list of android versions

line, until the painting is finished, the front of these things to pave, continue ... Now we come to understand the principle of ListView loading data, with this understanding of the optimization after the line, the following first with you to see the basic principles of ListView Loading data directly written: The working principle of ListView is as follows: ListView for each item, the adapter "return a View" (GetView) is required, which means that the system first invokes the GetCount () fu

Today I learned the spinner component, using spinner as the equivalent of selecting a project from the drop-down list, the following shows the use of spinner (using Arrayadapter and custom adapter implementations respectively)(a): Use Arrayadapter to fit data:①: First define a layout file:1 spanstyle= "FONT-SIZE:16PX;">XML version= "1.0" encoding= "Utf-8"?>2 LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/

parent layout_centerVertical:To true , place the subclass in the center of the parent class layout_below:Place the view below the resource ID layout_toRightOf:Place the view to the right of the resource ID GridViewGrid layoutGridViewis actually a grid-like view component, which is a ViewGroup two-dimensional view. The layout can be populated with an adapter.ListView List ComponentListViewis a scrollable view group for displaying list

The project implements the following functions :Get Mobile album, click on each album to enter the picture list of the album interface, in the Picture list interface can achieve multiple selection of pictures, and then into the selected image interface, in this interface can achieve the selected image upload and other functions.the biggest feature of the project:1, to obtain a

cannot be triggered.So here's how it's solved:Such as:Android:focusable= "false"When the button's Focusable property is set to False, the control is no longer able to get the focus, so naturally it is not possible to block out the ItemClick event of the ListView.Personally, Method 2 and Method 1 have a certain similarity, all in the ListView in the item gets the focus, thereby triggering the ItemClick event. If there are any different views, please leave a message and a small series of discussi

1ListView lv=(ListView) Findviewbyid (R.id.listview);2ListNewArraylist();3 //getting data from an array resource4String[] Data=getresources (). Getstringarray (R.array.haha);5 for(inti=0;i){6MapNewHashmap();7Map.put ("img", r.drawable.b);8Map.put ("TXT", Data[i]);9 list.add (map);Ten } One //parameter list: Context object, list data, list item la

We have noticed that the buttons in some applications are not the same as the normal state when they are clicked, such as:In normal state: In the selected state:How is this effect achieved? In the Android system provides us with a convenient and to implement this function, namely: State list drawable.statelistdrawable is a drawable object defined in XML, we can display different states by setting a picture

subscription can only receive data that is emitted later. ConnectThe Connect operator is used to trigger connectable observable emission data.After applying the Connect operator, a subscription object is returned, and through this subscription object, we can invoke its Unsubscribe method to terminate the transmission of the data.In addition, the Connect operator can be used to start transmitting data if there is no subscriber subscription. RefCountThe refcount operator converts a connec

Qt do Android development, sometimes need network information, this example is to get a phone search to the signal strong WIFI signal list. The knowledge of JNI is needed in the process. In addition, the example is relatively simple, if you need this, you can modify it yourself.The program is divided into two parts, one is the JAVA program writing, one is the Qt main program of the writing, as to the Androi

Private Spinner Spinner ; Private list List ; Private arrayadapter Arrayadapter ; @Override protected void onCreate (Bundle savedinstancestate) { Super. OnCreate (savedinstancestate);Setcontentview (r.layout. Activity_main); Spinner= (Spinner) Findviewbyid (r.id. Spinner1); List= New arraylist //new Arrayadapter Adapter Arrayadapter=New arrayadapter This ,

I get bored with reading many things: extjs is the most intense for me. Even, sometimes the design is aesthetic fatigue.When I look at the right corner, I want to see the rounded corner. I don't know when, in the past few years, there has been a burst of rounded corner design wind: The new CSS standard includes the rounded corner elements, and the rounded corner design is almost everywhere on the iPhone, there are also a lot of rounded corner business cards...Today, we will implement a rounded l

Android intent transmits list or object, androidintent (To: http://www.cnblogs.com/lee0oo0/archive/2012/09/24/2699805.html) Method 1:If you simply pass List Java code 1 intent.putStringArrayListExtra(name, value) 2 intent.putIntegerArrayListExtra(name, value) Method 2:If List 1 putExtras(key, (Serializable)

Usage ScenariosAutocompleteedittext the drop-down list only if you start typing and match the characters you have entered. The disadvantage of spinner is that it cannot be edited. So this article describes how to use the edittext+ Listpopupwindow implements an editable drop-down list. The usage scenario can be a login box with the Remember password feature.Add up and down arrows to EditTextWe need an arrow

The example in this article describes the way the intent passes list or object in Android. Share to everyone for your reference. The implementation methods are as follows: Method One: If you simply pass list The code is as follows: Copy Code code as follows: Intent.putstringarraylistextra (name, value) Intent.putintegerarraylistextra (name, val

>Uiactivity4.java PackageCom.hanqi.test5;ImportAndroid.os.Bundle;Importandroid.support.v7.app.AppCompatActivity;ImportAndroid.widget.ListView;ImportAndroid.widget.SimpleAdapter;Importjava.util.ArrayList;Importjava.util.Hashtable;Importjava.util.List;ImportJava.util.Map; Public classUIActivity4extendsappcompatactivity {@Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate); Setcontentview (R.LAYOUT.ACTIVITY_UI4); ListView sa_1=(ListView) Findviewb

Custom Controls-android list grouping and letter navigation With the refactoring of the above two articles, it is very easy to refactor the ListView group list to a custom control. You only need to put the initialization operation in the constructor of the custom control. The restructured custom control is based on the annotation refactoring in the previous artic

During the development of the project. It is often necessary to delete information from the user list. There are two ways to delete operations that are used frequently in Android. One is that a similar swipe occurs when the button is deleted, and the other is selected by a checkbox. Then delete it by using the button. The original example integrates the above two modes of operation to achieve the effect of

ReproducedTroubleshoot Android SDK Manager updates, slow downloads, and the list of packages to install does not appearOriginal: http://www.cnblogs.com/tc310/archive/2012/12/21/2828450.htmlRecently in the Android project, found that the download SDK is too slow, but also listen to others said silently waiting for 2 days and 1 nights before finishing. This article

to achieve the final effect.This article GitHub: Welcome to StarHttps://github.com/AndroidMsky/SearchViewWelcome to add the author of the self-development of the Android Exchange Group: 308372687Bo Master original without permission shall not be reproduced, reproduced must investigate—————————————————————————————Recommended by the author: Android Custom view scrolling data displayhttp://blog.csdn.net/andro

---restore content starts---First, the previous paragraph codeSpinnerAndroid:id= "@+id/spin"Android:paddingtop= "10px"Android:layout_width= "Fill_parent"Android:layout_height= "50SP"/>ButtonAndroid:id= "@+id/addlist"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:text= "Add" />Second, next create a new drop-down list of view resources, that is, each item's TextView, we named it dropdown.xml, we put it in drawable, the