Convert Dp To Px

Description

The formula for converting dp to px (pixels) is as follows:

where dpi is either 120, 160, 240, or 320.

If the Button on a 235 dpi screen, its actual width is

When run on the 180 dpi emulator, which isregarded as a 160 dpi device, its actual pixel is now 160 * (160/160) = 160 px.

In this case, one dp is equivalent to one px.

You can use the getWidth() method of a View object to get its width in pixels:

public void onClick(View view) {
    Toast.makeText (this,String.valueOf(view.getWidth()),Toast.LENGTH_LONG).show();
}