retrieve files from sd card

Add a file directly to the SD card of the simulator in ddms. If an error occurs, the following error occurs:Failed to push xxxxx.txt on emulator-: Read-Only file system error, because your sdcard permission is insufficient and you need to create an sdcard directly. I. First create an sdcard. The name of the sdcard I created is sdcard. IMG (the name is random and ends with the name of the IMG extension)

: Describes what the query results are sorted by. Above is the meaning of each parameter, it returns the query results a cursor, the cursor is equivalent to the database query result, usage and it is similar. --------------------------------------------------------------------------------------------------------------- ---- Add the code as follows: Contentvalues values = new Contentvalues (); Values.put (mediastore.audio.playlists.members.play_order,0); Resolver.insert (_uri, values); This inser

----Main.java publicclassmainextendsactivity{privatetextviewtextview;private buttonbutton;privatelistviewlistview;publicfilecurrentparentfile;public file[]currentfiles;publicstaticstringsdcarddir;static{try{// The path of the SD card Sdcarddir=environment.getexternalstoragedirectory (). Getcanonicalpath ();} catch (ioexceptione) {e.printstacktrace ();}} @Overrideprotected voidoncreate (bundlesavedinstancest

1. In standby mode, click "Application". 2. Click on "My Files". 3. Click "Picture". 4. Select the path of the picture, here to select "Camera" as an example, and will need to back up the picture hook. 5. Click on the "Three Fonts" menu icon in the upper right corner of the screen and select "Copy". 6. Select "SD memory Card", then click "Sti

false;}/*** Delete Log File */public static void deleteLogFile () {File file = new File (filePath); if (file. exists () {file. delete ();}}}2. writing data to a file asynchronously does not affect user experience, and there cannot be any latency due to log writing. (In this experiment, if the data written to a file is small at a time, it will not be too slow even if the data is synchronized) to achieve this goal, we first consider multithreading. Another thread is responsible for writing logs t

two different ways:First, the window interface operation1. Open DDMS page2. Open the File Explorer page, if not, at window---Show View-->file Explorer3, generally in mnt--sdcard4. In SDcard, click on the destination folder where you want to put the file, such as mp3 folder5, click on the folder, on the right side of the File Explorer page, there are two icons, one is pull, one is Push,pull will be mp3 inside the file pulled out, push is the outside, such as the

+ "/" +filename,dir+filename+ "/");}Continue}File OutFile = new file (Mworkingpath, fileName);if (Outfile.exists ())Outfile.delete ();InputStream in =null;if (0!=assetdir.length ())in = Getassets (). Open (assetdir+ "/" +filename);Elsein = Getassets (). open (FileName);OutputStream out = new FileOutputStream (outFile);Transfer bytes frombyte[] buf = new byte[1024];int Len;while (len = In.read (buf)) > 0){Out.write (buf, 0, Len);}In.close ();Out.close ();}catch (FileNotFoundException e){E.printst

+ "/" +filename,dir+filename+ "/");}Continue}File OutFile = new file (Mworkingpath, fileName);if (Outfile.exists ())Outfile.delete ();InputStream in =null;if (0!=assetdir.length ())in = Getassets (). Open (assetdir+ "/" +filename);Elsein = Getassets (). open (FileName);OutputStream out = new FileOutputStream (outFile); Business Account RecoveryTransfer bytes frombyte[] buf = new byte[1024];int Len;while (len = In.read (buf)) > 0){Out.write (buf, 0, Len);}In.close ();Out.close ();}catch (FileNotF

The Android program function Copies files in the assets folder to the SD card (including subfolders) of the mobile phone and androidassets. Recently, the function is to copy all files (including sub-files) in the asset folder to the specified directory. The method used is no

When the Android system is started, it will automatically detect the SD card files and collect music files to generate a database file. We only need to access the information in the database table to obtain the required File Code as follows: Obtain the cursor object to access the media resources in the cursor. If (cur

Copy files from the Android Project Assets folder to the SD card

Android files saved to the app and SD card

. Propertyconfigurator. getconfigurator (this). Configure (); 4. Put the microlog. properties file in the assets folder. Note: The assets folder is the same as the res folder. Then change the microlog. properties file to the following: Microlog. Level = debugMicrolog. appender = logcatappender; fileappenderMicrolog. formatter = patternformatterMicrolog. formatter. patternformatter. pattern = % C [% P] % m % t 5. Write log records Logger. debug ("My debug "); 6. Add

= "error") {toast. maketext (mainactivity. this, "reading failed! ", Toast. length_short). Show (); show. settext (" reading failed! "); Return;} Show. settext (" read successful: "+ Str); toast. maketext (mainactivity. This," read successful! ", Toast. length_short ). show () ;}}); write. setonclicklistener (New onclicklistener () {public void onclick (view v) {string STR = show. gettext (). tostring (); If (writesdcard (STR) = true) {toast. maketext (mainactivity. this, "Write successful! ",

The way to back up a multimedia file is as follows: "Picture" for example.1. In standby mode, click "Application". 2. Click on "My Files". 3. Click "Picture". 4. Select the path of the picture, here to select "Camera" as an example, and will need to back up the picture hook. 5. Click on the "Three Fonts" menu icon in the upper right corner and select "Copy". 6. Select "Extsdcard" and click "S

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

between sdio and SD card specifications is the addition of low-speed standards. On the sdio card, only the SPI and one-bit SD transmission modes are required. The target application of low-speed cards supports low-speed IO with minimal hardware overhead. 1. 4. What is MCI? MCI: MCI is short for the multimedi

Android --- 36 --- read sd card content, android --- 36 --- sd1. Call Environment. getExternalStorageState () to determine whether the SD card is inserted on the mobile phone and the application has the permission to read and write the SD card.Environment. getExternalStorage

Android sd card cannot immediately display the file to be written after the file is written. Solution: Android sd Every time a file is written to the SD card through an output stream, the file is connected to the computer, and a mobile disk is simulated using MTP. Opening t

Android sd card cannot immediately display the file to be written after the file is written. Solution: Android sd Every time a file is written to the SD card through an output stream, the file is connected to the computer, and a mobile disk is simulated using MTP. Opening t