SDcard data read and write in Android

Import Java.io.filenotfoundexception;import java.io.fileoutputstream;import java.io.ioexception;import Android. R.integer;import Android.content.context;import Android.os.environment;public class FileService {private Context cont    Ext    Public Fileservice (Context context) {This.context = context; Public Fileservice () {} public String Getfilefromsdcard (string fileName) {FileInputStream InputStream        = NULL;        Cached streams, and disk-independent, do not need to close bytearrayoutputstream outputstream = new Bytearrayoutputstream ();        File File = new file (Environment.getexternalstoragedirectory (), fileName);                if (Environment.MEDIA_MOUNTED.equals (environment. Getexternalstoragestate ())) {try {                InputStream = new FileInputStream (file);                int len = 0;                byte[] data = new byte[1024]; while (len = inputstream.read (data))! =-1) {outputstream.write (data, 0, Len); }} catch (FileNotFoundException e) {//TODO auto-generated catch block e.prints            Tacktrace ();            } catch (IOException e) {//TODO auto-generated catch block E.printstacktrace (); } finally {if (InputStream! = null) {try {inputstream.close (                    ); } catch (IOException e) {//TODO auto-generated catch block E.printstacktra                    CE ();    }}}} return new String (Outputstream.tobytearray ());    }/** * @param filename * The name of the file * @param content * File contents * @return */        public boolean Savecontenttosdcard (string fileName, String content) {Boolean flag = false;        FileOutputStream fileoutputstream = null; Get the path to the sdcard card file File = new file (EnviRonment.getexternalstoragedirectory (), fileName);            Determine if the SDcard card is available if (Environment.MEDIA_MOUNTED.equals (environment. Getexternalstoragestate ())) {                try {fileoutputstream = new FileOutputStream (file);                Fileoutputstream.write (Content.getbytes ());            Flag = true;            } catch (FileNotFoundException e) {//TODO auto-generated catch block E.printstacktrace ();             } catch (IOException e) {//TODO auto-generated catch block E.printstacktrace (); } finally {if (FileOutputStream! = null) {try {fil                    Eoutputstream.close (); } catch (IOException e) {//TODO auto-generated catch block E.printstacktra                    CE ();    }}}} return flag; }}

Manifest file

<uses-permission android:name= "Android.permission.WRITE_EXTERNAL_STORAGE"/>