Added AlertDialog on first startup to inform the user, that this is an early alpha and that he/she should be careful.

app/src/main/java/de/vanitasvitae/sticktoalbum/MainActivity.java

@@ -44,6 +44,7 @@ public class MainActivity extends ActionBarActivity
 {
     private ArrayList<Uri> sharedMedia;
     private static String Tag = "stickToAlbum";
+    SharedPreferences sharedPref = null;
 
     @Override
     protected void onCreate(Bundle savedInstanceState)
@@ -51,7 +52,7 @@ public class MainActivity extends ActionBarActivity
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
+        sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
         String appDirectoryPath = sharedPref.getString(SettingsActivity.KEY_PREF_APP_PATH, "");
 
         if(appDirectoryPath.isEmpty())
@@ -83,6 +84,29 @@ public class MainActivity extends ActionBarActivity
         }
     }
 
+    protected void onResume()
+    {
+        super.onResume();
+
+        if (sharedPref.getBoolean("firstrun", true))
+        {
+            AlertDialog.Builder firstRunDialog = new AlertDialog.Builder(this);
+            firstRunDialog.setTitle(R.string.dialog_title_first_run);
+            firstRunDialog.setMessage(R.string.dialog_content_first_run);
+            firstRunDialog.setPositiveButton(R.string.understood, new DialogInterface.OnClickListener()
+            {
+                @Override
+                public void onClick(DialogInterface dialog, int which)
+                {
+                    dialog.dismiss();
+                }
+            });
+            firstRunDialog.setCancelable(false);
+            firstRunDialog.show();
+            sharedPref.edit().putBoolean("firstrun", false).commit();
+        }
+    }
+
     /**
      * Handle one single file being shared with the application.
      * Add the files Uri to the list of files to move and open the saveDialog.

app/src/main/res/values-de/strings.xml

@@ -6,12 +6,15 @@
 	<string name="dialog_content_on_start_from_home_screen">Teile Fotos (oder Videos) mit StickToAlbum, um diese in ein Album zu verschieben.</string>
 	<string name="dialog_title_unimplemented_feature">Funktion nicht verfügbar</string>
 	<string name="dialog_content_unimplemented_feature">Diese Funktion ist noch nicht fertig implementiert.\nSchau mal nach Updates :)</string>
+	<string name="dialog_title_first_run">Achtung!</string>
+	<string name="dialog_content_first_run">Diese App ist in einer frühen Entwicklungsphase und könnte instabil sein! Sei vorsichtig, wenn du deine schönsten Bilder verwaltest. Die App könnte abstürzen und die geteilten Daten vernichten!</string>
 	<string name="toast_invalid_album_name">Bitte gebe einen Albumnamen ein!</string>
 	<string name="action_settings">Einstellungen</string>
 	<string name="ok">OK</string>
 	<string name="cancel">Abbrechen</string>
+	<string name="understood">Ok, ich werde vorsichtig sein.</string>
 	<string name="hint_album_name">Neues Album</string>
 
 	<string name="pref_title_app_path">Speicherort</string>
-	<string name="pref_description_app_path">Wo sollen neue Alben angelegt werden? Um zurückzusetzen, lösche diesen Wert und starte die App neu.</string>
+	<string name="pref_description_app_path">Wo sollen neue Alben angelegt werden? Um den Speicherort auf den Standardwert zurückzusetzen, lösche diesen Wert und starte die App neu.</string>
 </resources>

app/src/main/res/values/strings.xml

@@ -6,12 +6,15 @@
 	<string name="dialog_content_on_start_from_home_screen">In order to stick photos in albums, you have to share those photos (or videos) with this app.</string>
 	<string name="dialog_title_unimplemented_feature">Feature unavailable</string>
 	<string name="dialog_content_unimplemented_feature">This feature is not implemented yet.\nCheck out updates :)</string>
+	<string name="dialog_title_first_run">Warning!</string>
+	<string name="dialog_content_first_run">This app is an early alpha version and can be unstable! Do not rely on it while handling your most precious images. The app may crash and destroy your data!</string>
 	<string name="toast_invalid_album_name">Please enter valid album name!</string>
 	<string name="action_settings">Settings</string>
 	<string name="ok">OK</string>
 	<string name="cancel">Cancel</string>
+	<string name="understood">I will be careful!</string>
 	<string name="hint_album_name">New Album</string>
 
 	<string name="pref_title_app_path">Album Directory</string>
-	<string name="pref_description_app_path">In which directory are Albums located? Delete value and restart app to reset.</string>
+	<string name="pref_description_app_path">In which directory are Albums located? Delete value and restart the app to reset this to default.</string>
 </resources>