android move to sd card

When you use MediaPlayer to play a local Mp3 file , you need to be aware of the problem with access paths and access permissions .1. Access path:/storage/emulated/0 This path is the root path of the phone, you can download the es file browser software to view the current playing MP3 specific path, through Environment.getexternalstoragedirectory (). GetPath () gets /storage/emulated/0 This sdcard path This in the organization void Android.media.MediaPlayer.setDataSource (String path) throws

(); } 2. Get the right: 3. Judge the state of SDcard (SDcard may be write-protected or not inserted sdcard) Save String en=environment.getexternalstoragestate () to SDcard; Gets the SDcard state if SDcard is plugged into the phone and is not write-protected state if (En.equals (environment.media_mounted)) { try { Service.savetosdcard (filename, content); Toast.maketext (Getapplicationcontext (), "Save Success", 1). Show (); catch (Exception e) { toas

] = = '. ') | |(Name_len = = 2 de_src->d_name[0] = = '. ' de_src->d_name[1] = = '. ')) {Continue}else {src dir path Append the folder ' s D_namesprintf (Src_file_path, "%s/%s", Src_dir_path, De_src->d_name);printf ("src dir path:%s\n", Src_file_path);Des dir path Append the folder ' s D_namesprintf (Des_file_path, "%s/%s", Des_dir_path, De_src->d_name);printf ("Des dir path:%s\n", Des_file_path);printf ("---entry sub dir to restore\n");ret = Restore_dir_file (Des_file_path, Src_file_path);prin

); Intentfilter.addaction (INTENT.ACTION_MEDIA_NOFS); Intentfilter.addaction (Intent.action_media_button); Intentfilter.addaction (Intent.action_media_scanner_scan_file); Intentfilter.adddatascheme ("file"); Registerreceiver (Broadcastrec, intentfilter);} Private final Broadcastreceiver Broadcastrec = new Broadcastreceiver () {@Override public void onreceive (Context Context, Intent Intent) {String action = intent.getaction (); LOG.D ("mediaaction", action); if (Action.equals

each time through the output stream to the SD card to write files, connected to the computer, using MTP to simulate a mobile disk, open the disk but there is no such a file, and the way to see through the ADB, the cause of this phenomenon is that after each write, the MTP database is not updated, Because the update of the MTP database requires a large price ratio, so only in the restart, mount and the user

each time through the output stream to the SD card to write files, connected to the computer, using MTP to simulate a mobile disk, open the disk but there is no such a file, and the way to see through the ADB, the cause of this phenomenon is that after each write, the MTP database is not updated, Because the update of the MTP database requires a large price ratio, so only in the restart, mount and the user

Each time through the output stream to the SD card to write files, connected to the computer, using MTP to simulate a mobile disk, open the disk but there is no such a file, and the way to see through the ADB, the cause of this phenomenon is that after each write, the MTP database is not updated, Because the update of the MTP database requires a large price ratio, so only in the restart, mount and the user

= Environment.getexternalstoragestate ();if (State.equals (environment.media_mounted)) {File root = Environment.getexternalstoragedirectory ();File TargetDir = new file (Root,super.getpackagename ());if (! Targetdir.exists ()) {Targetdir.mkdir ();}try {Oos = new ObjectOutputStream (new FileOutputStream (New File (TargetDir, "yxl.txt"));Student Student = new Student ("Xiaoming", 18);Oos.writeobject (student);Toast.maketext (Getapplication (), "Write succeeded", Toast.length_short). Show ();} cat

When we do Android development, we often have this experience, because the customer's device models are different, resulting in a variety of problems, but for developers, because there is no log log files, it is not easy to locate the exact location of the problem. So we need a tool that can write the program log to the SD card file, like the Web log4j. At this t

The first few days encountered a problem: Save the image to the SD card in the Android development app, and the user searched in the gallery, similar to the form of the cache. The first idea is to change the suffix name, for example, to save a picture as Image1.txt, so save of course no problem, but in the application of reading in the not, and later did not stud

1. Save to SD card:Get the status of SDcard:Environment.getextemalstoragestate ()Environment.media_mounted mobile phone is equipped with sdcard and can read and writeGet the directory of SDcard: Environment.getextemalstoragedirectory ()//=============================================File Savefile=new file ("/sdcard/zhzhg.txt");Or: File Sdcarddir=new file ("/sdcard");//get SD

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

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)

/*** Method of obtaining SD information*/ Private voidGetsd () {//TODO auto-generated Method StubFile path=environment.getexternalstoragedirectory (); StatFs Stat=NewStatFs (Path.getpath ()); LongBlocksize=stat.getblocksize (); Longtotalblacks=Stat.getblockcount (); Longavailableblocks=stat.getavailableblocks (); Longtotalsize=blocksize*totalblacks; Longavailsize=availableblocks*blockSize; String Totalstr=formatter.formatfilesize (mainactivity. Thi

1, because the simulator must be installed under the system disk, so the default SD card file is also stored in the C disk, then the expansion of capacity will inevitably lead to the reduction of C disk space, which is usually intolerable to users, so you also need to transfer it to the hard disk of other more free partitions, The following functions can be used to facilitate the implementation of the Force

Directly on the code:Package Com.example.callstatus;import Java.io.file;import Java.io.filewriter;import java.io.ioexception;import Java.io.printwriter;import Java.io.stringwriter;import Java.net.unknownhostexception;import Java.text.simpledateformat;import Java.util.date;import Android.annotation.suppresslint;import Android.os.environment;import android.util.log;/** * Android Development Debug Log Tool class [support save to

(tag); Sb.append (": "); Sb.append (msg); Sb.append ("\ n"); Randomaccessfile RAF=NULL; Try{RAF=NewRandomaccessfile (Mlogfile, "RW"); Raf.seek (Mlogfile.length ()); Raf.write (Sb.tostring (). GetBytes ("UTF-8")); } Catch(unsupportedencodingexception e) {e.printstacktrace (); } Catch(IOException e) {e.printstacktrace (); } finally { if(RAF! =NULL) { Try{raf.close (); }