added clearData to reset ViewModel data

Author: Spring Wong

app/src/main/java/com/spring/androidconductormvvmsample/controllers/DetailController.kt

@@ -47,5 +47,9 @@ class DetailController : Controller() {
         view.btnPush.clicks().subscribe({
             flowControl.push(DetailController())
         })
+
+        view.btnClear.clicks().subscribe({
+            viewModel.clearData()
+        })
     }
 }

app/src/main/java/com/spring/androidconductormvvmsample/viewModel/SimpleViewModel.kt

@@ -17,8 +17,8 @@ import javax.inject.Inject
  */
 class SimpleViewModel {
     @Inject
-    lateinit var service: GithubService
-    var user : User? = null
+    protected lateinit var service: GithubService
+    private var user : User? = null
 
     constructor() {
         MainActivity.graph.inject(this)
@@ -31,4 +31,9 @@ class SimpleViewModel {
             return service.getMyProfile().doOnSuccess { success -> this.user = success }.subscribeOn(Schedulers.newThread())
         }
     }
+
+    fun clearData() {
+        user = null
+    }
+
 }

app/src/main/res/layout/controller_detail.xml

@@ -41,4 +41,10 @@
         android:layout_height="wrap_content"
         android:text="Click Me to push new controller"/>
 
+    <Button
+        android:id="@+id/btnClear"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Click me to clear user cache"/>
+
 </LinearLayout>