Android Crop Center of Bitmap

Question

This can be achieved with: Bitmap.createBitmap(source, x, y, width, height)

if (srcBmp.getWidth() >= srcBmp.getHeight()){

  dstBmp = Bitmap.createBitmap(
     srcBmp, 
     srcBmp.getWidth()/2 - srcBmp.getHeight()/2,
     0,
     srcBmp.getHeight(), 
     srcBmp.getHeight()
     );

}else{

  dstBmp = Bitmap.createBitmap(
     srcBmp,
     0, 
     srcBmp.getHeight()/2 - srcBmp.getWidth()/2,
     srcBmp.getWidth(),
     srcBmp.getWidth() 
     );
}

While most of the above answers provide a way to do this, there is already a built-in way to accomplish this and it's 1 line of code (ThumbnailUtils.extractThumbnail())

int dimension = getSquareCropDimensionForBitmap(bitmap);
bitmap = ThumbnailUtils.extractThumbnail(bitmap, dimension, dimension);

...

//I added this method because people keep asking how 
//to calculate the dimensions of the bitmap...see comments below
public int getSquareCropDimensionForBitmap(Bitmap bitmap)
{
    //use the smallest dimension of the image to crop to
    return Math.min(bitmap.getWidth(), bitmap.getHeight());
}

If you want the bitmap object to be recycled, you can pass options that make it so:

bitmap = ThumbnailUtils.extractThumbnail(bitmap, dimension, dimension, ThumbnailUtils.OPTIONS_RECYCLE_INPUT);

From: ThumbnailUtils Documentation

public static Bitmap extractThumbnail (Bitmap source, int width, int height)

Added in API level 8 Creates a centered bitmap of the desired size.

Parameters source original bitmap source width targeted width height targeted height

I was getting out of memory errors sometimes when using the accepted answer, and using ThumbnailUtils resolved those issues for me. Plus, this is much cleaner and more reusable.

Have you considered doing this from the layout.xml ? You could set for your ImageView the ScaleType to android:scaleType="centerCrop" and set the dimensions of the image in the ImageView inside the layout.xml.

You can used following code that can solve your problem.

Matrix matrix = new Matrix();
matrix.postScale(0.5f, 0.5f);
Bitmap croppedBitmap = Bitmap.createBitmap(bitmapOriginal, 100, 100,100, 100, matrix, true);

Above method do postScalling of image before cropping, so you can get best result with cropped image without getting OOM error.

For more detail you can refer this blog

Here a more complete snippet that crops out the center of an [bitmap] of arbitrary dimensions and scales the result to your desired [IMAGE_SIZE]. So you will always get a [croppedBitmap] scaled square of the image center with a fixed size. ideal for thumbnailing and such.

Its a more complete combination of the other solutions.

final int IMAGE_SIZE = 255;
boolean landscape = bitmap.getWidth() > bitmap.getHeight();

float scale_factor;
if (landscape) scale_factor = (float)IMAGE_SIZE / bitmap.getHeight();
else scale_factor = (float)IMAGE_SIZE / bitmap.getWidth();
Matrix matrix = new Matrix();
matrix.postScale(scale_factor, scale_factor);

Bitmap croppedBitmap;
if (landscape){
    int start = (tempBitmap.getWidth() - tempBitmap.getHeight()) / 2;
    croppedBitmap = Bitmap.createBitmap(tempBitmap, start, 0, tempBitmap.getHeight(), tempBitmap.getHeight(), matrix, true);
} else {
    int start = (tempBitmap.getHeight() - tempBitmap.getWidth()) / 2;
    croppedBitmap = Bitmap.createBitmap(tempBitmap, 0, start, tempBitmap.getWidth(), tempBitmap.getWidth(), matrix, true);
}

Probably the easiest solution so far:

public static Bitmap cropCenter(Bitmap bmp) {
    int dimension = Math.min(bmp.getWidth(), bmp.getHeight());
    return ThumbnailUtils.extractThumbnail(bmp, dimension, dimension);
}

imports:

import android.media.ThumbnailUtils;
import java.lang.Math;
import android.graphics.Bitmap;

To correct @willsteel solution:

if (landscape){
                int start = (tempBitmap.getWidth() - tempBitmap.getHeight()) / 2;
                croppedBitmap = Bitmap.createBitmap(tempBitmap, start, 0, tempBitmap.getHeight(), tempBitmap.getHeight(), matrix, true);
            } else {
                int start = (tempBitmap.getHeight() - tempBitmap.getWidth()) / 2;
                croppedBitmap = Bitmap.createBitmap(tempBitmap, 0, start, tempBitmap.getWidth(), tempBitmap.getWidth(), matrix, true);
            }