Merge "SubscriptionManager: Cache created resources"

import android.telephony.ims.ImsMmTelManager;

import android.util.DisplayMetrics;

import android.util.Log;

import android.util.Pair;

import com.android.internal.telephony.ISetOpportunisticDataCallback;

import com.android.internal.telephony.ISub;

import java.util.List;

import java.util.Locale;

import java.util.Map;

import java.util.concurrent.ConcurrentHashMap;

import java.util.concurrent.Executor;

import java.util.concurrent.TimeUnit;

import java.util.function.Consumer;

    private final Context mContext;

    private volatile INetworkPolicyManager mNetworkPolicy;

    // Cache of Resource that has been created in getResourcesForSubId. Key is a Pair containing

    // the Context and subId.

    private static final Map<Pair<Context, Integer>, Resources> sResourcesCache =

            new ConcurrentHashMap<>();

    /**

     * A listener class for monitoring changes to {@link SubscriptionInfo} records.

     * <p>

     * @return Resources associated with Subscription.

     * @hide

     */

    @NonNull

    public static Resources getResourcesForSubId(Context context, int subId,

            boolean useRootLocale) {

        // Check if resources for this context and subId already exist in the resource cache.

        // Resources that use the root locale are not cached.

        Pair<Context, Integer> cacheKey = null;

        if (isValidSubscriptionId(subId) && !useRootLocale) {

            cacheKey = Pair.create(context, subId);

            if (sResourcesCache.containsKey(cacheKey)) {

                // Cache hit. Use cached Resources.

                return sResourcesCache.get(cacheKey);

            }

        }

        final SubscriptionInfo subInfo =

                SubscriptionManager.from(context).getActiveSubscriptionInfo(subId);

        DisplayMetrics metrics = context.getResources().getDisplayMetrics();

        DisplayMetrics newMetrics = new DisplayMetrics();

        newMetrics.setTo(metrics);

        return new Resources(context.getResources().getAssets(), newMetrics, newConfig);

        Resources res = new Resources(context.getResources().getAssets(), newMetrics, newConfig);

        if (cacheKey != null) {

            // Save the newly created Resources in the resource cache.

            sResourcesCache.put(cacheKey, res);

        }

        return res;

    }

    /**