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Android mobile guard-navigation interface 3, 4 and function list interface jump logic processing, android4 and It took just a moment to write the layout of the navigation interface 3 and 4 and the corresponding jump logic: The Setup3Activity code is as follows: /** * Created by wuyudong on 2016/10/10. */public class Setup3Activity extends Activity{ @Override

In the QQ project, we have implemented the background operation of the notification bar and sent new message prompts. Generally, we often use two components toast and notification during Message notification. In particular, it is most appropriate to use notification to display important and long-time information. When there is a message notification, the status bar displays the notification icon and text. You can see the notification information through the drop-down status bar.

In development, you often encounter the need to get control size after activity initialization is complete.However, this operation cannot be called in the OnCreate, Onresume, and other life cycle methods because we do not know when the view will be initialized to completeTo this end, a summary of the four implementation methods1, activity/view#onwindowfocuschanged This method is the listener focus pity Dorado, but in many cases it may be called multiple times and needs to be handled appropriate

First, the three elements of the event:Event Source: Source of event occurrenceEvent: Behavior (click, touch ...)Event listener: What to do when an event occursSecond,Onclicklistener (Click event)Interface definition: public static interface View. Onclicklistener {public void OnClick (view view);}1 protected voidonCreate (Bundle savedinstancestate) {2 Super. OnCreate (savedinstancestate);3 Setcontentview (r.layout.focus);4Button bt= (button)Super. Findviewbyid (R.ID.FOCUSBT1);5 //Set lis

There are a number of ways to implement TextView text links in Android. In summary, there are about 4 kinds.： 1. When the text appears in the URL, E-mail, telephone number, etc., you can set the TextView Android:autolink property to the corresponding value, if all types come out is android:autolink= "all". Of course, can also be done in Java code, textview01.setautolinkmask (Linkify.all); 2. The text to b

the whole application talk about already almost, after this article, I will upload source to resources, like can download and learn, today, the alarm clock start setting, set page loadingIn Android, the alarm and wake functions are controlled and managed by the Alarm Manager service. We are familiar with the RTC alarm clock and timer have a great relationship with it. For your convenience, I often call this service a alms.In addition, ALMS provides a

This article is mainly for you to talk about adapter ListView optimization and send Weibo, we all know that Android in some of the more memory-intensive classes, in order to avoid wasting insideWe need to optimize our components and so on, so that they save unnecessary waste of resourcesCustom adapters:Package com.neweriweibo.adapter;/** * Adapter * @author engineer-jsp * @date 2014.10.28 * */import java.util.arraylist;import Com.neweriweibo.r;import

code.3 The code defines an interface, but the method of setting the listener is commented out, you will find no error, indicating that it does not really use the setup listener.Public interface Onquickoptionformclick {void Onquickoptionclick (int id);}So, the question is, when can we deal with it like this? According to the interface named "Who clicked"? So after we instantiate the dialog box in the main interface, Quickoptiondialog dialog = new Quickoptiondialog (mainactivity.this); With dialo

total number of bytes downloaded as progress, the total size of the target file as MAXPB = (ProgressBar) Findviewbyid (R.ID.PB); TV = (TextView) Findviewbyid (r.id.tv);} public void Click (View v) {Thread t = new Thread () {@Overridepublic void run () {try {URL url = new URL (path); HttpURLConnection conn = (httpurlconnection) url.openconnection (); Conn.setrequestmethod ("GET"); Conn.setconnecttimeout (8000); Conn.setreadtimeout (8000); if (conn.getresponsecode () = = 200) {//Get the total len

60 years old, then the "middle age", if the ages between 18 to 40 years old, then the "juvenile", 18 years of age, the reminder "childhood"Operation Result:1 Public classHelloWorld {2 Public Static voidMain (string[] args) {3 intAge=25;4 5 if(Age >= 60) {6System.out.println ("Old age");7}Else if(Age >= Age ) { 8System.out.println ("Middle-aged");9}Else if(Age >= Age ) {TenSystem.out.println ("juvenile"); One}Else { ASystem.out.println ("Childhood"); - } -

simple demo adds the company attribute to the contact person to save the JS code:[JavaScript]View Plaincopy Save data function Save () { var contact = new Object; Contact.user_name = document.getElementById ("user_name"). Value; Contact.mobilephone = document.getElementById ("Mobilephone"). Value; Contact.company = document.getElementById ("Company"). Value; var str = json.stringify (contact); Localstorage.setitem (CONTACT.MOBILEPHONE,STR); Loadall (); } Extracts al

Notation 1: Inner classDefine an inner class to implement the Onclicklistener interface, and then register an instance of the inner class with the button.Notation 2: Anonymous inner classnotation 3: Let the activity implement Onclicklistener interface, through this to register button click event, the replication OnClick method, by judging the view, centralized processing each button click event. This method is the most commonly used method for having multiple click events.notation

="The index column that shrinks the two or three column. Because the subscript starts at column No. 0. When a Lietaikuan (too much content) is not extruded, the columns must be separated by commas, and all columns can be shrunk by means of *.A column can represent both contraction and stretching."Android:stretchcolumns="Stretches the index column of the two or three column. Because the subscript starts at column No. 0. The index column starting at 0. To fill the rest of the extra empty space, th

In this example, we will focus on using the SQLite database access method provided by the Android platform, including read/write access.1. Follow the following configuration and the method described in step-by-step instance 1 to create the base of the entire project:Project name: examplefourPlatform: android2.0;Application name: examplefourPackage name: COM. ExampleActivity: mainactivityResource file: Main. xmlThe attributes of a textview are as follo

Android image download framework UniversialImageLoader memory cache extension (4) The expansion of the memory cache is very important. Whether it is the data structure or the specific implementation, it is worth our taste. Let's taste the taste here. The memory cache extension mainly involves the following types: FIFOLimitedMemoryCache, FuzzyKeyMemoryCache, LargestLimitedMemoryCache, LimitedAgeMemoryCache,

Switching animation of shared view elements during Activity switching in Android (4.x compatibility solution)Solution 1: PreLollipopTransition First, add the library dependency in the build. gradle configuration file. dependencies { compile 'com.kogitune:pre-lollipop-activity-transition:1.0.0'} The first is to start the Activity findViewById(R.id.imageView).setOnClickListener(new View.OnClickListener()

Android image download framework UniversialImageLoader memory cache extension (4 ), The expansion of the memory cache is very important. Whether it is the data structure or the specific implementation, it is worth our taste. Let's taste the taste here. The memory cache extension mainly involves the following types: FIFOLimitedMemoryCache, FuzzyKeyMemoryCache, LargestLimitedMemoryCache, LimitedAgeMemoryCache

Android custom View (4) ------ one-click animation cleanup1. Preface: I also learned some basic custom view methods by referring to some custom view examples of others. Today, I have made a one-click animation based on some of my own understandings. In those years, I used several images and implemented them using Frame anination. However, this method is not flexible and occupies resources. below, I will use

Android (Lollipop/5.0) Material Design (4) create a list and a card In your application, create complex lists and card and material design styles, and you can use RecyclerView and CardView parts. The create list RecyclerView component is a more advanced and flexible version list view. This widget is a very efficient container. With Limited views, you can scroll to display large datasets. Elements of the Re

Android source code parsing (4) --) IntentService What is IntentService? In short, IntentService is a Service that contains its own message loops. First, it is a service. Therefore, services have its own characteristics and some of its own attributes, it encapsulates a message queue and a HandlerThread. In its specific abstract method, the onHandleIntent method runs in its message queue thread, let's take a