Can I get the screen size in pixels?

If you want to get the size of the screen in pixels, you can use the getSize method.

Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;
int height = size.y;

If the situation is not within the activity, you can get the display (information about the screen) using WINDOW_SERVICE as shown below.

WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();

Before the getSize method came out (API level 13), the getWidth and getHeight methods were used (not used now).

Display display = getWindowManager().getDefaultDisplay(); 
int width = display.getWidth();  // deprecated
int height = display.getHeight();  // deprecated

However, in the case of the above situation, it seems better to use the margin or padding of the layout.

Display Metrics is also available. Display Metrics provides a function to express general information about the screen (size, display density, font size, etc.) To access the components of Display Metrics, please initialize the object as follows.

DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);

I want to get the horizontal size of the screen in pixels. You can use the widthPixels method.

Log.d("ApplicationTagName", "Display width in px is " + metrics.widthPixels);