AndroidUiHelper.java

package net.osmand.plus.helpers;

import net.osmand.PlatformUtil;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.Surface;
import android.view.View;

/**
 * Created by dummy on 28.01.15.
 */
public class AndroidUiHelper {

    public static int getScreenOrientation(Activity activity) {
        int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
        DisplayMetrics dm = new DisplayMetrics();
        activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
        int width = dm.widthPixels;
        int height = dm.heightPixels;
        int orientation;
        // if the device's natural orientation is portrait:
        if ((rotation == Surface.ROTATION_0
                || rotation == Surface.ROTATION_180) && height > width ||
                (rotation == Surface.ROTATION_90
                        || rotation == Surface.ROTATION_270) && width > height) {
            switch(rotation) {
                case Surface.ROTATION_0:
                    orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
                    break;
                case Surface.ROTATION_90:
                    orientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
                    break;
                case Surface.ROTATION_180:
                    orientation =
                            ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
                    break;
                case Surface.ROTATION_270:
                    orientation =
                            ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
                    break;
                default:
                    Log.e(PlatformUtil.TAG, "Unknown screen orientation. Defaulting to " +
                            "portrait.");
                    orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
                    break;
            }
        }
        // if the device's natural orientation is landscape or if the device
        // is square:
        else {
            switch(rotation) {
                case Surface.ROTATION_0:
                    orientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
                    break;
                case Surface.ROTATION_90:
                    orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
                    break;
                case Surface.ROTATION_180:
                    orientation =
                            ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
                    break;
                case Surface.ROTATION_270:
                    orientation =
                            ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
                    break;
                default:
                    Log.e(PlatformUtil.TAG, "Unknown screen orientation. Defaulting to " +
                            "landscape.");
                    orientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
                    break;
            }
        }

        return orientation;
    }
    
    public static boolean updateVisibility(View view, boolean visible) {
		if (view != null && visible != (view.getVisibility() == View.VISIBLE)) {
			if (visible) {
				view.setVisibility(View.VISIBLE);
			} else {
				view.setVisibility(View.GONE);
			}
			view.invalidate();
			return true;
		}
		return false;
	}
    
	public static boolean isXLargeDevice(Activity ctx) {
		int lt = (ctx.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK);
		return lt == Configuration.SCREENLAYOUT_SIZE_XLARGE;
	}

	public static boolean isOrientationPortrait(Activity ctx) {
		int orientation = AndroidUiHelper.getScreenOrientation(ctx);
		return orientation == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT ||
				orientation == ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
	}
}