how to access sd card on android phone

1. Get the directory of the storage device:/sdcard (generally) Sdpath = environment. getexternalstoragedirectory () + "/";2. Determine whether the folder on the SD card exists: Use the exists () method of the file object./*** Determine whether a file already exists;*/Public Boolean checkfileexists (string filepath ){File file = new file (sdpath + filepath );Return file. exists ();}3. Create a directory on t

Mounted SD card for Android simulator in Linux 1. Create an SD card: ~ /Gingerbread $ mksdcard-l mysdcard 256 m mysdcard. img Create an SD card image file in the current directory na

RAM: Run-time memory. Equivalent to the memory storage of the PC, used to store various objects and variable constants when the application runs, the main role is to improve the speed of operation. Is the only memory that the data clears after a power outage.Body Memory: Equivalent to PC hard drive. It consists of three areas: ROM, internal memory and external memory.ROM: Read-only memory. This section of the file can only be read, non-erasable, such as the PC C drive below some of the system fi

1. Use the mksdcard command to create a 128 m sd card image named sdcard. IMG (m must be capitalized.Mksdcard 128 M sdcard. img2. Copy sdcard. IMG to D: \ projects2 and set the startup parameters in the run configuration dialog box in eclipse.-Sdcard D: \ projects2 \ sdcard. imgIn this way, the SD card is available.3.

Android-read and write data to the SD card // Write data to the SD card private void writeSDcard (String str) {try {// determine whether the SD card if (Environment. getExternalStorageS

", Toast.length_short). Show (); } } Public voidonclick10 (view view) {if(Environment.getexternalstoragestate (). Equals (environment.media_mounted)) {//1. Get the content you want to store//String content = Et_5.gettext (). toString (); //2. Get the external storage directory with package name--only to the root directoryString Sdpath =environment.getexternalstoragedirectory (). GetAbsolutePath (); //Toast.maketext (activitydata.this, "sdpath=" +sdpath, Toast.length_long). Show (); //the

I. Get permission to read the SD card Second, find the SD card directory/** * Environment.getexternalstoragedirectory () obtained: ", Mnt/sdcard" that found the root directory of the SD card */ private String path= Env

In the previous section, we learned how to use file for Android data storage. However, such data is stored in applications. Therefore, the size of such stored files must be limited, sometimes we need to store larger files, such as movies, which uses our sdsard memory card. Android also provides sdcard related operations. Environment class can implement this funct

() + "/image.jpg"); bitmap newbitmap = imagetools. zoombitmap (bitmap, bitmap. getwidth ()/scale, bitmap. getheight ()/scale); // because the bitmap memory usage is large, memory needs to be recycled here; otherwise, an out of Memory exception bitmap will be reported. recycle (); // display the processed image on the interface and save it to the local iv_image.setimagebitmap (newbitmap); imagetools. savephototosdcard (newbitmap, environment. getexternalstoragedirectory (). getabsolutepath (), S

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

Transfer the Android Market cache to the SD card sizeProgram! A previous tutorialHow to clear System junk in Android G1 Now I have a better way to save memory, that is, to transfer the cache in the market to the SD card, so that

Sometimes using the Android simulator to simulate SD card related operations, in Eclipse can directly view the SD card directory;First, the new simulator to create the SD card, the size

issdcardavaiable () {if (Environment.getexternalstoragestate (). Equals (environment.media_mounted)) {return true;}return false;}/*** Get the journal root directory* @return*/Public String Getlogrootpath () {String Sdcardpath = Getsdpath ();StringBuffer sb = new StringBuffer ();Sb.append (Sdcardpath). Append (File.separator). Append ("Zgzh");Sb.append (File.separator). Append ("Logs");String root = sb.tostring ();File Sdfile = new file (sb.tostring ());if (!sdfile.exists () | | | Sdfile.getabso

When the Android Application creates a database, it is established in the system by default/data/'application package name '/ Sometimes we need to build it in the SD card. Advantages of SD card: 1. After the system restores the factory settings, reinstall the application. Da

There are two ways to implement a photo in Android, one is to call the system's own camera and then use the photo data it returns. Another one is to use the camera class and other related classes to achieve the camera function, this method of the system is relatively high, dyeing is also more complex, the general common application just use the first one can. start the camera code with intent： Copy Code code as follows: Intent Intent

files like your phone's own file system browser.Whether it's an internal SD card or an external SD card, it's a phone's external storage, and the phone's internal storage and external storage share the same device.Internal Storage Path:All apps installed to the phone will generate a package name folder in the Data/dat

Use SD card in Google Android SimulatorFrom the perspective of this document, the android simulator allows us to use a disk image in the FAT32 format as a simulation of the SD card. Today, I tried to record the process and share i

public static string Getsdpath (context context) { string sd = null; StorageManager StorageManager = (storagemanager) context . Getsystemservice (context.storage_service); storagevolume[] volumes = Storagemanager.getvolumelist (); for (int i = 0; i volumes[i].getdescription (context). Contains ("SD")) { SD