Refactor getting allowlist set from feature provider.

(1) Use Set<CharSequence> for all the allowlists.
(2) The contains() method of Set<CharSequence> also works for String. No
    need an extra contains() util function.

Bug: 262802531
Fix: 262802531
Test: presubmit
Change-Id: Ib2aaf9a3b8db4618a8c46f138e8d35f15b77c104

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

@@ -146,9 +146,9 @@ public interface PowerUsageFeatureProvider {
     Set<CharSequence> getHideBackgroundUsageTimeSet(Context context);
 
     /**
-     * Returns package names for hiding application in the usage screen.
+     * Returns {@link Set} for hiding application package names in the usage screen.
      */
-    CharSequence[] getHideApplicationEntries(Context context);
+    Set<CharSequence> getHideApplicationSet(Context context);
 
     /**
      * Returns {@link Set} for ignoring task root class names for screen on time.

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

@@ -162,8 +162,8 @@ public class PowerUsageFeatureProviderImpl implements PowerUsageFeatureProvider
     }
 
     @Override
-    public CharSequence[] getHideApplicationEntries(Context context) {
-        return new CharSequence[0];
+    public Set<CharSequence> getHideApplicationSet(Context context) {
+        return new ArraySet<>();
     }
 
     @Override

src/com/android/settings/fuelgauge/batteryusage/DataProcessor.java

@@ -280,9 +280,7 @@ public final class DataProcessor {
                     case Event.DEVICE_SHUTDOWN:
                         final String taskRootClassName = event.getTaskRootClassName();
                         if (!TextUtils.isEmpty(taskRootClassName)
-                                && !ignoreScreenOnTimeTaskRootSet.isEmpty()
-                                && contains(
-                                        taskRootClassName, ignoreScreenOnTimeTaskRootSet)) {
+                                && ignoreScreenOnTimeTaskRootSet.contains(taskRootClassName)) {
                             Log.w(TAG, String.format(
                                     "Ignoring a usage event with task root class name %s, "
                                             + "(timestamp=%d, type=%d)",
@@ -1238,14 +1236,14 @@ public final class DataProcessor {
     private static void purgeFakeAndHiddenPackages(
             final Context context,
             final Map<Integer, Map<Integer, BatteryDiffData>> resultMap) {
-        final Set<CharSequence> backgroundUsageTimeHideList =
+        final Set<CharSequence> hideBackgroundUsageTimeSet =
                 FeatureFactory.getFactory(context)
                         .getPowerUsageFeatureProvider(context)
                         .getHideBackgroundUsageTimeSet(context);
-        final CharSequence[] notAllowShowEntryPackages =
+        final Set<CharSequence> hideApplicationSet =
                 FeatureFactory.getFactory(context)
                         .getPowerUsageFeatureProvider(context)
-                        .getHideApplicationEntries(context);
+                        .getHideApplicationSet(context);
         resultMap.keySet().forEach(dailyKey -> {
             final Map<Integer, BatteryDiffData> dailyUsageMap = resultMap.get(dailyKey);
             dailyUsageMap.values().forEach(diffEntryLists -> {
@@ -1253,30 +1251,31 @@ public final class DataProcessor {
                     return;
                 }
                 purgeFakeAndHiddenPackages(
-                        diffEntryLists.getAppDiffEntryList(), backgroundUsageTimeHideList,
-                        notAllowShowEntryPackages);
+                        diffEntryLists.getAppDiffEntryList(), hideBackgroundUsageTimeSet,
+                        hideApplicationSet);
                 purgeFakeAndHiddenPackages(
-                        diffEntryLists.getSystemDiffEntryList(), backgroundUsageTimeHideList,
-                        notAllowShowEntryPackages);
+                        diffEntryLists.getSystemDiffEntryList(), hideBackgroundUsageTimeSet,
+                        hideApplicationSet);
             });
         });
     }
 
     private static void purgeFakeAndHiddenPackages(
             final List<BatteryDiffEntry> entries,
-            final Set<CharSequence> backgroundUsageTimeHideList,
-            final CharSequence[] notAllowShowEntryPackages) {
+            final Set<CharSequence> hideBackgroundUsageTimeSet,
+            final Set<CharSequence> hideApplicationSet) {
         final Iterator<BatteryDiffEntry> iterator = entries.iterator();
         while (iterator.hasNext()) {
             final BatteryDiffEntry entry = iterator.next();
             final String packageName = entry.getPackageName();
+            if (packageName == null) {
+                continue;
+            }
             if (ConvertUtils.FAKE_PACKAGE_NAME.equals(packageName)
-                    || contains(packageName, notAllowShowEntryPackages)) {
+                    || hideApplicationSet.contains(packageName)) {
                 iterator.remove();
             }
-            if (packageName != null
-                    && !backgroundUsageTimeHideList.isEmpty()
-                    && contains(packageName, backgroundUsageTimeHideList)) {
+            if (hideBackgroundUsageTimeSet.contains(packageName)) {
                 entry.mBackgroundUsageTimeInMs = 0;
             }
         }
@@ -1465,18 +1464,6 @@ public final class DataProcessor {
         return calendar.getTimeInMillis();
     }
 
-    /** Whether the Set contains the target. */
-    private static boolean contains(String target, Set<CharSequence> packageNames) {
-        if (target != null && packageNames != null) {
-            for (CharSequence packageName : packageNames) {
-                if (TextUtils.equals(target, packageName)) {
-                    return true;
-                }
-            }
-        }
-        return false;
-    }
-
     private static long getDiffValue(long v1, long v2, long v3) {
         return (v2 > v1 ? v2 - v1 : 0) + (v3 > v2 ? v3 - v2 : 0);
     }
@@ -1521,20 +1508,6 @@ public final class DataProcessor {
         return sFakeCurrentTimeMillis > 0 ? sFakeCurrentTimeMillis : System.currentTimeMillis();
     }
 
-    /**
-     * @return Returns whether the target is in the CharSequence array.
-     */
-    private static boolean contains(String target, CharSequence[] packageNames) {
-        if (target != null && packageNames != null) {
-            for (CharSequence packageName : packageNames) {
-                if (TextUtils.equals(target, packageName)) {
-                    return true;
-                }
-            }
-        }
-        return false;
-    }
-
     private static void log(Context context, final String content, final long timestamp,
             final BatteryHistEntry entry) {
         if (DEBUG) {

tests/robotests/src/com/android/settings/fuelgauge/batteryusage/BatteryChartPreferenceControllerTest.java

@@ -57,6 +57,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
+import java.util.Set;
 import java.util.TimeZone;
 
 @RunWith(RobolectricTestRunner.class)
@@ -92,9 +93,9 @@ public final class BatteryChartPreferenceControllerTest {
         final Resources resources = spy(mContext.getResources());
         resources.getConfiguration().setLocales(new LocaleList(new Locale("en_US")));
         doReturn(resources).when(mContext).getResources();
-        doReturn(new String[]{"com.android.gms.persistent"})
+        doReturn(Set.of("com.android.gms.persistent"))
                 .when(mFeatureFactory.powerUsageFeatureProvider)
-                .getHideApplicationEntries(mContext);
+                .getHideApplicationSet(mContext);
         doReturn(mLayoutParams).when(mDailyChartView).getLayoutParams();
         doReturn(mIntent).when(mContext).registerReceiver(any(), any());
         doReturn(100).when(mIntent).getIntExtra(eq(BatteryManager.EXTRA_SCALE), anyInt());

tests/robotests/src/com/android/settings/fuelgauge/batteryusage/BatteryUsageBreakdownControllerTest.java

@@ -48,6 +48,7 @@ import org.robolectric.RuntimeEnvironment;
 
 import java.util.Arrays;
 import java.util.Locale;
+import java.util.Set;
 import java.util.TimeZone;
 
 @RunWith(RobolectricTestRunner.class)
@@ -86,9 +87,9 @@ public final class BatteryUsageBreakdownControllerTest {
         final Resources resources = spy(mContext.getResources());
         resources.getConfiguration().setLocales(new LocaleList(new Locale("en_US")));
         doReturn(resources).when(mContext).getResources();
-        doReturn(new String[]{"com.android.gms.persistent"})
+        doReturn(Set.of("com.android.gms.persistent"))
                 .when(mFeatureFactory.powerUsageFeatureProvider)
-                .getHideApplicationEntries(mContext);
+                .getHideApplicationSet(mContext);
         mBatteryUsageBreakdownController = createController();
         mBatteryUsageBreakdownController.mAppListPreferenceGroup = mAppListPreferenceGroup;
         mBatteryDiffEntry = new BatteryDiffEntry(

tests/robotests/src/com/android/settings/fuelgauge/batteryusage/DataProcessorTest.java

@@ -60,6 +60,7 @@ import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.TimeZone;
 
 @RunWith(RobolectricTestRunner.class)
@@ -1062,8 +1063,8 @@ public class DataProcessorTest {
         final List<Integer> levels = List.of(100, 100);
         hourlyBatteryLevelsPerDay.add(
                 new BatteryLevelData.PeriodBatteryLevelData(timestamps, levels));
-        when(mPowerUsageFeatureProvider.getHideApplicationEntries(mContext))
-                .thenReturn(new CharSequence[]{"package1"});
+        when(mPowerUsageFeatureProvider.getHideApplicationSet(mContext))
+                .thenReturn(Set.of("package1"));
 
         final Map<Integer, Map<Integer, BatteryDiffData>> resultMap =
                 DataProcessor.getBatteryUsageMap(