Fix settings panel refresh issue

We use updatePanelWithAnimation() to make old panel animated out
and new panel animated in. But if old panel is in background, we
don't need the animation out process. Use a flag mForceCreation
to check, if activity is onStop() means it is in background, we
don't need the animation.

Fixes: 140541182
Test: manual
Change-Id: I9a2f555dba5417a108ce35fac25a62cf7a8b1d8b

src/com/android/settings/panel/SettingsPanelActivity.java

@@ -59,6 +59,8 @@ public class SettingsPanelActivity extends FragmentActivity {
      */
     public static final String KEY_MEDIA_PACKAGE_NAME = "PANEL_MEDIA_PACKAGE_NAME";
 
+    private boolean mForceCreation = false;
+
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -70,7 +72,19 @@ public class SettingsPanelActivity extends FragmentActivity {
     protected void onNewIntent(Intent intent) {
         super.onNewIntent(intent);
         setIntent(intent);
-        createOrUpdatePanel(false /* shouldForceCreation */);
+        createOrUpdatePanel(mForceCreation);
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        mForceCreation = false;
+    }
+
+    @Override
+    protected void onStop() {
+        super.onStop();
+        mForceCreation = true;
     }
 
     private void createOrUpdatePanel(boolean shouldForceCreation) {
@@ -91,7 +105,7 @@ public class SettingsPanelActivity extends FragmentActivity {
         final FragmentManager fragmentManager = getSupportFragmentManager();
         final Fragment fragment = fragmentManager.findFragmentById(R.id.main_content);
 
-        // If fragment already exists, we will need to update panel with animation.
+        // If fragment already exists and visible, we will need to update panel with animation.
         if (!shouldForceCreation && fragment != null && fragment instanceof PanelFragment) {
             final PanelFragment panelFragment = (PanelFragment) fragment;
             panelFragment.setArguments(mBundle);