3ddr ram

gridView.setSelector(new ColorDrawable(Color.TRANSPARENT));listView.setSelector(new ColorDrawable(Color.TRANSPARENT))；方法二，在布局文件中设置listSelector属性In addition, the ListView has two basic problemsQuestion 1: listview在拖动的时候背景图片消失变成黑色背景。等到拖动完毕我们自己的背景图片才显示出来。 解决办法： xml中： android:scrollingCache="false" 或者 android:cacheColorHint="#00000000" 代码中： setScrollingCacheEnabled(false) 或者 setCacheColorHint(0) 或者setCacheColorHint(Color.TRANSPARENT); 问题2： listview的上边和下边有黑色

Description of the Instruction format function in bytes I. Data Transmission commandsMoV A, RN register sends accumulators 1 1MoV RN, A accumulators send register 1 1MoV A, @ Ri internal RAM Unit sends the accumulators 1MoV @ Ri, A accumulators send internal RAM Unit 1MoV A, # data immediate data delivery accumulators 2 1MoV A, direct addressing Unit 2 1MoV direct, a accumulators send direct addressing Unit

define data segments. Note:: No more function body declaration # pragma; It must be declared before the symbol is defined and used # pragma Example: #pragma DATA_SECTION(data, "data_name");char data[100]; 4. CMD file In the dsp28335 project file (CMD files are generated without BIOS), there are generally two handwritten CMD files. The two CMD files used for debugging in RAM are dsp2833x_headers_nonbios.cmd and 28335_ram_lers_nk.cmd, r

8 KB of storage space. 15th slice is solidified as the boot block zone at the factory, which controls the initialization operation after resetting and provides flash programming methods. Therefore, the available FLASH space is only 120kb. The IAP program is solidified in the boot block. The IAP operation is based on the slice and occupies 32 bytes of RAM in the slice. The following table lists the number of sectors and storage addresses contained in

one subitem. The error "ScrollView can host only one direct child" is returned.Solution: In ScrollView, set LinearLayout as a subitem and add other views to LinearLayout. 33. viewpager setting spacing and caching viewPager.setOffscreenPageLimit(TOTAL_COUNT);viewPager.setPageMargin(getResources().getDimensionPixelSize(R.dimen.page_margin)); 34. What does a level-1 cache and level-2 Cache mean ??Static ram cache is called a level-1 cache, and later add

some additional overhead.MySQL 5.5 (and the 5.1 version with plug-in) agrees that you specify a block size of 8 KB or 4 KB. MySQL 5.5 can have multiple buffer pools, because each cache pool has a mutually exclusive lock, so setting up multiple pools can alleviate some mutually exclusive lock bottlenecks.Many other InnoDB tuning informationThere is also a way to calculate the cache sizeSet the primary cache to the minimum value; If there are many other applications running on the same machine, a

All copyrights shall not be reproduced without the consent of the author. Otherwise, they shall be deemed as infringement and the right to be held accountable shall be reserved. Chapter 1 hardware BasicsHardware is the operating platform of software, and software without hardware support will no longer exist. Can you imagine how graphics will be displayed without the display software and how will no CPU software run? I cannot imagine it! However, if you ask the question in turn, you will be ask

 1, the address space of the processIn a 32-bit operating system, the process has an address space of 0 to 4GB,As follows:Figure 1Here are the main instructions for stack and heap:Stack space (stack and stack) is controlled by the operating system, which mainly stores function addresses, function parameters, local variables, and so on, so the stack space does not need to be large, typically a few megabytes in size.The use of the heap space is controlled by the programmer, who can manipulate th

Http://blog.chinaunix.net/u2/69674/showart_1212448.html The operating system uses S3C2410. See the appendix start. S. The section about NAND Flash startup has been puzzling. It should be mapped to ngcs0 In the first 4 kb when it is started from NAND Flash.CodeStoreProgramThe program provided by the file is like copying the K code from NAND to the place where the resetentry starts, that is, the address is 0, then copy the resetentry to ram, but ngcs0

start the Linux kernel. 2.1 concepts and functions of bootloader Bootloader is the boot loader of an embedded system. It is the first program that runs after the system is powered on. It acts like the BIOS on a PC. After the system initialization task is completed, it will copy the Linux kernel in non-volatile memory (usually flash or Doc) to ram, then, the system jumps to the First Command of the kernel to start the Linux kernel. It can be seen that

Today, Dwight Silverman will give you a little knowledge. When we buy a computer, do we choose 32-bit Vista or try 64-bit vista? Before you answer this question, take a look at this knowledge first. The 64-bit version can effectively utilize more memory than the 4G-limited 32-bit Vista. As you can see from this sentence, 4 G is a watershed. Less than 4G of memory, 32-bit Vista is not mistaken, but more than 4G, you need 64-bit vista to take full advantage of such a large amount of memory. Peopl

Virtual Development Board reads and writes these register addresses, Skyeye intercepts these read and write operations, and convert them into calls to the functions nic_read and nic_write of the virtual 8019as network chip API, so as to operate the virtual 8019as network chip and send and receive data. This process is consistent with the logic operation of the real hardware system. So how does Skyeye communicate with the host while switching data packets with the virtual 8019as network chip? T

customers of the company; for small companies or enthusiasts (just like those in armjishu.com), technicians can define their own requirements and write them into documents. Requirements are usually defined based on the following factors: 1) Purpose of the system (define various functions that need to be implemented by the system) 2) How to Implement the actual input and output (for reference of component selection) 3) whether the system requires an operation interface (involving software-Layer

) 3) whether the system requires an operation interface (involving software-Layer Operating System Selection) In fact, for small embedded products, the definition requirements are very critical, because the requirements are clear, it can avoid the subsequent development process such as random memory (RAM) insufficient capacity or the selected CPU speed cannot meet the processing needs. ------------------------------------------------------------------

instead of calculationIn a situation where processor resources are tight and memory resources are relatively rich, it is possible to swap storage space for running speed. For example, if a sine or cosine function value is frequently calculated, the function value can be computed in advance and placed in memory for later arm lookups. (2) Make full use of the RAM in the chipSome manufacturers of ARM chips in the integration of a certain amount of

to Super User: Sudo-sH Create a WWW script: Mkdir/opt/mrtg Vim/opt/mrtg. www #! /Bin/bash All = 'netstat-a | grep www | awk {print $5} | sort | wc-l | awk {print $1-1 }' User = 'netstat-a | grep www | awk {print $5} | cut-d ": "-f1 | sort | uniq | wc-l | awk {print $1-1 }' If ["$ all" = "-1"]; then Echo 0 Else Echo $ all Fi If ["$ user" = "-1"]; then Echo 0 Else Echo $ user Fi UPtime = '/usr/bin/uptime | awk {print $3 "" $4 "" $5 }' Echo $ UPtime Hostname Run the following script: Chmod + 75

(RAM) insufficient capacity or the selected CPU speed cannot meet the processing needs. Bytes ----------------------------------------------------------------------------------------------------------The following is a simple example for your reference: System description: Water Pump swap System for Conghua Hot SpringPower Input: Use 9v ~ From the transformer ~ 12 V DCPump Power: 375 W1) use single-phase AC motor, controlled by Mechanical and Electri

If you had asked me what virtual memory was severalYears ago, I 'd have given you some hand-wave explanation about makingIt appear as if your computerHas much more RAM than it actually does. Which is only sort of correctAnd fairly imprecise. Sometimes people will get stuck on the ideaWriting dataTo the file system, which is not quite correct either. First,A thought experiment about a system with no virtual memory. Suppose youHave an EXE running, it ha

in the opened table (open tables), plus some additional overhead.MySQL 5.5 (and version 5.1 with plug-ins) allows you to specify a block size of 8 KB or 4 KB. MySQL 5.5 can have multiple buffer pools, because each cache pool has one mutex, so setting up multiple pools can alleviate some mutex bottlenecks.More InnoDB tuning informationanother way to calculate cache size Set the primary cache to the minimum value; This can be specified if there are many other applications running on the same mach

that can still store data after the system is restarted or shut down. Flash stores IOS in use. In fact, if the Flash capacity is large enough, you can even store multiple operation systems, which is very useful for IOS upgrades. If you do not know whether the new version of IOS is stable, you can retain the old version of IOS after the upgrade. When a problem occurs, you can quickly return it to the old version of the operating system to avoid long-term network faults. 3. non-volatile