BitmapFactory Unable to decode stream

Question

Hey I am not sure why this keeps coming up every time I select an image in my gallery?

Here is the code:

if (v == uploadImageButton) {
                        // below allows you to open the phones gallery
                        Intent intent = new Intent();
                        intent.setType("image/*");
                        intent.setAction(Intent.ACTION_GET_CONTENT);
                        startActivityForResult(
                                        Intent.createChooser(intent, "Complete action using"), 1);
                }


public void onActivityResult(int requestCode, int resultCode, Intent data) {
                if (resultCode == RESULT_OK && requestCode == 1 && null != data) {
                        // Bitmap photo = (Bitmap) data.getData().getPath();
                        Uri selectedImageUri = data.getData();
                        String[] filePathColumn = { MediaStore.Images.Media.DATA };

                        Cursor cursor = getContentResolver().query(selectedImageUri,
                                        filePathColumn, null, null, null);
                        cursor.moveToFirst();

                        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                        String picturePath = cursor.getString(columnIndex);
                        cursor.close();
                        Log.e("Picture", picturePath);
                        decodeFile(picturePath);
                }
        }


public void decodeFile(String filePath) {
                // TODO Auto-generated method stub
                // Decode image size
                BitmapFactory.Options o = new BitmapFactory.Options();
                o.inJustDecodeBounds = true;
                BitmapFactory.decodeFile(filePath, o);

                // the new size we want to scale to
                final int REQUIRED_SIZE = 1024;

                // Find the correct scale value. It should be the power of 2.
                int width_tmp = o.outWidth, height_tmp = o.outHeight;
                int scale = 1;
                while (true) {
                        if (width_tmp < REQUIRED_SIZE && height_tmp < REQUIRED_SIZE) {
                                break;
                        }
                        width_tmp /= 2;
                        height_tmp /= 2;
                        scale *= 2;
                }

                // decode with inSampleSize
                BitmapFactory.Options o2 = new BitmapFactory.Options();
                o2.inSampleSize = scale;
                Bitmap bitmap = BitmapFactory.decodeFile(filePath, o2);

                imageview.setImageBitmap(bitmap);
        }

Error:

01-17 23:18:04.642: D/Documents(25157): onFinished() [content://com.android.providers.media.documents/document/image%3A901]
01-17 23:18:04.682: E/BitmapFactory(24993): Unable to decode stream: java.lang.NullPointerException
01-17 23:18:04.682: E/BitmapFactory(24993): Unable to decode stream: java.lang.NullPointerException
01-17 23:18:09.732: I/InputReader(766): Reconfiguring input devices.  changes=0x00000004
01-17 23:18:09.732: I/InputReader(766): Device reconfigured: id=4, name='touch_dev', size 1080x1920, orientation 3, mode 1, display id 0

Answer 1

Don't assume that there is a file path. Android 4.4 and up are about to remove them. And the uri you got has already no path.

You can still access the file content either through an InputStream (ContentResolver#openInputStream(Uri uri)) or through a file descriptor.

It's explained here: ContentProviders: Open a document (scroll down, link to section seems to be broken)

And that does work on older android versions too.

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK && requestCode == 1 && null != data) {
        decodeUri(data.getData());
    }
}

public void decodeUri(Uri uri) {
    ParcelFileDescriptor parcelFD = null;
    try {
        parcelFD = getContentResolver().openFileDescriptor(uri, "r");
        FileDescriptor imageSource = parcelFD.getFileDescriptor();

        // Decode image size
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;
        BitmapFactory.decodeFileDescriptor(imageSource, null, o);

        // the new size we want to scale to
        final int REQUIRED_SIZE = 1024;

        // Find the correct scale value. It should be the power of 2.
        int width_tmp = o.outWidth, height_tmp = o.outHeight;
        int scale = 1;
        while (true) {
            if (width_tmp < REQUIRED_SIZE && height_tmp < REQUIRED_SIZE) {
                break;
            }
            width_tmp /= 2;
            height_tmp /= 2;
            scale *= 2;
        }

        // decode with inSampleSize
        BitmapFactory.Options o2 = new BitmapFactory.Options();
        o2.inSampleSize = scale;
        Bitmap bitmap = BitmapFactory.decodeFileDescriptor(imageSource, null, o2);

        imageview.setImageBitmap(bitmap);

    } catch (FileNotFoundException e) {
        // handle errors
    } catch (IOException e) {
        // handle errors
    } finally {
        if (parcelFD != null)
            try {
                parcelFD.close();
            } catch (IOException e) {
                // ignored
            }
    }
}