android recyclerview adapter

An important control in Android is the ListView, which displays data bindings in the ListView by enabling the user to implement the Baseadapter class to connect the ListView and data lists. Adapter mode connects two incompatible interfaces, enabling two of the two interfaces that do not work together to implement the functions that work together.The example validates the

I. Demand analysisIn the ordinary course of Android development. ListView, gridview adaptation of the writing is a very troublesome and very repetitive things, each time need to consider performance optimization, item writing, access to network images when the information confusion and other issues. So consider writing to implement a generic adapter that mainly considers the functionality:(1) Adaptive item

the ListView* Fourth parameter: is the array representation of the key of map* Fifth parameter: Make us list*/MapMmap1.put ("title", "I am the first feature");Mmap1.put ("icon", R.drawable.ic_launcher);MapMmap2.put ("title", "I am the second function");Mmap2.put ("icon", R.drawable.ic_launcher);MapMmap3.put ("title", "I am a third function");Mmap3.put ("icon", R.drawable.ic_launcher);Data.add (MMAP1);Data.add (MMAP2);Data.add (MMAP3);Mlistview.setadapter (New Simpleadapter (this, data, R.layout

data, such as hundreds, consumes a lot of system resourcesWorkaround: Reduce View creation times1, determine whether Convertview has been created, if created directly using the data binding@override Public View GetView (int position, view Convertview, ViewGroup parent) { ifnull) { null); return}This reduces the number of views created and improves efficiency, but the binding of the data is still not efficient, so it is inefficient to use the method below to improve efficienc

Structure Inheritance relationship Public class simplecusroradapter extendsResourcecusoradpater Java. Lang. Object Android. widget. baseadapter Android. widget. cursoradapter Android. widget. resourcecusoradapter Android. widget. simplecusoradapter Class Overview This is an easy-to-use

The project uses listview. Because imageview is used, the image source is not in the resource and the resource ID cannot be used. Therefore, simpleadapter cannot be used directly and you must write an adapter yourself. When using listview and adapter, pay attention to the following points: 1. Adapter. getview () Public View getview (INT position, view conve

The adapter is a bridge class that binds data to the UI. The adapter is responsible for creating a sub-view that displays each item and providing access to the lower-level data. It fills the data in listview, gridview, gallery. The Android system provides several adapters: arrayadapter Baseadapter, arrayadapter, simplecursoradapter, etc. Shows the relationship am

Adapter Error in Android:The content of the adapter has changed but the ListView does not receive a notification. Make sure the content of your adapter are not modified from a background thread, but only from the UI thread.Analysis:This error is often the case that a ListView and other controls may pass in a static list when using the

ListView is the most commonly used control in development, but it always writes repetitive code, wasting time without meaning. Recent reference to some information, found a universal ListView adapter, less code, save time, summed up to share to everyone. First there is a custom adapter inherited from Baseadapter, the following is a custom adapter, the essence o

The ListView is the most commonly used control for Android development, and the adapter adapter is the data that will be displayed in the view and added to the ListView displayWhen implementing the ListView, we need to define the adapters such as Baseadapter, Arrayadapter, CursorAdapter, Simpleadapter, and so on, and rewrite them for a few four methods:1 public i

There are too many code controls in the past. Due to the project time issue, we seldom take into account the optimization details. Today we will briefly discuss the optimization effect of the listview control when using the adapter: good direct texture: Let's first look at the comparison effect: When converview is not determined to be empty, that is, the time consumed for loading is: When the convertview is null, Cai reloads the data, that is, the c

Android adapter tutorial (2) The last time I wrote something similar to the preface, I gave you a rough introduction to what is an adapter, and gave you a simple example to help you understand it. I used the android native ArrayAdapter.,Now let's continue to learn further, and add examples in our previous Demo project,

1. IntroductionThe role of adapter is to bridge the interface between the Gridview,listview and the data, and calls the GetView method to adapter whenever each item in the list is displayed to the page.Returns a view. There are several adapter that implement ListAdapter in the Android API, each of which is baseadapter,