CODEWITHSUNDEEP
androidimagebase64bitmapfactory
George
George

Reputation: 372

Android resizing large image recieved as base64 string

i have some issue resizing an image in android. i have a base64 string (i don't have a file or a url, just the string) and so far i get a out of memory exception as soon as i try to decode it. 

public String resizeBase64Image(String base64image){

    byte [] encodeByte=Base64.decode(base64image,Base64.DEFAULT); //out of memory exception...

    BitmapFactory.Options options=new BitmapFactory.Options();
    options.inPurgeable = true;
    Bitmap image = BitmapFactory.decodeByteArray(encodeByte, 0, encodeByte.length,options);

    image = Bitmap.createScaledBitmap(image, IMG_WIDTH, IMG_HEIGHT, false);

    ByteArrayOutputStream baos=new  ByteArrayOutputStream();
    image.compress(Bitmap.CompressFormat.PNG,100, baos);
    byte [] newbytes=baos.toByteArray();

    return Base64.encodeToString(newbytes, Base64.DEFAULT);

}

Does anybody have an idea?

Upvotes: 3

Views: 14177

Answers (3)

George
George

Reputation: 372

it took me a while to come back to this project but i finally found a solution to my issue. first, i needed to modify the application tag of the Manfest to add largeHeap=:true":

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme"
    android:largeHeap="true" >

Making use of the garbage collector helped a lot.

public String resizeBase64Image(String base64image){
    byte [] encodeByte=Base64.decode(base64image.getBytes(),Base64.DEFAULT); 
    BitmapFactory.Options options=new BitmapFactory.Options();
    options.inPurgeable = true;
    Bitmap image = BitmapFactory.decodeByteArray(encodeByte, 0, encodeByte.length,options);


    if(image.getHeight() <= 400 && image.getWidth() <= 400){
        return base64image;
    }
    image = Bitmap.createScaledBitmap(image, IMG_WIDTH, IMG_HEIGHT, false);

    ByteArrayOutputStream baos=new  ByteArrayOutputStream();
    image.compress(Bitmap.CompressFormat.PNG,100, baos);

    byte [] b=baos.toByteArray();
    System.gc();
    return Base64.encodeToString(b, Base64.NO_WRAP);

}

Upvotes: 12

justDroid
justDroid

Reputation: 351

Try this.

options.inSampleSize = 2;

Upvotes: -1

Vikasdeep Singh
Vikasdeep Singh

Reputation: 21766

In the case of OutOfMemoryError, below code may be helpful.

public String BitMapToString(Bitmap bitmap){
        ByteArrayOutputStream baos=new  ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.JPEG,100, baos);
        byte [] b=baos.toByteArray();
        String temp=null;
        try{
        System.gc();
        temp=Base64.encodeToString(b, Base64.DEFAULT);
        }catch(Exception e){
            e.printStackTrace();
        }catch(OutOfMemoryError e){
            baos=new  ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.JPEG,50, baos);
            b=baos.toByteArray();
            temp=Base64.encodeToString(b, Base64.DEFAULT);
            Log.e("EWN", "Out of memory error catched");
        }
        return temp;
  }

Basically what i did is : i catch OutofMemoryError and in that catch block i resize it by 50% and then i encode it to string.

Upvotes: 0

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