An introduction to the application and advantages of the observer model for Android source learning _android

Observer Pattern Definition: Define a one-to-many dependency between objects so then one object changes state, all its dependents AER notified and Updated automatically. Defines a one-to-many dependency between objects so that when an object changes

Fragments_android in the Android management activity

Fragmentmanager In order to manage fragments in activity, you need to use Fragmentmanager. To get it, you need to invoke the Getfragmentmanager () method in the activity. Because the API for Fragmentmanager is introduced in Android 3.0, API level 11

Android Development Basics Tutorial-file storage function Implementation _android

File storage: Copy Code code as follows: public class Mainactivity extends activity { EditText Mname, Mage; TextView MTV; @Override protected void OnCreate (Bundle savedinstancestate) { Super.oncreate (savedinstancestate);

Android Development Basics Tutorial-Call Texting _android

Call to send a text demo Copy Code code as follows: public class Mainactivity extends activity { EditText Mphonenum,mmessage; @Override protected void OnCreate (Bundle savedinstancestate) { Super.oncreate (savedinstancestate);

The operating principle and interactive implementation of Android keyboard events and screen events _android

When customizing view or playing games, we often use the keyboard to trigger events and screen triggers! Keyboard triggers events in a custom view (e.g. OnKeyDown (int keycode, keyevent event)) and screen triggering events (Ontouchevent (Motionevent

Android implementation gets the running application _android

Because you want to add this functionality in the framework, you write a appliction to get the running application: Let's look at the picture first: This app is simply implemented to get a system-less application and some common system

Android clipping picture for circular picture realization principle and code _android

Previously found in the EoE forum to crop the picture as a circular picture method, but the effect is not very ideal, these days because of the company's business requirements, the need to cut the head to a round way to display, this method is based

Docker implements Android apps in the browser _docker

--> Developing Android apps in the browser There is a need to use the knowledge of Docker, Che released after the Android application development of a tool, here on how to implement this feature on the line detailed: Eclipse Che Che

The Android custom view control implements the refresh effect _android

Three ways to get Linearinflater A. Layoutinflater Inflater = Getlayoutinflater (); B. layoutinflater Localinflater = (Layoutinflater) Context.getsystemservice(Context.layout_inflater_service); C. layoutinflater Inflater = layoutinflater.from

Android solves the Back event problem when dialog cannot capture activity when it pops up _android

How Android solves the back event that dialog cannot capture activity when it pops up In some cases, we need to capture the back key event, and then write to what we need to do in the event we capture, usually with the following three ways to catch

Android App Payment Series (ii): Alipay SDK Access detailed guide (with official payment demo) _android

A mobile internet company, in the final analysis, to make a profit always need to pay users, the development of their own payment system for the limited resources of the company is clearly unwise, there are many mature mobile payment providers, Ali

Android Custom Popupwindow Instance code _android

Let's take a look at the effect chart: First, the layout 2, custom Mypopupwindow inheritance Popupwindow public class Mypopupwindow extends Popupwindow { 3, rewrite the construction method and animation stylein Styles.

Android Custom Popupwindow Small Case _android

The  popupwindow is one of our frequent customers, and it is easy to use.   wrote the simplest custom Popupwindow, recorded, easy to use later on the above changes can be. /** * @param * @author LDM * @description Custom Popupwindow * @time

Design _android of Android imitation micro-letter voice Chat interface

A period of time did not watch the video, last night smoked a little time, and saw the next big God video tutorial, and took time to write a study record. The code is basically the same as the teacher said, and there are many similar blogs on the

Android ListView Add header layout and foot layout examples detailed _android

Android ListView Add header layout and foot layout Before learning Himalaya A small demo, posted out for everyone to learn the reference; If our current page has more than one interface, a variety of layouts, our general choice is nothing more

Android uses xUtils3.0 to implement file uploads _android

A few months ago wrote a blog "xUtils3.0 Framework Learning Notes", there are records through the xutils implementation of File upload method, the code is as follows: private void Uploadonclick (View v) { String upurl =

Android Push principle (Android push Notification) detailed _android

Android Push principle Since the recent project involved Android push, I saw something about Android push, and we know that the Android push can come down to 3 kinds of implementations: 1, POLL, pull. The general idea is to send the request to the

Detailed introduction to the Android application class _android

Android Application class: Detailed explanation for the application class in Android: In peacetime development, we may sometimes need some global data, so that all the activity and view in the application can be accessed, when you encounter this

Android Development-a variety of ways to monitor button click events _android

Under Android, events occur under the listener, and the Android system responds to keystroke events and touch-screen events, and this article mainly introduces the button click event Method. One, the realization button clicks the event the method

The implementation of the No-trace transition Pull-down Control for Android Development detailed _android

I believe everyone has been familiar with the Drop-down refresh can not be familiar with the market on the Drop-down refresh dazzling, but there are many in my opinion slightly flawed, then I will explain the existence of defects, and then provide a

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