Programmer Help

1,NSKeyedArchiver,NSKeyedUnArchiver 1) , archiveRootObject:toFile archive object to this path file 2) , unarchiveObjectWithFile: recover objects from this path file For object archiving, we can understand that serialization in Android is to save objects to file persistence. Serializable and Parcelable must be implemented for ...

  1. preparation work: Certified subscription number, opening customer service function, adding a customer service, closing the developer function of public address (or completing business logic on its own). 2. train of thought: click on the menu bar to jump to the public address page, request the ...

1. android Integration 1. Download Alipay sdk, create a new libs folder under android/app, put SDK in this directorysdk download address 2. Import alipaySDK-20180403.aar from the libs directory and add the following code in android/app/build.gradle: dependencies { ...... compile (name: 'alip ...

Today's Learning Content: Watched the Android teaching video on Belly Mile to get a brief understanding of the basic knowledge of Android Specific content: 1. Configure the Android Development Environment (install Android studio, configure JDK) Android studio is an integrated environment that works without having to configure JDK. If you want t ...

I want to round the corner of the button. Is there an easy way to do this in Android? #1 building Create an xml file in the drawable folder as follows <?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" android:padding="10dp"> <!-- you ...

Rendering (left ios right Android): It mainly involves five files, main.dart is the program entry, MainPage.dart is the main interface (equivalent to MainActivity in Android), homepage.dart, FindPage.dart and MinePage.dart are the home page, discovery and mine respectively. First, look at the Main.dart Code: import 'pack ...

On the previous basis, create a new activity to view the answer (cheating), which uses data transfer to the activity to pass the correct answer to the question from QuizeActivity to CheatActivity. We use Intent to pass in values, before startActivity, we store the answers in intent as key-value pairs by intent's putExtra metho ...

Share some common basics of Data Binding in the project, click events and input box operations. DataBinding allows us to fill in DataBinding expressions in some event properties of view (such as onClick, etc.) in xml, and it can also be implemented by binding listener.   First, write a class to represent the click event public class Presen ...

Summary Today, let's talk about how to realize the function of finding house by map in the version of OL3 +. Preparation 1. Functional analysis Look at the map room searching function of chainhouse, which is relatively simple, mainly including: 1) Statistical display based on administrative division; 2) Display by lev ...

Android alphabetical address book Design sketch: Code department: Activity class ContactViewActivity: AppCompatActivity(){ private var mAdater: ContactSortAdapter? = null private var mDataList: MutableList<SortModel>? = null override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(s ...