drawing programs for android

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One of the view drawing optimizations in Android----optimize the layout hierarchy

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,

Android canvas and drawing-canvas and drawables (2)

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

Drawing with double buffering technology for Android Development

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

One of the Android OpenGL ES drawing tutorials: Building an OpenGL ES environment

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

Android Interview Collection record view measurement, layout and drawing principles

. 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

Drawing process for Android view (bottom)--view layout and draw process

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

Text resources that refer to other programs in Android super Simple method _android

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

Summary of Android-view drawing principle

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 ()

Android Drawing Common Methods Summary _android

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

Android Custom View self-drawing controls

* 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

Android learning notes: OpenGL drawing Summary

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

Advanced article-user interface: 5.android Drawing API Custom View (view)

(); } PublicMyView (Context context, AttributeSet attrs) {Super(context, attrs); Init (); } PublicMyView (context context, AttributeSet attrs,intdefstyleattr) { Super(context, attrs, defstyleattr); Init (); } Private voidinit () {p=NewPaint (); P.setcolor (color.red); } @Override Public voidDraw (canvas canvas) {Super. Draw (canvas); Canvas.save (); Canvas.translate (200,200); Canvas.rotate (degrees,50,50); Canvas.drawrect (0, 0, 100, 100, p); Degrees++;

An analysis of the drawing process of Android UI (v) Custom view

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

The three----optimization view of view drawing optimization in Android

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

Android canvas and drawing-canvas and drawables (3)

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

Android: How to use a day to write "aircraft war" this game! (No frame-surfaceview drawing)

: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

Android Official Development Document Training Series Course Chinese: Create a custom View view drawing

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

Android Note 29. A simple drawing board development

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

Android canvas and drawing-canvas and drawables (1)

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

How to open CAD home drawing on Android system

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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