bitmap mask

Common bitmap Processing Methods in Android A lot of bitmap-related processing methods have been collected, and almost all of them are applied to projects! Package com. tmacsky. utils; import java. io. byteArrayOutputStream; import java. io. IOException; import android. content. context; import android. content. res. resources; import android. graphics. bitmap;

Through the previous study, I have a certain understanding of the core part of Android painting. Later, we will introduce in detail the use of various painting objects in Android, first, we will introduce the most commonly used Bitmap (Bitmap ). Bitmap is the most commonly used resource in our development. After all, a beautiful interface is the most attractive t

. Arbitrarily deduct one to two pieces of rectangle, after processing picture:　　 8, in the Layer panel, select all of these path objects (note Do not group the background bitmap into the vector group). Select the Modify menu, combine paths, merge (Ctrl+j).9, the full selection of the image, the bitmap for the Mask

In Android applications, image resources are the most memory-consuming resources. In addition, in the Android system, when reading bitmap, the size of the image stack assigned to the virtual machine is only 8 Mb. If the size exceeds the threshold, an outofmemory exception occurs. Therefore, image memory optimization is an important part in Android application development. 　　1) reclaim the bitmap memory in t

/* Just from the book to see the bitmap index, they have passed the test, so now learn to sell, I hope to have no understanding of the people to help * * A B-tree index is a common index in Oracle, which is the default index type when creating an index. You can include up to 32 columns. Bitmap index Oracle creates a bitmap for each unique key, and then sav

1. Conceptual differences: Many netizens have just started to learn Android platform, the concept of drawable, Bitmap, canvas and paint is not very clear, in fact they are in addition to the drawable in the sun as early as the J2ME has appeared, but in the Android platform, Bitmap, canvas related have changed. Let's first understand that the display class in the Android platform is view, but it also provi

There is a lot of information about bitmap file operations. In order to facilitate the work of the developer, write down this article, introduce the bitmap file structure, on the basis of this design general class Cfg_dib, for bitmap file read and write operation. First, bitmap file structure The

In Android applications, image resources are the most memory-consuming resources. In addition, in the Android system, when reading bitmap, the size of the image stack assigned to the virtual machine is only 8 Mb. If the size exceeds the threshold, an outofmemory exception occurs. Therefore, image memory optimization is an important part in Android application development. 1) reclaim the bitmap memory in ti

[Switch] compatible with the CDC to save the entire screen program and further thoughts // Hwnd getasktopwindow () returns the handle of the desktop windowCDC * pdeskdc = getdesktopwindow ()-> getdc (); // obtain the pointer (handle) of the context of the desktop window) Crect rect;Getclienttopwindow ()-> getclientrect (rect); // obtain the customer region of the desktop screen CDC memdc; // defines a memory Context// HDC createcompatibledc (HDC), which creates a memory device context environme

1) reclaim the Bitmap memory in time The Bitmap class has a recycle () method. The method name indicates recycling. Here I have doubts. The Android system has its own garbage collection mechanism, which can occasionally recycle unused memory space, including Bitmap space. So why do we still need this method? The construction methods of the

Void caboutdlg: transparentblt2 (HDC hdcdest, // Target DC Int nxorigindest, // target x offset Int nyorigindest, // target y offset Int nwidthdest, // target width Int nheightdest, // target height HDC hdcsrc, // source DC Int nxoriginsrc, // source X start point Int nyoriginsrc, // source y start point Int nwidthsrc, // Source width Int nheightsrc, // source height Uint crtransparent // transparent color, colorref type ) { Hbitmap holdimagebmp, himagebmp = createcompatiblebitmap (hdcdest, nwid

Reprint please indicate this article from Xiaanming's blog (http://blog.csdn.net/xiaanming/article/details/41084843), please respect others ' hard work results, thank you!We know that the memory allocated to each application by the Android system is limited, and bitmap as a major drain on memory, and our management of bitmap may lead to OutOfMemoryError, There are some differences between the

Bitmap Source code example in Android development Package android.graphics; Import Java.awt.image.BufferedImage; Import Java.io.File; Import java.io.IOException; Import Java.io.InputStream; Import Javax.imageio.ImageIO; Public final class Bitmap extends _original_bitmap { Private BufferedImage mimage; Public Bitmap (File input) throws IOException { Supe

+ speed;if (Delta_time > 0) {if (!notifidraw (nowposition)) {return;}} This.sendemptymessagedelayed (Msg_paint, 10);}} Private Boolean Notifidraw (long position) {System.out.println ("nofitydrawtoatal =" + position); if (Position III. realization of specific explanations1. Initialize operations in the construction methodpublic Splashimageview (context context, AttributeSet Attrs) {Super (context, attrs); TypedArray a = context.obtainstyledattributes (attrs,r.styleable.fuseimageview, 0, 0); int

Drawing bitmaps) It seems difficult to draw a bitmap. However, as you can see several times, it is very easy to draw a bitmap. The TCanvas class has several ways to draw a bitmap. The most common method is the draw method. This method only draws a bitmap at a specified position on the canvas. You have seen several such

On Android, the Bitmap object is transferred between two activities. On Android, the Bitmap object is transferred between two activities. Because I am not doing Android applications for a long time, when I first pass Bitmap objects between android systems, I directly use Intent. the putExtra method was implemented. At that time, I chose an Image ROI region, so it

Recently began to learn the image processing knowledge, think of the previous has done to the picture to add text watermark, however, was still in the former company, time is also very long, this time when the review. The watermark here is to add a text tag inside the picture, which is usually used to mark the copyright. To improve reusability, I encapsulated the implementation of this feature into a class. Implementation principle: 1. Load a bitmap i

In Android apps, the most memory-intensive is the picture resource. And on Android, when reading bitmap bitmap, the stack size of the pictures in the virtual machine is only 8M, and if exceeded, a outofmemory exception occurs. Therefore, the memory optimization of the image is an important part of Android application development. 1) to recover bitmap memory in t

Bitmaps are the most commonly used resource in our development, after all, a beautiful interface is the most attractive to the user.1. Getting a bitmap from a resourceYou can use bitmapdrawable or bitmapfactory to get a bitmap from a resource.Of course, you need to get resources first:Resources res=getresources ();Get a bitmap using bitmapdrawable Use Bi

In Android apps, the most memory-intensive is the picture resource. And on Android , when reading bitmap bitmap, the stack size of the pictures in the virtual machine is only 8M, and if exceeded, a outofmemory exception occurs. Therefore, the memory optimization of the image is an important part of Android application development.1) to recover bitmap memory in ti