Merge "Reduce memory usage."

import android.annotation.CurrentTimeMillisLong;

import android.annotation.NonNull;

import android.annotation.Nullable;

import android.os.Build;

import android.util.IndentingPrintWriter;

import android.util.Log;

import android.util.SparseLongArray;

import android.util.TimeUtils;

 * Ledger to track the last recorded balance and recent activities of an app.

 */

class Ledger {

    private static final String TAG = "TARE-" + Ledger.class.getSimpleName();

    private static final boolean DEBUG = InternalResourceService.DEBUG

            || Log.isLoggable(TAG, Log.DEBUG);

    /** The window size within which rewards will be counted and used towards reward limiting. */

    private static final long TOTAL_REWARD_WINDOW_MS = 24 * HOUR_IN_MILLIS;

    /** The number of buckets to split {@link #TOTAL_REWARD_WINDOW_MS} into. */

            TOTAL_REWARD_WINDOW_MS / NUM_REWARD_BUCKET_WINDOWS;

    /** The maximum number of transactions to retain in memory at any one time. */

    @VisibleForTesting

    static final int MAX_TRANSACTION_COUNT = 50;

    static final int MAX_TRANSACTION_COUNT = Build.IS_ENG || Build.IS_USERDEBUG || DEBUG ? 32 : 4;

    static class Transaction {

        public final long startTimeMs;

            this.startTimeMs = startTimeMs;

            this.endTimeMs = endTimeMs;

            this.eventId = eventId;

            this.tag = tag;

            this.tag = tag == null ? null : tag.intern();

            this.delta = delta;

            this.ctp = ctp;

        }