The speed
-sourceCompatibility-1.7Translation: Android Studio Chinese Group (sledgehammer translation)Continuation: Gradle (i) | Gradle (b)Common TasksWhen a plugin is applied to the build file, a series of build tasks are automatically created to run. Both Java plugin and Android plugin will do the same.We have the following four contracts for tasks:
Assemble task, assemble all project outputs
Check ta
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