how to restore deleted files from sd card on android

Android-create a database to the SD cardSQLite comes with SQLiteOpenHelper, while SQLiteOpenHelper stores the database to/data/package name/databasas, in this case, the SQLite database cannot be seen on a mobile phone without a root user. So, in another way, store the database SQLite on the SD card. The getWritableData

Android database SQLite writes SD card, androidsqlite If the mobile phone does not have a root user, the database files cannot be viewed and debugging is not convenient. The best way is to write the database into the SD card. The

In the LAN, the implementation from the Android client to the mobile phone SD card files uploaded to the PC server side, and saved in the PC hard drive under the specified folder. At the same time, the PC-side hard disk file directory and the file description information stored in the MySQL database.1, the client key 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

(); //the parameter represents a subdirectory of a different file type if it is not passed null gets the directory with the package name under the root directoryString Sdpath = Getexternalfilesdir (NULL). GetAbsolutePath (); //Toast.maketext (activitydata.this, "sdpath=" +sdpath, Toast.length_long). Show (); //3. Constructing the input streamSdpath + = "/" +FILENAME; Try{FileInputStream fis=NewFileInputStream (Sdpath); byte[] B =New byte[1024]; inti = 0; StringBuilder SBR=NewStringBuilder ();

/DEMO.DB"; Database name public static FINAL String table_name = "mytag";//datasheet name, a database can contain more than one datasheet, similar to the Sheet1,sheet2 in Excel // Mydbhelper's constructor, we are concerned with the name database_name and version versions public Mydbhelper { Super database_name, NULL, VERSION); Because if just a separate file name, the last created database file is stored in the phone's internal memory card (not

This article is translated from https://www.securecoding.cert.org/confluence/display/java/DRD00-J.+Do+not+store+sensitive+information+on+ External+storage+%28sd+card%29+unless+encrypted+first, there are additional deletions.Android offers several options for saving persistent application data, one of which is external storage (/sdcard,/mnt/sdcard). The external storage contains a miniature or standard-sized SD