I recently made a music player and needed to add MP3 files to the SD card. The following describes how to use sdcard.
The android simulator allows us to use the disk image in FAT32 format as the SD card simulation:
All of the following operations are performed in Windows1. C
Debugging related to SD card is often encountered in andorid development, such as MP3 files and image files.
When developing a simulator, you can simulate an SD card through a hard disk. The specific method is:
1. Create an SD car
= new file ("/sdcard/himi/Save. himi"); // create a file directory path
FS = new fileinputstream (PATH); input path
Third:Modify the write location(Note 2)
Fos = This. openfileoutput ("Save. himi", mode_private); this is the default path and needs to be modified,
Note: If the modification is made, you must modify the finally statement accordingly;
NOTE: If it is a system path, Android will create a file by default if this file is not available! But
Public Longgetsdallsize () {3 //get SD card file path4File Path =environment.getexternalstoragedirectory ();5StatFs SF =NewStatFs (Path.getpath ());6 //gets the size of a single data block (Byte)7 LongBlockSize =Sf.getblocksizelong ();8 //get the number of all data blocks9 LongAllblocks =Sf.getblockcountlong ();Ten //return
can store more data.
2. Store database files in the SD card!
What is sqlitedatabase?
An instance of sqlitedatabase represents an SQLite database. Through some methods of the sqlitedatabase instance, we can execute SQL statements to add, delete, query, and modify data databases. Note that the database is private to an application, and the database name is unique in an application.
What is sqliteopenhelpe
command is as follows: emulator-sdcard E: \ sdcard. img
Run as --> RUN configurations --> target --> aditional emulator command line options:-sdcard
3. Import/Export files to the SD card
In cmd: ADB push
This command will test the test.txt file under the current directory to the sdcard, and the file name will not change. The first test.txt is the path of the local file, and sdcard/test.txt is the
Recently, I am working on an image upload function. I need to provide the path for uploading images to the SD card. I have read some examples on the Internet. The code is very simple after debugging. The layout file is as follows:
Copy codeThe Code is as follows: Android: layout_width = "fill_parent"
Android: layout_he
This paper illustrates the existence of the SD card and the implementation of capacity query using the Android programming method. Share to everyone for your reference, specific as follows:
1. To determine whether the existence of SD card returns TRUE indicates existence
The reading and writing of SD cards is the most common operation in the development of Android applications. The following describes the SD card read and write operation mode:
1. Get the root directory of SD card
Copy Cod
I recently made a music player and needed to add mp3 files to the SD card. The following describes how to use sdcard.The Android simulator allows us to use the disk image in fat32 format as the SD card simulation:All of the following operations are performed in windows1. Cre
Open the Eclipse.exe main program of the desktop and come directly to his homepage.
Locate the window----Show view----Other button on the top of the tool
After opening, we click on Android to expand him.
After you expand, double-click the File Explorer tab below
The File Explorer tab will appear below
In the bottom we double click on the mnt---sdcard tab
With the SDcard tab selected, we click th
shell command to access the device and view the directory. The directory of the sdcard contains the file pushed in. The terminal is as follows:
Root @ xxx:/home/XXX/android_install/android-sdk-linux_x86/platform-tools # ADB Shell### LsAcctCacheConfigDDataDefault. PropDevEtcInitInit. Goldfish. RCInit. RCMNTProcRootSbinSdcardSysSystemUeventd. Goldfish. RCUeventd. RCVendor# Cd sdcard# Ls111.mp4AndroidDcimLos
The android simulator allows us to use the disk image in FAT32 format as the SD card simulation:All of the following operations are performed in Windows
First, run cmd to go to the command line interface (you need to set the tools in the directory where your android SDK is located to the environment variable path in
A picture upload function needs to provide upload pictures in the SD card path, summed up some of the online columns, modified a bit, the code is very simple, interested friends can refer to ha, I hope to help you
Recently in doing a picture upload function, you need to provide upload pictures in the SD card path, on
Android uses Log4j to write logs to the SD card and dynamically modify the name of the output file1. Log4j simple use 1. Download log4j. jar http://logging.apache.org/log4j/2.x/2. Create Java code
public class Loggers { public static Logger logger = Logger. getLogger(Loggers. class); public static void init() { try { PatternLayo
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