fix: prefill open-source ABRP API key

Author: malys

CHANGELOG.md

@@ -4,6 +4,13 @@ All notable changes to this project are documented here. Format follows
 [Keep a Changelog](https://keepachangelog.com/en/1.1.0/); versions follow
 [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.0.1] - 2026-08-03
+
+### Changed
+
+- Prefill the ABRP API-key input with the public open-source telemetry key while
+  preserving any custom key already saved by the user.
+
 ## [1.0.0] - 2026-08-02
 
 ### Added

app/build.gradle

@@ -34,8 +34,8 @@ android {
         applicationId "com.mg4.abrptelemetry"
         minSdk 27
         targetSdk 36
-        versionCode 1
-        versionName "1.0"
+        versionCode 2
+        versionName "1.0.1"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }

app/src/main/java/com/mg4/abrptelemetry/MainActivity.java

@@ -121,7 +121,7 @@ protected void onCreate(Bundle savedInstanceState) {
         // a no-op and does not even contain the updater.
         UpdateHook.checkInBackground(this);
 
-        apiKeyInput.setText(securePrefs.getString(SecurePrefs.KEY_API_KEY, ""));
+        apiKeyInput.setText(savedApiKeyOrDefault());
         tokenInput.setText(securePrefs.getString(SecurePrefs.KEY_TOKEN, ""));
         serviceSwitch.setChecked(prefs.getBoolean("service_enabled", false));
 
@@ -169,7 +169,7 @@ protected void onCreate(Bundle savedInstanceState) {
     @Override
     protected void onResume() {
         super.onResume();
-        apiKeyInput.setText(securePrefs.getString(SecurePrefs.KEY_API_KEY, ""));
+        apiKeyInput.setText(savedApiKeyOrDefault());
         tokenInput.setText(securePrefs.getString(SecurePrefs.KEY_TOKEN, ""));
         serviceSwitch.setChecked(prefs.getBoolean("service_enabled", false));
         // Poll state and log only while the screen is up; onPause cancels it.
@@ -178,6 +178,17 @@ protected void onResume() {
 
     // ---------- Credentials ----------
 
+    /**
+     * The SAIC open-source gateway publishes this shared ABRP key for compatible clients.
+     * A user-supplied key saved in encrypted preferences always takes precedence.
+     */
+    private String savedApiKeyOrDefault() {
+        String savedApiKey = securePrefs.getString(SecurePrefs.KEY_API_KEY, "");
+        return savedApiKey == null || savedApiKey.trim().isEmpty()
+                ? getString(R.string.default_abrp_api_key)
+                : savedApiKey;
+    }
+
     private void saveCredentials() {
         String apiKey = textOf(apiKeyInput);
         String token  = textOf(tokenInput);
@@ -331,7 +342,7 @@ private void applyConfig(String text) {
         edit.apply();
 
         // Re-read every control from prefs so the screen shows what was imported.
-        apiKeyInput.setText(securePrefs.getString(SecurePrefs.KEY_API_KEY, ""));
+        apiKeyInput.setText(savedApiKeyOrDefault());
         tokenInput.setText(securePrefs.getString(SecurePrefs.KEY_TOKEN, ""));
         apiKeyLayout.setError(null);
         tokenLayout.setError(null);

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

@@ -7,7 +7,8 @@
     <string name="tab_log">Log</string>
     <string name="card_config">Configuration</string>
     <string name="hint_api_key">ABRP API Key</string>
-    <string name="helper_api_key">Developer key from api.iternio.com — register your app to get one</string>
+    <string name="default_abrp_api_key" translatable="false">8cfc314b-03cd-4efe-ab7d-4431cd8f2e2d</string>
+    <string name="helper_api_key">Default: open-source ABRP telemetry key. You may replace it with your own.</string>
     <string name="api_key_required">Enter your ABRP API key first</string>
     <string name="hint_token">ABRP User Token</string>
     <string name="helper_token">Find your token in the ABRP app: Settings → Connections → Generic (Manual Entry)</string>