First PartIn Android development, when writing layout code, the IDE can see the layout Preview.However, some effects must be run before they can be seen, like this: TextView does not set any characters in the XML, but instead sets the text in the activity. So in order to preview the effect in the IDE, you must set the Android:text property for the TextView control in XM
LinearLayout, and to set Layaout_width to Fill_parent,oriantatioan set to horizontal, the layout_ of its child view Width is set to 0dip, and the set weight value is set by the percentage. The code is as follows: Android:id= "@+id/ll_listview"android:orientation= "Horizontal"Android:layout_width= "Match_parent"android:layout_height= "Wrap_content"android:paddingtop= "10dip"Android:paddingbottom= "10dip"android:gravity= "Center">Android:layout_gravity= "Center_vertical"Android:layout_width= "0d
@ Everyone is familiar with it. For example, @ + id/... @ string /...
See the following code:
[Html]Android: id = "@ + id/firstProgressBar"Style = "? Android: progressBarStyleHorizontal"Android: layout_width = "200dp"Android: layout_height = "wrap_content"Android: visibility
Android. view. InflateException: Binary XML file line #95: Error inflating class (out of m ),
Today's exception is very interesting, called android. view. InflateException: Binary XML file line #95: Error inflating class (out of memory ).
Because of the out of memory, xml ca
XML file formatting configuration for Android projects in eclipse
Using ADT in eclipse to develop Android is very convenient, but it is not satisfactory, for example, the formatting Effect of XML files is not ideal. By default, the visual interface layout of the ADT is used. In the automatically generated
SAX is an xml parser with high resolution speed and low memory usage. It is suitable for Android and other mobile devices. An event-driven file is used to parse an XML file. That is to say, it does not need to parse a complete file. In the process of parsing a document in order of content, SAX checks whether the currently read characters are valid for a part of t
If SetContentView (new HellwView (this) is used all the time, it seems that there is always something missing, and the accessibility of defining components using XML in Android is lost, this is quite unpleasant. In this section, we will see a solution to the custom View error. Let's look at the definition of the View in XML.
1. A small error defining View in
If SetContentView (new HellwView (this) is used all the time, it seems that there is always something missing, and the accessibility of defining components using XML in Android is lost, this is quite unpleasant. In this section, we will see a solution to the custom View error. Let's look at the definition of the View in XML.
1. A small error defining View in
Android: Dom parsing XML
Unlike the parsing of SAX and PULL, Dom parsing loads all XML files and assembles them into a Dom tree. Then, XML files are parsed through the relationship between nodes and nodes, occupying a large amount of memory, it is generally recommended to use SAX and PULL for parsing. Use the same exam
Android supports three bitmap formats: .png(),,,,,,.jpg(you can accept registry.gif (not recommended ).
You can use the bitmap file name as the resource ID to directly reference the bitmap file, or define a resource alias in XML.
Note: during the program build process, the bitmap file will be automatically compressed by the aapt tool to optimize it. For example, if a fully colored PNG Image requires no more
From: http://blog.csdn.net/android_tutor/article/details/5508615
InXMLWe are used to defining the properties of controls in the file.Android: attrs = ""Can we define our own attributes, for example:Test: attrs = ""What about it? The answer is yes.
Well, I will not turn to the topic. I will go directly to the topic. Perform the following steps:
I,InRes/ValuesFile definesAttrs. xmlFile. The Code is as follows:
[Java]
View plaincopy
1. Define an attrs. x
Android uses XML to define the MenuAdding menu items directly to the code and grouping menu items. This is a traditional practice and it has some shortcomings.For example, to respond to each menu item, we need to use constants to save the ID of each menu item.Therefore, Android provides a better way to define a menu as a resource of an application, and use
1. Pull Overview
In the Android system, the XML-related package is org. xmlpull. V1. This package not only providesXmlserializerAnd provides a pull Parser for parsing XML.Xmlpullparser
Xmlserializer does not extract XML events like xmlpullparser, but instead pushes them to the data stream outputstream or writer.
Xmlserializer provides intuitive APIs, including st
What is XML?First let's take a look at what XML is. XML, Extensible Markup Language (extensible Markup Language), used to mark an electronic file with a structured markup language that can be used to mark data, define data types, is a source language that allows users to define their own markup language, which is explained by Baidu Encyclopedia. While
the documentbuilder object from documentbuilderfactory to create and parse XML documents on Android devices. You will use the extension of the XML pull parser to parse the XML document.
Code
/** Create XML in Dom mode */
Running result:
3. Dom parsing
Objective
This article mainly describes how to parse XML files in Android. The main use is the sax mechanism, sax is all called Simple APIs for XML, which is both an interface and a software package. As an interface, sax is a standard interface for event-driven XML parsing. There are generally 2 ways to parse
In the process of parsing XML files, it is found that the API documentation does not provide detailed description of parsing events, which brings a lot of troubles to parsing XML files, today we have a demo of Event Type Analysis to share with you.
Step 1: Create an Android project file without any changes. You only need to write an xmlTest () method in the onCre
I collected a bunch of Android code from the Internet, such as the login program of Android and the helloworld program of Android, but I still cannot run a correct program correctly. I 've been depressed for a long time, finally, after a test, the program of the self-built project was successfully run in the android si
In Andriod Study Notes (3): Andriod program framework, we have a preliminary understanding of the main. xml file. This time, we will first learn the relationship between Activity and main. xml.
Although we can use java code to compile the UI, the more common method is to use the XML-based Layout file, which is used to describe the relationship between the widget
Android has integrated the pull interpreter, so you do not need to add a jar file. If you use pull in Java EE, You need to manually add the pull jar file. The android system uses the pull interpreter to process xml files. Therefore, pull is superior.1. main. xmlXmlns: tools = "http://schemas.android.com/tools"Android:
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