Optimize the tip detector loading performance

Optimize the tip detector loading performance by removing 3 times
redundant IPC with PowerManager and BatteryManager

Test: make -j64 RunSettingsRoboTests ROBOTEST_FILTER="com.android.settings.fuelgauge.batterytip"
Change-Id: I0df8b0c600b743c93dfcdd66aeae07e2aba6b797

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

@@ -18,6 +18,7 @@ package com.android.settings.fuelgauge.batterytip;
 
 import android.content.Context;
 import android.os.BatteryUsageStats;
+import android.os.PowerManager;
 
 import androidx.annotation.VisibleForTesting;
 
@@ -61,11 +62,14 @@ public class BatteryTipLoader extends AsyncLoaderCompat<List<BatteryTip>> {
         final BatteryTipPolicy policy = new BatteryTipPolicy(getContext());
         final BatteryInfo batteryInfo = mBatteryUtils.getBatteryInfo(TAG);
         final Context context = getContext().getApplicationContext();
+        final boolean isPowerSaveMode =
+                context.getSystemService(PowerManager.class).isPowerSaveMode();
 
-        tips.add(new LowBatteryDetector(context, policy, batteryInfo).detect());
+        tips.add(new LowBatteryDetector(context, policy, batteryInfo, isPowerSaveMode).detect());
         tips.add(new HighUsageDetector(context, policy, mBatteryUsageStats, batteryInfo).detect());
         tips.add(new SmartBatteryDetector(
-                context, policy, batteryInfo, context.getContentResolver()).detect());
+                context, policy, batteryInfo, context.getContentResolver(), isPowerSaveMode)
+                        .detect());
         tips.add(new BatteryDefenderDetector(batteryInfo, context).detect());
         tips.add(new DockDefenderDetector(batteryInfo, context).detect());
         tips.add(new IncompatibleChargerDetector(context, batteryInfo).detect());

src/com/android/settings/fuelgauge/batterytip/detectors/BatteryDefenderDetector.java

@@ -37,11 +37,13 @@ public class BatteryDefenderDetector implements BatteryTipDetector {
 
     @Override
     public BatteryTip detect() {
-        if (mBatteryInfo.isOverheated && !FeatureFactory.getFactory(mContext)
+      final boolean isBasicBatteryDefend = mBatteryInfo.isOverheated
+              && !FeatureFactory.getFactory(mContext)
                           .getPowerUsageFeatureProvider(mContext)
-                .isExtraDefend()) {
+                          .isExtraDefend();
-            return new BatteryDefenderTip(BatteryTip.StateType.NEW);
+      final int state = isBasicBatteryDefend
-        }
+              ? BatteryTip.StateType.NEW : BatteryTip.StateType.INVISIBLE;
-        return new BatteryDefenderTip(BatteryTip.StateType.INVISIBLE);
+      final boolean isPluggedIn = mBatteryInfo.pluggedStatus != 0;
+      return new BatteryDefenderTip(state, isPluggedIn);
     }
 }

src/com/android/settings/fuelgauge/batterytip/detectors/LowBatteryDetector.java

@@ -17,7 +17,6 @@
 package com.android.settings.fuelgauge.batterytip.detectors;
 
 import android.content.Context;
-import android.os.PowerManager;
 
 import com.android.settings.fuelgauge.BatteryInfo;
 import com.android.settings.fuelgauge.batterytip.BatteryTipPolicy;
@@ -30,26 +29,27 @@ import java.util.concurrent.TimeUnit;
  * Detect whether the battery is too low
  */
 public class LowBatteryDetector implements BatteryTipDetector {
-    private BatteryInfo mBatteryInfo;
+    private final BatteryInfo mBatteryInfo;
-    private BatteryTipPolicy mPolicy;
+    private final BatteryTipPolicy mPolicy;
-    private PowerManager mPowerManager;
+    private final boolean mIsPowerSaveMode;
-    private int mWarningLevel;
+    private final int mWarningLevel;
 
-    public LowBatteryDetector(Context context, BatteryTipPolicy policy, BatteryInfo batteryInfo) {
+
+    public LowBatteryDetector(Context context, BatteryTipPolicy policy, BatteryInfo batteryInfo,
+            boolean isPowerSaveMode) {
         mPolicy = policy;
         mBatteryInfo = batteryInfo;
-        mPowerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
         mWarningLevel = context.getResources().getInteger(
                 com.android.internal.R.integer.config_lowBatteryWarningLevel);
+        mIsPowerSaveMode = isPowerSaveMode;
     }
 
     @Override
     public BatteryTip detect() {
-        final boolean powerSaveModeOn = mPowerManager.isPowerSaveMode();
         final boolean lowBattery = mBatteryInfo.batteryLevel <= mWarningLevel
                 || (mBatteryInfo.discharging && mBatteryInfo.remainingTimeUs != 0
                 && mBatteryInfo.remainingTimeUs < TimeUnit.HOURS.toMicros(mPolicy.lowBatteryHour));
-        final boolean lowBatteryEnabled = mPolicy.lowBatteryEnabled && !powerSaveModeOn;
+        final boolean lowBatteryEnabled = mPolicy.lowBatteryEnabled && !mIsPowerSaveMode;
         final boolean dischargingLowBatteryState =
                 mPolicy.testLowBatteryTip || (mBatteryInfo.discharging && lowBattery);
 
@@ -61,6 +61,6 @@ public class LowBatteryDetector implements BatteryTipDetector {
             state = BatteryTip.StateType.NEW;
         }
 
-        return new LowBatteryTip(state, powerSaveModeOn);
+        return new LowBatteryTip(state, mIsPowerSaveMode);
     }
 }

src/com/android/settings/fuelgauge/batterytip/detectors/SmartBatteryDetector.java

@@ -18,7 +18,6 @@ package com.android.settings.fuelgauge.batterytip.detectors;
 
 import android.content.ContentResolver;
 import android.content.Context;
-import android.os.PowerManager;
 import android.provider.Settings;
 
 import com.android.settings.fuelgauge.BatteryInfo;
@@ -32,17 +31,17 @@ import com.android.settings.fuelgauge.batterytip.tips.SmartBatteryTip;
 public class SmartBatteryDetector implements BatteryTipDetector {
     private static final int EXPECTED_BATTERY_LEVEL = 30;
 
-    private BatteryInfo mBatteryInfo;
+    private final BatteryInfo mBatteryInfo;
-    private BatteryTipPolicy mPolicy;
+    private final BatteryTipPolicy mPolicy;
-    private ContentResolver mContentResolver;
+    private final ContentResolver mContentResolver;
-    private PowerManager mPowerManager;
+    private final boolean mIsPowerSaveMode;
 
     public SmartBatteryDetector(Context context, BatteryTipPolicy policy, BatteryInfo batteryInfo,
-            ContentResolver contentResolver) {
+            ContentResolver contentResolver, boolean isPowerSaveMode) {
         mPolicy = policy;
         mBatteryInfo = batteryInfo;
         mContentResolver = contentResolver;
-        mPowerManager = context.getSystemService(PowerManager.class);
+        mIsPowerSaveMode = isPowerSaveMode;
     }
 
     @Override
@@ -53,7 +52,7 @@ public class SmartBatteryDetector implements BatteryTipDetector {
                 mBatteryInfo.batteryLevel <= EXPECTED_BATTERY_LEVEL;
         // Show it if in test or smart battery is off.
         final boolean enableSmartBatteryTip =
-                smartBatteryOff && !mPowerManager.isPowerSaveMode() && isUnderExpectedBatteryLevel
+                smartBatteryOff && !mIsPowerSaveMode && isUnderExpectedBatteryLevel
                 || mPolicy.testSmartBatteryTip;
         final int state =
                 enableSmartBatteryTip ? BatteryTip.StateType.NEW : BatteryTip.StateType.INVISIBLE;

src/com/android/settings/fuelgauge/batterytip/tips/BatteryDefenderTip.java

@@ -19,9 +19,6 @@ package com.android.settings.fuelgauge.batterytip.tips;
 import android.app.settings.SettingsEnums;
 import android.content.Context;
 import android.content.Intent;
-import android.content.IntentFilter;
-import android.os.BatteryManager;
-import android.os.Parcel;
 import android.util.Log;
 
 import androidx.preference.Preference;
@@ -39,12 +36,11 @@ public class BatteryDefenderTip extends BatteryTip {
 
     private static final String TAG = "BatteryDefenderTip";
 
-    public BatteryDefenderTip(@StateType int state) {
+    private boolean mIsPluggedIn;
-        super(TipType.BATTERY_DEFENDER, state, false /* showDialog */);
-    }
 
-    private BatteryDefenderTip(Parcel in) {
+    public BatteryDefenderTip(@StateType int state, boolean isPluggedIn) {
-        super(in);
+        super(TipType.BATTERY_DEFENDER, state, false /* showDialog */);
+        mIsPluggedIn = isPluggedIn;
     }
 
     @Override
@@ -92,7 +88,7 @@ public class BatteryDefenderTip extends BatteryTip {
                     resumeCharging(context);
                     preference.setVisible(false);
                 });
-        cardPreference.setPrimaryButtonVisible(isPluggedIn(context));
+        cardPreference.setPrimaryButtonVisible(mIsPluggedIn);
 
         cardPreference.setSecondaryButtonText(context.getString(R.string.learn_more));
         cardPreference.setSecondaryButtonClickListener(
@@ -117,23 +113,4 @@ public class BatteryDefenderTip extends BatteryTip {
 
         Log.i(TAG, "send resume charging broadcast intent=" + intent);
     }
-
-    private boolean isPluggedIn(Context context) {
-        final Intent batteryIntent =
-                context.registerReceiver(
-                        /* receiver= */ null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
-        return batteryIntent != null
-                && batteryIntent.getIntExtra(BatteryManager.EXTRA_PLUGGED, 0) != 0;
-    }
-
-    public static final Creator CREATOR = new Creator() {
-        public BatteryTip createFromParcel(Parcel in) {
-            return new BatteryDefenderTip(in);
-        }
-
-        public BatteryTip[] newArray(int size) {
-            return new BatteryDefenderTip[size];
-        }
-    };
-
 }

src/com/android/settings/fuelgauge/batterytip/tips/DockDefenderTip.java

@@ -19,7 +19,6 @@ package com.android.settings.fuelgauge.batterytip.tips;
 import android.app.settings.SettingsEnums;
 import android.content.Context;
 import android.content.Intent;
-import android.os.Parcel;
 import android.util.Log;
 
 import androidx.preference.Preference;
@@ -44,10 +43,6 @@ public class DockDefenderTip extends BatteryTip {
         mMode = mode;
     }
 
-    private DockDefenderTip(Parcel in) {
-        super(in);
-    }
-
     public int getMode() {
         return mMode;
     }
@@ -162,14 +157,4 @@ public class DockDefenderTip extends BatteryTip {
 
         Log.i(TAG, "send resume charging broadcast intent=" + intent);
     }
-
-    public static final Creator CREATOR = new Creator() {
-        public BatteryTip createFromParcel(Parcel in) {
-            return new DockDefenderTip(in);
-        }
-
-        public BatteryTip[] newArray(int size) {
-            return new DockDefenderTip[size];
-        }
-    };
 }

src/com/android/settings/fuelgauge/batterytip/tips/IncompatibleChargerTip.java

@@ -19,7 +19,6 @@ package com.android.settings.fuelgauge.batterytip.tips;
 import android.app.settings.SettingsEnums;
 import android.content.Context;
 import android.content.Intent;
-import android.os.Parcel;
 import android.util.Log;
 
 import androidx.preference.Preference;
@@ -37,10 +36,6 @@ public final class IncompatibleChargerTip extends BatteryTip {
         super(TipType.INCOMPATIBLE_CHARGER, state, /* showDialog */ false);
     }
 
-    private IncompatibleChargerTip(Parcel in) {
-        super(in);
-    }
-
     @Override
     public CharSequence getTitle(Context context) {
         return context.getString(R.string.battery_tip_incompatible_charging_title);
@@ -89,14 +84,4 @@ public final class IncompatibleChargerTip extends BatteryTip {
         cardPreference.setSecondaryButtonContentDescription(context.getString(
                 R.string.battery_tip_incompatible_charging_content_description));
     }
-
-    public static final Creator CREATOR = new Creator() {
-        public BatteryTip createFromParcel(Parcel in) {
-            return new IncompatibleChargerTip(in);
-        }
-
-        public BatteryTip[] newArray(int size) {
-            return new IncompatibleChargerTip[size];
-        }
-    };
 }

src/com/android/settings/fuelgauge/batterytip/tips/LowBatteryTip.java

@@ -91,5 +91,4 @@ public class LowBatteryTip extends BatteryTip {
             return new LowBatteryTip[size];
         }
     };
-
 }

tests/robotests/src/com/android/settings/fuelgauge/batterytip/BatteryTipDialogFragmentTest.java

@@ -114,7 +114,7 @@ public class BatteryTipDialogFragmentTest {
                 new ArrayList<>(restrictApps));
 
         mUnrestrictAppTip = new UnrestrictAppTip(BatteryTip.StateType.NEW, mAppInfo);
-        mDefenderTip = new BatteryDefenderTip(BatteryTip.StateType.NEW);
+        mDefenderTip = new BatteryDefenderTip(BatteryTip.StateType.NEW, false /* isPluggedIn */);
     }
 
     @After

tests/robotests/src/com/android/settings/fuelgauge/batterytip/BatteryTipUtilsTest.java

@@ -63,7 +63,8 @@ public class BatteryTipUtilsTest {
         mRestrictAppTip = spy(new RestrictAppTip(BatteryTip.StateType.NEW, new ArrayList<>()));
         mLowBatteryTip = spy(
                 new LowBatteryTip(BatteryTip.StateType.NEW, false /* powerSaveModeOn */));
-        mBatteryDefenderTip = spy(new BatteryDefenderTip(BatteryTip.StateType.NEW));
+        mBatteryDefenderTip = spy(new BatteryDefenderTip(BatteryTip.StateType.NEW,
+                false /* isPluggedIn */));
     }
 
     @Test

tests/robotests/src/com/android/settings/fuelgauge/batterytip/detectors/LowBatteryDetectorTest.java

@@ -21,7 +21,6 @@ import static com.google.common.truth.Truth.assertThat;
 import static org.mockito.Mockito.spy;
 
 import android.content.Context;
-import android.os.PowerManager;
 
 import com.android.settings.fuelgauge.BatteryInfo;
 import com.android.settings.fuelgauge.batterytip.BatteryTipPolicy;
@@ -34,8 +33,6 @@ import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 import org.robolectric.RobolectricTestRunner;
 import org.robolectric.RuntimeEnvironment;
-import org.robolectric.Shadows;
-import org.robolectric.shadows.ShadowPowerManager;
 import org.robolectric.util.ReflectionHelpers;
 
 import java.util.concurrent.TimeUnit;
@@ -47,7 +44,6 @@ public class LowBatteryDetectorTest {
     private BatteryInfo mBatteryInfo;
     private BatteryTipPolicy mPolicy;
     private LowBatteryDetector mLowBatteryDetector;
-    private ShadowPowerManager mShadowPowerManager;
     private Context mContext;
 
     @Before
@@ -56,18 +52,19 @@ public class LowBatteryDetectorTest {
 
         mPolicy = spy(new BatteryTipPolicy(RuntimeEnvironment.application));
         mContext = RuntimeEnvironment.application;
-        mShadowPowerManager = Shadows.shadowOf(mContext.getSystemService(PowerManager.class));
         ReflectionHelpers.setField(mPolicy, "lowBatteryEnabled", true);
         ReflectionHelpers.setField(mPolicy, "lowBatteryHour", 3);
         mBatteryInfo.discharging = true;
 
-        mLowBatteryDetector = new LowBatteryDetector(mContext, mPolicy, mBatteryInfo);
+        mLowBatteryDetector = new LowBatteryDetector(mContext, mPolicy, mBatteryInfo,
+                false /* isPowerSaveMode */);
     }
 
     @Test
     public void testDetect_disabledByPolicy_tipInvisible() {
         ReflectionHelpers.setField(mPolicy, "lowBatteryEnabled", false);
-        mShadowPowerManager.setIsPowerSaveMode(true);
+        mLowBatteryDetector = new LowBatteryDetector(mContext, mPolicy, mBatteryInfo,
+                true /* isPowerSaveMode */);
 
         assertThat(mLowBatteryDetector.detect().isVisible()).isFalse();
     }
@@ -92,7 +89,8 @@ public class LowBatteryDetectorTest {
 
     @Test
     public void testDetect_batterySaverOn_tipInvisible() {
-        mShadowPowerManager.setIsPowerSaveMode(true);
+        mLowBatteryDetector = new LowBatteryDetector(mContext, mPolicy, mBatteryInfo,
+                true /* isPowerSaveMode */);
 
         assertThat(mLowBatteryDetector.detect().getState())
                 .isEqualTo(BatteryTip.StateType.INVISIBLE);

tests/robotests/src/com/android/settings/fuelgauge/batterytip/detectors/SmartBatteryDetectorTest.java

@@ -36,8 +36,6 @@ import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 import org.robolectric.RobolectricTestRunner;
 import org.robolectric.RuntimeEnvironment;
-import org.robolectric.Shadows;
-import org.robolectric.shadows.ShadowPowerManager;
 import org.robolectric.util.ReflectionHelpers;
 
 @RunWith(RobolectricTestRunner.class)
@@ -50,7 +48,7 @@ public class SmartBatteryDetectorTest {
     private ContentResolver mContentResolver;
     private SmartBatteryDetector mSmartBatteryDetector;
     private BatteryTipPolicy mPolicy;
-    private ShadowPowerManager mShadowPowerManager;
+
     @Mock
     private BatteryInfo mBatteryInfo;
 
@@ -61,9 +59,8 @@ public class SmartBatteryDetectorTest {
         mContext = RuntimeEnvironment.application;
         mContentResolver = mContext.getContentResolver();
         mPolicy = spy(new BatteryTipPolicy(mContext));
-        mShadowPowerManager = Shadows.shadowOf(mContext.getSystemService(PowerManager.class));
+        mSmartBatteryDetector = new SmartBatteryDetector(mContext, mPolicy, mBatteryInfo,
-        mSmartBatteryDetector =
+                mContentResolver, false /* isPowerSaveMode */);
-                new SmartBatteryDetector(mContext, mPolicy, mBatteryInfo, mContentResolver);
     }
 
     @Test
@@ -77,7 +74,6 @@ public class SmartBatteryDetectorTest {
     public void testDetect_smartBatteryOff_tipVisible() {
         Settings.Global.putInt(mContentResolver,
                 Settings.Global.ADAPTIVE_BATTERY_MANAGEMENT_ENABLED, 0);
-        mShadowPowerManager.setIsPowerSaveMode(false);
         mBatteryInfo.batteryLevel = EXPECTED_BATTERY_LEVEL;
 
         assertThat(mSmartBatteryDetector.detect().isVisible()).isTrue();
@@ -87,8 +83,9 @@ public class SmartBatteryDetectorTest {
     public void testDetect_batterySaverOn_tipInvisible() {
         Settings.Global.putInt(mContentResolver,
                 Settings.Global.ADAPTIVE_BATTERY_MANAGEMENT_ENABLED, 0);
-        mShadowPowerManager.setIsPowerSaveMode(true);
         mBatteryInfo.batteryLevel = EXPECTED_BATTERY_LEVEL;
+        mSmartBatteryDetector = new SmartBatteryDetector(mContext, mPolicy, mBatteryInfo,
+                mContentResolver, true /* isPowerSaveMode */);
 
         assertThat(mSmartBatteryDetector.detect().isVisible()).isFalse();
     }
@@ -97,8 +94,9 @@ public class SmartBatteryDetectorTest {
     public void testDetect_unexpectedBatteryLevel_tipInvisible() {
         Settings.Global.putInt(mContentResolver,
                 Settings.Global.ADAPTIVE_BATTERY_MANAGEMENT_ENABLED, 0);
-        mShadowPowerManager.setIsPowerSaveMode(true);
         mBatteryInfo.batteryLevel = UNEXPECTED_BATTERY_LEVEL;
+        mSmartBatteryDetector = new SmartBatteryDetector(mContext, mPolicy, mBatteryInfo,
+                mContentResolver, true /* isPowerSaveMode */);
 
         assertThat(mSmartBatteryDetector.detect().isVisible()).isFalse();
     }
@@ -107,7 +105,6 @@ public class SmartBatteryDetectorTest {
     public void testDetect_smartBatteryOn_tipInvisible() {
         Settings.Global.putInt(mContentResolver,
                 Settings.Global.ADAPTIVE_BATTERY_MANAGEMENT_ENABLED, 1);
-        mShadowPowerManager.setIsPowerSaveMode(false);
         mBatteryInfo.batteryLevel = EXPECTED_BATTERY_LEVEL;
 
         assertThat(mSmartBatteryDetector.detect().isVisible()).isFalse();

tests/robotests/src/com/android/settings/fuelgauge/batterytip/tips/BatteryDefenderTipTest.java

@@ -26,9 +26,6 @@ import static org.mockito.Mockito.when;
 
 import android.app.settings.SettingsEnums;
 import android.content.Context;
-import android.content.Intent;
-import android.content.IntentFilter;
-import android.os.BatteryManager;
 import android.util.Log;
 
 import androidx.preference.Preference;
@@ -66,7 +63,8 @@ public class BatteryDefenderTipTest {
         mFeatureFactory = FakeFeatureFactory.setupForTest();
         mMetricsFeatureProvider = mFeatureFactory.metricsFeatureProvider;
         mContext = RuntimeEnvironment.application;
-        mBatteryDefenderTip = new BatteryDefenderTip(BatteryTip.StateType.NEW);
+        mBatteryDefenderTip = new BatteryDefenderTip(BatteryTip.StateType.NEW,
+                false /* isPluggedIn */);
 
         when(mPreference.getContext()).thenReturn(mContext);
         when(mCardPreference.getContext()).thenReturn(mContext);
@@ -133,7 +131,8 @@ public class BatteryDefenderTipTest {
 
     @Test
     public void updatePreference_whenCharging_setPrimaryButtonVisibleToBeTrue() {
-        fakeDeviceIsCharging(true);
+        mBatteryDefenderTip = new BatteryDefenderTip(BatteryTip.StateType.NEW,
+                true /* isPluggedIn */);
 
         mBatteryDefenderTip.updatePreference(mCardPreference);
 
@@ -142,8 +141,6 @@ public class BatteryDefenderTipTest {
 
     @Test
     public void updatePreference_whenNotCharging_setPrimaryButtonVisibleToBeFalse() {
-        fakeDeviceIsCharging(false);
-
         mBatteryDefenderTip.updatePreference(mCardPreference);
 
         verify(mCardPreference).setPrimaryButtonVisible(false);
@@ -158,23 +155,10 @@ public class BatteryDefenderTipTest {
         verify(mCardPreference).setPrimaryButtonVisible(false);
     }
 
-    private void fakeDeviceIsCharging(boolean charging) {
-        int charged = charging ? 1 : 0; // 1 means charging, 0:not charging
-        Intent batteryChangedIntent = new Intent(Intent.ACTION_BATTERY_CHANGED);
-        batteryChangedIntent.putExtra(BatteryManager.EXTRA_PLUGGED, charged);
-
-        Context mockContext = mock(Context.class);
-        when(mockContext.getString(anyInt())).thenReturn("fake_string");
-        when(mCardPreference.getContext()).thenReturn(mockContext);
-        when(mockContext.registerReceiver(eq(null), any(IntentFilter.class)))
-                .thenReturn(batteryChangedIntent);
-    }
-
     private void fakeGetChargingStatusFailed() {
         Context mockContext = mock(Context.class);
         when(mockContext.getString(anyInt())).thenReturn("fake_string");
         when(mCardPreference.getContext()).thenReturn(mockContext);
-        when(mockContext.registerReceiver(eq(null), any(IntentFilter.class))).thenReturn(null);
     }
 
     private String getLastErrorLog() {