Resize Image In Android Drawable

I have full resolution images in drawable folder need to resize according to phone screen size how to do that ?

Solution 1:

Do it like this

/************************ Calculations for Image Sizing *********************************/public Drawable ResizeImage(int imageID) { 
//Get device dimensions Displaydisplay= getWindowManager().getDefaultDisplay(); 
doubledeviceWidth= display.getWidth(); 

BitmapDrawable bd=(BitmapDrawable) this.getResources().getDrawable(imageID); 
doubleimageHeight= bd.getBitmap().getHeight(); 
doubleimageWidth= bd.getBitmap().getWidth(); 

doubleratio= deviceWidth / imageWidth; 
intnewImageHeight= (int) (imageHeight * ratio); 

BitmapbMap= BitmapFactory.decodeResource(getResources(), imageID); 
Drawabledrawable=newBitmapDrawable(this.getResources(),getResizedBitmap(bMap,newImageHeight,(int) deviceWidth)); 

return drawable; 
} 

/************************ Resize Bitmap *********************************/public Bitmap getResizedBitmap(Bitmap bm, int newHeight, int newWidth) { 

intwidth= bm.getWidth(); 
intheight= bm.getHeight(); 

floatscaleWidth= ((float) newWidth) / width; 
floatscaleHeight= ((float) newHeight) / height; 

// create a matrix for the manipulation Matrixmatrix=newMatrix(); 

// resize the bit map 
matrix.postScale(scaleWidth, scaleHeight); 

// recreate the new Bitmap BitmapresizedBitmap= Bitmap.createBitmap(bm, 0, 0, width, height, matrix, false); 

return resizedBitmap; 
}

Solution 2:

to get the width you should do this :

Displaydisplay= getWindowManager().getDefaultDisplay();
double deviceWidth;
if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.HONEYCOMB_MR1)
            deviceWidth= display.getWidth();
        else {
            display.getSize(size);
            deviceWidth=size.x;
        }