how to store Image as blob in Sqlite how to retrieve it

Question

I want to store an image from url  into a sqlite database   For that I use    db   new DataBase getApplicationContext     URL url   new URL  http   sree cc wp-content uploads schogini team png    URLConnection ucon   url openConnection    InputStream is   ucon getInputStream    BufferedInputStream bis   new BufferedInputStream is 128   ByteArrayBuffer barb  new ByteArrayBuffer 128    int current   0  while   current   bis read       -1        barb append  byte  current      ContentValues filedata  new ContentValues     filedata put DataBase IMG SRC barb toByteArray      db insert DataBase Table Img  null  filedata     In the Insert     public void insert String tableImg  Object object          ContentValues dataToInsert           TODO Auto-generated method stub     String sql    INSERT INTO   tableImg      ID     IMG SRC                     VALUES     1       dataToInsert           db execSQL sql       For the retrieval of image   Cursor cursor   db selectDataToShow DataBase Table Img  DataBase IMG SRC    byte   imageByteArray cursor getBlob cursor getColumnIndex DataBase IMG SRC          cursor close     ByteArrayInputStream imageStream   new ByteArrayInputStream imageByteArray   Bitmap theImage   BitmapFactory decodeStream imageStream    System out println   gt  gt  gt  gt  gt  gt  gt  gt  gt  gt  gt  gt  gt  gt  gt  gt  gt  gt  gt  gt  gt  gt    theImage     So here I got null   And in my database the value of image stored as  Image  B 43e5ac48

User · Answer

you may also want to encode and decode to from base64      function uncompress str String  ByteArray               import mx utils Base64Decoder              var dec Base64Decoder   new Base64Decoder                dec decode str               var newByteArr ByteArray dec toByteArray                        return newByteArr                     Compress a ByteArray into a Base64 String      function compress bytes ByteArray  String            import mx utils Base64Decoder    Transform String in a ByteArray          import mx utils Base64Encoder    Transform ByteArray in a readable string          var enc Base64Encoder   new Base64Encoder                enc encodeBytes bytes           return enc drain   split   n   join

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for a ionic project        var imgURI                 var imgBBDD              sqllite for save into      function takepicture                     var options                         quality   75                      destinationType   Camera DestinationType DATA URL                      sourceType   Camera PictureSourceType CAMERA                      allowEdit   true                      encodingType  Camera EncodingType JPEG                      targetWidth  300                      targetHeight  300                      popoverOptions  CameraPopoverOptions                      saveToPhotoAlbum  false                                      cordovaCamera getPicture options  then function imageData                        imgURI    data image jpeg base64     imageData                      imgBBDD   imageData                     function err                           An error occured  Show a message to the user                                      And now we put imgBBDD into SqlLite         function saveImage   function  theId  theimage         var insertQuery    INSERT INTO images id  image  VALUES   theId       theimage             console log                   DDBB SelectQuery insertQuery                       then  function result                            console log  Image saved                                                catch  function err                                                  deferred resolve err                           return cb err                                    A server side  php              request   file get contents  php   input       gets the raw data          dades   json decode  request true      true for return as array       if  dades                    array   array                 array  error     -1               array  descError      Error when get the file                array  logError                     echo json encode  array               exit                      send the image again to the client         header  Content-Type  image jpeg            echo

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byte   byteArray   rs getBytes  columnname       Bitmap bm   BitmapFactory decodeByteArray byteArray  0  byteArray length

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Here the code i used for my app  This code will take a image from url and convert is to a byte array  byte   logoImage   getLogoImage IMAGEURL    private byte   getLogoImage String url        try                URL imageUrl   new URL url                URLConnection ucon   imageUrl openConnection                  InputStream is   ucon getInputStream                 BufferedInputStream bis   new BufferedInputStream is                 ByteArrayBuffer baf   new ByteArrayBuffer 500                int current   0               while   current   bis read       -1                      baf append  byte  current                                return baf toByteArray           catch  Exception e              Log d  ImageManager    Error      e toString                 return null      To save the image to db i used this code    public void insertUser            SQLiteDatabase db   dbHelper getWritableDatabase            String delSql    DELETE FROM ACCOUNTS           SQLiteStatement delStmt   db compileStatement delSql           delStmt execute             String sql    INSERT INTO ACCOUNTS  account id account name account image  VALUES                  SQLiteStatement insertStmt   db compileStatement sql           insertStmt clearBindings            insertStmt bindString 1  Integer toString this accId            insertStmt bindString 2 this accName           insertStmt bindBlob 3  this accImage           insertStmt executeInsert            db close        To retrieve the image back this is code i used   public Account getCurrentAccount         SQLiteDatabase db   dbHelper getWritableDatabase        String sql    SELECT   FROM ACCOUNTS       Cursor cursor   db rawQuery sql  new String             if cursor moveToFirst             this accId    cursor getInt 0           this accName   cursor getString 1           this accImage   cursor getBlob 2             if  cursor    null  amp  amp   cursor isClosed              cursor close              db close        if cursor getCount      0           return null        else           return this            Finally to load this image to a imageview  logoImage setImageBitmap BitmapFactory decodeByteArray  currentAccount accImage           0 currentAccount accImage length

User · Answer

In insert    public void insert String tableImg  Object object          ContentValues dataToInsert        db insert tablename  null  dataToInsert       Hope it helps you

User · Answer

in the DBAdaper i e Data Base helper class declare the table like this   private static final String USERDETAILS       create table userdetails usersno integer primary key autoincrement userid text not null  username text not null password text not null photo BLOB visibility text not null       insert the values like this   first convert the images as byte    ByteArrayOutputStream baos   new ByteArrayOutputStream      Bitmap bitmap     BitmapDrawable getResources   getDrawable R drawable common   getBitmap    bitmap compress Bitmap CompressFormat PNG  100  baos      byte   photo   baos toByteArray     db insertUserDetails value1 value2  value3  photo value2     in DEAdaper class   public long insertUserDetails String uname String userid  String pass  byte   photo String visibility         ContentValues initialValues   new ContentValues        initialValues put  username   uname       initialValues put  userid  userid       initialValues put  password   pass       initialValues put  photo  photo       initialValues put  visibility  visibility       return db insert  userdetails   null  initialValues       retrieve the image as follows  Cursor cur your query  while cur moveToNext           byte   photo cur getBlob index of blob cloumn       convert the byte   into image  ByteArrayInputStream imageStream   new ByteArrayInputStream photo   Bitmap theImage  BitmapFactory decodeStream imageStream     I think this content may solve your problem

[android] how to store Image as blob in Sqlite & how to retrieve it?

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