messaging apps for android

() runs in a new threadHttpClient HC = new Defaulthttpclient ();HttpGet hg = new HttpGet ("Http://csdnimg.cn/www/images/csdnindex_logo.gif");//Get CSDN logoFinal Bitmap BM;try {HttpResponse hr = Hc.execute (Hg);BM = Bitmapfactory.decodestream (Hr.getentity (). getcontent ());} catch (Exception e) {Mhandler.obtainmessage (msg_failure). Sendtotarget ();//failed to get pictureReturn}Mhandler.obtainmessage (MSG_SUCCESS,BM). Sendtotarget ();//Get picture successful, send msg_success identity and bit

Why should I refer to the message mechanism?1:ANR (Application not response) application unresponsive main thread (UI thread)2: If a time-consuming operation occurs in the main thread, it causes the ANR (such as linking the network, copying large data) Thread.Sleep ()3: Avoid the ANR you can take the time-consuming operation into a child thread and it's your new thread.4:android4.0 after Google forced to require the link network can not be accessed in the main thread5: Only the main thread (UI t

);//deliver content for each update Try{thread.sleep (arg0[0]);//deferred execution}Catch(interruptedexception e) {//TODO auto-generated Catch blockE.printstacktrace (); } } return"Execution is complete!" "; }} @Override Public BooleanOncreateoptionsmenu (Menu menu) {//inflate the menu; This adds items to the action bar if it is present.getmenuinflater (). Inflate (R.menu.my_async_task_demo, menu); return true; } @Override Public Booleanonoptionsitemselected

is not looper by default and requires handler to be created for the thread first handler class looperthread extends thread{ public Handler Mhandler; public void run () {looper.prepare (); Mhandler = new Handler () { public void Handlemessage (Message msg) { // process incoming messages here create Looper in threadWhy is the main thread not needed?Since the activitythread was created, it has been initialized LooperIi. Overview of the message mechanismAndroid

Msg.target.dispatchMessage (msg); Here we call DispatchMessage (msg), here we see what Target is, Serious classmates will find above the Enqueuemessage method to assign value to target, msg.target = this; This line of code shows that the target is the handler object that sends the message, and looks at how the DispatchMessage (msg) method in handler is specifically implemented:/** * Handle system messages here. */Public void DispatchMessage (Message msg) { if (msg.callback! =

due to performance requirements, Android requirements can only be UI Update in Thread UI that you want to update in other threads UI , let us introduce one way: using Handler message passing mechanism . below updates a textview : packagecom.example.runonuithreadtest;importandroid.app.activity;import Android.os.bundle;importandroid.os.handler;importandroid.widget.textview;public classMainActivityextendsActivity{privateTextViewtv; Handlerhandler=n

QR code synthesis, Apple and android (ios and android) are combined into a QR code, allowing users to scan a QR code to download apple and android apps separately. android QR code scanning Because of the company's promotion, there is no suitable tool to synthesize a QR code

When the worker thread sends a message to the main thread, because the main thread is looper, there is no need to initialize the Looper, pay attention to who sends the message to associate whose handler, this time uses is the main thread handlerHandler will send the message to the MessageQueue queue, Looper will continue to traverse the MessageQueue queue, when there is a message will be callback handler method Handlemessage!When the main thread sends a message to a worker, the handler of the ch

Prepared by: Xu jianxiang (netpirate@gmail.com) Date: 2010/10/12 Web: http://www.anymobile.org I have been responsible for the development of a smart phone platform for an instant messaging software in recent months (I already have a fixed version for mobile phone manufacturers and carriers, and will release the public version recently). I have referred to the design style of the iphone, and the functional design and code of QQ for

);}Currentfragmenttype = Call_fragment_type;}Transaction.commitallowingstateloss ();} Private Onclicklistener Onclicker = new Onclicklistener () {@Overridepublic void OnClick (View v) {Switch (V.getid ()) {Case R.id.btn_message:Btn_message.settextcolor (Color.parsecolor ("#df3031"));Btn_call.settextcolor (Color.White);Btn_message. Setbackgroundresource (r.drawable.baike_btn_pink_left_f_96);Btn_call. Setbackgroundresource (r.drawable.baike_btn_trans_right_f_96);Switchfragment (Message_fragment_ty

The message mechanism of Android is mainly refers to the operation mechanism of handler, handler operation needs the bottom MessageQueue and looper support;MessageQueue: Message Queuing, whose memory stores a set of messages that provide insertions and deletions in the form of a queue, internal structure: usingA single-linked list of data structures to store message queues;Looper: Processing MessageQueue message, will be in an infinite loop to find ou

One, the supported features have text information interaction, voice chat, send files and recordingThe source code will be attached later.Second, the UI display diagramThree, after my test, is very successful. Just a little bit is the voice of real-time calls when the voice will echo or even panic. File transfer and text, recording are more successful.The software is the application of Java code, on the Android platform. UDP protocol and TCP protocol

Although you could have used a Web page to start directly on the Android main screen, the Chrome V31 Beta for Android added to the main screen is a little bit improved, with a shortcut to the Web page that is in Full-screen mode without a variety of buttons. It makes you feel like you're using native apps (it's really hard to distinguish between native

notification view message; The notification message should be exactly what you entered in the Firebase console:650) this.width=650; "Src=" https://s3.amazonaws.com/blog.xamarin.com/wp-content/uploads/2017/04/18134903/11- Notification-text.png "class=" AlignCenter size-full wp-image-31081 "width="-/>Congratulations, you just sent and received the first FCM push notification!Learn MoreThis simple example involves only the work that you can do with FCM and push notifications in Visual Studio. To l

Basic tutorial for Android-1.2.1 use Eclipse + ADT + SDK to develop Android apps and androidadtAndroid basics tutorial -- 1.2.1 use Eclipse + ADT + SDK to develop Android apps Tags (separated by spaces): basic Android tutorial1. P

Today we have compiled 16 of the most popular Android Apps, mainly based on the download volume of 2013 of users, which is sufficient to prove their popularity. If you haven't installed them yet, try it now! Address: http://thetop16.com/top-android-apps-169.html 1. Facebook (Social) Keeping up with friends is faster t

Presumably everyone knows that domestic Android apps are basically free, so how do developers get paid? The application of the insertion of advertising is a relatively common means of profit. This article explains how to insert ads in Android apps. The domestic advertising platform has many, the user quantity is more

configure our Python on the Android operating environment, the application is sl4a. Enter https://code.google.com/p/android-scripting/Click QR Code to download, my is sl4a_r6.apk, then go to Downloads page:Apply the ADB tool to install the downloaded two files into your Android virtual appliance:Install those two apk files$ADB Install sl4a_r6.apk$ADB Install pyt

--> Developing Android apps in the browser There is a need to use the knowledge of Docker, Che released after the Android application development of a tool, here on how to implement this feature on the line detailed: Eclipse Che Che recently released the official version, so I'd like to introduce Android

This article describes 10 recommendations for the efficient development of apps in Android programming. Share to everyone for your reference, specific as follows: If you want Google Play to do a most failed case, the best secret is that the interface is incredibly slow, power consumption, memory consumption. Then you get negative comments from the user, and then your reputation stinks. Even if your applica