How to crop an image in android?

Question

Hello friends I am in a serious problem I have an image in my res/drawable folder. I want to crop the image when loading in an imageview. But i don't know how to do that. i.e i want to slice out some part of the image. Please anyone help me to do that Thankyou.

Answer 1

Hai this may help u,

Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(), 
           R.drawable.android);

    int width = bitmapOrg.width();
    int height = bitmapOrg.height();
    int newWidth = 200;
    int newHeight = 200;

    // calculate the scale - in this case = 0.4f
    float scaleWidth = ((float) newWidth) / width;
    float scaleHeight = ((float) newHeight) / height;

    // createa matrix for the manipulation
    Matrix matrix = new Matrix();
    // resize the bit map
    matrix.postScale(scaleWidth, scaleHeight);

    // recreate the new Bitmap
    Bitmap resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0, 
                      width, height, matrix, true); 

    // make a Drawable from Bitmap to allow to set the BitMap 
    // to the ImageView, ImageButton or what ever
    BitmapDrawable bmd = new BitmapDrawable(resizedBitmap);

    ImageView imageView = new ImageView(this);

    // set the Drawable on the ImageView
    imageView.setImageDrawable(bmd);

Answer 2

If you want to equally crop the outside of the image, you should check out the ScaleType attribute for an ImageView: http://developer.android.com/reference/android/widget/ImageView.ScaleType.html

In particular, you would be interested in the "centerCrop" option. It crops out part of the image that is larger than the defined size.

Here's an example of doing this in the XML layout:

<ImageView  android:id="@+id/title_logo"
            android:src="@drawable/logo"
            android:scaleType="centerCrop" android:padding="4dip"/>

Answer 3

 int targetWidth = 100;
 int targetHeight = 100;
 Bitmap targetBitmap = Bitmap.createBitmap(
 targetWidth, targetHeight,Bitmap.Config.ARGB_8888);
 Canvas canvas = new Canvas(targetBitmap);
 Path path = new Path();
 path.addRect(rectf, Path.Direction.CW);
 canvas.clipPath(path);
 canvas.drawBitmap(
 sourceBitmap,
 new Rect(0, 0, sourceBitmap.getWidth(), sourceBitmap.getHeight()),
 new Rect(0, 0, targetWidth, targetHeight),
 null);
 ImageView imageView = (ImageView)findViewById(R.id.my_image_view);
 imageView.setImageBitmap(targetBitmap);