Fixed a potential NullPointerException after recreate() is called when setting a new theme

Author: maxieds

app/build.gradle

@@ -31,8 +31,8 @@ android {
         applicationId "com.maxieds.chameleonminilivedebugger"
         minSdkVersion 26
         targetSdkVersion 28
-        versionCode 59
-        versionName "0.5.9"
+        versionCode 60
+        versionName "0.6.0"
         //multiDexEnabled true
 
         buildConfigField "String", "GIT_COMMIT_HASH", "\"" + getGitCommitHash() + "\""

app/src/main/java/com/maxieds/chameleonminilivedebugger/LiveLoggerActivity.java

@@ -352,10 +352,11 @@ public void onReceive(Context context, Intent intent) {
      @Override
      public void recreate() {
 
-          unregisterReceiver(usbActionReceiver);
-          usbReceiversRegistered = false;
-          runningActivity = null;
-
+          if(usbActionReceiver != null) {
+               unregisterReceiver(usbActionReceiver);
+               usbReceiversRegistered = false;
+          }
+          //runningActivity = null;
           //super.recreate();
           Intent intent = getIntent();
           intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);