Add share activity

app/src/main/java/com/github/gotify/Utils.java

@@ -1,12 +1,14 @@
 package com.github.gotify;
 
 import android.app.Activity;
+import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
 import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
 import android.text.format.DateUtils;
 import android.view.View;
+import android.widget.Toast;
 import androidx.annotation.NonNull;
 import com.github.gotify.client.JSON;
 import com.github.gotify.log.Log;
@@ -96,4 +98,16 @@ public class Utils {
         if (str == null) return null;
         return new Buffer().writeUtf8(str).inputStream();
     }
+
+    public static <T> T first(T[] data) {
+        if (data.length != 1) {
+            throw new IllegalArgumentException("must be one element");
+        }
+
+        return data[0];
+    }
+
+    public static void showLongToast(Context context, String message) {
+        Toast.makeText(context, message, Toast.LENGTH_LONG).show();
+    }
 }