Collects useful data of the device physical screen and window components

DeviceMetrics.java

import android.content.Context;
import android.graphics.Point;
import android.view.WindowManager;


/*
    @author Filip Bongcam

    DEVICE METRICS
    Collects useful data of the device physical screen and window components

    @param context
 */

public class DeviceMetrics {
    private Context context;

    // System UI
    private int status_bar_height;
    private int navigation_bar_height;

    // Display
    private float displayDensity;
    private int displayHeight_real;     // Display height with status and navigation bar
    private int displayWidth_real;
    private int displayHeight;          // Display height without status and navigation bar
    private int displayWidth;

    public DeviceMetrics(Context context)
    {
        this.context = context;
        status_bar_height = context.getResources().getIdentifier("status_bar_height", "dimen","android");
        navigation_bar_height = context.getResources().getIdentifier("navigation_bar_height", "dimen", "android");

        // Display density
        displayDensity = context.getResources().getDisplayMetrics().density;
        displayHeight = context.getResources().getDisplayMetrics().heightPixels;
        displayWidth = context.getResources().getDisplayMetrics().widthPixels;

        // Physical screen size in px
        Point points = new Point();
        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        wm.getDefaultDisplay().getRealSize(points);
        displayHeight_real = points.y;
        displayWidth_real = points.x;
    }

    public int getStatusbar_height()
    {
        return context.getResources().getDimensionPixelSize(status_bar_height);
    }

    public int getNavigationbar_height()
    {
        return context.getResources().getDimensionPixelSize(navigation_bar_height);
    }

    public int getWindowHeight() { return displayHeight; }
    public int getWindowWidth() { return displayWidth; }
    public int getDisplayHeight()
    {
        return displayHeight_real;
    }
    public int getDisplayWidth()
    {
        return displayWidth_real;
    }

    /*
        Converts px to dp based on display desnsity
        Source: https://stackoverflow.com/questions/4605527/converting-pixels-to-dp
     */
    public float dpFromPx(float px) {
        return px / displayDensity;
    }

    /*
        Converts dp to px based on display desnsity
        Source: https://stackoverflow.com/questions/4605527/converting-pixels-to-dp
     */
    public float pxFromDp(float dp) {
        return dp * displayDensity;
    }
}