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developer these advanced knowledge (the hermit has beenImmerse in Android 2.2) gave it a bit, it's a lot of fun.Start: In order to avoid ambiguity, the Android "Layout" The meaning of the first time to explain, mainly the following three aspects:1, collectively, that is, how to display ui,ui rendering effect, etc.;2, layout documents, namely/res/layout/xxx.xml;3, layout process,
Note: This article is translated from:Http://developer.android.com/guide/topics/graphics/2d-graphics.html
Drawing on a view object
If the applicationProgramThere is no need for a large amount of graphic processing or a high frame rate (such as a chess game, Snake game, or another slow animation application), you should consider creating a custom view component, and use the view of this component. the canvas parameter of the ondraw () method to dra
The Double Buffer technology is mainly used for drawing and animation effects. The principle is to load resources to the buffer zone first, and then load the buffer to the View. The dual-buffer technology can effectively prevent flickering and improve the display quality.
DrawView. java:
Package com. example. handdraw;
Import android. content. Context;
Import android
In order to use OpenGL ES drawing in an Android app, you first have to create a view container. One of the simplest methods is to implement Glsurfaceview and Glsurfaceview.renderer. Glsurfaceview A view container to display OpenGL-drawn graphics, glsurfaceview.renderer to control the drawing of graphics inside the Glsurfaceview. For more information, please refer
. But these methods are all: the Onmeasure () method, the OnLayout () method, the OnDraw () method.Onmeasure () Method: Single view, generally override this method, for the Wrap_content case, specify the view default size value, to avoid the match_parent situation consistent. ViewGroup, if not rewritten, executes the same logic as the list view and does not measure sub-view. The Onmeasure () method is generally overridden to iterate through the sub-view.**onlayout () Method: * * Single view, do
OverviewIn the previous article, the drawing process of the Android view (top)--view The measure process of the view is described in detail. For the entire process of drawing the view, after measuring the size of the view, you start to determine the location of the view and draw it to the screen. The layout and draw process of the view. So take a look at how thes
It is not uncommon to refer to the text resources of other programs in Android, but it is sometimes necessary to refer mostly to the text resources of the system's programs.
Here's a super simple example to show how to do this.
Copy Code code as follows:
public void testuseandroidstring () {
Context context = GetContext ();resources res = NULL;t
Original address: http://blog.csdn.net/xu_fu/article/details/7829721The design of the view structure of the Android system also adopts the combination mode, that is, the view as the base class of all the graphs, viewgroup the view inheritance into the views container class, thus obtains the basic structure of the view part-tree structureView defines the basic operation of the drawingThe basic operation is done by three functions: measure (), layout ()
What are the common methods of Android drawing, the following one by one for you to enumerate:
1, about the brush (Paint) method
Paint mpaint= new Paint ();
Mpaint.setantialias (TRUE); Anti-aliasing
mpaint.setstrokewidth (mcirclewidth);//Set the width of the ring
Mpaint.setstrokecap (Paint.Cap.ROUND); Defines a segment breakpoint shape as rounded head
Mpaint.setantialias (TRUE);//Anti-aliasing
Mpai
* 300f: Upper y axis coordinates + * 400f: Left x axis coordinates - * 600f: Lower y-axis coordinates the * Mpaint: Brushes * */ $ //DrawOval () This method may be reported red after writing, the reason is to ask Minsdkversion for 21, go to Gradle file to modify it just finePanax NotoginsengCanvas.drawoval ( -, -, -, -, mpaint); - /** the * Canvas Draws a line of words + */ AMpaint.settextsize ( -); the Mpaint.setcolor (color.red); +Canvas.drawtext ("Custom Vi
I don't need OpenGL ES drawing for a long time, so I'm afraid I forget it. So I review it again. By the way, the principles are summarized as follows:
1. Android 3D Coordinate System
In Android 3D Coordinate System:
Coordinates are located in the center,
The X axis is extended from left to right. The value on the left of the origin is negative and the value on
ObjectiveThis is already an analysis of the Android UI drawing process of the fifth article of the series, no accident is also the last article. Again, this series of articles is my reading of the csdn Daniel Guo Lin's blog post, "Take you step-in-depth understanding of view" after the practice.In turn, we learned about the inflate process and the three steps to draw the view: measure, layout, draw. This ti
This article original, reproduced please indicate the source: http://blog.csdn.net/qinjuningTranslation three:Optimizing viewsFor more information on how to design a custom view and respond to touch time, see Android Developer:Address: http://developer.android.com/training/custom-views/index.htmlThis article translated address: optimizing the ViewWith the previous study, the well-designed view is now capable of responding to gestures and transitions b
This article translated from: http://developer.android.com/guide/topics/graphics/2d-graphics.html
Drawing
Android provides a custom 2D graphics class library for drawing graphics and images. The android. Graphics. drawable package can find a common class used to draw two-dimensional images.
This article describes how t
:In fact, throw away the Android platform, no matter what platform, to do such a game. All need these logic. For Android platforms. Let's take a look at the drawing frame of the Surfaceview.Direct Sticker Code:Package edu.njupt.zhb.game.view;/** * * @author Zheng Haibo * @webset: Http://www.mobctrl.net * @android Deve
lines and curves to the Path object, and then draw the shapes with the DrawPath () method. Just these base shapes can define their path style through the SetStyle () method.
You can define a gradient fill pattern by creating a LinearGradient object. Call the Setshader () method to populate the shape.
Draws a bitmap by using the Drawbitmap () method.
For example, the following code is used to draw a piechart. It mixes text, lines, and shapes.protected void OnDraw(Canvas canvas) {Sup
a simple drawing board development reprint please indicate source:http://blog.csdn.net/u012637501
(
embedded _ small J Sky )
first, drawing board principle1. Linear effectThe drawing board can appear on the surface of the user on the touch screen freely draw arbitrary graphics, but in fact , when the user moves on the touch scr
Note: This article translated from: http://developer.android.com/guide/topics/graphics/2d-graphics.html
The android framework API provides a set of 2D plotting APIs that can render custom images on a canvas and modify existing view objects, to customize their appearance and visual effects. When drawing a 2D image, you usually need to use one of the following two methods:
1. Draw a graph or animation to a vi
Android is a system that most people use, so how do you view the CAD home drawings for Android phones? There are a lot of small partners to be troubled, the method is actually very simple, just need to install the rapid CAD in the application shop to see the picture, the software can be from the layer, layout space for CAD home drawings of the detailed view, and today to share how I look at the CAD drawings
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