Update battery states text

- Update progress bar bottom text when battery states changed(charging,
 discharging, power saver and low battery)

Bug: 183689347
Bug: 177407113
Test: make SettingsRoboTests
Change-Id: I0397eb1dea7fcb14357750f84d1d5b1a7dc7d19a

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

@@ -33,6 +33,7 @@ import androidx.preference.PreferenceScreen;
 import com.android.settings.R;
 import com.android.settings.core.BasePreferenceController;
 import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settings.fuelgauge.batterytip.tips.BatteryTip;
 import com.android.settings.overlay.FeatureFactory;
 import com.android.settings.widget.EntityHeaderController;
 import com.android.settingslib.Utils;
@@ -60,6 +61,7 @@ public class BatteryHeaderPreferenceController extends BasePreferenceController
     private Activity mActivity;
     private PreferenceFragmentCompat mHost;
     private Lifecycle mLifecycle;
+    private BatteryTip mBatteryTip;
     private final PowerManager mPowerManager;
 
     public BatteryHeaderPreferenceController(Context context, String key) {
@@ -109,8 +111,26 @@ public class BatteryHeaderPreferenceController extends BasePreferenceController
         if (BatteryUtils.isBatteryDefenderOn(info)) {
             return null;
         } else if (info.remainingLabel == null) {
+            // Present status independently if no remaining time
             return info.statusLabel;
+        } else if (info.statusLabel != null && !info.discharging) {
+            // Charging state
+            return mContext.getString(
+                    R.string.battery_state_and_duration, info.statusLabel, info.remainingLabel);
+        } else if (mPowerManager.isPowerSaveMode()) {
+            // Power save mode is on
+            final String powerSaverOn = mContext.getString(
+                    R.string.battery_tip_early_heads_up_done_title);
+            return mContext.getString(
+                    R.string.battery_state_and_duration, powerSaverOn, info.remainingLabel);
+        } else if (mBatteryTip != null
+                && mBatteryTip.getType() == BatteryTip.TipType.LOW_BATTERY) {
+            // Low battery state
+            final String lowBattery = mContext.getString(R.string.low_battery_summary);
+            return mContext.getString(
+                    R.string.battery_state_and_duration, lowBattery, info.remainingLabel);
         } else {
+            // Discharging state
             return info.remainingLabel;
         }
     }
@@ -140,6 +160,17 @@ public class BatteryHeaderPreferenceController extends BasePreferenceController
         mBatteryUsageProgressBarPref.setPercent(batteryLevel, BATTERY_MAX_LEVEL);
     }
 
+    /**
+     * Update summary when battery tips changed.
+     */
+    public void updateHeaderByBatteryTips(BatteryTip batteryTip, BatteryInfo batteryInfo) {
+        mBatteryTip = batteryTip;
+
+        if (mBatteryTip != null && batteryInfo != null) {
+            updateHeaderPreference(batteryInfo);
+        }
+    }
+
     private CharSequence formatBatteryPercentageText(int batteryLevel) {
         return TextUtils.expandTemplate(mContext.getText(R.string.battery_header_title_alternate),
                 NumberFormat.getIntegerInstance().format(batteryLevel));

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

@@ -94,6 +94,8 @@ public class PowerUsageSummary extends PowerUsageBase implements
                 @Override
                 public void onLoadFinished(Loader<BatteryInfo> loader, BatteryInfo batteryInfo) {
                     mBatteryHeaderPreferenceController.updateHeaderPreference(batteryInfo);
+                    mBatteryHeaderPreferenceController.updateHeaderByBatteryTips(
+                            mBatteryTipPreferenceController.getCurrentBatteryTip(), batteryInfo);
                     mBatteryInfo = batteryInfo;
                 }
 
@@ -115,6 +117,8 @@ public class PowerUsageSummary extends PowerUsageBase implements
                 public void onLoadFinished(Loader<List<BatteryTip>> loader,
                         List<BatteryTip> data) {
                     mBatteryTipPreferenceController.updateBatteryTips(data);
+                    mBatteryHeaderPreferenceController.updateHeaderByBatteryTips(
+                            mBatteryTipPreferenceController.getCurrentBatteryTip(), mBatteryInfo);
                 }
 
                 @Override

src/com/android/settings/fuelgauge/batterytip/BatteryTipPreferenceController.java

@@ -16,6 +16,7 @@
 
 package com.android.settings.fuelgauge.batterytip;
 
+import android.annotation.Nullable;
 import android.content.Context;
 import android.os.Bundle;
 
@@ -162,6 +163,19 @@ public class BatteryTipPreferenceController extends BasePreferenceController {
         return mNeedUpdate;
     }
 
+    /**
+     * @return current battery tips, null if unavailable.
+     */
+    @Nullable
+    public BatteryTip getCurrentBatteryTip() {
+        if (mBatteryTips == null) {
+            return null;
+        }
+
+        return mBatteryTips.stream().anyMatch(BatteryTip::isVisible)
+                ? mBatteryTips.stream().filter(BatteryTip::isVisible).findFirst().get() : null;
+    }
+
     /**
      * Listener to give the control back to target fragment
      */