Workaround fix for https://github.com/ophio/secure-preferences/issues/18

.travis.yml

@@ -1,10 +1,11 @@
 language: android
-jdk: oraclejdk7
+jdk: openjdk8
 
 android:
   components:
     - build-tools-23.0.1
     - android-23
+    - android-18
     - extra
     - sys-img-armeabi-v7a-android-18
 
@@ -14,7 +15,7 @@ install:
    # Emulator Management: Create, Start and Wait
 before_script:
     - echo no | android create avd --force -n test -t android-18 --abi armeabi-v7a
-    - emulator -avd test -no-skin -no-audio -no-window &
+    - emulator -avd test -engine classic -no-skin -no-audio -no-window &
     - android-wait-for-emulator
     - adb shell input keyevent 82 &
 

library/src/main/java/in/co/ophio/secure/core/KeyStoreKeyGenerator.java

@@ -41,14 +41,19 @@ private KeyStoreKeyGenerator(Application application, String filename) {
         this.isHardwareBacked = KeyChain.isBoundKeyAlgorithm("RSA");
         this.keyFile = new File(application.getFilesDir(), filename);
 
-        try {
-            // Load secret key and ensure our root document is ready.
-            loadOrGenerateKeys();
-
-        } catch (IOException e) {
-            throw new IllegalStateException(e);
-        } catch (GeneralSecurityException e) {
-            throw new IllegalStateException(e);
+        //WORKAROUND for https://issuetracker.google.com/issues/37137351
+
+        for (int i = 0; i <= 2; i++) {
+            try {
+                // Load secret key and ensure our root document is ready.
+                loadOrGenerateKeys();
+
+            } catch (IOException | GeneralSecurityException e) {
+                keyFile.delete();
+                if (i >= 2) {
+                    throw new IllegalStateException("Failed to initialize KeyStoreKeyGenerator (failed to load security key)", e);   // fatal error
+                }
+            }
         }
     }