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In the development of Android UI, we often encounter this requirement:Two components that support sliding, such as the ListView nested multiple Listview,listview item is a Viewpager or gallary? or ScrollView nested ScrollView and so on.In general, you may also need to support several features such as:¤ Two-layer components can slide¤ Do not let two components slide at the same time, or let two components sliding simultaneously and can adjust themselve
As the app realizes more and more functions, watching the novel watching video online and so on, many people now spend more and more time on mobile devices such as mobile phone tablets. But the phone and tablet screen is not as engaging as the Kindle's ink screen, because of the self-illuminated screen features, we stare at the screen for a long time to see easy eyes ache tired, so various protection mode, Night m
**************************************** **************************************** **************************************** ***Author: EasyWave time: 2013.02.16 Category: Android source code analysis statement: reprinted. Please keep the link NOTE: If any error occurs, please correct it. These are my Learning Log articles ...... **************************************** **************************************** **************************************** **
.) The egg hurts, there's Wood!!! (╮(╯▽╰)╭)Another difficulty is that the state of the Viewpager switch is saved. This segment is compared around. I also walked around for a long time to understand.Finally: because it is the test demo code clutter. Don't blame it. These days will be pulled into a library, plus a drop-down refresh and load more features. Hope to help the useful students to put.Demo Monday attached (forgot to upload the network disk.) in the company computer (. _°☆╲ (-)Note: The r
The so-called thread is a sequential sequence of actions to achieve a purpose.Inside the computer, there are a series of continuous movements at the same time. That is, multiple threads are executed in parallel (concurrently).In the computer, if the computer has more than one CPU, each CPU can take care of a thread, so multiple threads can be at the same time. If there is only a single CPU, this CPU can take care of several threads at the same time (concurrently).Whether it is a
URL). OpenStream (), "image.gif"); Mainhandler.post (New Runnable () {@Override public void Run () {//This will run on the main thread//TODO auto-generated method Stub (Imag Eview) MainActivity.this.findViewById (ID)). setimagedrawable (drawable); } }); } catch (Malformedurlexception e) {//TODO auto-generated catch block e.printst Acktrace (); } catch (IOException e) {//TODO auto-generated catch
("Current thread:", "" +thread.currentthread (). GetName ()); try {final drawable drawable = drawable.createfromstream (new URL (URL). OpenStream (), "Image.gif" ); Mainhandler.post (New Runnable () {@Override public void run () {//This will run on the main thread//TOD O auto-generated Method Stub ((ImageView) MainActivity.this.findViewById (ID)). setimagedrawable (drawable); } }); catch (Malformedurlexception e) {//
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than the screen, the control range if (Rect.width () >= width) {if (Rect.left > 0) {deltax =-rect . Left; } if (Rect.right Inside the Onscale remember to call: /** * Set ZOOM ratio * * Mscalematrix.postscale (scalefactor, Scalefactor, detector.getfocusx (), Detector.getfocusy ()); Checkborderandcenterwhenscale (); Setimagematrix (Mscalematrix); This is good, can be free to enlarge any place, and will not appear on the edge
development step is not more than the manual development steps introduced in the previous several blog is more simple AH?! and also omitted the download and installation of Cygwin and use, the last code in the small yellow Line did not, write C code also has code hints, can also be associated with the source, it is simply convenient to the pole! Then we in the development of the JNI program should be taken in such a simple way, this blog introduction to this end, hope to read the blog friends t
Single case mode, which can be said to be the simplest of the 23 design patterns of GOF. This pattern is relatively independent of several other modes, it is only responsible for controlling its own instantiation quantity single (instead of considering what kind of instance produces for the user), it is very interesting, it is a very clean mode, I like this mode
= (ListView) View.findviewbyid (Android. r.id.list); Registerforcontextmenu (ListView); 4, finally in the implementation of the oncontextitemselected (MenuItem Item) method, to handle the Delete menu is clicked on the event. Second, Compatibility context action Bar Menu 1, modify the Oncreateview for the context menu registration. ListView ListView = (ListView) View.findviewbyid (Android
Android.view.view;import Android.widget.button;import Android.widget.EditText; Import Android.widget.progressbar;import android.widget.textview;import android.widget.toast;/** * multi-threaded download under Android, Breakpoint Download * * @author Martindong * */public class Mainactivity extends Activity {//SD card path private static final File SD = Envi Ronment.getexternalstoragedirectory ();p rivate st
after Android 4.4. This shows a simple JS method with return value.function getgreetings () { return 1;}Java code is called with the Evaluatejavascript methodvoid Testevaluatejavascript (WebView WebView) { webview.evaluatejavascript (new valuecallback() { @Override void onreceivevalue (String value) { " Onreceivevalue value= "+ value);}} );Precautions: The result is defined as string, and for a simple type it is attempted to c
Singleton and androidsingleton in Android Design ModeI. Overview The Singleton mode is the simplest one in the design mode, but it does not have the abstract relationship between various objects in the design mode. Therefore, some people do not think it is a mode, it is an i
provides a global access point to access it.Hot words: Singleton unique private structure2. StructureAndroid has a lot of system-level global variables, such as time, input method, account, status bar and so on, which are directly or indirectly used by Android in the single-case mode.Take the input method as an example, change to the actual situation:Very simple, but a little, from the above we also saw the Synchronized keyword, in the
Adapter mode is an important design pattern and has been widely used in Android. Adapters are similar to the plugs in the real world, and through adapters we can combine two different types of data that are classified into different classes without having to add or modify the methods in the class according to a need. The adapter is divided into one-way adapters and two-way adapters, which are used more fre
Eighth chapter, State mode 1. DefinitionThe behavior in state mode is determined by the State, with different behaviors in different states. When an object's internal state changes to allow its behavior to change, the object looks like it has changed its class.2. Usage Scenarios1. The behavior of an object depends on its state, and it must change its behavior at run time based on its state.2. The code conta
stack can come from different apps, so it can be run in a different process, but they all belong to the same task.The Android system is a real-time multi-task system that allows users to switch between multiple tasks at will. When all activity in a task stack pops, the task is destroyed. Sometimes the system destroys the activity in order to reclaim memory, but the task is not destroyed.Activity has the La
. class); return null ;}} Config is the configuration of some common data of the project. Util is a tool class. The above are my personal opinions on the mvc mode in android, mainly because at the beginning, all logic is often written directly in the activity, resulting in the activity being bloated and inconvenient to maintain, as a result, the code in the activity is too concentrated, so the project s
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