Updated destroy method (#20)

* Updated SDK to include BACKGROUND_REFRESH policy for actions

* Updated ReadMe for BACKGROUND_REFRESH

* Add Destroy method

AppLaunchClientAndroid/applaunch-client-android/src/main/java/com/ibm/mobile/applaunch/android/api/AppLaunch.java

@@ -88,7 +88,6 @@ public class AppLaunch {
    // private AppLaunchUser appLaunchUser;
 
     private AppLaunchCacheManager appLaunchCacheManager=null;
-    private boolean isInitialized = false;
     private AppLaunchResponseListener myListener;
     SharedPreferences prefs = null;
     private JSONArray features = null;
@@ -134,7 +133,7 @@ public void init(Application context,ICRegion region, String appGuid, String cli
             appContext = context;
             //if app launch listener ==null create a dummy action listener
             if(appLaunchActionListener==null) {
-             appLaunchActionListener = new AppLaunchListener() {
+                appLaunchActionListener = new AppLaunchListener() {
                     @Override
                     public void onSuccess(AppLaunchResponse response) {
 
@@ -168,6 +167,36 @@ public void onFailure(AppLaunchFailResponse failResponse) {
         }
     }
 
+    /**
+     *
+     * @param appLaunchListener
+     */
+    public void destroy(final AppLaunchListener appLaunchListener){
+        //TODO : Cache Clearing Mechanism and Check device is registered or not
+        if (appLaunchConfig != null && this.clientSecret != null) {
+            //send all the analytics event to the server
+            sendLogs();
+            //construct registration url
+            String registrationUrl = appLaunchUrlBuilder.getAppRegistrationURL();
+            //post the body to the server
+            AppLaunchInternalListener appLaunchInternalListener = new AppLaunchInternalListener() {
+                @Override
+                public void onSuccess(AppLaunchResponse appLaunchResponse) {
+                    // Clear all the cache
+
+                }
+
+                @Override
+                public void onFailure(AppLaunchFailResponse appLaunchFailResponse) {
+                    appLaunchListener.onFailure(appLaunchFailResponse);
+                }
+            };
+            sendDeleteRequest(registrationUrl, appLaunchInternalListener);
+        }else{
+            throw new RuntimeException("Invalid Init paramters");
+        }
+    }
+
 
     private void registerDevice(AppLaunchUser user,AppLaunchListener appLaunchActionListener) {
         if(user.getUserId()==null)
@@ -758,6 +787,38 @@ public void onFailure(Response response, Throwable t, JSONObject extendedInfo) {
         });
     }
 
+    private void sendDeleteRequest(String url, final AppLaunchInternalListener appLaunchListener) {
+
+        Request postReq = new Request(url, Request.DELETE);
+        // postReq.addHeader("clientSecret",appLaunchConfig.getClientSecret());
+
+        Map<String, List<String>> headers = new HashMap<>();
+        List<String> secretValues = new ArrayList<>();
+        secretValues.add(appLaunchConfig.getClientSecret());
+        headers.put("clientSecret", secretValues);
+        postReq.setHeaders(headers);
+
+        postReq.send(appContext, new ResponseListener() {
+            @Override
+            public void onSuccess(Response response) {
+                Log.d("POST INVOKE FUNCTION::", response.getResponseText());
+                if(response.getStatus() == 202) {
+                    AppLaunchResponse appLaunchResponse = new AppLaunchResponse();
+                    appLaunchListener.onSuccess(appLaunchResponse);
+                } else {
+                    AppLaunchFailResponse appLaunchFailResponse = new AppLaunchFailResponse(ErrorCode.UNREGISTRATION_FAILURE,response.getResponseText());
+                    appLaunchListener.onFailure(appLaunchFailResponse);
+                }
+            }
+
+            @Override
+            public void onFailure(Response response, Throwable t, JSONObject extendedInfo) {
+                AppLaunchFailResponse appLaunchFailResponse = new AppLaunchFailResponse(ErrorCode.UNREGISTRATION_FAILURE,response.getResponseText());
+                appLaunchListener.onFailure(appLaunchFailResponse);
+            }
+        });
+    }
+
 
 
     /**