update "Last full charge" preference

When there is average time estimation, change it to "Full charge lasts
about" and also update the time.

Also update the BatteryInfo to return average time estimation even
though it is charging.

Bug: 73018395
Test: RunSettingsRoboTests
Change-Id: Ib22dadb5716e3034c60aeeb7768fdbf0cc86be0c

res/values/strings.xml

@@ -5131,6 +5131,8 @@
     <string name="battery_detail_since_full_charge">Breakdown since last full charge</string>
     <!-- Title for usage time since last full charge. [CHAR LIMIT=60] -->
     <string name="battery_last_full_charge">Last full charge</string>
+    <!-- Title for usage time that full charge lasts. [CHAR LIMIT=60] -->
+    <string name="battery_full_charge_last">Full charge lasts about</string>
     <!-- Description for text in battery footer. [CHAR LIMIT=NONE] -->
     <string name="battery_footer_summary">Battery usage data is approximate and can change based on usage</string>
     <!-- Title for text that shows the amount of time an app has been running while in the foreground. [CHAR LIMIT=80] -->

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

@@ -422,32 +422,24 @@ public class BatteryUtils {
                 new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
         final long elapsedRealtimeUs = PowerUtil.convertMsToUs(
                 SystemClock.elapsedRealtime());
+        final BatteryStats stats = statsHelper.getStats();
         BatteryInfo batteryInfo;
 
-        // 0 means we are discharging, anything else means charging
-        final boolean discharging = batteryBroadcast.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1)
-                == 0;
-        // Get enhanced prediction if available and discharging, otherwise use the old code
-        Estimate estimate = null;
-        if (discharging && mPowerUsageFeatureProvider != null &&
+        final Estimate estimate;
+        // Get enhanced prediction if available
+        if (mPowerUsageFeatureProvider != null &&
                 mPowerUsageFeatureProvider.isEnhancedBatteryPredictionEnabled(mContext)) {
             estimate = mPowerUsageFeatureProvider.getEnhancedBatteryPrediction(mContext);
-        }
-        final BatteryStats stats = statsHelper.getStats();
-        BatteryUtils.logRuntime(tag, "BatteryInfoLoader post query", startTime);
-
-        if (estimate != null) {
-            batteryInfo = BatteryInfo.getBatteryInfo(mContext, batteryBroadcast, stats,
-                    estimate, elapsedRealtimeUs, false /* shortString */);
         } else {
             estimate = new Estimate(
                     PowerUtil.convertUsToMs(stats.computeBatteryTimeRemaining(elapsedRealtimeUs)),
-                    false,
-                    Estimate.AVERAGE_TIME_TO_DISCHARGE_UNKNOWN
-            );
-            batteryInfo = BatteryInfo.getBatteryInfo(mContext, batteryBroadcast, stats,
-                    estimate, elapsedRealtimeUs, false /* shortString */);
+                    false /* isBasedOnUsage */,
+                    Estimate.AVERAGE_TIME_TO_DISCHARGE_UNKNOWN);
         }
+
+        BatteryUtils.logRuntime(tag, "BatteryInfoLoader post query", startTime);
+        batteryInfo = BatteryInfo.getBatteryInfo(mContext, batteryBroadcast, stats,
+                estimate, elapsedRealtimeUs, false /* shortString */);
         BatteryUtils.logRuntime(tag, "BatteryInfoLoader.loadInBackground", startTime);
 
         return batteryInfo;

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

@@ -95,6 +95,8 @@ public class PowerUsageSummary extends PowerUsageBase implements OnLongClickList
     BatteryUtils mBatteryUtils;
     @VisibleForTesting
     LayoutPreference mBatteryLayoutPref;
+    @VisibleForTesting
+    BatteryInfo mBatteryInfo;
 
     /**
      * SparseArray that maps uid to {@link Anomaly}, so we could find {@link Anomaly} by uid
@@ -118,6 +120,8 @@ public class PowerUsageSummary extends PowerUsageBase implements OnLongClickList
                 @Override
                 public void onLoadFinished(Loader<BatteryInfo> loader, BatteryInfo batteryInfo) {
                     mBatteryHeaderPreferenceController.updateHeaderPreference(batteryInfo);
+                    mBatteryInfo = batteryInfo;
+                    updateLastFullChargePreference();
                 }
 
                 @Override
@@ -291,9 +295,7 @@ public class PowerUsageSummary extends PowerUsageBase implements OnLongClickList
 
         // reload BatteryInfo and updateUI
         restartBatteryInfoLoader();
-        final long lastFullChargeTime = mBatteryUtils.calculateLastFullChargeTime(mStatsHelper,
-                System.currentTimeMillis());
-        updateLastFullChargePreference(lastFullChargeTime);
+        updateLastFullChargePreference();
         mScreenUsagePref.setSubtitle(StringUtil.formatElapsedTime(getContext(),
                 mBatteryUtils.calculateScreenUsageTime(mStatsHelper), false));
     }
@@ -314,10 +316,21 @@ public class PowerUsageSummary extends PowerUsageBase implements OnLongClickList
     }
 
     @VisibleForTesting
-    void updateLastFullChargePreference(long timeMs) {
-        final CharSequence timeSequence = StringUtil.formatRelativeTime(getContext(), timeMs,
-                false);
-        mLastFullChargePref.setSubtitle(timeSequence);
+    void updateLastFullChargePreference() {
+        if (mBatteryInfo != null && mBatteryInfo.averageTimeToDischarge
+                != Estimate.AVERAGE_TIME_TO_DISCHARGE_UNKNOWN) {
+            mLastFullChargePref.setTitle(R.string.battery_full_charge_last);
+            mLastFullChargePref.setSubtitle(
+                    StringUtil.formatElapsedTime(getContext(), mBatteryInfo.averageTimeToDischarge,
+                            false /* withSeconds */));
+        } else {
+            final long lastFullChargeTime = mBatteryUtils.calculateLastFullChargeTime(mStatsHelper,
+                    System.currentTimeMillis());
+            mLastFullChargePref.setTitle(R.string.battery_last_full_charge);
+            mLastFullChargePref.setSubtitle(
+                    StringUtil.formatRelativeTime(getContext(), lastFullChargeTime,
+                            false /* withSeconds */));
+        }
     }
 
     @VisibleForTesting

tests/robotests/src/com/android/settings/fuelgauge/PowerUsageSummaryTest.java

@@ -123,6 +123,8 @@ public class PowerUsageSummaryTest {
     private MenuInflater mMenuInflater;
     @Mock
     private MenuItem mAdvancedPageMenu;
+    @Mock
+    private BatteryInfo mBatteryInfo;
 
     private List<BatterySipper> mUsageList;
     private Context mRealContext;
@@ -185,12 +187,28 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testUpdateLastFullChargePreference_showCorrectSummary() {
+    public void testUpdateLastFullChargePreference_noAverageTime_showLastFullChargeSummary() {
+        mFragment.mBatteryInfo = null;
+        when(mFragment.getContext()).thenReturn(mRealContext);
+        doReturn(TIME_SINCE_LAST_FULL_CHARGE_MS).when(
+                mFragment.mBatteryUtils).calculateLastFullChargeTime(any(), anyLong());
+
+        mFragment.updateLastFullChargePreference();
+
+        assertThat(mLastFullChargePref.getTitle()).isEqualTo("Last full charge");
+        assertThat(mLastFullChargePref.getSubtitle()).isEqualTo("2 hr. ago");
+    }
+
+    @Test
+    public void testUpdateLastFullChargePreference_hasAverageTime_showFullChargeLastSummary() {
+        mFragment.mBatteryInfo = mBatteryInfo;
+        mBatteryInfo.averageTimeToDischarge = TIME_SINCE_LAST_FULL_CHARGE_MS;
         when(mFragment.getContext()).thenReturn(mRealContext);
 
-        mFragment.updateLastFullChargePreference(TIME_SINCE_LAST_FULL_CHARGE_MS);
+        mFragment.updateLastFullChargePreference();
 
-        assertThat(mLastFullChargePref.getSubtitle()).isEqualTo("2 hr. ago");
+        assertThat(mLastFullChargePref.getTitle()).isEqualTo("Full charge lasts about");
+        assertThat(mLastFullChargePref.getSubtitle().toString()).isEqualTo("2h");
     }
 
     @Test