Analytics screen view tracking

Bug: 30927355
Change-Id: I99fcbfe73691f05ed4613ae9eb735a838b487bcd

Author: samtstern

analytics/app/src/main/java/com/google/firebase/quickstart/analytics/MainActivity.java

@@ -115,13 +115,20 @@ protected void onCreate(Bundle savedInstanceState) {
             @Override
             public void onPageSelected(int position) {
                 recordImageView();
+                recordScreenView();
             }
         });
 
         // Send initial screen screen view hit.
         recordImageView();
     }
 
+    @Override
+    public void onResume() {
+        super.onResume();
+        recordScreenView();
+    }
+
     /**
      * Display a dialog prompting the user to pick a favorite food from a list, then record
      * the answer.
@@ -236,6 +243,19 @@ private void recordImageView() {
         // [END image_view_event]
     }
 
+    /**
+     * This sample has a single Activity, so we need to manually record "screen views" as
+     * we change fragments.
+     */
+    private void recordScreenView() {
+        // This string must be <= 36 characters long in order for setCurrentScreen to succeed.
+        String screenName = getCurrentImageId() + "-" + getCurrentImageTitle();
+
+        // [START set_current_screen]
+        mFirebaseAnalytics.setCurrentScreen(this, screenName, null /* class override */);
+        // [END set_current_screen]
+    }
+
     /**
      * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
      * one of the sections/tabs/pages.