size

问题 File table contains - File_Id and File_data(BLOB) how can I know the size of the binary file stored in File_data column. length function gives the length of file but how to know the size in KB. 回答1: This gives a number in bytes, devide it by 1024 to get size in KB. Select sum(BIGINT(length(blob_column))) from table; 回答2: BLOB Length is not quite the same as size . You first need to answer NO to all of these questions for it to be the file size: Is the BLOB column declared as COMPACT? Is the

问题 I'm using MySQL PDO in PHP to retrieve very long string (about 1-5mb) from the database. When tested on my local machine, everything worked fine. However, on my live server, when executing a select statement, the maximum string size returned is 1048576 bytes, which is exactly 1MB. Hence, since the code is the same, this must be something in the PHP or MySQL settings. I have the follow: php.ini post_max_size = 20M my.cnf max_allowed_packet = 20M So I assume I'm not setting the correct

问题 How can I get the available height of the screen in Android? I need to the height minus the status bar / menu bar or any other decorations that might be on screen and I need it to work for all devices. Also, I need to know this in the onCreate function. I know this question has been asked before but I have already tried their solutions and none of them work. Here are some of the things I have tried: This does not take into account the status bar / menu bar: Display display = getWindowManager(

问题 Please tell me, why my simple application cannot mmap a small size of memory? And, why such a specific boundary - 257UL? // #define MAP_SIZE 256UL or below - fail // #define MAP_SIZE 257UL - ok #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <errno.h> #include <signal.h> #include <fcntl.h> #include <ctype.h> #include <termios.h> #include <sys/types.h> #include <sys/mman.h> #define FATAL do { fprintf(stderr, "Error at line %d, file %s (%d) [%s]\n", \ _

问题 I need to process each frame of captured video frame, although AVCaptureDevice.formats provided so many different dimension of frame sizes, it seems AVCaptureSession only support those frame sizes defined in presets. I've also tried to set AVCaptureDevice.activeFormat before AVCaptureInputDevice or after, no matter what setting I set, if I set AVCaptureSessionPresetHigh in AVCaptureSession , it always give me a frame of 1280x720. Similar , If i set AVCaptureSessionPreset 640x480, then I can

问题 I want to store contents of email body into MySql. What would the correct type&size of the field be? Can varchar() provide enough storage size? Is there a limitation in the email body's length? Thanks in advance. 回答1: You will need to use blob or text types. There is no limit on the length of an email body. 回答2: "A BLOB is a binary large object that can hold a variable amount of data" http://dev.mysql.com/doc/refman/5.5/en/blob.html 来源： https://stackoverflow.com/questions/6766449/mysql-field

问题 I would like to increase the android virtual device map heap size with Eclipse. I tried to set the Max VM application heap size to 128 in the Eclipse AVD Manager, but it does not work, the line Runtime.getRuntime().maxMemory()/(1024*1024); always returns 48, no matter the set heap size. Device ram size is set to 512. Selected target is Android 4.1.2 (API Level 16). Moreover, I have set android:largeHeap="true" in the manifest file. Is there a limit to max heap size (is 128MiB to much ?), or

问题 I created a menuView.xml layout to be in all of the layouts of my activity. This layout has one column on each border and a title bar like this: ComposeView http://img845.imageshack.us/img845/2121/d6zp.png I insert this layout in the other layouts this way: <!-- Show menu --> <com.example.MenuView android:layout_width="wrap_content" android:layout_height="wrap_content" /> But if one of the layouts has full screen view, part of this view gets covered by the MenuView, so... How could I tell to

问题 I have a very small game with just 2 scenes and least number of assets.3 plugins have been used like Unity IAP, Googleplaygames plugin and google admob plugin. Thats all there is. Yet the build size is way too high. Over 600MB(over 700MB in archive)!! Below I have posted the build report in the editor log for both iOS and android. As you can see no specific category is taking up much space but yet the complete size is large for both andorid and ios. iOS size way more than android as well.

问题 How can I make my button's size to increase slightly when it is pressed and decrease again when it is released? This is for highlighting the pressed button, by using size in addition to a different color. Regards, Kiki 回答1: Make your Button a field, and modify its size in the OnTouchListener associated with it. Using an OnTouchListener you can listen for different MotionEvents , such as ACTION_DOWN and ACTION_UP . 回答2: button.setOnTouchListener(new View.OnTouchListener() { @Override public