android Imageview layoutparams in dip?

Question

I'm using the following code :

ImageView i = new ImageView(mContext);

i.setImageResource(mImageIds[position]);

i.setScaleType(ImageView.ScaleType.FIT_XY);

       //pixels settings !!!

i.setLayoutParams(new Gallery.LayoutParams(200, 100));

but as you can see, it is setting the layout dimensions in pixels.

Does anybody know how to do the same thing but in "dip" ?

Solution 1

See http://developer.android.com/guide/practices/screens_support.html#screen-independence

On how to convert from dpi to pixels.

Solution 2

The following helper method takes as input device independent pixels (DIP) and returns actual pixels for the current device.

private int getPixels(int dipValue) {
    Resources r = getResources();
    int px = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
                                            dipValue, 
                                            r.getDisplayMetrics());
    return px;
}

Solution 3

If you store your dimension as a resource, you can use

getResources().getDimensionPixelSize(id);

This will also make it easier to adjust your layouts.