Add progress bar for Privacy screen

We show up top linear progress bar
when Settings is querying permission usage data.

Test: visual, robotest
Fixes: 123539793
Change-Id: I350068856d1708eb054d2a205d9ca857214891ce

src/com/android/settings/privacy/PermissionBarChartPreferenceController.java

@@ -31,28 +31,29 @@ import android.util.Log;
 import android.view.View;
 
 import androidx.annotation.NonNull;
-import androidx.preference.Preference;
 import androidx.preference.PreferenceScreen;
 
 import com.android.settings.R;
 import com.android.settings.core.BasePreferenceController;
+import com.android.settingslib.Utils;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnStart;
 import com.android.settingslib.widget.BarChartInfo;
 import com.android.settingslib.widget.BarChartPreference;
 import com.android.settingslib.widget.BarViewInfo;
-import com.android.settingslib.Utils;
 
 import java.util.ArrayList;
 import java.util.Comparator;
 import java.util.List;
-import java.util.concurrent.Executors;
 
 
 public class PermissionBarChartPreferenceController extends BasePreferenceController implements
-        PermissionControllerManager.OnPermissionUsageResultCallback {
+        PermissionControllerManager.OnPermissionUsageResultCallback, LifecycleObserver, OnStart {
 
     private static final String TAG = "BarChartPreferenceCtl";
 
     private PackageManager mPackageManager;
+    private PrivacyDashboardFragment mParent;
     private BarChartPreference mBarChartPreference;
     private List<RuntimePermissionUsageInfo> mOldUsageInfos;
 
@@ -62,6 +63,10 @@ public class PermissionBarChartPreferenceController extends BasePreferenceContro
         mPackageManager = context.getPackageManager();
     }
 
+    public void setFragment(PrivacyDashboardFragment fragment) {
+        mParent = fragment;
+    }
+
     @Override
     public int getAvailabilityStatus() {
         return Boolean.parseBoolean(
@@ -90,7 +95,13 @@ public class PermissionBarChartPreferenceController extends BasePreferenceContro
     }
 
     @Override
-    public void updateState(Preference preference) {
+    public void onStart() {
+        if (!isAvailable()) {
+            return;
+        }
+
+        mBarChartPreference.updateLoadingState(true /* isLoading */);
+        mParent.setLoadingEnabled(true /* enabled */);
         retrievePermissionUsageData();
     }
 
@@ -104,6 +115,9 @@ public class PermissionBarChartPreferenceController extends BasePreferenceContro
             mBarChartPreference.setBarViewInfos(createBarViews(usageInfos));
             mOldUsageInfos = usageInfos;
         }
+
+        mBarChartPreference.updateLoadingState(false /* isLoading */);
+        mParent.setLoadingEnabled(false /* enabled */);
     }
 
     private void retrievePermissionUsageData() {

src/com/android/settings/privacy/PrivacyDashboardFragment.java

@@ -48,6 +48,11 @@ public class PrivacyDashboardFragment extends DashboardFragment {
     private static final String KEY_NOTIFICATION_WORK_PROFILE_NOTIFICATIONS =
             "privacy_lock_screen_work_profile_notifications";
 
+    @VisibleForTesting
+    View mProgressHeader;
+    @VisibleForTesting
+    View mProgressAnimation;
+
     @Override
     public int getMetricsCategory() {
         return SettingsEnums.TOP_LEVEL_PRIVACY;
@@ -73,10 +78,17 @@ public class PrivacyDashboardFragment extends DashboardFragment {
         return buildPreferenceControllers(context, getSettingsLifecycle());
     }
 
+    @Override
+    public void onAttach(Context context) {
+        super.onAttach(context);
+        use(PermissionBarChartPreferenceController.class).setFragment(this /* fragment */);
+    }
+
     @Override
     public void onViewCreated(View view, Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
         styleActionBar();
+        initLoadingBar();
     }
 
     @VisibleForTesting
@@ -97,6 +109,21 @@ public class PrivacyDashboardFragment extends DashboardFragment {
         }
     }
 
+    @VisibleForTesting
+    void initLoadingBar() {
+        mProgressHeader = setPinnedHeaderView(R.layout.progress_header);
+        mProgressAnimation = mProgressHeader.findViewById(R.id.progress_bar_animation);
+        setLoadingEnabled(false);
+    }
+
+    @VisibleForTesting
+    void setLoadingEnabled(boolean enabled) {
+        if (mProgressHeader != null && mProgressAnimation != null) {
+            mProgressHeader.setVisibility(enabled ? View.VISIBLE : View.INVISIBLE);
+            mProgressAnimation.setVisibility(enabled ? View.VISIBLE : View.INVISIBLE);
+        }
+    }
+
     private static List<AbstractPreferenceController> buildPreferenceControllers(
             Context context, Lifecycle lifecycle) {
         final List<AbstractPreferenceController> controllers = new ArrayList<>();