How To Scale An Image Down In Android

I am creating an android application and I can add an image. However, what I want to do is scale down the image to fit the ImageButton size. Is there any way to do that? The code I

Solution 1:

Here is some code that might help you:

Replace this code

BitmapFactory.Options options = new BitmapFactory.Options();
                    options.inScaled = true;
                    final Uri imageURI = imageReturnedIntent.getData();
                    final InputStream inStr = getContentResolver().openInputStream(imageURI);
                    final Bitmap selectImg = BitmapFactory.decodeStream(inStr, null, options);
                    addPic.setImageBitmap(selectImg);

with the code below

final Uri imageURI = imageReturnedIntent.getData();
                    final InputStream inStr = new BufferedInputStream(getContentResolver().openInputStream(imageURI));

                    int height = addPic.getHeight();
                    int width = addPic.getWidth();

                    BitmapFactory.Options options = new BitmapFactory.Options();
                    options.inJustDecodeBounds = true;
                    BitmapFactory.decodeStream(inStr, null, options);

                    // Calculate inSampleSize
                    options.inSampleSize = calculateInSampleSize(options, width, height);

                    // Decode bitmap with inSampleSize set
                    options.inJustDecodeBounds = false;

                    try {
                        inStr.reset();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }

                    Bitmap selectImg = BitmapFactory.decodeStream(inStr, null, options);
                    addPic.setImageBitmap(selectImg);

And add this function to your class

public int calculateInSampleSize(
            BitmapFactory.Options options, int reqWidth, int reqHeight) {
        // Raw height and width of image
        final int height = options.outHeight;
        final int width = options.outWidth;
        int inSampleSize = 1;

        if (height > reqHeight || width > reqWidth) {

            // Calculate ratios of height and width to requested height and width
            final int heightRatio = Math.round((float) height / (float) reqHeight);
            final int widthRatio = Math.round((float) width / (float) reqWidth);

            // Choose the smallest ratio as inSampleSize value, this will guarantee
            // a final image with both dimensions larger than or equal to the
            // requested height and width.
            inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
        }

        return inSampleSize;
    }

For more information you can refer http://developer.android.com/training/displaying-bitmaps/load-bitmap.html

Solution 2:

Use Scale attribute of ImageButton as :

  <ImageButton
            android:id="@+id/addImage"
            android:layout_width="0dp"
            android:layout_height="58dp"
            android:layout_weight="1"
            android:scaleType="fitXY"
            android:background="@drawable/ic_social_person" />

Solution 3:

Try using this property on your ImageButton:

<ImageButton 
     android:scaleType="fitXY"
     ... />

Hope this helps :)

Solution 4:

Maybe take out this from your ImageButton xml

android:layout_weight="1"