android - Save sqlite db in external memory -

i want save sqlite db file in external memory.

i written code save in internal memory below.but want extract "xxx.db" in run time , check whether db fields saved or not.

manifest.xml

<uses-permission android:name="android.permission.write_external_storage" /> <uses-permission android:name="android.permission.read_external_storage" /> <uses-permission android:name="android.permission.internet" /> <uses-permission android:name="android.permission.access_network_state" /> 

and dbhelper.java

private static string db_path           =   "data/data/com.example.myapp/databases/"; private static final string database_table  =   "mydb"; private static final int database_version   =    1; private static final string database_name   =   "mydb.db";  public void createdatabase() throws ioexception{          boolean doesdbexist = checkdatabase();          if(doesdbexist){             toast.maketext(ourcontext, "db created", toast.length_short).show();         }else{             this.getreadabledatabase();             try{                 copydatabase();             }catch(exception e){                 log.d("dberror", "copy db error");             }             toast.maketext(ourcontext, "new db created.", toast.length_short).show();         }     }      private void copydatabase() throws ioexception{             //open local db input stream             inputstream myinput     =   ourcontext.getassets().open(database_name);              // path created empty db             string outfilename      =   db_path + database_name;              //open empty db output stream             outputstream myoutput   =   new fileoutputstream(outfilename);              //transfer bytes inputfile outputfile             byte buffer[]           =   new byte[1024];              int len;              while ((len = myinput.read(buffer))>0) {                  myoutput.write(buffer, 0, len);              }             // close streams             myoutput.flush();             myoutput.close();             myinput.close();          } 

please me , suggest me required changes.

here's how can save database sd card:

private void backup() throws ioexception {         file currentfile = new file(environment.getdatadirectory(), "//data//" + activity.getpackagename() + "//databases//" + database_name);          file backupfile = new file(environment.getexternalstoragedirectory(), databasehandler.database_name);         backupfile.delete();         backupfile.createnewfile();          fileinputstream fis = new fileinputstream(currentfile);         fileoutputstream fos = new fileoutputstream(backupfile);          bytestreams.copy(fis, fos);          fis.close();         fos.close();     } 

note used bytestreams guava.