Add new method to get URI to monitor battery history data is updated

we will reload the database battery history data if its content is changed, which can be done through monitored the database content observer (a part of this patch cl/383366685)

Bug: 192613268
Test: make SettingsRoboTests
Change-Id: I24ab154b1dfa00ca4bf4e6f7b308f5061578bcb5

src/com/android/settings/fuelgauge/PowerUsageAdvanced.java

@@ -19,8 +19,11 @@ import android.app.settings.SettingsEnums;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.database.ContentObserver;
+import android.net.Uri;
 import android.os.BatteryManager;
 import android.os.Bundle;
+import android.os.Handler;
 import android.provider.SearchIndexableResource;
 import android.util.Log;
 
@@ -31,6 +34,7 @@ import androidx.loader.content.Loader;
 
 import com.android.settings.R;
 import com.android.settings.SettingsActivity;
+import com.android.settings.fuelgauge.BatteryBroadcastReceiver;
 import com.android.settings.overlay.FeatureFactory;
 import com.android.settings.search.BaseSearchIndexProvider;
 import com.android.settingslib.core.AbstractPreferenceController;
@@ -63,6 +67,17 @@ public class PowerUsageAdvanced extends PowerUsageBase {
     private BatteryChartPreferenceController mBatteryChartPreferenceController;
     private BatteryAppListPreferenceController mBatteryAppListPreferenceController;
 
+    private final ContentObserver mBatteryObserver =
+            new ContentObserver(new Handler()) {
+            @Override
+            public void onChange(boolean selfChange) {
+                Log.d(TAG, "onBatteryContentChange: " + selfChange);
+                mIsChartDataLoaded = false;
+                restartBatteryStatsLoader(
+                        BatteryBroadcastReceiver.BatteryUpdateType.MANUAL);
+            }
+    };
+
     @Override
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
@@ -104,6 +119,20 @@ public class PowerUsageAdvanced extends PowerUsageBase {
         super.onPause();
         // Resets the flag to reload usage data in onResume() callback.
         mIsChartDataLoaded = false;
+        final Uri uri = mPowerUsageFeatureProvider.getBatteryHistoryUri();
+        if (uri != null) {
+            getContext().getContentResolver().unregisterContentObserver(mBatteryObserver);
+        }
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        final Uri uri = mPowerUsageFeatureProvider.getBatteryHistoryUri();
+        if (uri != null) {
+            getContext().getContentResolver().registerContentObserver(
+                    uri, /*notifyForDescendants*/ true, mBatteryObserver);
+        }
     }
 
     @Override

src/com/android/settings/fuelgauge/PowerUsageFeatureProvider.java

@@ -18,6 +18,7 @@ package com.android.settings.fuelgauge;
 
 import android.content.Context;
 import android.content.Intent;
+import android.net.Uri;
 import android.util.SparseIntArray;
 
 import com.android.internal.os.BatterySipper;
@@ -141,4 +142,9 @@ public interface PowerUsageFeatureProvider {
      * Returns battery history data with corresponding timestamp key.
      */
     Map<Long, Map<String, BatteryHistEntry>> getBatteryHistory(Context context);
+
+    /**
+     * Returns {@link Uri} to monitor battery history data is update.
+     */
+    Uri getBatteryHistoryUri();
 }

src/com/android/settings/fuelgauge/PowerUsageFeatureProviderImpl.java

@@ -19,6 +19,7 @@ package com.android.settings.fuelgauge;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
+import android.net.Uri;
 import android.os.Process;
 import android.util.SparseIntArray;
 
@@ -167,4 +168,9 @@ public class PowerUsageFeatureProviderImpl implements PowerUsageFeatureProvider
     public Map<Long, Map<String, BatteryHistEntry>> getBatteryHistory(Context context) {
         return null;
     }
+
+    @Override
+    public Uri getBatteryHistoryUri() {
+        return null;
+    }
 }