bitmap example

Original address: http://android.xsoftlab.net/training/displaying-bitmaps/index.htmlIntroductionLearn how to use a conventional means of handling and loading bitmap objects, which in addition to making the user interface responsive, avoids exceeding the memory limit. If you're not careful, the bitmap will quickly deplete those poor memory and cause the program to crash because it will produce a horrible exc

Bitmap memory usage computing and loading considerations, bitmap I was originally a TV app, but my company was nervous because I had to get out of my cell phone, so I called it Lei Feng! One of my functions is to process the app ICON in the mobile phone. Processing is nothing more than beautifying the app, merging and cropping the app with the baseboard again, and using a lot of

Bitmap cache mechanism, bitmap cacheThe Bitmap cache mechanism loads a bitmap to the UI, which is relatively simple and straightforward. However, if we load a large amount of bitmap data at a time, it becomes complicated. In many cases (for

Device-related bitmapDDB (device-dependent-Bitmap) DDB does not have its own color palette information. Its color mode must be consistent with that of the output device. For example, the pixel value stored in a bitmap with less than 256 colors is the index of the system palette, and its color depends on the system palette. Because DDB is highly dependent on the

32-Bit Bitmap to 24-Bit Bitmap Conversion (1) FunctionsIn many practical applications of image processing, we need to convert the Color Representation of the image (for example, converting a 32-bit color to a 24-bit color ). This article uses a simple example to illustrate the conversion process from 32-bit color to 24

don't want the top picture...Let's take a look at the folder in which you put the images.If you putIn the xxhdpi folder, the image is smaller than the actual one. Possible errors are listed by you.I am actually a screenshot. I get a Bitmap that includes the status bar. The problem status bar is still white. Now I want to remove the top part of the white and save it.You get the image bmpThen bmp. getHeight () is the height of the image, for

than the main UI thread, and return the results of the tasks to the main UI thread. You need to inherit the asynctask class and reload some provided methods to use this asynchronous task method. The following is an example Program Class bitmapworkertask extends asynctask {private final weakreference imageviewreference; private int DATA = 0; Public bitmapworkertask (imageview) {// use a weakreference to ensure the imageview can be garbage collected im

1. Overview Bitmap (bitmap) is a very common structure, which is widely used in indexes, data compression and so on. This paper introduces the realization method of bitmap and its application scene. 2. Bitmap implementation (1) RealizeIn the bitmap, each element is "0"

Bitmap method definitionBitmap method is bitmap abbreviation, so-called bitmap, is to use each bit to store a certain state, applicable to large-scale data, but the data state is not a lot of situations. It is often used to determine that a data store does not exist.For example, to determine the status of 10 million pe

The following is a specific analysis of a C + + program (DrawBmp.cpp, Borland C + + Builder 6.0 compile-run) //--------------------------------------------------------------------------- #include #pragma hdrstop#include "DrawBitmap.h"//---------------------------------------------------------------------------#pragma package (smart_init)#pragma resource "*.DFM"TForm1 *form1;typedef enum//define execution result for display bitmap operation{OK,//succ

tested on: MySQL 5.5.25The current version of the test is MySQL 5.5.25 There are only btree and hashes of two index types, default is Btree. There are bitmap indexes (bitmap indexes) in Oracle or other types of databases, which are also provided here as comparisons.Btree IndexBTree (Multi-path search tree, not binary) is a common data structure. Using the BTREE structure can significantly reduce the interme

, the bitmap and Pattern Painting in the current display area must be in sequence. For the gradual hiding, we need to combine the original bitmap with the pattern image, and then combine the result with the bitmap of the current display area and the image of the image painting brush (not the original image painting brush. You can change the painting brush in sequ

PHP implements bitmap sorting and intersection calculation, bitmap This example describes how to implement bitmap sorting and intersection in PHP. We will share this with you for your reference. The details are as follows: Initializes a string of all 0 binary; An unordered integer array exists; If integer x is in this

give 4 billion non-repeating unsigned integers, not sequenced. Given an unsigned integer, how can you efficiently determine whether the data is present. The direct idea is that we store these unsigned integers in memory and then make one by one comparisons with the given number. Let's analyze that an unsigned integer is 4 bytes, 4 billion * 4 bytes, 1 billion bytes is probably 4 G, and 4 billion unsigned integers are 16G Computer memory is generally not so big, even if there is such a large, bu

Reprint Please specify source: http://blog.csdn.net/zhaokaiqiang1992Bitmap's handling has always been a big problem in Android development, because with a little attention, bitmap will be able to eat all of our memory and then crash and exit! However, as long as we have mastered some of bitmap's common processing skills, we can effectively avoid this problem, henceforth no longer afraid of bitmap.The pictures have different shapes and sizes. In most c