more README info; pictures; DB closure for ShareActivity

app/src/main/java/org/seanandroid/mealieurlshare/ShareActivity.kt

@@ -35,6 +35,7 @@ class ShareActivity : AppCompatActivity() {
         // Get the shared text
         val sharedText = intent.getStringExtra(Intent.EXTRA_TEXT)
 
+        // pull variables from our app's SQLite DB
         val url = dbHelper.getUrl()
         val token = dbHelper.getToken()
 
@@ -46,6 +47,12 @@ class ShareActivity : AppCompatActivity() {
         }
     }
 
+    // Closes DB when process closes
+    override fun onDestroy() {
+        super.onDestroy()
+        dbHelper.close()
+    }
+
     private fun sendPostRequest(url: String, token: String, sharedText: String) {
         isRequestRunning = true
         val fullUrl = "$url/api/recipes/create/url"
@@ -84,6 +91,7 @@ class ShareActivity : AppCompatActivity() {
             override fun onResponse(call: Call, response: Response) {
                 isRequestRunning = false
                 if (response.isSuccessful) {
+                    // Send a Toast notification to the running UI (if successfully POSTed)
                     runOnUiThread {
                         Toast.makeText(this@ShareActivity, "URL sent to your Mealie API", Toast.LENGTH_SHORT).show()
                     }