Resize Image : Image « 2D Graphics « Android

1. Android
2. 2D Graphics
3. Image

Resize Image

   
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;

class MyUtils {
  public MyUtils() {
    
  }
  
  public static Drawable resizeImage(Context ctx, int resId, int w, int h) {

      // load the origial Bitmap
      Bitmap BitmapOrg = BitmapFactory.decodeResource(ctx.getResources(),
                                                      resId);

      int width = BitmapOrg.getWidth();
      int height = BitmapOrg.getHeight();
      int newWidth = w;
      int newHeight = newWidth * height / width;

      // calculate the scale
      float scaleWidth = ((float) newWidth) / width;
      float scaleHeight = ((float) newHeight) / height;

      // create a matrix for the manipulation
      Matrix matrix = new Matrix();
      // resize the Bitmap
      matrix.postScale(scaleWidth, scaleHeight);
      // if you want to rotate the Bitmap
      // matrix.postRotate(45);

      // 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
      return new BitmapDrawable(resizedBitmap);

    }
}

   
    
    
  

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