best drawing app

Use a simple drawing app to illustrate Android's graphics-processing class with its own view-defining application.For example, there is an app for users to draw and doodle at their own discretion.It's not so fancy here, it's only available in black and white. But it can change the thickness of the nib.Essentially the eraser here is a white brush, without using th

First, the Android side of the lagThe Android app is prone to lag during specific use, such as having a meal when viewing a page, a slow response after switching tabs, or a slow operation when it comes to sliding.Second, the reasons for the lagThere may be many reasons for the lag, such as:1. High CPU2. Memory Overflow3. Main thread processing IO operation, etc....Where over-drawn, is an easy to ignore but also best to modify and can see the effect of

supports the brush, such as spritevisual. Remember, be sure to set the object's Size property , because the default value is 0, otherwise it will not be displayed, here, I directly with an expression animation, let its size follow the size of the Canvas.This method is encapsulated so that it can be called in the appropriate place to draw the content, such as in the constructor of the page class. Public MainPage () { this. InitializeComponent (); drawsomethin

them, Nnibsize is what I call a dot pixel (100*100). An example would be clearer:* My device is 5.7inch, resolution is 1920*1080 (PX), calculate the device PPIThis is to get my device PPI. And my device was filed near the drawable? I debug my Code, I found 800*800 picture placed under-HDPI, get the size of the figure for 1467*1467, why this is the value. In the above code, I obtained a nearest pixel density, found that dm.density obtained a value of 2.75, that is, our 386 pixel density near the

(image:didFinishSavingWithError:contextInfo:), nil);}-(void) Image: (UIImage *) image didfinishsavingwitherror: (nserror *) error ContextInfo: (void *) ContextInfo{if (Error) {[Mbprogresshud showerror:@ "Save failed, please check if the app has access to the album"];} else {[Mbprogresshud showsuccess:@ "save Success"];}}8. Create a new class for Captureview(used to, only need to send in the required view)In the CaptureView.h+ (UIImage *) Captureimage

Drag a polygon from the toolbar, draw a hexagon, press and hold down the shortcut key to reduce the number of sides of the polygon, thus drawing a triangle, fill the color. Select a triangle with the selection tool to change the shape of the triangle by stretchingHover the cursor over the corner of the triangle, and an arc will rotate the moving triangle.Overlap The two triangles and place the inverted triangles at the top level. If the inverted trian

as the rectangle we were allow to draw on. * We do this to chache the bitmap so We don ' t need to * Recreate it each time draw () is called since it * Takes a few milliseconds. */ private void Generatepatternbitmap () { if (getbounds (). Width () 0 | | getbounds (). Height () 0) { return; } Mbitmap = Bitmap.createbitmap (GetBounds (). Width (), getbounds (). Height (), config.argb_8888); Canvas canvas = new Canvas (MBITMAP); Rect r = new Rect (); Boolean

; pathfigure> pathfigurecollection> pathgeometry.figures> pathgeometry> geometrygroup> path.data> Path> This picture took me a long time, I hope you will also draw, although the role is not small, but it is good to spend fun.I've probably added some markup on the graph, and the RectangleGeometry rect attribute has 2 va

#include #include #include #include #include #include using namespace Std;Bresenham Drawing Linevoid Bresenham_line (int x0,int y0,int x1,int y1){int x,y,dx,dy;float k,e;dx=x1-x0;Dy=y1-y0;k=dy/dx;//here is the initialization of the completion K valuee=-0.5;x=x0;Y=y0;Here I always add a word to the end, y this is optional add one or do not addfor (int i=0;i{The function of drawing pointsPutpixel (x,y,255);x=

Ios drawing, drawing coordinate system, drawing Coordinate SystemLet's take a look at the effect: Create a View class and add the Code directly: // Only override drawRect: if you perform custom drawing. // An empty implementation adversely affects performance during animation. -(void) drawRect :( CGRect) rect {// obt

); //Canvas.drawtext (OFS, N, +, paint);//Drawing text TextOFS++; } Catch(Exception e) {log.i (E.getmessage (). toString (),NULL); //Todo:handle Exception } }}Update::The previous idea is to take the class that inherits the view as the canvas, what is the problem? You cannot add a button control to this view canvas because the button is also integrated in the viewChange the ideaActivity StageClasses that inherit from view are spritesAccordin

Let's take a look at the effect:Watermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqv/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/dissolve/70/gravity /center "/>creates a new view class. To add code directly:Only override Drawrect:if-perform custom drawing.//an empty implementation adversely affects performance during a nimation.-(void) DrawRect: (cgrect) rect{//Get current environment cgcontextref context = Uigraphicsgetcurrentcontext (); Save

123456789Ten at - About $ - -[HTML canvas drawing text] Canvas drawing implements drawing text Stroketext Filltext method and TextAlign textbaseline Font Property Instance Demo

1 [HTML Createpattern Drawing background tiling method] Canvas drawing picture Createpattern Drawing Background Tiling Mode Property instance

public class Mainactivity extends Activity {private ImageView iv;float StartX = 0;float Starty = 0;//Get a can be bitmapbitmap b Itmap = Bitmap.createbitmap (n, 400,bitmap.config.argb_8888);//Create a canvas canvas canvas = new canvas

PrefaceAn excellent application is not only to have attractive features and interactions, but also to have high performance requirements. Mobile phone running Android system, although the configuration in the continuous upgrade, but still can not be compared with the PC, the PC does not have the same large memory and high-performance CPU, so in the development of Android applications can not be unlimited use of CPU and memory, Improper use of CPU and memory can also cause problems such as applic

each color block represents an executing process, and the length of the color block represents its execution time, as shown in.In the figure CPU 0 mainly executes ADBB thread and Inputreader thread, CPU 2 mainly executes Surfaceflinger thread and Renderthread thread in ordinatorlayout process, we click Renderthread color block, will give information about the Renderthread, as shown in.The graph shows information such as the threads and processes that the current color block is running, the open

(20, 120, 250, 120) Pen.setstyle (QtCore.Qt.DotLine) qp.setpen (pen) qp.drawline (20, 160, 250, 160) Pen.setstyle (QtCore.Qt.DashDotDotLine) qp.setpen (pen) qp.drawline (20, 200, 250, 200) Pen.setstyle (QtCore.Qt.CustomDashLine) Pen.setdashpattern ([1, 4, 5, 4]) Qp.setpen (pen) qp.drawline (20, 240, 250, 240)Together, drawing.py is like this:#-*-coding:utf-8-*-"""Module implementing Drawing."""ImportSYS fromPyQt5ImportQtgui, Qtcore fromPyqt5.qtwidget

Python chart drawing: Getting Started with the Matplotlib drawing library Matplotlib is Python's most famous drawing library, which provides a complete set of command APIs similar to MATLAB, and is ideal for interactive line drawing. It can also be conveniently embedded in GUI applications as a

Matplotlib is Python's most famous drawing library, which provides a complete set of command APIs similar to those of MATLAB, and is ideal for interactive line mapping. It can also be easily used as a drawing control, embedded in GUI applications.Its documentation is quite complete, and there are hundreds of thumbnails on the gallery page, and the source program opens. So if you need to draw some kind of di