Merge "[Settings] Avoid from crash UI when querying data usage" into tm-dev am: 5ef52de6b2

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/17950069

Change-Id: I5ecf6c2a9e1d5c5c9118b1d50da028119d30106c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

src/com/android/settings/datausage/DataUsageList.java

@@ -48,6 +48,7 @@ import android.widget.ImageView;
 import android.widget.Spinner;
 
 import androidx.annotation.VisibleForTesting;
+import androidx.lifecycle.Lifecycle;
 import androidx.loader.app.LoaderManager.LoaderCallbacks;
 import androidx.loader.content.Loader;
 import androidx.preference.Preference;
@@ -500,6 +501,17 @@ public class DataUsageList extends DataUsageBaseFragment
                         + cycle.end + "]");
             }
 
+            // Avoid from updating UI after #onStop.
+            if (!getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.STARTED)) {
+                return;
+            }
+
+            // Avoid from updating UI when async query still on-going.
+            // This could happen when a request from #onMobileDataEnabledChange.
+            if (mCycleData == null) {
+                return;
+            }
+
             // update chart to show selected cycle, and update detail data
             // to match updated sweep bounds.
             mChart.setNetworkCycleData(mCycleData.get(position));