update README and screenshots

README.md

@@ -3,7 +3,7 @@
 
 A gallery for viewing photos and videos.
 
-A simple tool usable for viewing photos and videos. Items can be sorted by date, size, name both ascending or descending, photos can be zoomed in. Media files are shown in multiple columns, depending on the size of the display. They can be renamed, shared or deleted.
+A simple tool usable for viewing  photos and videos. Items can be sorted by date, size, name both ascending or descending, photos can be zoomed in. Media files are shown in multiple columns, depending on the size of the display. They can be renamed, shared or deleted. Images can also be cropped, rotated or set as Wallpaper directly from the app.
 
 The Gallery is also offered for third party usage for previewing images / videos, adding attachments at email clients etc. It's perfect for everyday usage.
 

app/src/main/java/com/simplemobiletools/gallery/ViewServer.java

@@ -0,0 +1,136 @@
+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 ViewServer {
+    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);
+        intent.setType(getMimeType(medium));
+        activity.startActivity(Intent.createChooser(intent, shareTitle));
+    }
+
+    public static String getMimeType(Medium medium) {
+        if (medium.getIsVideo())
+            return "video/*";
+        else
+            return "image/*";
+    }
+
+    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);
+    }
+}