I want to upload my gallery image to localhost database in the form of string from android but i did not found any relevant topic. Please guide me
you can convert you Image bitmap to base64 String by this code :`
`ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream);
byte[] byteArray = byteArrayOutputStream .toByteArray();
String encoded = Base64.encodeToString(byteArray, Base64.DEFAULT);
I'm going to convert file to base64 so I send file and convert it to bitmap and when i want to compress it, it give me error null point exception
this is what everything that i did.
public static String getFileToByte(String path){
Bitmap bm = null;
ByteArrayOutputStream baos = null;
byte[] b = null;
String encodeString = null;
try{
bm = BitmapFactory.decodeFile(path);
baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.JPEG, 100, baos);
b = baos.toByteArray();
encodeString = Base64.encodeToString(b, Base64.DEFAULT);
}catch (Exception e){
e.printStackTrace();
}
return encodeString;
}
I got error on this error:
bm.compress(Bitmap.CompressFormat.JPEG, 100, baos);
and pass:
getFileToByte(image.getAbsolutePath());
Do not convert the file to a bitmap first. Your bitmap is null as there is not enough memory to construct a bitmap for that image file with big resolution.
Instead you should directly base64 encode the bytes of the file.
Then your code is the same for all kind of files too.
I am trying to convert an image stored in Database in Base64 format, to a Bitmap to be used in an Imageview.
So, I store it in SQLite this way:
Bitmap imageBitmap = (Bitmap) extras.get("data");
ByteArrayOutputStream stream = new ByteArrayOutputStream();
Bitmap fotoGrande=(Bitmap) extras.get("data");
imageBitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
//I am adding some data to EXIF here, add to an static ArrayList<Bitmap> in other class and I store it this way:
int bytes=listaFotos.get(i).getFoto().getByteCount();
ByteBuffer buffer = ByteBuffer.allocate(bytes);
listaFotos.get(i).getFoto().copyPixelsToBuffer(buffer);
values.put("foto", Base64.encodeToString(buffer.array(), Base64.DEFAULT));
Later, i need to get that image to fit it in an ImageView:
String foto = csr2.getString(0);//csr2 is a cursor
byte[] arrayFoto = Base64.decode(foto, Base64.DEFAULT);//This is not null
Bitmap fotoBitmap = BitmapFactory.decodeByteArray(arrayFoto, 0, arrayFoto.length);//This is null
I know there are tons of questions about this. I searched, but no answer fix my problem.
Why is my BitmapFactory.decodeByteArray returning null? What I am doing wrong? Any help?
Thank you.
Turned out to be a database issue. SQLite gives you a cursor of 1MB MAX size. I was getting the bytes from database, with a 1MB cursor, the pic was not sent properly.
To fix it, I stored the path to the photo in database instead of the bytes.
firstly image is convert in Bitmap to String like this
ByteArrayOutputStream stream = new ByteArrayOutputStream();
camera.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byte imageInByte[] = stream.toByteArray();
String encodedImage = Base64.encodeToString(imageInByte, Base64.DEFAULT);
where camera is a Bitmap.
and store the String encodedImage in database
And getImage string like this
byte[] b = Base64.decode(encodedImage , Base64.DEFAULT);
Bitmap bitmap = BitmapFactory.decodeByteArray(b, 0, b.length);
Newb question;
I've got a bitmap in memory;
Private Bitmap MyPicture;
Then later, I fill that MyPicture from imager from the camera. I need to upload that photo using the FTP client from the apache commons.
fcon.storeFile("filename", new BufferedInputStream(MyPicture.????));
But the apache want a BufferedInputStream. How do I convert the memory Bitmap to a memory stream?
Thanks guys!
This is what I was looking for;
ByteArrayOutputStream stream = new ByteArrayOutputStream();
si.Image.compress(CompressFormat.JPEG, 100, stream);
InputStream is = new ByteArrayInputStream(stream.toByteArray());
The last line was the missing link...
Converting the bitmap to a byte array is as easy as:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
MyPicture.compress(Bitmap.CompressFormat.PNG, 100, baos);
baos.toByteArray();
And then you can create a BufferedInputStreamto write the bytes to your file.
I have a Base64 String that represents a BitMap image.
I need to transform that String into a BitMap image again to use it on a ImageView in my Android app
How to do it?
This is the code that I use to transform the image into the base64 String:
//proceso de transformar la imagen BitMap en un String:
//android:src="c:\logo.png"
Resources r = this.getResources();
Bitmap bm = BitmapFactory.decodeResource(r, R.drawable.logo);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100, baos); //bm is the bitmap object
byte[] b = baos.toByteArray();
//String encodedImage = Base64.encode(b, Base64.DEFAULT);
encodedImage = Base64.encodeBytes(b);
You can just basically revert your code using some other built in methods.
byte[] decodedString = Base64.decode(encodedImage, Base64.DEFAULT);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
To anyone who is still interested in this question:
If:
1-decodeByteArray returns null
2-Base64.decode throws bad-base64 Exception
Here is the solution:
-You should consider the value sent to you from API is Base64 Encoded and should be decoded first in order to cast it to a Bitmap object!
-Take a look at your Base64 encoded String, If it starts with
data:image/jpg;base64
The Base64.decode won't be able to decode it, So it has to be removed from your encoded String:
final String encodedString = "data:image/jpg;base64, ....";
final String pureBase64Encoded = encodedString.substring(encodedString.indexOf(",") + 1);
Now the pureBase64Encoded object is ready to be decoded:
final byte[] decodedBytes = Base64.decode(pureBase64Encoded, Base64.DEFAULT);
Now just simply use the line below to turn this into a Bitmap Object! :
Bitmap decodedBitmap = BitmapFactory.decodeByteArray(decodedBytes, 0,
decodedBytes.length);
Or if you're using the great library Glide:
Glide.with(CaptchaFragment.this).load(decodedBytes).crossFade().fitCenter().into(mCatpchaImageView);
This should do the job! It wasted one day on this and came up to this solution!
Note:
If you are still getting bad-base64 error consider other Base64.decode flags like Base64.URL_SAFE and so on
This is a very old thread but thought to share this answer as it took lot of my development time to manage NULL return of BitmapFactory.decodeByteArray() as #Anirudh has faced.
If the encodedImage string is a JSON response, simply use Base64.URL_SAFE instead of Base64.DEAULT
byte[] decodedString = Base64.decode(encodedImage, Base64.URL_SAFE);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
To check online you can use
http://codebeautify.org/base64-to-image-converter
You can convert string to image like this way
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Base64;
import android.widget.ImageView;
import java.io.ByteArrayOutputStream;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ImageView image =(ImageView)findViewById(R.id.image);
//encode image to base64 string
ByteArrayOutputStream baos = new ByteArrayOutputStream();
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.logo);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] imageBytes = baos.toByteArray();
String imageString = Base64.encodeToString(imageBytes, Base64.DEFAULT);
//decode base64 string to image
imageBytes = Base64.decode(imageString, Base64.DEFAULT);
Bitmap decodedImage = BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length);
image.setImageBitmap(decodedImage);
}
}
http://www.thecrazyprogrammer.com/2016/10/android-convert-image-base64-string-base64-string-image.html
This is a great sample:
String base64String = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAIAAAACACAYAAADDPmHLAA...";
String base64Image = base64String.split(",")[1];
byte[] decodedString = Base64.decode(base64Image, Base64.DEFAULT);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
imageView.setImageBitmap(decodedByte);
Sample found at: https://freakycoder.com/android-notes-44-how-to-convert-base64-string-to-bitmap-53f98d5e57af
This is the only code that worked for me in the past.
I've found this easy solution
To convert from bitmap to Base64 use this method.
private String convertBitmapToBase64(Bitmap bitmap) {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream);
byte[] byteArray = byteArrayOutputStream .toByteArray();
return Base64.encodeToString(byteArray, Base64.DEFAULT);
}
To convert from Base64 to bitmap OR revert.
private Bitmap convertBase64ToBitmap(String b64) {
byte[] imageAsBytes = Base64.decode(b64.getBytes(), Base64.DEFAULT);
return BitmapFactory.decodeByteArray(imageAsBytes, 0, imageAsBytes.length);
}
In Kotlin you can use extension function as bellow:
fun String.base64ToByteCode() = Base64.decode(this.substring(this.indexOf(",") + 1), Base64.DEFAULT)
and call it as bellow:
yourBase64String.base64ToByteCode()
This solution is working fine for me. if you receive null please let me know.
private void bytesToImage(ImageView imageView, String base64String) {
if (!base64String.isEmpty()) {
byte[] bytes = Base64.decode(base64String, Base64.DEFAULT);
Bitmap decodedByte = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
Glide.with(this).load(decodedByte).into(imageView);
}
I have tried all the solutions and this one worked for me
let temp = base64String.components(separatedBy: ",")
let dataDecoded : Data = Data(base64Encoded: temp[1], options:
.ignoreUnknownCharacters)!
let decodedimage = UIImage(data: dataDecoded)
yourImage.image = decodedimage