Develop Reference

How can I store images and strings in the same database table and retrieve them

I have a form that accepts texts and images and I want to store the data in the same database table. Below is the declaration for my record but they are all strings so how do i convert the images to strings to add to this list:
site_info_record.createSiteInfoRecord(sql_sysaid_id, sql_site_id, sql_link_id, sql_customer_name, sql_site_contact,
sql_task_type, sql_address, sql_region, sql_phone, sql_fax, sql_mobile, sql_email,
sql_landlord_name, sql_rent_status, sql_loc_cords, sql_power_status, sql_voltage, sql_aircon, sql_server_room,
sql_location_idu, sql_earthing, sql_distance_idu, sql_security, sql_ducts, sql_unit, sql_install_type,
sql_isp, sql_radio_type, sql_isp_type, sql_isp_name, sql_snr_rx, sql_bs, sql_remark);
And when i want to retrieve, its also in string format:
public String getInfoData() {
String[] columns = new String[]{ROW_ID, SYSAID_ID, SITE_ID, LINK_ID, CUSTOMER_NAME, SITE_CONTACT, TASK_TYPE, ADDRESS,
REGION, PHONE, FAX, MOBILE, EMAIL, LANDLORD_NAME, RENT_STATUS, LOCATION, POWER_STATUS, VOLTAGE_MEASUREMENT, AIRCON,
SERVER_ROOM_STATUS, LOCATION_IDU, EARTHING, DISTANCE_IDU, SECURITY_CABLES, DUCTS, UNIT_TYPE, INST_TYPE,
HAVE_ISP, RADIO, ISP_TYPE, ISP_NAME, SNR_RX, BS, REMARKS};
How do i fix images data in these

This will slow your database and application. Instead of this you can try to save to SDCard and keep URI at the db.

Very easy
Two options
one:
byte[] bytes = {...}
String str = new String(bytes, "UTF-8");
or
public static String encodeTobase64(Bitmap image)
{
Bitmap immagex=image;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
immagex.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] b = baos.toByteArray();
String imageEncoded = Base64.encodeToString(b,Base64.DEFAULT);
Log.e("LOOK", imageEncoded);
return imageEncoded;
}
public static Bitmap decodeBase64(String input)
{
byte[] decodedByte = Base64.decode(input, 0);
return BitmapFactory.decodeByteArray(decodedByte, 0, decodedByte.length);
}
two:
You can use GSON and make an object from all your text and ByteArray and what ever you want and than just do: GSON.toJson();

In a table , you can have many columns . To have text and images in same table you can have different columns for them with following data types :-
Text - VARCHAR
Images - BLOB
Sqlite is having a data type BLOB which can hold objects .

how can I store image and retrieve the same in sqlite-android

I am developing an application that stores some static images in sqlite and I want to retrieve the same in a imageview.
how do I do this
thanks.

sqlite3 supports the blob type, you can save the bitmap content using the blob type.
However, the blob type has a size limit, and to save to a blob type is difficult.
So, I suggest to save the bitmap local or on the sdcard, and save the path in the database.
added :
table define a column with name 'image' using blob type
Bitmap map = ...;
ByteArrayOutputStream bufferStream = new ByteArrayOutputStream(16*1024);
map.compress(CompressFormat.JPEG, 80, bufferStream);
byte[] bytes = bufferStream.toByteArray();
ContentValues values = new ContentValues();
values.put("image", bytes);
convert the image byte array, using SQLiteDatabase class method or content provider as you like:
public long insert (String table, String nullColumnHack, ContentValues values)
to insert to table, so it save the image to blob.
and then: when you query the blob data, you can create the image like this:
BitmapFactory.Options option2 = new BitmapFactory.Options();
option2.inPreferredConfig = Bitmap.Config.RGB_565;
// added for reducing the memory
option2.inDither = false;
option2.inPurgeable = true;
return BitmapFactory.decodeByteArray(bytes, 0, bytes.length, option2);
hope it can implement your request. -):

ORMLite and Images saved as BLOB on Android

So I recently switched my database stuff over to ORMLite in my android tablet application I am writing. So far so good, got most things refactored/recoded. Though I am having issues to what was originally stored in the database as a BLOB. In my original data model it looked like this:
byte[] imageBytes;
but I don't think I can use that in ORMLite, best I could tell it has to be a string so now I have:
#DatabaseField
String picture;
But now, I am confused as to how to read and write those data bits as bytes, etc...I was using code like this to ferry data to and from the database:
...
//Set the clients image to what was captured...
Bitmap resized2= android.graphics.Bitmap.createScaledBitmap(thumbnail, thumbnail.getWidth()/2, thumbnail.getHeight()/2, true);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
resized2.compress(Bitmap.CompressFormat.PNG, 100, baos); //bm is the bitmap object
byte[] b = baos.toByteArray();
mClient.setImageBytes(b);
myImage.setImageBitmap(resized2);
//do save to the database of the image to the blob whose column is picture
ContentValues initialValues = new ContentValues();
initialValues.put("picture", mClient.getImageBytes());
String [] strArray = {""+sid};
long n = dbAdapter.updateRecordsInDB("clients", initialValues, "_id=?", strArray);
So now thats how I WAS saving the image, I am not sure how to do this if there are no BLOBS in the ORMLite and I have to use strings?
for completeness this is how i would display the image:
if(mClient.getImageBytes().length <= 1) //no image in database, thats fine use generic
myImage.setImageResource(R.drawable.sillo); // create a sillouhtette face icon here...
else
myImage.setImageBitmap((BitmapFactory.decodeByteArray(mClient.getImageBytes(),0, (mClient.getImageBytes()).length)));
So what do i have to do to get these images in and out of the database, and is the field type of String correct for a "Blob" ?

You can indeed store byte[] fields in ORMLite. To quote the manual about byte arrays:
Array of bytes (byte[]) persisted as SQL type VARBINARY. This is different from the DataType.SERIALIZABLE type which serializes an object as an array of bytes.
NOTE: Because of backwards compatibility, any fields that are of type byte[] must be specified as DataType.BYTE_ARRAY or DataType.SERIALIZABLE using the dataType field and will not be auto-detected.
So, to use byte[] you will need to specify the type of the data:
#DatabaseField(dataType = DataType.BYTE_ARRAY)
byte[] imageBytes;
The trick is that ORMLite does not automatically detect the type of the byte[] because of some backwards compatibility issues.

Displaying image from the sqlite database using cursor in android

i want to display image in imageview from sqlite database using cursor. i used below code to retrieve image but i am not able to display image in imageview.
Cursor c=this.db.query(TABLE_NAME, new String[] { "name","price","image" },
null, null, null, null, null);
name.setText(c.getString(0));
price.setText(c.getString(1));
byte b[]=c.getBlob(2);
Bitmap bp=BitmapFactory.decodeByteArray(b, 0, b.length);
ImageView image=(ImageView)findViewById(R.id.ImageView);
//ByteArrayInputStream imageStream = new ByteArrayInputStream(b);
//Bitmap theImage = BitmapFactory.decodeStream(imageStream);
//image.setImageBitmap(theImage);
image.setImageBitmap(bp);
other than image, name and price will display but image will not display.
any suggestion or code that will help me to solve this problem.
Please help me.
Thanks in advance..

I've tried to use Stream instead of byte array, mine example simply works for me.
Also try to use Cursor.getColumnIndex()
byte[] blob = c.getBlob(c.getColumnIndex(YourDB.IMAGE));
ByteArrayInputStream inputStream = new ByteArrayInputStream(blob);
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
Here's my "create table" statement, pls double check yours
create table datatable(_id INTEGER PRIMARY KEY AUTOINCREMENT, image BLOB, price INTEGER);

First of all please did not store the images in database because sqlite will not support more then 1 mb,i may be wrong, images should be store in assets or drawble folder and the name of images should be store in database then you can get it from name to resource conversion by code
String videoFileName= c.getString(c.getColumnIndex(TB_SETTING_VIDEOFILENAME));
int dot = videoFileName.lastIndexOf(".");
videoFileName=videoFileName.substring(0,dot);
Log.d("VIDEOFILENAME", videoFileName);
int videoFileRId = getResources().getIdentifier(videoFileName , "raw", getPackageName());
I hope this will help you.

try this
cursor object; // your cursor
mImageView.setImageBitmap(getImageFromBLOB(object.getBlob(object.getColumnIndex("book_thumb"))));
public static Bitmap getImageFromBLOB(byte[] mBlob)
{
byte[] bb = mBlob;
return BitmapFactory.decodeByteArray(bb, 0, bb.length);
}

Problem in fetching image from database

Friend's,
I stored image url has a byte array in database has blob type and at time of fetching this image i'm getting nullpointer exception.how can i fix this problem,here the code for fetching data from db...
String bb = c.getString(c.getColumnIndex(JR_Constants.IMAGE_97));
Log.v(TAG,bb);
Bitmap theImage = BitmapFactory.decodeByteArray(bb, 0, bb.length);
myImage.setImageBitmap(theImage);
what i'm doing mistake here.

You need to convert the String to a ByteArray. Basically just do bb.getBytes() instead of passing bb
String bb = c.getString(c.getColumnIndex(JR_Constants.IMAGE_97));
Log.v(TAG,bb);
Bitmap theImage = BitmapFactory.decodeByteArray(bb.getBytes(), 0, bb.length());
myImage.setImageBitmap(theImage);
I just want to note that bb.length should be bb.length()