耗时盲区监控背景

生命周期的间隔

onResume到Feed展示的间隔

举例:postMessage,很可能在Feed之前执行

耗时盲区监控难点

只知道盲区时间，不清楚具体在做什么

线上盲区无从追查

耗时盲区监控线下方案

TraceView

特别适合一段时间内的盲区监控

线程具体时间做了什么，一目了然

耗时盲区监控线上方案

思考分析

所有方法都是Msg,mLogging?没有Msg具体堆栈

AOP切Handler方法？不清楚准确执行时间

方案

使用统一的Handler：定制具体方法

定制gradle插件，编译期动态替换

public class GetDetailHandlerHelper {

    private static ConcurrentHashMap<Message, String> sMsgDetail = new ConcurrentHashMap<>();

    public static ConcurrentHashMap<Message, String> getMsgDetail() {
        return sMsgDetail;
    }

}

public class SuperHandler extends Handler {

    private long mStartTime = System.currentTimeMillis();

    public SuperHandler() {
        super(Looper.myLooper(), null);
    }

    public SuperHandler(Callback callback) {
        super(Looper.myLooper(), callback);
    }

    public SuperHandler(Looper looper, Callback callback) {
        super(looper, callback);
    }

    public SuperHandler(Looper looper) {
        super(looper);
    }

    @Override
    public boolean sendMessageAtTime(Message msg, long uptimeMillis) {
        boolean send = super.sendMessageAtTime(msg, uptimeMillis);
        if (send) {
            GetDetailHandlerHelper.getMsgDetail().put(msg, Log.getStackTraceString(new Throwable()).replace("java.lang.Throwable", ""));
        }
        return send;
    }

    @Override
    public void dispatchMessage(Message msg) {
        mStartTime = System.currentTimeMillis();
        super.dispatchMessage(msg);

        if (GetDetailHandlerHelper.getMsgDetail().containsKey(msg)
                && Looper.myLooper() == Looper.getMainLooper()) {
            JSONObject jsonObject = new JSONObject();
            try {
                jsonObject.put("Msg_Cost", System.currentTimeMillis() - mStartTime);
                jsonObject.put("MsgTrace", msg.getTarget() + " " + GetDetailHandlerHelper.getMsgDetail().get(msg));

                LogUtils.i("MsgDetail " + jsonObject.toString());
                GetDetailHandlerHelper.getMsgDetail().remove(msg);
            } catch (Exception e) {
            }
        }
    }

}