How to get Bitmap from an Uri?


Question

How to get a Bitmap object from an Uri (if I succeed to store it in /data/data/MYFOLDER/myimage.png or file///data/data/MYFOLDER/myimage.png) to use it in my application?

Does anyone have an idea on how to accomplish this?

1
179
6/9/2016 2:04:38 PM

Accepted Answer

. . IMPORTANT: See answer from @Mark Ingram below and @pjv for at better solution. . .

You could try this:

public Bitmap loadBitmap(String url)
{
    Bitmap bm = null;
    InputStream is = null;
    BufferedInputStream bis = null;
    try 
    {
        URLConnection conn = new URL(url).openConnection();
        conn.connect();
        is = conn.getInputStream();
        bis = new BufferedInputStream(is, 8192);
        bm = BitmapFactory.decodeStream(bis);
    }
    catch (Exception e) 
    {
        e.printStackTrace();
    }
    finally {
        if (bis != null) 
        {
            try 
            {
                bis.close();
            }
            catch (IOException e) 
            {
                e.printStackTrace();
            }
        }
        if (is != null) 
        {
            try 
            {
                is.close();
            }
            catch (IOException e) 
            {
                e.printStackTrace();
            }
        }
    }
    return bm;
}

But remember, this method should only be called from within a thread (not GUI -thread). I a AsyncTask.

-30
2/28/2014 11:22:29 AM

Here's the correct way of doing it:

protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK)
    {
        Uri imageUri = data.getData();
        Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri);
    }
}

If you need to load very large images, the following code will load it in in tiles (avoiding large memory allocations):

BitmapRegionDecoder decoder = BitmapRegionDecoder.newInstance(myStream, false);  
Bitmap region = decoder.decodeRegion(new Rect(10, 10, 50, 50), null);

See the answer here


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