定义在 ITransactionCompletedListener.h 中。

class TransactionStats : public Parcelable {
public:
    status_t writeToParcel(Parcel* output) const override;
    status_t readFromParcel(const Parcel* input) override;

    TransactionStats() = default;
    TransactionStats(const std::vector<CallbackId>& ids) : callbackIds(ids) {}
    TransactionStats(const std::unordered_set<CallbackId, CallbackIdHash>& ids)
          : callbackIds(ids.begin(), ids.end()) {}
    TransactionStats(const std::vector<CallbackId>& ids, nsecs_t latch, const sp<Fence>& present,
                     const std::vector<SurfaceStats>& surfaces)
          : callbackIds(ids), latchTime(latch), presentFence(present), surfaceStats(surfaces) {}

    std::vector<CallbackId> callbackIds;
    nsecs_t latchTime = -1;
    sp<Fence> presentFence = nullptr;
    std::vector<SurfaceStats> surfaceStats;
};

• 构造函数接收 CallbackId 向量或 set。
• 字段有 CallbackId 向量和 SurfaceStats 向量。