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In Android, sometimes we don't need to use the local SQLite database to provide data, more often from the network to get data, then how does Android get data from the server? There are many kinds of
One: Obtain data method based on HTTP protocol. Two: Data acquisition method based on SAOP protocol, three: forget------
physical screen relative to the ground-ui the angle of rotation relative to the physical screen
The way Android apps get the screen rotation angle is: int rotation = Activity.getwindowmanager (). Getdefaultdisplay (). Getrotation (); int degree= * rotation; Float rad = (float) math.pi/2 * rotation;DemoAccording to the above algorithm, I wrote a "Tumbler" of the demo, when the devi
1. Open Android Studio at the bottom to find terminal such as2. Input command c: enter C drive3. Enter the command CD Users\administrator where Administrator is its own user name Administrator file has a. adnroid file4. Enter the command CD. Android as5. Enter command keytool-list-v-keystore debug.keystore where debug.keystore is studio default KeyStore Can be replaced by their own generated keystore su
There are several ways that Android can submit data to the server, how they use it, here we explore.The example here is to submit the client's username and password, and the Streamtools.readinputstream (is); The function is to transfer the input into a string, which is a public class. I've introduced it earlier. Http://www.cnblogs.com/fengtengfei/p/3969520.html, this is not a duplicate explanation. First type: GETThe key parts are:First we use URL wra
method is almost the same as the second one, just to change the method to filed and then output the field name.GetFields (): Gets the full permission modifier decorated fieldField Name = AgeField name = NameField Name = heightField Name = SchoolIn the fourth method, we obtain a detailed method based on the method name, and then pass in the argument. Invokes the method with Invoke.You must set Method.setaccessible (true) before calling again, and you can call methods that use the private adornme
In Android development, we often use the network connection function to interact with the server. Therefore, the Android SDK provides Apache HttpClient to facilitate the use of various Http Services. You can think of HttpClient as a browser. Through its API, we can easily send GET and POST requests (of course, its functions are far more than that)
This document
"android:layout_height="Match_parent"android:layout_weight=" 3.0 " /> linearlayout>linearlayout>Because, belongs to the novice to understand the first 2 things. So there is not too much explanation, the comments are very thin (self-think), also suitable for lazy ghosts to use.Source Address: Http://yunpan.cn/cdkX7pQSCamJM access password 82C9 Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduc
On Android, we can use Qpython to write and execute Python scripts. It on many AndroidThe system functions are conveniently encapsulated, and it is easy to use Qpython to write small programs with simple functions.This example is the underlying script that I used to read the phone's location information and serve as a further process for processing the data.#-*-coding:utf-8-*-ImportAndroidhelperImport Time fromMathImportradiansdroid=Androidhelper.
, the latter have time to focus on a mention. Of course, I seem to stand in the commanding heights of morality, follow a programmer should be good quality, but the face of all kinds of strange bosses, this kind of thing should be careful to do, after all, in order to live, not survival.It is decided that the development of Android will begin, where to use what knowledge to explore.While writing a blog, do it by yourself:Dialer, give me the idea is sho
This afternoon encountered a very common feeling, but the degree of Niang n times, but always found no effective solution, so, in the case of the suffering of others without fruit, the study of a simple and effective method, the concrete realization of the following ideas :(1). Let the Android client pass String str = urlencode.encode (str, "Utf-8") before sending a GET request; Specifies that the encoding
Using Android's intent to invoke another activity, the use of a multithreaded mechanism, asynchronous way. Startactivityforresult is called after the activity does not return the result immediately to the Acitivity object that called Activity,android The Startactivityforresult source code has the relevant explanation. /*** Launch an activity for which you would like a result? ? ? ? ? ? When it finished. ? ? ? ? ? ?* When this activity exits, your* Ona
/* ************************************************************************* * get android APK JNI Library * Description: * With Android APK as the built-in apk, you will often encounter problems finding the JNI library, this article records how to solve this problem. * 2016-7-13 shenzhen Nanshan P
Android Development: Sharedpreferences store data, get dataEmail:[email protected] Development Environment : Win7 64-bit,Android Studio.About Sharedpreferences. Personal understanding of it is understood as a lightweight database. The Access form is the same as map: I just use it to store the login information and login status so that I can read the information l
=Pm.getapplicationlabel ( - Pm.getapplicationinfo (PackageName, the packagemanager.get_meta_data)). ToString (); theMfloatview =(Button) mfloatlayout the . Findviewbyid (r.id.float_id); the Mfloatview.settext (progressname); -Toast.maketext (Fxservice. This, Progressname, the toast.length_short). Show (); the}Catch(namenotfoundexception e) { the //TODO auto-generated Catch block94 e.printstacktrace (); the } the } the });98}Note: If you want to
Android get folder, file size in B, KB, MB, GBpublic class Filesizeutil {public static final int sizetype_b = 1;//Gets the double value of file size unit B public static final int sizety pe_kb = 2;//Gets the file size in kilobytes of double value public static final int sizetype_mb = 3;//Gets the file size unit to MB Double value public static final int sizety PE_GB = 4;//Gets the file size unit is a double
Application Scenarios :1. Display the version number of the application in the interface;2, the user launches the application, the background to determine whether the application is the latest version.Each of these scenarios requires that the app's version number be automatically obtained in the program.Idea Introduction :In Android, The version number of the application is configured in the Androidmanifest.xml file, and the PackageInfo class encapsul
This article describes the Android programming implementation to get the title bar, status bar height, screen size, and simulate the home key method. Share to everyone for your reference, specific as follows:
1. Get the title bar height:
/**
* Get the height of the title bar *
* @param activity
* @return
/
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