记录第一个Activity的onCreate时间

@Override
public void onActivityCreated(Activity activity) {
super.onActivityCreated(activity);
if (isFirstActivityCreate && mFirstActivityMap.isEmpty()) {
String activityName = activity.getComponentName().getClassName();
mFirstActivityIndex = getMethodBeat().getCurIndex();
mFirstActivityName = activityName;
mFirstActivityMap.put(activityName, System.currentTimeMillis());
MatrixLog.i(TAG, "[onActivityCreated] first activity:%s index:%s", mFirstActivityName, mFirstActivityIndex);
getMethodBeat().lockBuffer(true);
}
}
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记录Activity获取焦点的时间（在编译期，在Activity子类的onWindowFocusChange方法中插入MethodBeat.at方法）

public static void at(Activity activity, boolean isFocus) {
MatrixLog.i(TAG, "[AT] activity: %s, isCreated: %b sListener size: %d，isFocus: %b",
activity.getClass(http://www.amjmh.com/v/BIBRGZ_558768/).getSimpleName(), isCreated, sListeners.size(), isFocus);
if (isCreated && Thread.currentThread() == sMainThread) {
for (IMethodBeatListener listener : sListeners) {
listener.onActivityEntered(activity, isFocus, sIndex - 1, sBuffer);
}
}
}
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当Activity获取到焦点时，认为启动阶段结束（若有SplashActivity，则记录下一个Activity获取焦点的时间）

@Override
public void onActivityEntered(Activity activity, boolean isFocus, int nowIndex, long[] buffer) {
...启动数据分析
}