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This article illustrates the method of data transfer between Android implementation activities. Share to everyone for your reference. The specific analysis is as follows:
First, explain the start and shutdown of activity:
1. StartActivity (Intent Intent); Start activityFinish (); End Current Activity2. Startactivityforresult (Intent Intent, int requestcode); Starts an activity with the specified request c
, rectangles, can draw them directly onto the screen. Android.location: Classes for targeting and related services Android.media : Provides some classes to manage a variety of audio and video media interfaces Android.net: Provides a class to help network access, exceeding the usual java.net.* interface Android.os: Provides system services, message transmission, IPC mechanisms Android.opengl : Provides OpenGL tools Android.provider: Provides class access to A
Event transfer between android controls
Public boolean dispatchTouchEvent (MotionEvent ev ){}
For event distribution, all events in Android must be distributed through this method, and then decide whether to consume the current event or continue distributing it to the child Control for processing. If the return value is true, the distribution is not resumed and
(HttpPost);
if (Response.getstatusline (). Getstatuscode ()! = 404) {
result = Entityutils.tobytearray (response.getentity ());
}
} catch (Exception e) {
LOG.E ("Httputils", "Connection server error");
E.printstacktrace ();
}
At this point, the binary data is requested to the network and responds to the binary data stream(5) The remaining steps will be obtained by using the Msgpack-unpack method to obtain the binary data you want to obtain the corresponding data:[Java]View P
Passing data between ActivtyPrior to learning how to start an activity, in some cases not only need to start another activity, but also to get the results returned. And sometimes more often when you start another activity with some values.1. Define a intent and specify the activity that will be started for the intent2. Call Startactivityforresult (Intent intent,int Requestcode) to jump and Mark Requestcode3. Rewrite onactivityresult (int requestcode,int resultcode,intent data) to parse the retur
This article is on the basis of the previous blog post on the Android XMPP-based Instant Messaging 1-basic conversation, adding new features to File transfer1. Initialization of file Transfer management class Public StaticFiletransfermanager Getfiletransfermanager () {if(FileManager = =NULL) {Servicediscoverymanager Sdmanager=Servicediscoverymanager. Getinstancefor (connection); if(Sdmanager = =NULL) {Sdman
create a message Queue for the main thread. In this strand thread does not establish a message Queue. Therefore, the Mylooper value is null, and mainlooper points to the looper of the mainline thread. Then, execute to:Mhandler = new MyHandler (mainlooper);This mhandler belongs to the main thread.Mhandler.sendmessage (m);The M message is deposited into the message queue of the main thread. Mainlooper sees a message in the message queue and processes it, and the main thread executes to Mhandler's
Transfer the Android Market cache to the SD card sizeProgram!
A previous tutorialHow to clear System junk in Android G1
Now I have a better way to save memory, that is, to transfer the cache in the market to the SD card, so that you can "have no scrubs" on the market.Because the cache is not loaded into the cell phon
Years ago, I studied how Android can implement the Wireless Data Transfer Function and wrote a demo. I have nothing to do with it recently. I want to sort it out and share it with you. Early research found that Android has the following technologies to achieve wireless data transfer: 1. Bluetooth has been used for a lo
Android development, in different modules (such as activity) will often have a variety of data need to communicate with each other, commonly used in five ways of delivery. They have their own pros and cons and have their own application scenarios. Here are a few separate sections:1. Intent object passing simple dataThe extra portion of the intent can store the data that is passed, and can transfer some unde
In Android, data transmission between images is mainly implemented through the putextra method of intent. The transmitted data structure is a map data (name/value pair, note that the difference is that the basic data type must be used. The following describes the implementation methods through instances.
This example describes how to transfer the data of image 1 to Image 2, after Image 2 calculates and proc
In development, we often use the activity, then since the use of activity, it is inevitable to pass data between the two activity. Here we first talk about the principle, look at the code and examples.Situation A: We need to start and pass data from Activity_1 to activity_2,activity_2 only to receive data from Activity_1, but not for other operations.Case B: We need to start activity_2 from Activity_1, and want Activity_2 to pass the data to Activity_1 when it is destroyed.First of all, let's sa
wasThis is the main code in the first activityThe code for the second activity isEdit without any errors, but run the program, the following interface appearsWhen you click the Calculate button, the following conditions occur:Check for Logcat hints in eclipseThe reason for the error is probably that an activity parameter is not passed to the second activity, causing the second activity to receive a null parameter, and then cause the program to run an error, after its own careful check out, the
---restore content starts---First of all, to install the software, feel I have found some of the textbooks are relatively simple, after some detours, decided to follow this Baidu experience toA detailed tutorial on Android development environmentHttp://jingyan.baidu.com/article/948f592448183bd80ff5f9d1.htmlThe place to compare pits is that the Android SDK is downloaded, and after clicking on "SDK Manager.ex
Serviceconnection Mserviceconn = new Serviceconnection (){public void onserviceconnected (componentname name, IBinder service) {Mdatetimeservice = IDateTimeService.Stub.asInterface (service);}public void onservicedisconnected (componentname name) {Mdatetimeservice = null;}} ;DescriptionA lot of information on the Internet does not involve the aidl of the IPC call specific instructions!It is essentially the server side and client side both have the same Aidl file, to be located under the same pa
=NewBigInteger (1/*Positive*/, pubkey.getencoded ()). ToString (16);55 56//Pin It!57 58Final Booleanexpected =pub_key.equalsignorecase (encoded);59 60if(!expected) {61 62Throw NewCertificateexception ("checkservertrusted:expected public key:" + Pub_key + ", got public key:" +encoded);63 64 }65 66 }67 68}2 Certificate Locking: The issuing of public key certificates for the client is stored in the mobile client (using KeyStore), when HTTPS communication, in the client code to secure t
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