FossifyGallery/app/src/main/java/com/simplemobiletools/gallery/Utils.java

package com.simplemobiletools.gallery;

import android.Manifest;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.res.Resources;
import android.net.Uri;
import android.os.Build;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.ActionBar;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.Display;
import android.view.KeyCharacterMap;
import android.view.KeyEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.Window;
import android.webkit.MimeTypeMap;
import android.widget.Toast;

import com.simplemobiletools.gallery.models.Medium;

import java.io.File;

public class Utils {
    public static String getFilename(final String path) {
        return path.substring(path.lastIndexOf("/") + 1);
    }

    public static void showToast(Context context, int resId) {
        Toast.makeText(context, context.getResources().getString(resId), Toast.LENGTH_SHORT).show();
    }

    public static int getActionBarHeight(Context context, Resources res) {
        final TypedValue tv = new TypedValue();
        int height = 0;
        if (context.getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true)) {
            height = TypedValue.complexToDimensionPixelSize(tv.data, res.getDisplayMetrics());
        }
        return height;
    }

    public static int getStatusBarHeight(Resources res) {
        int id = res.getIdentifier("status_bar_height", "dimen", "android");
        if (id > 0) {
            return res.getDimensionPixelSize(id);
        }
        return 0;
    }

    public static int getNavBarHeight(Resources res) {
        int id = res.getIdentifier("navigation_bar_height", "dimen", "android");
        if (id > 0) {
            return res.getDimensionPixelSize(id);
        }
        return 0;
    }

    public static boolean hasNavBar(Activity act) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            Display display = act.getWindowManager().getDefaultDisplay();

            DisplayMetrics realDisplayMetrics = new DisplayMetrics();
            display.getRealMetrics(realDisplayMetrics);

            int realHeight = realDisplayMetrics.heightPixels;
            int realWidth = realDisplayMetrics.widthPixels;

            DisplayMetrics displayMetrics = new DisplayMetrics();
            display.getMetrics(displayMetrics);

            int displayHeight = displayMetrics.heightPixels;
            int displayWidth = displayMetrics.widthPixels;

            return (realWidth - displayWidth) > 0 || (realHeight - displayHeight) > 0;
        } else {
            boolean hasMenuKey = ViewConfiguration.get(act).hasPermanentMenuKey();
            boolean hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);
            return !hasMenuKey && !hasBackKey;
        }
    }

    public static boolean hasStoragePermission(Context cxt) {
        return ContextCompat.checkSelfPermission(cxt, Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED;
    }

    public static String getMimeType(String url) {
        final String extension = MimeTypeMap.getFileExtensionFromUrl(url);
        if (extension != null) {
            return MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
        }
        return "";
    }

    public static void shareMedium(Medium medium, Activity activity) {
        final String shareTitle = activity.getResources().getString(R.string.share_via);
        final Intent intent = new Intent();
        final File file = new File(medium.getPath());
        final Uri uri = Uri.fromFile(file);
        intent.setAction(Intent.ACTION_SEND);
        intent.putExtra(Intent.EXTRA_STREAM, uri);
        if (medium.getIsVideo()) {
            intent.setType("video/*");
        } else {
            intent.setType("image/*");
        }
        activity.startActivity(Intent.createChooser(intent, shareTitle));
    }

    public static void showSystemUI(ActionBar actionbar, Window window) {
        if (actionbar != null)
            actionbar.show();

        window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
                View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
                View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
    }

    public static void hideSystemUI(ActionBar actionbar, Window window) {
        if (actionbar != null)
            actionbar.hide();

        window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
                View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
                View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
                View.SYSTEM_UI_FLAG_LOW_PROFILE |
                View.SYSTEM_UI_FLAG_FULLSCREEN |
                View.SYSTEM_UI_FLAG_IMMERSIVE);
    }
}