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2017-2018-2 20165312 Experiment four "Android programming" experimental report install Android studio and install Android Studio with Hello World test and debug programCan refer to Lou Teacher's blog

action to match the activity to be invoked, To start it. than Intent.action_dial, you can invoke the phone dial panel. If multiple activity filters this ACTION, you are prompted to select one of the activity to display. 2. All existing Activiy are stored in the form of stacks. For example, the newest activity is on the top of the stack, If this activiy is closed, the actvity below it will be displayed. A activity is usually initiated by one activity

Android development: Your SMS Verification Code (2), android Verification Code A gentleman is eager to speak in words.-The Analects of Confucius Recently, when we feel unwell, we have noticed that the body is really the most important thing. No matter how busy we are, we must rest on time, stick to running, exercise, and do some cervical exercises, don't let us g

Path to Android Development 7-UI component 2 Today, we continue to learn about the UI components, mainly including TextView and EditText. TextView component introduction: Subclass: Button, CheckdTextView, Cheronometer, DigitalClock, EditText Indirect subclass: AutoCompleteTextView, CheckBox, CommpoundButton, MultiAutoCompleteTextView In its xml file, there are many attributes mentioned today, for example:

How to obtain android mobile phone contacts and display them in letters (2): android contacts The following describes how to categorize and display contacts with the same initials: In the adapter implement SectionIndexer In this way, the adapter must implement the following three interfaces: @ Overridepublic Object [] getSections () {// collection of sections} @

Build an android universal pull-down refresh framework-XRefreshView (2), android pull-down refresh I. Preface Since the last release of the XRefreshView (1) framework for building an android universal pull-down and refresh framework, it has been very busy for more than half a month, however, I update and maintain XRefr

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Android Network Programming (2) HttpClient and HttpURLConnectionPreface In the previous article, we learned about the principles of the HTTP protocol. In this article, we will talk about HttpClient of Apache and HttpURLConnection of Java. These two types are commonly used in the request network. Both our encapsulated network request classes and third-party network request frameworks cannot be separated from

Use of Menu level 1 Menu and level 2 Menu of Android learning notes, and android learning notes (1) No changes have been made to the layout file. (2) the code in the main. xml file under the res -- menu directory is as follows: (3) In the string. xml file under the values directory: (3) The MainActivity. java code

[Development Diary of Android in a row from scratch] (2) -- debugging and android beginnersProgrammers spend half of their time testing bugs, and being a programmer encountering bugs is inevitable. Therefore, mastering the BUG debugging technology is crucial. Next, let's talk about several key points of debugging. 1. Select a debugging machine (simulator) Ii. Aux

Chapter 2 attracting your attention-UI programming (2), chapter 2 ui2.1.3 text edit-edit box (EditText) EditText is also a frequently used component in our development. For example, to implement a logon interface, you need to enter the account, password, email, and other information. Here, you need to use the EditText component to obtain the content entered by th

It is concluded that dialog and alertdialog do not affect the life cycle of the activity, but affect the priority of the activity.Core code:in oncreated:Resources Resources= This. Getresources (); Displaymetrics Displaymetrics=Resources.getdisplaymetrics (); Final intWidthpixels = DISPLAYMETRICS.WIDTHPIXELS/2; Final intHeightpixels = DISPLAYMETRICS.HEIGHTPIXELS/2; //1//