Merge "Fix feature flag page animation"

import androidx.preference.PreferenceScreen;

import com.android.settings.core.BasePreferenceController;

import com.android.settingslib.core.lifecycle.LifecycleObserver;

import com.android.settingslib.core.lifecycle.events.OnStart;

import java.util.Map;

public class FeatureFlagsPreferenceController extends BasePreferenceController

        implements LifecycleObserver, OnStart {

/**

 * A {@link BasePreferenceController} used in {@link FeatureFlagsDashboard}

 */

public class FeatureFlagsPreferenceController extends BasePreferenceController {

    private PreferenceGroup mGroup;

    public void displayPreference(PreferenceScreen screen) {

        super.displayPreference(screen);

        mGroup = screen.findPreference(getPreferenceKey());

    }

    @Override

    public void onStart() {

        if (mGroup == null) {

            return;

        }

        final Map<String, String> featureMap = FeatureFlagUtils.getAllFeatureFlags();

        if (featureMap == null) {

            return;

import android.content.Context;

import android.os.Build;

import android.os.SystemProperties;

import androidx.preference.PreferenceCategory;

import androidx.preference.PreferenceScreen;

    @Test

    public void onStart_shouldRefreshFeatureFlags() {

        mController.onStart();

        mController.displayPreference(mScreen);

        verify(mCategory).removeAll();

        verify(mCategory, atLeastOnce()).addPreference(any(FeatureFlagPreference.class));

    }

}