Add a default OWM key during build

.gitlab-ci.yml

@@ -6,6 +6,7 @@ stages:
 before_script:
 - export GRADLE_USER_HOME=$(pwd)/.gradle
 - chmod +x ./gradlew
+- sed -i -e 's/<string name="default_key"><\/string>/<string name="default_key">'${DEFAULT_OWM_KEY}'<\/string>/g' app/src/main/res/values/strings.xml
 
 cache:
   key: ${CI_PROJECT_ID}

app/src/main/java/org/lineageos/openweathermapprovider/OpenWeatherMapProviderService.java

@@ -68,7 +68,7 @@ public class OpenWeatherMapProviderService extends WeatherProviderService
         final SharedPreferences preferences
                 = PreferenceManager.getDefaultSharedPreferences(this);
         preferences.registerOnSharedPreferenceChangeListener(this);
-        final String mApiId = preferences.getString(API_KEY, null);
+        final String mApiId = preferences.getString(API_KEY, getString(R.string.default_key));
         mOpenWeatherMapService.setApiKey(mApiId);
     }
 
@@ -146,7 +146,7 @@ public class OpenWeatherMapProviderService extends WeatherProviderService
     public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
         if (key.equals(API_KEY)) {
             Logging.logd("API key has changed");
-            final String mApiKey = sharedPreferences.getString(key, null);
+            final String mApiKey = sharedPreferences.getString(key, getString(R.string.default_key));
             mOpenWeatherMapService.setApiKey(mApiKey);
         }
     }

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

@@ -37,4 +37,6 @@
     <string name="prefscreen_disclaimer_summary">The information provided by this application is provided for general information purposes only</string>
     <string name="copyright_title">Copyright</string>
     <string name="copyright_summary">OpenWeatherMap is a registered trademark of OpenWeatherMap Inc, both in the United States and internationally</string>
+
+    <string name="default_key"></string>
 </resources>
\ No newline at end of file

app/src/main/res/xml/preferences.xml

@@ -41,4 +41,4 @@
             android:title="@string/copyright_title"
             android:summary="@string/copyright_summary" />
     </PreferenceCategory>
-</PreferenceScreen>
\ No newline at end of file
+</PreferenceScreen>